CA2008769C - Tamper-indicating plastic closure - Google Patents
Tamper-indicating plastic closure Download PDFInfo
- Publication number
- CA2008769C CA2008769C CA 2008769 CA2008769A CA2008769C CA 2008769 C CA2008769 C CA 2008769C CA 2008769 CA2008769 CA 2008769 CA 2008769 A CA2008769 A CA 2008769A CA 2008769 C CA2008769 C CA 2008769C
- Authority
- CA
- Canada
- Prior art keywords
- closure
- annular
- pilfer band
- tamper
- frangible
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
- B65D41/3428—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/3442—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container
- B65D41/3447—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container the tamper element being integrally connected to the closure by means of bridges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
- Tubes (AREA)
Abstract
A tamper-indicating plastic closure is disclosed, with the closure configured for interfering coaction with an associated container. The closure includes a plastic cap having a top wall portion and an internally threaded annular skirt portion, with an annular pilfer band depending therefrom. The pilfer band includes a plurality of circumferentially spaced flexible tabs configured for interfering engagement with an annular locking ring portion of the associated container. The pilfer band further includes an annular interference bead positioned beneath the flexible tabs.
By this arrangement, two modes of interfering engagement with the associated container locking ring are provided.
In an alternate embodiment, the pilfer band includes an angularly skewed interference lip and centering ribs.
By this arrangement, two modes of interfering engagement with the associated container locking ring are provided.
In an alternate embodiment, the pilfer band includes an angularly skewed interference lip and centering ribs.
Description
TA~PER--IlJDICATING PI~STIC CI~SURE
Cross~Reference To Related ApPlication This application is a continuation-in-part of U.S. patent application Serial No. 07/343,995, filed April 26, 1989.
Teehnical Field The present invention relates generally to tamper-indicating or tamper evident packaging ~rrangements, and more particularly to a ~amper-indicating plastic closure for a container which functions to provide two modes of interference with the container for ~nh~nceA tamper resistance.
Back~loulld Of ~he Inventi3n The provision of tamper-indicating or tamper-evident closures for containers is desirable for all manner of consumer products, so that partial or complete ~emoval of tha closure results in clearly discernable visible alteration thereof. Typically, closures of this nature include an upper cap portion, and a depending pilfer band arranged to interact and cooperate with the container to which the clo~ure is applied. The pilfer band is typically configured so as to fracture and/or separate from the closure cap atte~nt to closure removal, thereby providing clearly discernable evidence that the container has been partially or completely opened.
As will be appreciated, it is desirable for a tamper-indicating closure to be as resistant as possible to tampering or the like without visibly discernable evidence thereof. To this end, the present plastiG
closure has been particularly configured for economical and efficient manufacture for use on existing - containers, with the closure being highly resistant to tampering, consistent and reliable in performance, and .
Cross~Reference To Related ApPlication This application is a continuation-in-part of U.S. patent application Serial No. 07/343,995, filed April 26, 1989.
Teehnical Field The present invention relates generally to tamper-indicating or tamper evident packaging ~rrangements, and more particularly to a ~amper-indicating plastic closure for a container which functions to provide two modes of interference with the container for ~nh~nceA tamper resistance.
Back~loulld Of ~he Inventi3n The provision of tamper-indicating or tamper-evident closures for containers is desirable for all manner of consumer products, so that partial or complete ~emoval of tha closure results in clearly discernable visible alteration thereof. Typically, closures of this nature include an upper cap portion, and a depending pilfer band arranged to interact and cooperate with the container to which the clo~ure is applied. The pilfer band is typically configured so as to fracture and/or separate from the closure cap atte~nt to closure removal, thereby providing clearly discernable evidence that the container has been partially or completely opened.
As will be appreciated, it is desirable for a tamper-indicating closure to be as resistant as possible to tampering or the like without visibly discernable evidence thereof. To this end, the present plastiG
closure has been particularly configured for economical and efficient manufacture for use on existing - containers, with the closure being highly resistant to tampering, consistent and reliable in performance, and .
highly ~ersatila for use with a wide variety of different containers.
Summary Of The Inventio~
The present invention relates to a tamper-indicating plasti~ ciosure ~or a container having a typical annular locking ring positioned adjacent to and beneath the ~hreads on the neck portion of the container. For tamper-indication, ~he closure includes a pilfer band having a plurality o~ inwardly ext~n~ing flexible tabs, with the pilfer band further including a coacting int rference bead positioned beneath the flexible tabs. Notably, the pilfer band ~unctions to provide dual modes of interfering interactio~ with the container locking ring for tamper-indication.
In accordancQ with the invention, the present plastic closure includes a plastic cap having a circular top wall portion, and an annular depPn~ing cylindrical skirt portion. In the illustrated embo~; -nt, the skirt portion includes an internal thread formation adapted ~or coaction with a mating thread formation on the neck portion o~ the associated container for retaini ng the closure thereon after application to the container.
The present closure further includes an annular, integrally formed pilfer band depP~ing from ~5 the skirt portion of the closure cap. The pilfer band is at least partially detachably connected to the skirt portion of the cap by a plurality of circumferentially spaced frangible ribs. In the illu~trated e~bodiment, the frangible ribs extend between inside surfaces of the skirt portion and pilfer band, with the ~kirt portion and pilfer band otherwise being distin~li~he~ and separated from each other by a circumferential score line which extends partially into the frangible ribs.
The pilfer band includes an annular band portion, and a plurality of circumferentially spaced, 7~
Summary Of The Inventio~
The present invention relates to a tamper-indicating plasti~ ciosure ~or a container having a typical annular locking ring positioned adjacent to and beneath the ~hreads on the neck portion of the container. For tamper-indication, ~he closure includes a pilfer band having a plurality o~ inwardly ext~n~ing flexible tabs, with the pilfer band further including a coacting int rference bead positioned beneath the flexible tabs. Notably, the pilfer band ~unctions to provide dual modes of interfering interactio~ with the container locking ring for tamper-indication.
In accordancQ with the invention, the present plastic closure includes a plastic cap having a circular top wall portion, and an annular depPn~ing cylindrical skirt portion. In the illustrated embo~; -nt, the skirt portion includes an internal thread formation adapted ~or coaction with a mating thread formation on the neck portion o~ the associated container for retaini ng the closure thereon after application to the container.
The present closure further includes an annular, integrally formed pilfer band depP~ing from ~5 the skirt portion of the closure cap. The pilfer band is at least partially detachably connected to the skirt portion of the cap by a plurality of circumferentially spaced frangible ribs. In the illu~trated e~bodiment, the frangible ribs extend between inside surfaces of the skirt portion and pilfer band, with the ~kirt portion and pilfer band otherwise being distin~li~he~ and separated from each other by a circumferential score line which extends partially into the frangible ribs.
The pilfer band includes an annular band portion, and a plurality of circumferentially spaced, 7~
inwardly extDn~ing flexible tabs which extend inwardly of the annular band portion. Notably, the pilfer band further includes an annular interference bead ex~n~;ng generally inwardly of the annular ~and portion, with the inter~erence bead positioned beneath the inwardly ext~n~ing flexible tabs.
By this arrangement, two mode~ of interfering interaction, for tamper-indication, are provided between the flexible tab~ and the annular locking ring o~ the container. During application of the closure to the container, the ~lexible tabs are bent upwardly to an out-of-the-way disposition as the pil~er band moves downwardly past the container threads and locking ring.
As the closure is-fully seated on the container, the ~lexible tabs mov~ past the container locking ring, and due to their re~ilient memory, move inwardly to assume an angularly generally upwardly and inwardly disposition relative to the annular band portion. In this disposition of the flexible tab~, they are positioned for interfering engagement with the generally downwardly facing surface of the container locking ring, whereby in this first mode of inter~erence, the free end portions ~f the flexible tabs engage the lo~ki ng ring for ~racturing the franqible ribs which at l~ast partially detachably connect the pilfer band to the skirt portion o~ the closure cap. Clearly visible evidence of opening is thus provided.
In a second mode o~ interfering interaction, the flexible tabs cooperate and coact with the interference bead of the pilfer band to again interferingly engage and coact with the container lo~kin~ ring. In thi6 mode of op~ration, the ~lexible tabs are engageable with the container lo~kinq ring in the event that the flexible tabs assume an angularly downwardly and inwardly ext~n~ing disposition relative to the annular band portion of the pilfer band. In this orientation, the ~lexible tabs are engageable with the container locking ring by disposition between the locking ring and the annular interference bead. The flexible tabs and interference bead are dimensioned relative to the container locking ring so as to r~sist opening muv~ ient of the closure, thereby fracturing the frangible ribs joining the pilfer band to the skirt portion. Again, clear visua~ evidence of opening is 1~ achieved.
In accordance with alternate, illustrated ~ ho~; -nts of the present closure, a scoring bead can be provided which extends circumferentially on the inside surface of the closure, and which desirably acts to support the interior of the closure during formation of the circumferential score whic~ distinguishes the pilfer band from the skirt portion of the closure.
Additionally, at least some of the frangible ribs of the construction can be configured to extend on the inside surface of the pilfer band between adjacent ones of the flexible tabs. Such ribs desirably function to center the pilfer band on the associated container with respect to the locking ring thereof, thus further enhancing tamper resistance. If desired~ a plurality of ~5 circumferentially spaced prestressing projections can be provided on the inside of the pilfer band, with these pro;ections being engageable with the container locking ring for prestressing the frangible ribs joining the pilfer band to the closure skirt portion. This prestressing arrangement can desirably promote failure of the frangible ribs in the intPnfle~ ~nnPr.
Numerous other features and advantages of the present invention will become readily apparent from the following detailed description, the acc ~nying 3S drawings, and the appended claims.
Brief DescriPtion Of The Drawings FIGURE 1 is a side elevational view, in partial cross-sec~ion, of a tamper-indicating plastic closure embodying the principles of the present invention applied to an associated container;
FIGURE 2 is a cross-sectional view o~ the novel tamper-indicating alosure;
FIGUXE 3 is a fragmentary, side-elevational view, in partial cross-section illustrating application of the novel closure to the associated container;
FIGURE 4 is a view similar to FIGURE 3 illustrating the closure after application to the associated container, and in a poæition ~or providing a first mode of interPering engagement with the container;
FIGURE 5 is a view similar to FIGURE 4, illustrating the closure in position for effecting a second mode of inter~ering engagement with the associated container;
FIGURES Sa and 6b are views similar to FIGURE
5, further illustrating the second mode of interfering engagement of the closure with the associated container;
FIGURE 7 is a fragmentary, cross-sectional view of a further embodiment of the present tamper-indicating plastic closure, and ~5 FIGURE 8 is a view similar to FIGURE 7 illustrating another embodiment of the present tamper-indicating closure.
FIGURE 9 illustr~tes a further e~bo~; ~nt of a tamper-indicting closure;
FIGURE 10 is a cross-sectional view of the closure illustrated in FIGURE 9; and FIGURE 11 is a ~ragmentary, cross-sectional view taken along lines 11 11 of FIGURE 10.
~etailed Descxiption While the pre~ent invention is ~usceptible of embodiment in various forms, ~here is ~hown in the drawings and will hereinafter be described a presently preferred embodiment, with the understAn~;ng that the present disclosure is to be considered as an exemplification o~ the inven~ion, and is not intended to limit the invention to the specific embodiment illustrated.
With reference first to FIGURE 1, therein is illustrated a plastic closure 10 embodying the principles of the present invention. Closure 10 can be made by various injection-molding or compression-molding techn;ques, and it can be formed in accordance with the compression-molding te~hniques taught in U.S. Patent No.
By this arrangement, two mode~ of interfering interaction, for tamper-indication, are provided between the flexible tab~ and the annular locking ring o~ the container. During application of the closure to the container, the ~lexible tabs are bent upwardly to an out-of-the-way disposition as the pil~er band moves downwardly past the container threads and locking ring.
As the closure is-fully seated on the container, the ~lexible tabs mov~ past the container locking ring, and due to their re~ilient memory, move inwardly to assume an angularly generally upwardly and inwardly disposition relative to the annular band portion. In this disposition of the flexible tab~, they are positioned for interfering engagement with the generally downwardly facing surface of the container locking ring, whereby in this first mode of inter~erence, the free end portions ~f the flexible tabs engage the lo~ki ng ring for ~racturing the franqible ribs which at l~ast partially detachably connect the pilfer band to the skirt portion o~ the closure cap. Clearly visible evidence of opening is thus provided.
In a second mode o~ interfering interaction, the flexible tabs cooperate and coact with the interference bead of the pilfer band to again interferingly engage and coact with the container lo~kin~ ring. In thi6 mode of op~ration, the ~lexible tabs are engageable with the container lo~kinq ring in the event that the flexible tabs assume an angularly downwardly and inwardly ext~n~ing disposition relative to the annular band portion of the pilfer band. In this orientation, the ~lexible tabs are engageable with the container locking ring by disposition between the locking ring and the annular interference bead. The flexible tabs and interference bead are dimensioned relative to the container locking ring so as to r~sist opening muv~ ient of the closure, thereby fracturing the frangible ribs joining the pilfer band to the skirt portion. Again, clear visua~ evidence of opening is 1~ achieved.
In accordance with alternate, illustrated ~ ho~; -nts of the present closure, a scoring bead can be provided which extends circumferentially on the inside surface of the closure, and which desirably acts to support the interior of the closure during formation of the circumferential score whic~ distinguishes the pilfer band from the skirt portion of the closure.
Additionally, at least some of the frangible ribs of the construction can be configured to extend on the inside surface of the pilfer band between adjacent ones of the flexible tabs. Such ribs desirably function to center the pilfer band on the associated container with respect to the locking ring thereof, thus further enhancing tamper resistance. If desired~ a plurality of ~5 circumferentially spaced prestressing projections can be provided on the inside of the pilfer band, with these pro;ections being engageable with the container locking ring for prestressing the frangible ribs joining the pilfer band to the closure skirt portion. This prestressing arrangement can desirably promote failure of the frangible ribs in the intPnfle~ ~nnPr.
Numerous other features and advantages of the present invention will become readily apparent from the following detailed description, the acc ~nying 3S drawings, and the appended claims.
Brief DescriPtion Of The Drawings FIGURE 1 is a side elevational view, in partial cross-sec~ion, of a tamper-indicating plastic closure embodying the principles of the present invention applied to an associated container;
FIGURE 2 is a cross-sectional view o~ the novel tamper-indicating alosure;
FIGUXE 3 is a fragmentary, side-elevational view, in partial cross-section illustrating application of the novel closure to the associated container;
FIGURE 4 is a view similar to FIGURE 3 illustrating the closure after application to the associated container, and in a poæition ~or providing a first mode of interPering engagement with the container;
FIGURE 5 is a view similar to FIGURE 4, illustrating the closure in position for effecting a second mode of inter~ering engagement with the associated container;
FIGURES Sa and 6b are views similar to FIGURE
5, further illustrating the second mode of interfering engagement of the closure with the associated container;
FIGURE 7 is a fragmentary, cross-sectional view of a further embodiment of the present tamper-indicating plastic closure, and ~5 FIGURE 8 is a view similar to FIGURE 7 illustrating another embodiment of the present tamper-indicating closure.
FIGURE 9 illustr~tes a further e~bo~; ~nt of a tamper-indicting closure;
FIGURE 10 is a cross-sectional view of the closure illustrated in FIGURE 9; and FIGURE 11 is a ~ragmentary, cross-sectional view taken along lines 11 11 of FIGURE 10.
~etailed Descxiption While the pre~ent invention is ~usceptible of embodiment in various forms, ~here is ~hown in the drawings and will hereinafter be described a presently preferred embodiment, with the understAn~;ng that the present disclosure is to be considered as an exemplification o~ the inven~ion, and is not intended to limit the invention to the specific embodiment illustrated.
With reference first to FIGURE 1, therein is illustrated a plastic closure 10 embodying the principles of the present invention. Closure 10 can be made by various injection-molding or compression-molding techn;ques, and it can be formed in accordance with the compression-molding te~hniques taught in U.S. Patent No.
4,497,76S, which is incorporated herein by r~ference.
As illustrated, closure 10 includes an upper generally cup-shaped closure cap 12 including a circular top wall portion 14, and a depenfl;ng, annular cylindrical skirt portion 16. Skirt portion 16 preferably includes an internal thread formation 18 configured for thre~ing engagement in cooperation with tha threads T of an associa~ed container C to which the closure is fitted. If desired, the plastic closure can be provided with an associated sealing liner, such as illustrated in the above-referenced patent.
The present closure ~urther includes an annular pilfer band 20 dep~n~ln~ from and at least partially detachably connected to skirt portion 16 of the closure cap. Pilfer band 20 preferably comprises a continuous annular band portion 22 arranged in substantial vertical alignment with ~kirt portion 16.
In the preferred embodiment~ the pil~er band is at least partially detachably connected to the skirt portion by a plurality o~ circumferentially spaced ~rangible ri~s 24 which extend between the inside surfaces o~ the skirt portion 16 and the band portion 22 of the pil~er band.
As shown, the pilfer band 20 is otherwise distin~; ~he~
and separated from the skirt portion 16 by a circumferentially ext~n~ing score line 26.
In accordance with the teachings o~ U.S.
Patent No. 4,418,828, incorporated herein by reference, score line 26 and frangible rib 24 together cooperate to provide the desired frangible cnnnection between the pilfer band 20 and the closure cap 12. Specifically, the closure cap 12 and the pilfer band 20 are formed integrally with each other during molding, with the ribs 24 molded on the inside surfaces of the skirt portion and pilfer band. Thereafker, score line 26 is formed, preferably by use of a scoring cutting blade, thereby distin~lishing and separating the pilfer band 20 from the skirt portion 16, with the score line 26 ext~n~; ng partially into the ribs 24.
By this arrangement, the unscored, 'iresidual"
portions of the frangible ribs 24 collectively provide the desired frangible connection between the pilfer band and the skirt portion. If desired, an integral connector portion can be provided between the pilfer band and the skirt portion (such as by leaving a portion ~5 of the closure uncut by score line 26) whereby the pilfer band rPr-inR connected to the sXirt portion 16 after fracture of the ribs. In conjunction with such a connector portion, one or more fracturable areas can be provided in the pilfer band itself, whereby the pilfer 3~ band 6plits and fractures during closure removal from the associated container.
Referring now to the configuration of the pilfer band 20, the present closure has been specifically configured to provide a very high degree of tamper resistance, and in particular provides two ~ 3~J~
distinct and separate modes of interfering interaction with the associa~ed con~ainer. To this end, the pilfer band includ~s a plu~ality of circ~mferentially spaced, inwardly ext~n~;ng flexible tabs 28 which extend inwardly from the annular band portion ~2 of the pilfer band. In a current embo~i ?~t, twelve evenly spaced tabs 28 are provided about the circumference of the pilfer band, with each tab having a width of about 0.240 inches, and a thickness of between about 0.012 inches and O.U20 inches. By this arrangement, the free end portions of adjacent ones of the tabs 28 axe closely spaced ~about 0O020 inch spacing) when the tabs extend horizontally inwardly. ~his horizontally inwardly exten~i ng orientation of the tabs is indicated in phantom line, and represents the orientation in which the flexible tabs 28 are preferably molded.
As will be further described, the flexible tabs 28 cooperate with an annular locking ring portion L
of container C for effecting fracture of frangible ribs 24, thereby providing the desired tamper-indication. In a first mode of interference and failure, the free end portions of the flexible tabs are engageable with the locking ring I,. In a second mode of failure, the flexible tabs are configured to cooperate with an ~5 annular interference bead 30 provided generally at the lower edge of annular band portion 22 of the pilfer band 20. To this end, the interference bead 30 is po~itioned beneath the flexible tabs 28, with the upper, inward edge portion of the interference bead positioned relative to the flexible tabs so that this edge portion is engaged by the tabs in the second failure mode. In the preferred form, the inside diameter of the interference bead is about equal to or slightly less than an inside diameter collectively defined by the ;~$~7~
g inside surfaces of tha circumferentially spaced frangible ribs 24.
Referring now to FIGURE 3, the function o~ the present closure will be described. During application of the closure 10 to the associated container, the flexible tabs 28 engage the container C and are mov~d upuardly generally to an upwardly exte~in~, out-o~-the~
way disposition as the pilfer band moves downwardly relative to the container threads T and the container 1~ locking ring ~. To this end, the flexible tabs 28 are preferably provided with a thickness about equal to the radial dimension o the frangible ribs 24, or the tabs 28 are otherwise configurad to collectively define an inside diameter about equal to an insi~e diameter lS collectively defined by the ribs 24.
When the closure is fully seated on the container, the flexible tabs 28 have moved past the container lock; n~ ring L, and thereafter, due to the resilient memory of the plastic, assume a generally angularly upwardly and inwardly exten~;ng disposition, as illustrated in FIGURE 4. The flexible tabs 28 are now in position for the first mode of interfering interaction and ~ailure in cooperation with the container locking ring. Specifically, unscrewing upward ~5 movement of the closure 10 relative to the container urges the generally upwardly ~xten~in~ flexible tabs 28 into and against the container locking ring L. This interfering engagement ~ith the ~ontainer locking ring acts to resist the upward unscrewing movement of the closure, thereby stressing and fracturing the frangible ribs 24. ~racture of the ribs ~4 results in clearly visibly ~iscernable separation of the pilfer band 20 from the skirt portion 16, thus providing a clear indication of opening of the container.
.:
In a current embodiment, each flexible tab 2 is of a generally planar confi~ura~ion, having a thickness ~i -n~ioned between a~out 0.012 inches and 0.020 inches. However, as will ke appreciated, each flexible tab 28 is preferably dimensioned and configured for sufficisnt thickness, in the direction from its free end to its base integral with the band portion 22, so as to exhibit sufficient resistance to collapse or deformation to thereby provide the desired interfering interaction with locking band L. To this end, each of the ~abs 28 may be of a non-planar configuration, such as being slightly curved when viewed in cross-section perpendicular to the length of each tab, or similarly, of a generally angled or compound con~iguration when similarly viewed. As will be appreciated, such arrangements can act to enh~nce the "column strength" of aach flexible tab for providing the desired interfering engagement with locki n~ ring L.
In accordance with the present invention, the flexible ~abs ~8 are configured for cooperation with interference bead 30 to provide a second and distinct mode of interfering engagement with the container locking ring L. In the event that the flexible tabs 28 are moved from their angularly upwardly and inwardly ~5 disposition (such as by unauthorized manipulation or the like, which is desirably inhibited by the inwardly exte~;ng bead 30) the flexible tab~ will assume an angularly downwardly and inwardly ext~n~i ng disposition~
as illustrated in FIGURE 5. In this orientation of the tabs, the tabs are positioned for engagement with the container lock~ng ring L by disposition between khe container locking ring and the upper inward edge o~ the interference bead 30. In this -nner~ the tab~
cooperate and coact with the inter~erence bead to again provide interfering interaction with the container locking ring, to thereby fracture frangible ribs 24 for at least partially detaching the pilfer band 20 ~rom the skirt portion 16. This action is illustrated in FIGURES
6a and 6b, where in FIGURE 6a, a flexible tab 28 i6 illustrated between the locking ring L and the interference bead 30, with FI~URE 6b illustrating the subseguent failure of frangible rib 24 and separation along score line 26.
Rererring now to FIGURE 7, therein is illustrated an al~erna~e embo~i -n~ of the pre~ent tamper-indicat~ng closureO In most respects, this ambodiment is the same as the previously described ho~i ^nt, although it will be noted that th~ closure illustrated in FIGURE 7 shows the provision of a sealing liner 15 adjacent to top wall portion 14, and a vent groove 17 traversing the internal thread formation 18, with the vent groove 17 exte~ing into the cylindrical skirt portion ~6 of the closure. The provision of one or more vent grooves 17 facilitates venting of gas pressure, atten~nt to closure ~, val, when the present closure is used in connection with a container having carbonated contents or the like.
As in the previous embodiment, the closure 10 includes a pilfer band 20 which is distinguished and at least partially separated from the skirt portion 16 by a circumferential score 26. Moreover, the pilfer band 20 includes a plurality (twelve being presently preferred) of circum~erentially spaced, inwardly extPn~i~g flexible tabs 28, again configured to provide a dual ~ode o~
interference with the locking ring o~ an associated container. To this end, zn inwardly exten~ing interference bead 30 i8 positioned beneath the flexible tabs 28, with the tabs 28 being engageable with the inter~erence bead 30 in the second mode of interaction o~ the closure with an associated container.
In this embo~ t, khe frangible connection between the pilfer band ~0 and the ~kirt portion 16 is provided by a plurality of circumferentially ~paced, frangible ribs 124 which extend between the inside surfaces of the skirt portion and the pilfer band.
Significantly, at least some of the frangible ribs 124 extend on the inside surface of the band portion 22 of the pilfer band 20 between adjacent ones of the ~lexible tabs 28. In the illustrated embodiment, each of the illustrated frangible ribs 124 is so configured.
This configuration of the frangible ribs 124 desirably acts to center the pilfer band 20 on the associated container C with respect to the container locking ring ~. By virtue of this configuration of the frangible ribs 124, a very li~ited amount of clearance is provided between the container locki ng ring L and the inwardly facing surfaces of the frangible ribs 124 when the closure 10 is fully seated on the associated container. This desirably acts to enhance tamper-resistance since the frangible ribs 124 thus act toprevent deformation of ~he pilfer band ~o an out-of-round configuration, thus substantially precluding removal of the pilfer band from the associated container without at~en~nt fracture of the frangible ribs 124.
~5 Like the frangible ribs 24 of the previous embo~i ?nt~
ribs 124 are rendered fracturable by virtue of thP score line 26 partially extPn~ing into at least some of the ribs.
In the embodiment of FIGUR~ 7, an arrangement is provided to facilitate efficient and accurate formation of the score line 26. 5pecifically, this embo~; -nt includes a circumferentially exte~ing scoring bead 127 on the inside o~ ~he closure, wi~h the scoring bead 127 preferably ext~n~i ng continuously along the inside of thQ closure, and with circumferential ~cor~ line 26 positioned beneath the scoring bead.
During scoring of the present closure, a scoring mandrel inserted into the closure is preferably employed, with a scoring knife or the like then applied to the exterior surface o~ the closure. For high-speed ~anufacture, it is presently preferred that position of the scoring knife be referenced relative to the interioxly-positioned scoring mandrel.
1~ Accordingly, it is desirable to have the closure remain in a sub~tantially fixed position on the scoring mandrel, without excessive deformation or deflection duxing scoring. Otherwise, inaccurate scoring may result.
Thus, the scoring bead 127 is configured to securely engage and seat against the scoring mandr21, whereby highly e~ficient and accurate formation of the score line 26, with the desired degree of partial cutting of the frangible rib 124, is readily accomplished.
As in the previous embodiment, the flexible tabs 28 are preferably provided with a thickness about equal to the radial di -nRion of frangible ribs 1~4.
This preferred di~ensional relation permits the tabs ~8 to desirably support the interior of the closure during scoring (when the tabs 28 are flexed upwardly against the inside surface of the closure) in absence of the scoring bead 127.
Efficient and accurate ~coring is furth~r facilitated by the dispositlon of the frangible ribs 124 between adjacent ones of the tabs 128. By this arrangement, any possible overlap of one of the tabs 12 with an adjacent frangible rib (such as by deformation and elongation of a flexible tab att~ nt to ejection from its molding apparatus) is avoided. Additionally, pfs~ t~
this ex~n~e~ configuration of ~he frangible ribs 124 permits th~ score line 26 to be positioned relatively close to the bottom edge of the pil~er band 20, which has been found to desirably ènhance the tamper-resîstance of the pre~ent closure, 6ince anyunauthorized manipulation or other tampering is more lik~ly to result in fracture of one or more of the ~rangible ribs 124.
A further feature of the embodiment of FIGURE
7 concerns the formation of each of the ~rangible ribs 124 with an upper portion 125 which extends on the inside surface of skirt portion 16 above scoring bead 127. This configuration of the frangible ribs has been found to desirably enhance the colu~nar strength of the overall closure, which facilitates high-speed ejection fro~ ~he associated molding apparatus.
Referring now to FIGURE 8 t therein is illustrated a further alternate embodiment of the present closure. In most respects, this embo~i -nt is like that described above and illustrated in FIGURE 7, although the embodiment of Figure 8 does not include a scoring bead 127. The absence of the ~coring bead, together with the extended configuration of frangible ribs 124 (with upper portions 125) can enhance the gas ventin~ characteristics of the closure~
~ wo additional features of the emho~i ?nt of FIGURE 8 should be noted. First, thi~ embodiment of the present tamper-indicating closure includes an arrangement for prestressing the frangible connection between the pilfer band 20 and the ~kirt portion 16 provided by the frangible ribs 124. Speci~ically, a plurality of circumferentially ~paced, prestressing projections 131 are pro~ided on the inside surface of the band portion 20 of the pilfer band. In the illustrated embodimentO and in accordance with the ~ ~ kJ ~ j 9 -- 1~
preferred configura~ion, the~e prestressing projections 131 are each positioned on a re pective one of the frangible ribs 124. In the illustrated embodiment, the prestressing projections 131 are provided on alternate ones of the frangible ribs 124, but a fewer or greater nu~ber of the projections 131 can be similarly provided.
Projections 131 can be provided to prestress the frangible ribs 124 atten~nt to both application and re~oval of the closure. During application of the closure to the ae~ociated container, the projections 131 are engageable with the container locking ring L, thus acting to ~rA~ and ~bell out" the pil~er band 20 att~n~nt to application. This action can act to weaken the unscored, residual portion of each ~rangible rib 124, thereby facilitating failur2 of the frangible ribs in the intended manner during closure removal.
Additionally, the prestressing projections 131 can cooperate with the locking ring ~ during closure removal. In particular, this can occur in conjuncti.on with stressing and fracture of the ribs ~24 when tabs 28 extend angularly downwardly, and are positioned between the container locking ring L and interference bead 30.
Att~nd~nt to this action, the projections 131 provide additional interference with ~he container locking ring, ~5 thus desirably subjecting the ~rangible ribs 124 to additional ~tress to assure fracture and failure of the ribs.
A further ~eature of the embodiment o FIGURE
8 concerns configuriny the pilfer band 20 ~or fracture of the band portion 22, which is ordinarily desired, as discussed above, in conjunction with the provision of an unscored connector portion which integrally joins ~he pilfer band to the skirt portion 16 after fracture of ribs 12~. By such an arrangement, the pilfer band :
J~?~
rf -in~ joined to, but par~ially detached from, the skirt portion 16.
To this end, FIGURE 8 illustrates the manner in which a vertical score is preferably formed in the pilfer band 20. Speci~ically, an external ~coring knife is preferably applied to the pilfer band so as to form one or more scores extending to a depth as illustrated in phantom line at 133. Preferably, ~uch vertical scoring is provided between one of ~he ~lexible tabs 28 1~ and an adjacent frangible rib 124, so that such vertical scoring does nok extend into either the tab 28 or the rib 124.
Notably, it is preferred that the verti~al scoring extend partially, but not completely, into the interference bead 30, to thereby define a fracturable residual portion 135 of the pil~er band. This arxangement preserves a desired degree of strength in ~he pilfer band, to facilitate high-speed application, while still rendering the pilfer band fracturable in the intended manner.
Thus, a high degree of tamper-resistance is provided by the present closure. As will be appreciated, various modifications and departures from the illustrated embo~ t can be effected. For example, ~he number, spacing, thicknç~, and configuration of the flexible tabs 28 can be varied and selected while keeping with the principles disclosed herein. Similarly, while the annular interference bead 30 is preferably substantially continuou~ in nature for providing additional circumferential hoop strength ~or the closure, segmented or otherwi6e discontinuous con~igurations for the interference bead can be alternately employed. Moreover, w~ile ~he present invention has been illustrated in the form of a one-piece, all plastic closure, it will be appreciated that .
a closure embQdying the present invention may be composi~e in nature, such as a combination metallic and plastic closure (with or without a separate s~aling liner).
Referring now to FIGURES 9-11, therein is illustrated a further embodiment of tamper-indicating plastic closure 10~ In accordance with previous --ho~ ~nts, this plastic closure 10 includes a cup-like closure cap 12 having a circular top wall portion 14, and a depPn~lng annular or cylindrical skirt portion 16 having an internal thread formation 18. As shown in FIGURE 9, closure 10 is inten~e~ to be applied to an associated container C having an external bead-like locking ring L which extends circum~erentially of the neck portion of the container perpendicular to the vertical axis thereof. Locking ring ~ is positioned just beneath external container threads T, with the container C including a hand grip or handle H.
In this embodiment, the closure includes ~n annular pilfer band 20 depPn~ing ~rom skirt portion 16 which is at least partially detachably connected to the skirt portion by a plurality of circumferentially spaced apart fracturable bridges 220 The fracturable bridges can alternately be provided generally along the inner surfaces of the pilfer band and skirt portion, such as disclosed in U.S. Patent No. 4,418,828.
Pilfer band 20 includes an annular, bead-like interfarence lip 24 extending circumferentially about the inner surface of the pilfer band 20. Notably, interference lip 24 does not extend perpendicularly to the vertical axis of closure 10, but rathar extends in a plane arranged at an acute angle relative to the vertical axis of the closure. In the pre~erred form, this plane is arranged at an acu~e angle in the range of about 1 degree to about 5 degrees relative to the . .
closure axis. While th~ in~er~erence lip as shown is ext~n~ing continuously about the inner surface o~ the pilfer band 20, it should be recognized that the lip 24 may be otherwise confi~ured, 60 as to extend discontinually about the inner surface ~uch as by the provision of a series of seyments, lugs, or lik~
projections. Whether the interference lip 24 is of a continuous or discontinuous configuration, it is eontemplated that the lip extends in a skewed or non-perpandicular relationship to the vertical axis of theclosure.
By virtue of the skewed configuration of the interference lip 24 with respect to the closure axis, non-circular engagement is created between the interference lip and the locXing ring L of the container duriny application and removal of the closure.
~on~equently~ stresses created on the closure, are non-uniform about the circumference of the closure.
During application, this non-uniform stressing desirably results in the deformation of the pilfer band 20 to an out-of-round, non-circular configuration, i.e., to a generally elliptical or oval shape. ~his de~ormation in the pilfer band facilitates movement of the interference lip past the locking ring L during application of the closure to the container, thereby reducing the ~orce required for application and minimizing stresses created on fracturable bridges 22.
During closure removal, the interference lip 24 again coop~rated with the containsr locking ring ~ to create a non-uniform stressing of the pilfer band 20, and in particular provide a progressive stressing of fracturable bridges 22. During closure removal, that portion of the interference lip ~ closest to the top wall portion 12 of the closure first engages the locking ring L of the container. This results in localized stressing in the r~gion of thi6 initial engagement. In ~his manner, progressi~e failure of the bridges 22 can be induced.
In order to prevent the interference lip 24 from slipping over the locking xing L without failure of bridges 22 during closure . ~val, it is desirable to provide means for preventing the pilfer band 22 from assuming a non-circular configuration. To this end, a plurality of circumfexentially spaced centering ribs 26 are provided on the inside surface of pilfer band 20 abova interference lip 24. centering ribs 26 are positioned to engage the container locking ring L during closure removal, and thus maintain the pilfer band in a circular configuration.
As will be appreciated, other suitable forms of centering means can be employed, such as by the provision of a continuous ~ing on the interior of the closure, or by the provision of an area of relatively reduced inside diameter just above the interference lip.
In essence, it is contemplated that a centering arrangement be provided for engagement with lock;n~ ring L as the interference lip 24 engages the locking ring, to thereby prevent the pilfer band from assuming a non-circular configuration, thus assuring the int~n~e~
fracture of bridges 22.
From the foregoing, it will be observed that numerous modifications and variations can be effected without departing from the true spirit and scope of the novel concept of the present invention. It is to be understood that no limitation with respect ~o the specific embodiments is intended or should be inferred~
The disclosure i~ inte~e~ to cover by the appended claims all such modifications as fall within the score of the claims.
As illustrated, closure 10 includes an upper generally cup-shaped closure cap 12 including a circular top wall portion 14, and a depenfl;ng, annular cylindrical skirt portion 16. Skirt portion 16 preferably includes an internal thread formation 18 configured for thre~ing engagement in cooperation with tha threads T of an associa~ed container C to which the closure is fitted. If desired, the plastic closure can be provided with an associated sealing liner, such as illustrated in the above-referenced patent.
The present closure ~urther includes an annular pilfer band 20 dep~n~ln~ from and at least partially detachably connected to skirt portion 16 of the closure cap. Pilfer band 20 preferably comprises a continuous annular band portion 22 arranged in substantial vertical alignment with ~kirt portion 16.
In the preferred embodiment~ the pil~er band is at least partially detachably connected to the skirt portion by a plurality o~ circumferentially spaced ~rangible ri~s 24 which extend between the inside surfaces o~ the skirt portion 16 and the band portion 22 of the pil~er band.
As shown, the pilfer band 20 is otherwise distin~; ~he~
and separated from the skirt portion 16 by a circumferentially ext~n~ing score line 26.
In accordance with the teachings o~ U.S.
Patent No. 4,418,828, incorporated herein by reference, score line 26 and frangible rib 24 together cooperate to provide the desired frangible cnnnection between the pilfer band 20 and the closure cap 12. Specifically, the closure cap 12 and the pilfer band 20 are formed integrally with each other during molding, with the ribs 24 molded on the inside surfaces of the skirt portion and pilfer band. Thereafker, score line 26 is formed, preferably by use of a scoring cutting blade, thereby distin~lishing and separating the pilfer band 20 from the skirt portion 16, with the score line 26 ext~n~; ng partially into the ribs 24.
By this arrangement, the unscored, 'iresidual"
portions of the frangible ribs 24 collectively provide the desired frangible connection between the pilfer band and the skirt portion. If desired, an integral connector portion can be provided between the pilfer band and the skirt portion (such as by leaving a portion ~5 of the closure uncut by score line 26) whereby the pilfer band rPr-inR connected to the sXirt portion 16 after fracture of the ribs. In conjunction with such a connector portion, one or more fracturable areas can be provided in the pilfer band itself, whereby the pilfer 3~ band 6plits and fractures during closure removal from the associated container.
Referring now to the configuration of the pilfer band 20, the present closure has been specifically configured to provide a very high degree of tamper resistance, and in particular provides two ~ 3~J~
distinct and separate modes of interfering interaction with the associa~ed con~ainer. To this end, the pilfer band includ~s a plu~ality of circ~mferentially spaced, inwardly ext~n~;ng flexible tabs 28 which extend inwardly from the annular band portion ~2 of the pilfer band. In a current embo~i ?~t, twelve evenly spaced tabs 28 are provided about the circumference of the pilfer band, with each tab having a width of about 0.240 inches, and a thickness of between about 0.012 inches and O.U20 inches. By this arrangement, the free end portions of adjacent ones of the tabs 28 axe closely spaced ~about 0O020 inch spacing) when the tabs extend horizontally inwardly. ~his horizontally inwardly exten~i ng orientation of the tabs is indicated in phantom line, and represents the orientation in which the flexible tabs 28 are preferably molded.
As will be further described, the flexible tabs 28 cooperate with an annular locking ring portion L
of container C for effecting fracture of frangible ribs 24, thereby providing the desired tamper-indication. In a first mode of interference and failure, the free end portions of the flexible tabs are engageable with the locking ring I,. In a second mode of failure, the flexible tabs are configured to cooperate with an ~5 annular interference bead 30 provided generally at the lower edge of annular band portion 22 of the pilfer band 20. To this end, the interference bead 30 is po~itioned beneath the flexible tabs 28, with the upper, inward edge portion of the interference bead positioned relative to the flexible tabs so that this edge portion is engaged by the tabs in the second failure mode. In the preferred form, the inside diameter of the interference bead is about equal to or slightly less than an inside diameter collectively defined by the ;~$~7~
g inside surfaces of tha circumferentially spaced frangible ribs 24.
Referring now to FIGURE 3, the function o~ the present closure will be described. During application of the closure 10 to the associated container, the flexible tabs 28 engage the container C and are mov~d upuardly generally to an upwardly exte~in~, out-o~-the~
way disposition as the pilfer band moves downwardly relative to the container threads T and the container 1~ locking ring ~. To this end, the flexible tabs 28 are preferably provided with a thickness about equal to the radial dimension o the frangible ribs 24, or the tabs 28 are otherwise configurad to collectively define an inside diameter about equal to an insi~e diameter lS collectively defined by the ribs 24.
When the closure is fully seated on the container, the flexible tabs 28 have moved past the container lock; n~ ring L, and thereafter, due to the resilient memory of the plastic, assume a generally angularly upwardly and inwardly exten~;ng disposition, as illustrated in FIGURE 4. The flexible tabs 28 are now in position for the first mode of interfering interaction and ~ailure in cooperation with the container locking ring. Specifically, unscrewing upward ~5 movement of the closure 10 relative to the container urges the generally upwardly ~xten~in~ flexible tabs 28 into and against the container locking ring L. This interfering engagement ~ith the ~ontainer locking ring acts to resist the upward unscrewing movement of the closure, thereby stressing and fracturing the frangible ribs 24. ~racture of the ribs ~4 results in clearly visibly ~iscernable separation of the pilfer band 20 from the skirt portion 16, thus providing a clear indication of opening of the container.
.:
In a current embodiment, each flexible tab 2 is of a generally planar confi~ura~ion, having a thickness ~i -n~ioned between a~out 0.012 inches and 0.020 inches. However, as will ke appreciated, each flexible tab 28 is preferably dimensioned and configured for sufficisnt thickness, in the direction from its free end to its base integral with the band portion 22, so as to exhibit sufficient resistance to collapse or deformation to thereby provide the desired interfering interaction with locking band L. To this end, each of the ~abs 28 may be of a non-planar configuration, such as being slightly curved when viewed in cross-section perpendicular to the length of each tab, or similarly, of a generally angled or compound con~iguration when similarly viewed. As will be appreciated, such arrangements can act to enh~nce the "column strength" of aach flexible tab for providing the desired interfering engagement with locki n~ ring L.
In accordance with the present invention, the flexible ~abs ~8 are configured for cooperation with interference bead 30 to provide a second and distinct mode of interfering engagement with the container locking ring L. In the event that the flexible tabs 28 are moved from their angularly upwardly and inwardly ~5 disposition (such as by unauthorized manipulation or the like, which is desirably inhibited by the inwardly exte~;ng bead 30) the flexible tab~ will assume an angularly downwardly and inwardly ext~n~i ng disposition~
as illustrated in FIGURE 5. In this orientation of the tabs, the tabs are positioned for engagement with the container lock~ng ring L by disposition between khe container locking ring and the upper inward edge o~ the interference bead 30. In this -nner~ the tab~
cooperate and coact with the inter~erence bead to again provide interfering interaction with the container locking ring, to thereby fracture frangible ribs 24 for at least partially detaching the pilfer band 20 ~rom the skirt portion 16. This action is illustrated in FIGURES
6a and 6b, where in FIGURE 6a, a flexible tab 28 i6 illustrated between the locking ring L and the interference bead 30, with FI~URE 6b illustrating the subseguent failure of frangible rib 24 and separation along score line 26.
Rererring now to FIGURE 7, therein is illustrated an al~erna~e embo~i -n~ of the pre~ent tamper-indicat~ng closureO In most respects, this ambodiment is the same as the previously described ho~i ^nt, although it will be noted that th~ closure illustrated in FIGURE 7 shows the provision of a sealing liner 15 adjacent to top wall portion 14, and a vent groove 17 traversing the internal thread formation 18, with the vent groove 17 exte~ing into the cylindrical skirt portion ~6 of the closure. The provision of one or more vent grooves 17 facilitates venting of gas pressure, atten~nt to closure ~, val, when the present closure is used in connection with a container having carbonated contents or the like.
As in the previous embodiment, the closure 10 includes a pilfer band 20 which is distinguished and at least partially separated from the skirt portion 16 by a circumferential score 26. Moreover, the pilfer band 20 includes a plurality (twelve being presently preferred) of circum~erentially spaced, inwardly extPn~i~g flexible tabs 28, again configured to provide a dual ~ode o~
interference with the locking ring o~ an associated container. To this end, zn inwardly exten~ing interference bead 30 i8 positioned beneath the flexible tabs 28, with the tabs 28 being engageable with the inter~erence bead 30 in the second mode of interaction o~ the closure with an associated container.
In this embo~ t, khe frangible connection between the pilfer band ~0 and the ~kirt portion 16 is provided by a plurality of circumferentially ~paced, frangible ribs 124 which extend between the inside surfaces of the skirt portion and the pilfer band.
Significantly, at least some of the frangible ribs 124 extend on the inside surface of the band portion 22 of the pilfer band 20 between adjacent ones of the ~lexible tabs 28. In the illustrated embodiment, each of the illustrated frangible ribs 124 is so configured.
This configuration of the frangible ribs 124 desirably acts to center the pilfer band 20 on the associated container C with respect to the container locking ring ~. By virtue of this configuration of the frangible ribs 124, a very li~ited amount of clearance is provided between the container locki ng ring L and the inwardly facing surfaces of the frangible ribs 124 when the closure 10 is fully seated on the associated container. This desirably acts to enhance tamper-resistance since the frangible ribs 124 thus act toprevent deformation of ~he pilfer band ~o an out-of-round configuration, thus substantially precluding removal of the pilfer band from the associated container without at~en~nt fracture of the frangible ribs 124.
~5 Like the frangible ribs 24 of the previous embo~i ?nt~
ribs 124 are rendered fracturable by virtue of thP score line 26 partially extPn~ing into at least some of the ribs.
In the embodiment of FIGUR~ 7, an arrangement is provided to facilitate efficient and accurate formation of the score line 26. 5pecifically, this embo~; -nt includes a circumferentially exte~ing scoring bead 127 on the inside o~ ~he closure, wi~h the scoring bead 127 preferably ext~n~i ng continuously along the inside of thQ closure, and with circumferential ~cor~ line 26 positioned beneath the scoring bead.
During scoring of the present closure, a scoring mandrel inserted into the closure is preferably employed, with a scoring knife or the like then applied to the exterior surface o~ the closure. For high-speed ~anufacture, it is presently preferred that position of the scoring knife be referenced relative to the interioxly-positioned scoring mandrel.
1~ Accordingly, it is desirable to have the closure remain in a sub~tantially fixed position on the scoring mandrel, without excessive deformation or deflection duxing scoring. Otherwise, inaccurate scoring may result.
Thus, the scoring bead 127 is configured to securely engage and seat against the scoring mandr21, whereby highly e~ficient and accurate formation of the score line 26, with the desired degree of partial cutting of the frangible rib 124, is readily accomplished.
As in the previous embodiment, the flexible tabs 28 are preferably provided with a thickness about equal to the radial di -nRion of frangible ribs 1~4.
This preferred di~ensional relation permits the tabs ~8 to desirably support the interior of the closure during scoring (when the tabs 28 are flexed upwardly against the inside surface of the closure) in absence of the scoring bead 127.
Efficient and accurate ~coring is furth~r facilitated by the dispositlon of the frangible ribs 124 between adjacent ones of the tabs 128. By this arrangement, any possible overlap of one of the tabs 12 with an adjacent frangible rib (such as by deformation and elongation of a flexible tab att~ nt to ejection from its molding apparatus) is avoided. Additionally, pfs~ t~
this ex~n~e~ configuration of ~he frangible ribs 124 permits th~ score line 26 to be positioned relatively close to the bottom edge of the pil~er band 20, which has been found to desirably ènhance the tamper-resîstance of the pre~ent closure, 6ince anyunauthorized manipulation or other tampering is more lik~ly to result in fracture of one or more of the ~rangible ribs 124.
A further feature of the embodiment of FIGURE
7 concerns the formation of each of the ~rangible ribs 124 with an upper portion 125 which extends on the inside surface of skirt portion 16 above scoring bead 127. This configuration of the frangible ribs has been found to desirably enhance the colu~nar strength of the overall closure, which facilitates high-speed ejection fro~ ~he associated molding apparatus.
Referring now to FIGURE 8 t therein is illustrated a further alternate embodiment of the present closure. In most respects, this embo~i -nt is like that described above and illustrated in FIGURE 7, although the embodiment of Figure 8 does not include a scoring bead 127. The absence of the ~coring bead, together with the extended configuration of frangible ribs 124 (with upper portions 125) can enhance the gas ventin~ characteristics of the closure~
~ wo additional features of the emho~i ?nt of FIGURE 8 should be noted. First, thi~ embodiment of the present tamper-indicating closure includes an arrangement for prestressing the frangible connection between the pilfer band 20 and the ~kirt portion 16 provided by the frangible ribs 124. Speci~ically, a plurality of circumferentially ~paced, prestressing projections 131 are pro~ided on the inside surface of the band portion 20 of the pilfer band. In the illustrated embodimentO and in accordance with the ~ ~ kJ ~ j 9 -- 1~
preferred configura~ion, the~e prestressing projections 131 are each positioned on a re pective one of the frangible ribs 124. In the illustrated embodiment, the prestressing projections 131 are provided on alternate ones of the frangible ribs 124, but a fewer or greater nu~ber of the projections 131 can be similarly provided.
Projections 131 can be provided to prestress the frangible ribs 124 atten~nt to both application and re~oval of the closure. During application of the closure to the ae~ociated container, the projections 131 are engageable with the container locking ring L, thus acting to ~rA~ and ~bell out" the pil~er band 20 att~n~nt to application. This action can act to weaken the unscored, residual portion of each ~rangible rib 124, thereby facilitating failur2 of the frangible ribs in the intended manner during closure removal.
Additionally, the prestressing projections 131 can cooperate with the locking ring ~ during closure removal. In particular, this can occur in conjuncti.on with stressing and fracture of the ribs ~24 when tabs 28 extend angularly downwardly, and are positioned between the container locking ring L and interference bead 30.
Att~nd~nt to this action, the projections 131 provide additional interference with ~he container locking ring, ~5 thus desirably subjecting the ~rangible ribs 124 to additional ~tress to assure fracture and failure of the ribs.
A further ~eature of the embodiment o FIGURE
8 concerns configuriny the pilfer band 20 ~or fracture of the band portion 22, which is ordinarily desired, as discussed above, in conjunction with the provision of an unscored connector portion which integrally joins ~he pilfer band to the skirt portion 16 after fracture of ribs 12~. By such an arrangement, the pilfer band :
J~?~
rf -in~ joined to, but par~ially detached from, the skirt portion 16.
To this end, FIGURE 8 illustrates the manner in which a vertical score is preferably formed in the pilfer band 20. Speci~ically, an external ~coring knife is preferably applied to the pilfer band so as to form one or more scores extending to a depth as illustrated in phantom line at 133. Preferably, ~uch vertical scoring is provided between one of ~he ~lexible tabs 28 1~ and an adjacent frangible rib 124, so that such vertical scoring does nok extend into either the tab 28 or the rib 124.
Notably, it is preferred that the verti~al scoring extend partially, but not completely, into the interference bead 30, to thereby define a fracturable residual portion 135 of the pil~er band. This arxangement preserves a desired degree of strength in ~he pilfer band, to facilitate high-speed application, while still rendering the pilfer band fracturable in the intended manner.
Thus, a high degree of tamper-resistance is provided by the present closure. As will be appreciated, various modifications and departures from the illustrated embo~ t can be effected. For example, ~he number, spacing, thicknç~, and configuration of the flexible tabs 28 can be varied and selected while keeping with the principles disclosed herein. Similarly, while the annular interference bead 30 is preferably substantially continuou~ in nature for providing additional circumferential hoop strength ~or the closure, segmented or otherwi6e discontinuous con~igurations for the interference bead can be alternately employed. Moreover, w~ile ~he present invention has been illustrated in the form of a one-piece, all plastic closure, it will be appreciated that .
a closure embQdying the present invention may be composi~e in nature, such as a combination metallic and plastic closure (with or without a separate s~aling liner).
Referring now to FIGURES 9-11, therein is illustrated a further embodiment of tamper-indicating plastic closure 10~ In accordance with previous --ho~ ~nts, this plastic closure 10 includes a cup-like closure cap 12 having a circular top wall portion 14, and a depPn~lng annular or cylindrical skirt portion 16 having an internal thread formation 18. As shown in FIGURE 9, closure 10 is inten~e~ to be applied to an associated container C having an external bead-like locking ring L which extends circum~erentially of the neck portion of the container perpendicular to the vertical axis thereof. Locking ring ~ is positioned just beneath external container threads T, with the container C including a hand grip or handle H.
In this embodiment, the closure includes ~n annular pilfer band 20 depPn~ing ~rom skirt portion 16 which is at least partially detachably connected to the skirt portion by a plurality of circumferentially spaced apart fracturable bridges 220 The fracturable bridges can alternately be provided generally along the inner surfaces of the pilfer band and skirt portion, such as disclosed in U.S. Patent No. 4,418,828.
Pilfer band 20 includes an annular, bead-like interfarence lip 24 extending circumferentially about the inner surface of the pilfer band 20. Notably, interference lip 24 does not extend perpendicularly to the vertical axis of closure 10, but rathar extends in a plane arranged at an acute angle relative to the vertical axis of the closure. In the pre~erred form, this plane is arranged at an acu~e angle in the range of about 1 degree to about 5 degrees relative to the . .
closure axis. While th~ in~er~erence lip as shown is ext~n~ing continuously about the inner surface o~ the pilfer band 20, it should be recognized that the lip 24 may be otherwise confi~ured, 60 as to extend discontinually about the inner surface ~uch as by the provision of a series of seyments, lugs, or lik~
projections. Whether the interference lip 24 is of a continuous or discontinuous configuration, it is eontemplated that the lip extends in a skewed or non-perpandicular relationship to the vertical axis of theclosure.
By virtue of the skewed configuration of the interference lip 24 with respect to the closure axis, non-circular engagement is created between the interference lip and the locXing ring L of the container duriny application and removal of the closure.
~on~equently~ stresses created on the closure, are non-uniform about the circumference of the closure.
During application, this non-uniform stressing desirably results in the deformation of the pilfer band 20 to an out-of-round, non-circular configuration, i.e., to a generally elliptical or oval shape. ~his de~ormation in the pilfer band facilitates movement of the interference lip past the locking ring L during application of the closure to the container, thereby reducing the ~orce required for application and minimizing stresses created on fracturable bridges 22.
During closure removal, the interference lip 24 again coop~rated with the containsr locking ring ~ to create a non-uniform stressing of the pilfer band 20, and in particular provide a progressive stressing of fracturable bridges 22. During closure removal, that portion of the interference lip ~ closest to the top wall portion 12 of the closure first engages the locking ring L of the container. This results in localized stressing in the r~gion of thi6 initial engagement. In ~his manner, progressi~e failure of the bridges 22 can be induced.
In order to prevent the interference lip 24 from slipping over the locking xing L without failure of bridges 22 during closure . ~val, it is desirable to provide means for preventing the pilfer band 22 from assuming a non-circular configuration. To this end, a plurality of circumfexentially spaced centering ribs 26 are provided on the inside surface of pilfer band 20 abova interference lip 24. centering ribs 26 are positioned to engage the container locking ring L during closure removal, and thus maintain the pilfer band in a circular configuration.
As will be appreciated, other suitable forms of centering means can be employed, such as by the provision of a continuous ~ing on the interior of the closure, or by the provision of an area of relatively reduced inside diameter just above the interference lip.
In essence, it is contemplated that a centering arrangement be provided for engagement with lock;n~ ring L as the interference lip 24 engages the locking ring, to thereby prevent the pilfer band from assuming a non-circular configuration, thus assuring the int~n~e~
fracture of bridges 22.
From the foregoing, it will be observed that numerous modifications and variations can be effected without departing from the true spirit and scope of the novel concept of the present invention. It is to be understood that no limitation with respect ~o the specific embodiments is intended or should be inferred~
The disclosure i~ inte~e~ to cover by the appended claims all such modifications as fall within the score of the claims.
Claims (21)
1. A tamper-indicating plastic closure for a container having an annular locking ring, said closure comprising:
a plastic cap having a top wall portion, and an annular, depending cylindrical skirt portion; and an annular pilfer band depending from said skirt portion and at least partially detachably connected thereto by frangible rib means, said pilfer band including an annular band portion, a plurality of circumferentially spaced, inwardly extending flexible tab means, and an annular interference bead positioned beneath said flexible tab means and extending inwardly of the bottom edge of said annular band portion;
said flexible tab means being engageable with said container locking ring; (1) when said flexible tab means extend generally angularly upwardly and inwardly of said annular band portion for fracturing said frangible rib means, and (2) when said flexible tab means extend generally angularly downwardly and inwardly of said annular band and are disposed between said annular locking ring and said interference bead for fracturing said frangible rib means.
a plastic cap having a top wall portion, and an annular, depending cylindrical skirt portion; and an annular pilfer band depending from said skirt portion and at least partially detachably connected thereto by frangible rib means, said pilfer band including an annular band portion, a plurality of circumferentially spaced, inwardly extending flexible tab means, and an annular interference bead positioned beneath said flexible tab means and extending inwardly of the bottom edge of said annular band portion;
said flexible tab means being engageable with said container locking ring; (1) when said flexible tab means extend generally angularly upwardly and inwardly of said annular band portion for fracturing said frangible rib means, and (2) when said flexible tab means extend generally angularly downwardly and inwardly of said annular band and are disposed between said annular locking ring and said interference bead for fracturing said frangible rib means.
2. A tamper-indicating plastic closure in accordance with claim 1, wherein said frangible rib means comprises a plurality of frangible ribs extending between the inside surfaces of said skirt portion and said annular band portion of said pilfer band, said pilfer band being distinguished and at least partially separated from said skirt portion by circumferential score means extending partially into said frangible ribs.
3. A tamper-indicating plastic closure in accordance with claim 2, wherein each of said flexible tab means has a thickness about equal to the radial dimension of said frangible ribs.
4. A tamper-indicating plastic closure in accordance with claim 1, wherein each of said flexible tab means has a thickness dimension between about 0.012 inches and 0.020 inches.
5. A tamper-indicating plastic closure in accordance with claim 1, including centering means engageable with said container locking ring for centering said closure on said container.
6. A tamper-indicating plastic closure in accordance with claim 5, wherein said frangible rib means comprises a plurality of circumferentially spaced frangible ribs extending between the inside surfaces of said skirt portion and said annular band portion of said pilfer band, said centering means comprising portions of at least some of said frangible ribs extending between adjacent ones of said flexible tab means.
7. A tamper-indicating plastic closure in accordance with claim 2, including scoring bead means extending circumferentially about the inside of said closure for supporting the interior of said closure during formation of said circumferential score means.
8. A tamper-indicating plastic closure in accordance with claim 2, including prestressing means for prestressing said frangible ribs comprising a plurality of circumferentially spaced prestressing projections on the inside of said pilfer band each positioned on a respective one of said frangible ribs, said prestressing projections being engageable with said container locking ring for prestressing said frangible ribs.
9. A tamper-indicating plastic closure in accordance with claim 1, wherein said pilfer band includes at least one vertical score means extending partially into said interference bead to define a fracturable residual portion of said pilfer band.
10. A tamper-indicating plastic closure for a container having an annular locking ring, said closure comprising:
a closure cap including a circular top wall portion and a depending, generally cylindrical skirt portion having an internal thread formation;
an annular pilfer band depending from said cylindrical skirt portion;
frangible rib means at least partially detachably connecting said pilfer band to said skirt portion, said frangible rib means comprising a plurality of spaced apart frangible ribs;
said pilfer band including interference means on the inside surface of said pilfer band, said interference means being engageable with the locking ring of said container during removal of said closure therefrom for fracturing said frangible ribs, said pilfer band further including centering means engageable with the locking ring of said container during removal of said closure therefrom for maintaining said pilfer band in a circular configuration; and said frangible rib means extending between the inside surfaces of said skirt portion and said pilfer band, said centering means comprising portions of said frangible rib means extending on the inside surface of said pilfer band.
a closure cap including a circular top wall portion and a depending, generally cylindrical skirt portion having an internal thread formation;
an annular pilfer band depending from said cylindrical skirt portion;
frangible rib means at least partially detachably connecting said pilfer band to said skirt portion, said frangible rib means comprising a plurality of spaced apart frangible ribs;
said pilfer band including interference means on the inside surface of said pilfer band, said interference means being engageable with the locking ring of said container during removal of said closure therefrom for fracturing said frangible ribs, said pilfer band further including centering means engageable with the locking ring of said container during removal of said closure therefrom for maintaining said pilfer band in a circular configuration; and said frangible rib means extending between the inside surfaces of said skirt portion and said pilfer band, said centering means comprising portions of said frangible rib means extending on the inside surface of said pilfer band.
11. A tamper-indicating plastic closure in accordance with claim 10, wherein said interference means comprises an interference lip extending about the inner surface of said pilfer band beneath said centering means in a plane extending at an acute angle to the vertical axis of said closure.
12. A tamper-indicating plastic closure for a container having an annular locking ring, said closure comprising:
a plastic cap including a top wall portion, and an annular, depending cylindrical skirt portion, and an annular pilfer band at least partially detachably connected to and depending from said skirt portion, said pilfer band including inwardly extending flexible tab means comprising a plurality of circumferentially spaced, flexible tabs extending inwardly of said pilfer band and each having a free end portion, and inwardly extending interference bead means positioned beneath said tab means, said free end portions of said flexible tabs of said tab means being engageable with said container locking ring when said flexible tabs extend upwardly and inwardly during removal of said closure from said container for providing a first means for at least partially detaching said pilfer band from said skirt portion, said tab means being further engageable with said locking ring during removal of said closure from said container by disposition of said tab means between said locking ring and said interference bead means for providing a second means for at least partially detaching said pilfer band from said skirt portion.
a plastic cap including a top wall portion, and an annular, depending cylindrical skirt portion, and an annular pilfer band at least partially detachably connected to and depending from said skirt portion, said pilfer band including inwardly extending flexible tab means comprising a plurality of circumferentially spaced, flexible tabs extending inwardly of said pilfer band and each having a free end portion, and inwardly extending interference bead means positioned beneath said tab means, said free end portions of said flexible tabs of said tab means being engageable with said container locking ring when said flexible tabs extend upwardly and inwardly during removal of said closure from said container for providing a first means for at least partially detaching said pilfer band from said skirt portion, said tab means being further engageable with said locking ring during removal of said closure from said container by disposition of said tab means between said locking ring and said interference bead means for providing a second means for at least partially detaching said pilfer band from said skirt portion.
13. A tamper-indicating plastic closure in accordance with claim 12, including frangible rib means for at least partially detachably connecting said pilfer band to said skirt portion.
14. A tamper-indicating plastic closure in accordance with claim 13, wherein said frangible means comprise a plurality of circumferentially spaced frangible ribs extending between inside surfaces of said skirt portion and said pilfer band, said pilfer band being distinguished and at least partially separated from said skirt portion by circumferential score means extending partially into said frangible ribs.
15. A tamper-indicating plastic closure in accordance with claim 12, wherein said tab means comprises a plurality of circumferentially spaced, flexible tabs extending inwardly of said pilfer band, and said interference bead means comprises an annular interference bead positioned beneath said flexible tabs.
16. A tamper-indicating plastic closure for a container having an annular locking ring, said closure comprising:
a plastic cap having a top wall portion, and an annular, depending cylindrical skirt portion having an internal thread formation, and an annular pilfer band depending from said skirt portion and at least partially detachably connected thereto by frangible rib means, said pilfer band including an annular band portion, a plurality of circumferentially spaced, inwardly extending flexible tab means, and an annular interference bead positioned beneath said flexible tab means and extending inwardly of the bottom edge of said annular band portion, said flexible tab means being engageable with said container locking ring: (1) when said flexible tab means extend generally angularly upwardly and inwardly of said annular band portion for fracturing said frangible rib means, and (2) when said flexible tab means extend generally angularly downwardly and inwardly of said annular band and are disposed between said annular locking ring and said interference bead for fracturing said frangible rib means.
a plastic cap having a top wall portion, and an annular, depending cylindrical skirt portion having an internal thread formation, and an annular pilfer band depending from said skirt portion and at least partially detachably connected thereto by frangible rib means, said pilfer band including an annular band portion, a plurality of circumferentially spaced, inwardly extending flexible tab means, and an annular interference bead positioned beneath said flexible tab means and extending inwardly of the bottom edge of said annular band portion, said flexible tab means being engageable with said container locking ring: (1) when said flexible tab means extend generally angularly upwardly and inwardly of said annular band portion for fracturing said frangible rib means, and (2) when said flexible tab means extend generally angularly downwardly and inwardly of said annular band and are disposed between said annular locking ring and said interference bead for fracturing said frangible rib means.
17. A tamper-indicating plastic closure in accordance with claim 16, wherein said frangible rib means comprises a plurality of frangible ribs extending between the inside surfaces of said skirt portion and said annular band portion of said pilfer band.
18. A tamper-indicating plastic closure in accordance with claim 17, wherein said frangible ribs collectively define a first inside diameter of said pilfer band, said annular interference bead defining a second inside diameter about equal to or less than said first inside diameter.
19. A tamper-indicating plastic closure in accordance with claim 17, wherein each of said flexible tab means has a thickness about equal to the radial dimension of said frangible ribs.
20. A tamper-indicating plastic closure in accordance with claim 17, wherein each of said flexible tab means is a generally planar configuration.
21. A tamper-indicating plastic closure in accordance with claim 20, wherein each of said flexible tab means has a thickness dimension between about 0.012 inches and 0.020 inches.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/303,317 US4923073A (en) | 1989-01-30 | 1989-01-30 | Tamper-indicating plastic closure |
| US303,317 | 1989-01-30 | ||
| US343,995 | 1989-04-26 | ||
| US07343995 US4938370B1 (en) | 1989-04-26 | 1989-04-26 | Tamper-indicating plastic closure |
| US07/465,301 US4978017A (en) | 1989-04-26 | 1990-01-23 | Tamper-indicating plastic closure |
| US465,301 | 1990-01-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2008769A1 CA2008769A1 (en) | 1990-07-30 |
| CA2008769C true CA2008769C (en) | 2002-03-19 |
Family
ID=27404930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2008769 Expired - Lifetime CA2008769C (en) | 1989-01-30 | 1990-01-29 | Tamper-indicating plastic closure |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0381118B1 (en) |
| JP (1) | JP2810936B2 (en) |
| AR (1) | AR246724A1 (en) |
| AU (1) | AU627270B2 (en) |
| BR (1) | BR9000381A (en) |
| CA (1) | CA2008769C (en) |
| DE (1) | DE69004820T2 (en) |
| DK (1) | DK174625B1 (en) |
| ES (1) | ES2048330T3 (en) |
| NO (1) | NO178997C (en) |
| NZ (1) | NZ232297A (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5050753A (en) * | 1990-08-27 | 1991-09-24 | H-C Industries, Inc. | Preferentially strengthened tamper-indicating plastic closure |
| JP3209538B2 (en) * | 1991-04-08 | 2001-09-17 | 日本クラウンコルク株式会社 | Synthetic resin cap with pill fur proof characteristics |
| US5289931A (en) * | 1991-04-08 | 1994-03-01 | Japan Crown Cork Co., Ltd. | Pilfer-proof synthetic resin cap |
| US5205426A (en) * | 1991-04-09 | 1993-04-27 | H-C Industries, Inc. | Tamper-indicating plastic closure |
| JP2591656Y2 (en) * | 1991-04-17 | 1999-03-10 | 株式会社柴崎製作所 | cap |
| DE4201997C1 (en) * | 1992-01-25 | 1992-12-10 | Stella Kunststofftechnik Gmbh, 6228 Eltville, De | |
| EG21314A (en) | 1992-07-16 | 2000-10-31 | Driutt Rodney Malcolm | Tamper evident closure |
| JP2602972Y2 (en) * | 1992-08-07 | 2000-02-07 | 日本クラウンコルク株式会社 | Synthetic resin cap with tamper-resistant band |
| US5356019A (en) * | 1992-10-14 | 1994-10-18 | Crown Cork & Seal Company, Inc. | Tamper indicating plastic closure |
| IT1279973B1 (en) * | 1995-07-05 | 1997-12-23 | Sacmi | SCREW CAP WITH GUARANTEE RING |
| CN1105669C (en) * | 1995-11-15 | 2003-04-16 | 奥科亚瓶盖系统日本有限公司 | Closure device and container |
| ES2152660T3 (en) * | 1996-05-14 | 2001-02-01 | Shibazaki Seisakusho Ltd | SEALING DEVICE AND CONTAINER. |
| CA2230152C (en) * | 1997-02-27 | 2001-09-18 | Keith W. Ingram | Tamper indicating package |
| US5979682A (en) | 1997-04-14 | 1999-11-09 | Zumbuhl; Bruno | Tab construction for closures having tamper evident rings |
| AUPO788597A0 (en) | 1997-07-14 | 1997-08-07 | Closures And Packaging Services Limited | Closure |
| US7575123B2 (en) | 2005-01-19 | 2009-08-18 | Rieke Corporation | Tamper-evident locking band for a container closure |
| JP4818739B2 (en) * | 2006-01-20 | 2011-11-16 | 日本クラウンコルク株式会社 | Plastic cap |
| JP2012171647A (en) * | 2011-02-21 | 2012-09-10 | Japan Crown Cork Co Ltd | Synthetic resin container lid |
| WO2014017893A1 (en) * | 2012-07-26 | 2014-01-30 | Rodriguez Gome Jorge Eduardo | Lid with liquid container with safety projection |
| CN116723986A (en) * | 2020-12-22 | 2023-09-08 | 凸版印刷株式会社 | Closure, packaging container, and method for manufacturing closure |
| US20240327072A1 (en) * | 2023-03-31 | 2024-10-03 | Closure Systems International Inc. | Package and closure with tamper-evident band |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2033350B (en) * | 1978-11-07 | 1983-05-05 | Ug Closures & Plastics Ltd | Tamperproof closure |
| US4432461A (en) * | 1982-04-09 | 1984-02-21 | Owens-Illinois, Inc. | Tamper indicating package |
| US4635808A (en) * | 1982-12-14 | 1987-01-13 | Maxcap, Inc. | Plastic cap |
| US4694969A (en) * | 1983-11-17 | 1987-09-22 | Aci Australia Limited | Container closure |
| EP0229206A1 (en) * | 1986-01-13 | 1987-07-22 | Ewit S.A. | Container closure with a tamper-indicating band |
| US4744478A (en) * | 1986-10-23 | 1988-05-17 | Permian Research Corporation | Plastic closure with unitarily molded, foamed sealing layer |
| CH672109A5 (en) * | 1987-01-30 | 1989-10-31 | Wiedmer Plastikform W | |
| CH671205A5 (en) * | 1987-02-26 | 1989-08-15 | Crown Cork Ag | |
| US4848614A (en) * | 1987-11-13 | 1989-07-18 | General Kap Corporation | Tamper-evident plastic closure |
| JPH06356Y2 (en) * | 1988-10-24 | 1994-01-05 | 株式会社柴崎製作所 | cap |
-
1990
- 1990-01-29 CA CA 2008769 patent/CA2008769C/en not_active Expired - Lifetime
- 1990-01-29 NO NO900407A patent/NO178997C/en unknown
- 1990-01-29 DE DE1990604820 patent/DE69004820T2/en not_active Expired - Fee Related
- 1990-01-29 ES ES90101729T patent/ES2048330T3/en not_active Expired - Lifetime
- 1990-01-29 EP EP90101729A patent/EP0381118B1/en not_active Expired - Lifetime
- 1990-01-29 DK DK23690A patent/DK174625B1/en not_active IP Right Cessation
- 1990-01-30 AU AU48910/90A patent/AU627270B2/en not_active Expired
- 1990-01-30 JP JP2020379A patent/JP2810936B2/en not_active Expired - Fee Related
- 1990-01-30 BR BR9000381A patent/BR9000381A/en not_active IP Right Cessation
- 1990-01-30 NZ NZ23229790A patent/NZ232297A/en unknown
- 1990-01-30 AR AR31604990A patent/AR246724A1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| NO900407D0 (en) | 1990-01-29 |
| DK174625B1 (en) | 2003-07-28 |
| NZ232297A (en) | 1991-12-23 |
| DE69004820T2 (en) | 1994-06-16 |
| AR246724A1 (en) | 1994-09-30 |
| ES2048330T3 (en) | 1994-03-16 |
| DE69004820D1 (en) | 1994-01-13 |
| NO178997C (en) | 1996-07-17 |
| JP2810936B2 (en) | 1998-10-15 |
| EP0381118A1 (en) | 1990-08-08 |
| CA2008769A1 (en) | 1990-07-30 |
| NO178997B (en) | 1996-04-09 |
| DK23690D0 (en) | 1990-01-29 |
| DK23690A (en) | 1990-07-31 |
| NO900407L (en) | 1990-07-31 |
| AU627270B2 (en) | 1992-08-20 |
| AU4891090A (en) | 1990-08-02 |
| BR9000381A (en) | 1990-12-04 |
| EP0381118B1 (en) | 1993-12-01 |
| JPH02296666A (en) | 1990-12-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |