CA1289300C - Stretchable diaper tab - Google Patents
Stretchable diaper tabInfo
- Publication number
- CA1289300C CA1289300C CA000531857A CA531857A CA1289300C CA 1289300 C CA1289300 C CA 1289300C CA 000531857 A CA000531857 A CA 000531857A CA 531857 A CA531857 A CA 531857A CA 1289300 C CA1289300 C CA 1289300C
- Authority
- CA
- Canada
- Prior art keywords
- layer means
- tab
- outer layer
- terminal
- tab fastener
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/58—Adhesive tab fastener elements
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
STRETCHABLE DIAPER TAB
ABSTRACT OF THE DISCLOSURE
A disposable diaper has tabs which are converted from a nonextensible to an extensible state by merely deploying the tabs for diapering and without having to break a weakened joint to accomplish the conversion.
ABSTRACT OF THE DISCLOSURE
A disposable diaper has tabs which are converted from a nonextensible to an extensible state by merely deploying the tabs for diapering and without having to break a weakened joint to accomplish the conversion.
Description
~9;~
STRETCHA~LE DIAPER TAB
BACKGROUND OF TI~E INVENTION
This invention relates to disposable diapers provided with adhesive tab Easteners, and particulsrly tab Easteners oE the e~tensible type useEul Eor diaper closure arl~ in other applications.
~ xtensible ~laper tabs have previously been pro~
pose~ as a means ~o i.mprove tlle Eit o~ the diaper by utLlizlrl~ tlle dlaper tab~ as elastic extensible side waistbands.
An early proposal is that oÇ U.S. Pa~ent 3,800,796 to Jacobs. Later improvements or alternatlves to tlle early Jaco~s concept oE an extensible tab include U.S. Patent 4,051,853 to E~an and U.S. eatent 4,066,081 to Schaar.
One problem wi~h extensible tabs is tlle need to avoid ~remature stretchl.ng prior to initial Eastening oE
the ~iaper, and particularly to stabilize (avoid stretch-in~) the stretcllable par~ o~ the tab tna~eri~l, so as to allow accurate placement oE tabs on the diaper, even under the iner~ia ~tresses associated with the highline speeds that are neceQsflry Eor economica~ manufacture.
One approacll to this problem oE premature extension is showrl ln U.S. Patent 4,389,212 to Tritsch. In this approach, a breakable "attacllment portion" 40 ~FIG. 3), 140 (FIG. 6), or 240 (FIG. 7) provides temporary stabili-zation. This "att~chment portion" appears to be a weak-ened ~oLnt Ln tlle midsec~ion oE the tab, which joint is not completely parted until the end user Eastens the diaper. Tritsch does not disclose how such a weakened ,~, -~.;,~
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~oint is ~ormed, nor how it is conditioned to res~st breaking under high inertia stresses during diaper manu-Eacture and yet part readlly and conveniently when the diaper and its tabs are deployed to diaper a baby.
SUMMARY OF THE INVENTION
The present invention provides stabilizing means Eor preventing premature extension of an extensible diaper tab, but without reliance on use of a weakened ~oint which must be counted on to hold or part under stress accordlng to the circumstances. Instead, the con-Eiguration oE the tab ls such that the stretchy tab material is Ereed to stretch only when the tab is de-ployed Eor diapering. erior to that time, the stretchy tab material remains Eastened at back ends to nonexten-sible means at all times beEore, during, and after appli-cation oE the tab.
The result is a tab that is positLvely nonex-tensible until deployed for diapering but is rendered extensible by the very act of deployment and without havirl~ to rely on satisEactory breakability oE a joint or other element.
~r oo 2a In summary, the present invention may therefore be considered as providing a tab fastener for disposable diapers or other tab-fastened articles, the tab fastener having length, width, and thickness directions, the tab fastener comprising, with respect to its lengthwise direction, terminal segments and a central segment between the terminal segments, the tab fastener comprising, with respect to its thickness direction, inner layer means and outer layer means, the inner layer means at the terminal segments being permanently adhered to opposite sides of a side margin of the article by pressure-sensitive adhesive, the outer layer means permanently adhered to the inner layer means at a first of the terminal segments and being releasably adhered thereto at the second of the terminal segments, the inner layer means being non-extensible at least at the central segment, the non-extensibility of the inner layer means being imparted to the outer layer means when the inner and outer layer means are adhered at the second terminal segment, the outer layer means being extensible at least at the central segment upon release from the inner layer means at the second terminal segment, whereby prior to the release the inner layer means contributes to stabilizing the tab fastener against premature elongation, the outer layer means presenting a uniform outer face that is of the same material and is substantially uniformly supported by underlying layers throughout the terminal and central segments, the uniformity of the material and support of the face being substantially uninterrupted by the presence of a slit of negligible width in the lengthwise direction in a portion of the outer layer means, the face being provided with a release surface that is releasable from the pressure-sensitive adhesive whereby the tab is adapted to be formed of stock material that is capable of being self-wound without significant voids.
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BRIEF ~ESGRIPTION OF THE DRAWINGS
In ~he drawings, the thicknesses oE ~he webs and coatings are greatly exaggerated and not to scale.
FIG. 1 is a diagrammatic transverse elevation oF
diaper tab stock constructed according to the invention snd then cut transversely to machine direction (machine direction being into the paper) to thereby Eorm an indi vidual tab.
FIG. 2 is a view of the tab shown in FIG. 1, Eolded and Eastened around one portion of a diaper by the dialer manufacturec.
FIG. 3 is a view oE the same tab now deployed Eor diaperlng.
FlG. 4 is a sketch on a much ~m~ller scale o~ a diaper fastened with a pair oE the tabs.
FIG. 5 shows an alternative Eorm oE the inven tion.
FIG. 6 shows still another alternative.
FIG. 7 is a more detailed view of the indicated portion oE FIG. 6.
' :
DETAILED DESCRIPTION OF THE DRAWINGS
The tab seen in FlG. 1 is cut Erom a continuous tape oE dlaper tab stock, and FIG. 1 is, in eEEect, a diagrammatic cross-sectional view of such diaper tab stock as well as an elevational view oE a single tab.
The diaper tab stock consists oE initially flat but Elexible layers suitable to be Eormed ~n long passes along the machine direction (into or out oE the paper as seen in FIG. 1) o~ a coating and laminating line.
,~
.
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The~e layers include an unwind release coating 1, a carrier web layer 2, a layer o~ pressure-sensitive adhesive 3, a layer o~ stretcha~le or extensible web 4 such as polyurethane ~ilm, a layer oE pressure-sensitive adhesive 5, a liner web 7 o~ nonextensible material such as paper and provided along a segment on one ~ace with sui~a~le release means such as the release coating 6, and a layer oE pressure-sensitive adhesive 8. These make up the tab stock and the individual tab 10 ~ormed Erom the tab stock. At the intermediate point 20, lengthwise oE
each tab 10, the layer 2 along with the coating 1 is ~ncised or slit, the layers 3 and 5 may be interrupted as showrl, and the coating 6 which extends only Erom one end is terminated. Adhesive layers 3 and 5 have essentially no mechanlcal strength, and it is not necessary to inter-rupt them as shown, but doing so tends to improve the neatness oE the deploylng action, which will be described below.
Tab 10 comprises Eirst and second terminal seg-ments ~enerally indicated at 11 and 12 and a central seg-ment between segments 11 and 12 and at and surrounding intermediate point 20. It will be noted that both layers 4 and 7 are uninterrupted and that extensible layer 4 is adhered to nonextensible layer 7 at both terminal seg-ments 11 and 12. At the Eirst termlnal segment 11, such adllerence is permanent. At the second terminal se~ment 12, such adherence is releasable, due to the presence oE
the release coatlng 6 on the nonextensible layer 7.
FIG. 2 shows the tab oE FIG. 1 placed around an ed8e or side margin oE a diaper 15. It will be seen that . layers 1-5 are relatively spaced from diaper 15. These layers 1-5 comprise outer layer means, while layers 7 and ~,~, ' : ':' , . .
`
:
o~
8 compcLse inner layer means which are ad~acent the diauer and are permanently adhered to opposite sides of the ~iaper side margln at the terminal segments 11 and 12 The outer layer means 1-5 will be seen to be perma-nentlv adhered to the inner layer means 7,8 at the first terminal segment 11 and releasably adhered thereto at the second terminal segment 12. The second terminal segment 12 is on the inner side 15a oE the diaper 15.
The inner layer means is nonextensible because it includes the nonextensible layer 7 and this nonexten-sibillty is imparted to the outer layer means 1-5 so long as the latter is adhered to the inner layer means at both terminal segments 11 and 12. Thus, the tab construction is nonextensible in the conditions shown in both FIGS
and 2 When the tab 10 is to be deployed Eor diapering, the outer layer meMns 1-5 are released From the inner layer means 7-8 at the second terminal segment 12 to thereby expose snd present the ad1lesive l~yer 5 at the second terminal end Eor Eastening to another portion oE
the diaper (not shown in FIG. 3). Upon such release, the outer layer means 1-5 is no longer stabilized Ag~inst extension because now the only signiEicAnt mecl-a~ical connection between the terminal segments oE the outer layer means is tlle extensible layer 4 This conversion Erom the nonextensible to tlle extensible state is ancom-plislled simply by the releasLng oE the outer layer means Erom the inner layer means at the terminal segment 12, and without having to rely on satisEactory breakability oE a ~oint or other element.
It is desirable that extensibility be generally concen~rated at the central segment that surrounds inter-mediate point 20 and is between terminal segments 11 and ,, . ~
'-, ~28~.3~0 12 It will ~e noted that even in the deployecl conclition oE the tab the terminal segments 11 and 12 remain con-strainecl against stretching by the anchoring actlon of the non-extensible carrier layer 2 which remains adhered to the extensible l~yer '~ at the terminal segments 11 and FIG 4 shows the diaper 15 as wr~ppeci on ~n infant (not shown) with two oE the tabs 10 ~astening the ciiaper aEter tab deployment in the manner shown in FIG. 3 FIG. 5 shows an alternative construction wllicl is generally similar to the previously described con-struction except tllat tl-le positions oE the carrier layer 2b and the stretchable layer 4b llave been exchanged so that the stretchable layer becomes the top layer oE the sandwich (except Ecr release coat 1) insteaci of a center layer as in FIGS 1-3.
FlGS. 6 ancl 7 show a mocliEication which is gerlerally sLmil~r to the tab 10 oE FIGS. 1-3 except that in~tead oE a single slit in the non-stretclly carrler layer 2 at point 20 as in FIG. 1 severfll parallel slits are provided so that between tlle parallel slits anti-stretch microanchors 2c are formed Erom small portions oE
~he relatively non-stretchy carrier layer 2 Also the adhesive layer 3 is not interrupted at intermediate point but instead serves at this point to ~dhere the micro-anchors 2c to the extensible layer 4 This arrangement desLrubly ten~s to stabilize tlle extensible layer 4 so as to limit and control the stretching action if it is otllerwise somewhat more "loose" than is most desirable It sllould be ev~dent that this disclosure is by w~y oE example and that various changes may be macle by adding modiEying or eliminating details without depart-ing Erom the Eair scope oE the teaching contained in this 1~893J00 diselosure. For example, the adhesive layer 3 need not be a pressure sensitive adhesive, and may be a "perma-nent" adhesive or may be simply a heat-sealed or welded interEace between layers 2 and '~ (interrupted at location 20).
Also by way oE ex~mple, the invention can be used in a construction which provides a separable sectLon that is left behind on that part of the diaper from which the tab is peeled when the diaper is opened aEter Easten-ing, thus providing a "landing" or "target" for improving the reclosability oE the diaper, as shown in U.S. Patent 4,020,842 oE common assignee.
The invention can also be used in other applica-tions where there is need for ta~ Easteners of the exten-sible type, such as surgical drapes, surgical gowns, dis-posable ~arments, sheets, cartons, envelopes or the like.
The invention is thereEore not limited to par-ticular details oE this disclosure except to the extent that the Eollowing claims are necessarily so limited.
: ~ ' - ' ~ '' -: :
STRETCHA~LE DIAPER TAB
BACKGROUND OF TI~E INVENTION
This invention relates to disposable diapers provided with adhesive tab Easteners, and particulsrly tab Easteners oE the e~tensible type useEul Eor diaper closure arl~ in other applications.
~ xtensible ~laper tabs have previously been pro~
pose~ as a means ~o i.mprove tlle Eit o~ the diaper by utLlizlrl~ tlle dlaper tab~ as elastic extensible side waistbands.
An early proposal is that oÇ U.S. Pa~ent 3,800,796 to Jacobs. Later improvements or alternatlves to tlle early Jaco~s concept oE an extensible tab include U.S. Patent 4,051,853 to E~an and U.S. eatent 4,066,081 to Schaar.
One problem wi~h extensible tabs is tlle need to avoid ~remature stretchl.ng prior to initial Eastening oE
the ~iaper, and particularly to stabilize (avoid stretch-in~) the stretcllable par~ o~ the tab tna~eri~l, so as to allow accurate placement oE tabs on the diaper, even under the iner~ia ~tresses associated with the highline speeds that are neceQsflry Eor economica~ manufacture.
One approacll to this problem oE premature extension is showrl ln U.S. Patent 4,389,212 to Tritsch. In this approach, a breakable "attacllment portion" 40 ~FIG. 3), 140 (FIG. 6), or 240 (FIG. 7) provides temporary stabili-zation. This "att~chment portion" appears to be a weak-ened ~oLnt Ln tlle midsec~ion oE the tab, which joint is not completely parted until the end user Eastens the diaper. Tritsch does not disclose how such a weakened ,~, -~.;,~
.,~
. . , :
- .
: ~- . . . . . . .
930~
~oint is ~ormed, nor how it is conditioned to res~st breaking under high inertia stresses during diaper manu-Eacture and yet part readlly and conveniently when the diaper and its tabs are deployed to diaper a baby.
SUMMARY OF THE INVENTION
The present invention provides stabilizing means Eor preventing premature extension of an extensible diaper tab, but without reliance on use of a weakened ~oint which must be counted on to hold or part under stress accordlng to the circumstances. Instead, the con-Eiguration oE the tab ls such that the stretchy tab material is Ereed to stretch only when the tab is de-ployed Eor diapering. erior to that time, the stretchy tab material remains Eastened at back ends to nonexten-sible means at all times beEore, during, and after appli-cation oE the tab.
The result is a tab that is positLvely nonex-tensible until deployed for diapering but is rendered extensible by the very act of deployment and without havirl~ to rely on satisEactory breakability oE a joint or other element.
~r oo 2a In summary, the present invention may therefore be considered as providing a tab fastener for disposable diapers or other tab-fastened articles, the tab fastener having length, width, and thickness directions, the tab fastener comprising, with respect to its lengthwise direction, terminal segments and a central segment between the terminal segments, the tab fastener comprising, with respect to its thickness direction, inner layer means and outer layer means, the inner layer means at the terminal segments being permanently adhered to opposite sides of a side margin of the article by pressure-sensitive adhesive, the outer layer means permanently adhered to the inner layer means at a first of the terminal segments and being releasably adhered thereto at the second of the terminal segments, the inner layer means being non-extensible at least at the central segment, the non-extensibility of the inner layer means being imparted to the outer layer means when the inner and outer layer means are adhered at the second terminal segment, the outer layer means being extensible at least at the central segment upon release from the inner layer means at the second terminal segment, whereby prior to the release the inner layer means contributes to stabilizing the tab fastener against premature elongation, the outer layer means presenting a uniform outer face that is of the same material and is substantially uniformly supported by underlying layers throughout the terminal and central segments, the uniformity of the material and support of the face being substantially uninterrupted by the presence of a slit of negligible width in the lengthwise direction in a portion of the outer layer means, the face being provided with a release surface that is releasable from the pressure-sensitive adhesive whereby the tab is adapted to be formed of stock material that is capable of being self-wound without significant voids.
~......
' ., ~
1~8~ 06:~
BRIEF ~ESGRIPTION OF THE DRAWINGS
In ~he drawings, the thicknesses oE ~he webs and coatings are greatly exaggerated and not to scale.
FIG. 1 is a diagrammatic transverse elevation oF
diaper tab stock constructed according to the invention snd then cut transversely to machine direction (machine direction being into the paper) to thereby Eorm an indi vidual tab.
FIG. 2 is a view of the tab shown in FIG. 1, Eolded and Eastened around one portion of a diaper by the dialer manufacturec.
FIG. 3 is a view oE the same tab now deployed Eor diaperlng.
FlG. 4 is a sketch on a much ~m~ller scale o~ a diaper fastened with a pair oE the tabs.
FIG. 5 shows an alternative Eorm oE the inven tion.
FIG. 6 shows still another alternative.
FIG. 7 is a more detailed view of the indicated portion oE FIG. 6.
' :
DETAILED DESCRIPTION OF THE DRAWINGS
The tab seen in FlG. 1 is cut Erom a continuous tape oE dlaper tab stock, and FIG. 1 is, in eEEect, a diagrammatic cross-sectional view of such diaper tab stock as well as an elevational view oE a single tab.
The diaper tab stock consists oE initially flat but Elexible layers suitable to be Eormed ~n long passes along the machine direction (into or out oE the paper as seen in FIG. 1) o~ a coating and laminating line.
,~
.
.
:~
. .
, 39~10~
The~e layers include an unwind release coating 1, a carrier web layer 2, a layer o~ pressure-sensitive adhesive 3, a layer o~ stretcha~le or extensible web 4 such as polyurethane ~ilm, a layer oE pressure-sensitive adhesive 5, a liner web 7 o~ nonextensible material such as paper and provided along a segment on one ~ace with sui~a~le release means such as the release coating 6, and a layer oE pressure-sensitive adhesive 8. These make up the tab stock and the individual tab 10 ~ormed Erom the tab stock. At the intermediate point 20, lengthwise oE
each tab 10, the layer 2 along with the coating 1 is ~ncised or slit, the layers 3 and 5 may be interrupted as showrl, and the coating 6 which extends only Erom one end is terminated. Adhesive layers 3 and 5 have essentially no mechanlcal strength, and it is not necessary to inter-rupt them as shown, but doing so tends to improve the neatness oE the deploylng action, which will be described below.
Tab 10 comprises Eirst and second terminal seg-ments ~enerally indicated at 11 and 12 and a central seg-ment between segments 11 and 12 and at and surrounding intermediate point 20. It will be noted that both layers 4 and 7 are uninterrupted and that extensible layer 4 is adhered to nonextensible layer 7 at both terminal seg-ments 11 and 12. At the Eirst termlnal segment 11, such adllerence is permanent. At the second terminal se~ment 12, such adherence is releasable, due to the presence oE
the release coatlng 6 on the nonextensible layer 7.
FIG. 2 shows the tab oE FIG. 1 placed around an ed8e or side margin oE a diaper 15. It will be seen that . layers 1-5 are relatively spaced from diaper 15. These layers 1-5 comprise outer layer means, while layers 7 and ~,~, ' : ':' , . .
`
:
o~
8 compcLse inner layer means which are ad~acent the diauer and are permanently adhered to opposite sides of the ~iaper side margln at the terminal segments 11 and 12 The outer layer means 1-5 will be seen to be perma-nentlv adhered to the inner layer means 7,8 at the first terminal segment 11 and releasably adhered thereto at the second terminal segment 12. The second terminal segment 12 is on the inner side 15a oE the diaper 15.
The inner layer means is nonextensible because it includes the nonextensible layer 7 and this nonexten-sibillty is imparted to the outer layer means 1-5 so long as the latter is adhered to the inner layer means at both terminal segments 11 and 12. Thus, the tab construction is nonextensible in the conditions shown in both FIGS
and 2 When the tab 10 is to be deployed Eor diapering, the outer layer meMns 1-5 are released From the inner layer means 7-8 at the second terminal segment 12 to thereby expose snd present the ad1lesive l~yer 5 at the second terminal end Eor Eastening to another portion oE
the diaper (not shown in FIG. 3). Upon such release, the outer layer means 1-5 is no longer stabilized Ag~inst extension because now the only signiEicAnt mecl-a~ical connection between the terminal segments oE the outer layer means is tlle extensible layer 4 This conversion Erom the nonextensible to tlle extensible state is ancom-plislled simply by the releasLng oE the outer layer means Erom the inner layer means at the terminal segment 12, and without having to rely on satisEactory breakability oE a ~oint or other element.
It is desirable that extensibility be generally concen~rated at the central segment that surrounds inter-mediate point 20 and is between terminal segments 11 and ,, . ~
'-, ~28~.3~0 12 It will ~e noted that even in the deployecl conclition oE the tab the terminal segments 11 and 12 remain con-strainecl against stretching by the anchoring actlon of the non-extensible carrier layer 2 which remains adhered to the extensible l~yer '~ at the terminal segments 11 and FIG 4 shows the diaper 15 as wr~ppeci on ~n infant (not shown) with two oE the tabs 10 ~astening the ciiaper aEter tab deployment in the manner shown in FIG. 3 FIG. 5 shows an alternative construction wllicl is generally similar to the previously described con-struction except tllat tl-le positions oE the carrier layer 2b and the stretchable layer 4b llave been exchanged so that the stretchable layer becomes the top layer oE the sandwich (except Ecr release coat 1) insteaci of a center layer as in FIGS 1-3.
FlGS. 6 ancl 7 show a mocliEication which is gerlerally sLmil~r to the tab 10 oE FIGS. 1-3 except that in~tead oE a single slit in the non-stretclly carrler layer 2 at point 20 as in FIG. 1 severfll parallel slits are provided so that between tlle parallel slits anti-stretch microanchors 2c are formed Erom small portions oE
~he relatively non-stretchy carrier layer 2 Also the adhesive layer 3 is not interrupted at intermediate point but instead serves at this point to ~dhere the micro-anchors 2c to the extensible layer 4 This arrangement desLrubly ten~s to stabilize tlle extensible layer 4 so as to limit and control the stretching action if it is otllerwise somewhat more "loose" than is most desirable It sllould be ev~dent that this disclosure is by w~y oE example and that various changes may be macle by adding modiEying or eliminating details without depart-ing Erom the Eair scope oE the teaching contained in this 1~893J00 diselosure. For example, the adhesive layer 3 need not be a pressure sensitive adhesive, and may be a "perma-nent" adhesive or may be simply a heat-sealed or welded interEace between layers 2 and '~ (interrupted at location 20).
Also by way oE ex~mple, the invention can be used in a construction which provides a separable sectLon that is left behind on that part of the diaper from which the tab is peeled when the diaper is opened aEter Easten-ing, thus providing a "landing" or "target" for improving the reclosability oE the diaper, as shown in U.S. Patent 4,020,842 oE common assignee.
The invention can also be used in other applica-tions where there is need for ta~ Easteners of the exten-sible type, such as surgical drapes, surgical gowns, dis-posable ~arments, sheets, cartons, envelopes or the like.
The invention is thereEore not limited to par-ticular details oE this disclosure except to the extent that the Eollowing claims are necessarily so limited.
: ~ ' - ' ~ '' -: :
Claims (8)
1. A tab fastener for disposable diapers or other tab-fastened articles, said tab fastener having length, width, and thickness directions, the tab fastener comprising, with respect to its lengthwise direction, terminal segments and a central segment between the terminal segments, the tab fastener comprising, with respect to its thickness direction, inner layer means and outer layer means, said inner layer means at said terminal segments being permanently adhered to opposite sides of a side margin of the article by pressure-sensitive adhesive, said outer layer means permanently adhered to said inner layer means at a first of said terminal segments and being releasably adhered thereto at the second of said terminal segments, said inner layer means being non-extensible at least at said central segment, said non-extensibility of said inner layer means being imparted to said outer layer means when said inner and outer layer means are adhered at said second terminal segment, said outer layer means being extensible at least at said central segment upon release from said inner layer means at said second terminal segment, whereby prior to said release said inner layer means contributes to stabilizing said tab fastener against premature elongation, the outer layer means presenting a uniform outer face that is of the same material and is substantially uniformly supported by underlying layers throughout the terminal and central segments, the uniformity of the material and support of the face being substantially uninterrupted by the presence of a slit of negligible width in the lengthwise direction in a portion of the outer layer means, the face being provided with a release surface that is releasable from the pressure-sensitive adhesive whereby the tab is adapted to be formed of stock material that is capable of being self-wound without significant voids.
2. A tab fastener as in Claim 1 in which the extensibility of the outer layer means is concentrated at said central segment.
3. A tab fastener as in claim 2 in which the outer layer means includes a layer of extensible material and a layer of nonextensible material adhered to said layer of extensible material at said first and second terminal segments but not adhered to said layer of exten-sible material at at least a portion of said central seg-ment.
4. A tab fastener as in claim 3 in which said layer of nonextellsible material is on the outer side of said layer of extensible material.
5. A tab fastener as in claim 3 in which said layer of nonextensible material is on the inner side of said layer of extensible material.
6. A tab fastener as in claim 3 in which said outer layer means at said central segment includes indi-vidual microanchors formed or slit from portions of said layer of nonextensible material and adhered to said layer of extensible material.
7. A tab fastener as in claim 1 in which said releasable adherence of said outer layer to said inner layer is established by a release coat having an active face extending only partly along the length of the tab.
8. A disposable diaper having at least one tab fastener at a side margin of the diaper, the tab fastener having length, width, and thickness directions, the tab fastener comprising, with respect to its lengthwise direction, terminal segments and a central segment between the terminal segments, the tab fastener comprising, with respect to its thickness direction, inner layer means and outer layer means, said inner layer means at said terminal segments being permanently adhered to opposite sides of said diaper side margin by pressure-sensitive adhesive said outer layer means being permanently adhered to said inner layer means at a first of said terminal segments and being releasably adhered thereto at the second of said terminal segments, said inner layer means being non-extensible at least at said central segment, said non-extensibility of said inner layer means being imparted to said outer layer means when said inner and outer layer means are adhered at said second terminal segment, said outer layer mean being extensible at least at said central segment upon release from said inner layer means at said second terminal segment, whereby prior to said release-said inner layer means contributes to stabilizing said tab fastener against premature elongation, the outer layer means presenting a uniform outer face that is of the same material and is substantially uniformly supported by underlying layers throughout the terminal and central segments, the uniformity of the material and support of the face being substantially uninterrupted by the presence of a slit of negligible width in said lengthwise direction in a portion of the outer layer means, the face being provided with a release surface that is releasable from the pressure-sensitive adhesive whereby the tab is adapted to be formed from stock material that is capable of being self-wound without significant voids.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US84042986A | 1986-03-14 | 1986-03-14 | |
| US840,429 | 1986-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1289300C true CA1289300C (en) | 1991-09-24 |
Family
ID=25282358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000531857A Expired - Lifetime CA1289300C (en) | 1986-03-14 | 1987-03-12 | Stretchable diaper tab |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0264387A4 (en) |
| JP (1) | JPS63502841A (en) |
| KR (1) | KR880700645A (en) |
| AU (1) | AU588193B2 (en) |
| BR (1) | BR8706043A (en) |
| CA (1) | CA1289300C (en) |
| WO (1) | WO1987005471A1 (en) |
| ZA (1) | ZA871842B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5092862A (en) * | 1988-03-23 | 1992-03-03 | The Procter & Gamble Company | Elastic securement of an article with segments capable of being elastically shirred |
| US5571097A (en) * | 1994-11-29 | 1996-11-05 | Minnesota Mining And Manufacturing Company | Adhesive tape tab closure system |
| US6030373A (en) * | 1995-04-13 | 2000-02-29 | Kimberly-Clark Worldwide, Inc. | Multi-attachment fastening system |
| US9592165B2 (en) | 2006-09-08 | 2017-03-14 | Jennifer Lynn Labit | Reusable diapers having seam allowances and/or 3×3 arrays of snap members |
| US8992498B2 (en) | 2008-03-31 | 2015-03-31 | Jennifer Lynn Labit | Reusable diapers |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4020842A (en) * | 1975-10-23 | 1977-05-03 | Avery International Corporation | Linerless, reclosable tab stock |
| US4074716A (en) * | 1977-01-03 | 1978-02-21 | Colgate-Palmolive Company | Diaper with elastic fastener tab |
| FR2484798A1 (en) * | 1980-06-19 | 1981-12-24 | Beghin Say Sa | ELASTIC FASTENERS FOR COUCHE-CULOTTE |
| US4389212A (en) * | 1981-12-02 | 1983-06-21 | Personal Products Company | Diaper with potentially elastic tape fastener |
| DE8212480U1 (en) * | 1982-04-30 | 1982-08-05 | Beiersdorf Ag, 2000 Hamburg | ELASTIC PERSONAL DIAPER CLOSURE |
-
1987
- 1987-03-11 EP EP19870902010 patent/EP0264387A4/en not_active Withdrawn
- 1987-03-11 AU AU71269/87A patent/AU588193B2/en not_active Ceased
- 1987-03-11 WO PCT/US1987/000520 patent/WO1987005471A1/en not_active Application Discontinuation
- 1987-03-11 BR BR8706043A patent/BR8706043A/en unknown
- 1987-03-11 JP JP62501783A patent/JPS63502841A/en active Pending
- 1987-03-12 CA CA000531857A patent/CA1289300C/en not_active Expired - Lifetime
- 1987-03-13 ZA ZA871842A patent/ZA871842B/en unknown
- 1987-10-21 KR KR1019870700960A patent/KR880700645A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0264387A1 (en) | 1988-04-27 |
| WO1987005471A1 (en) | 1987-09-24 |
| KR880700645A (en) | 1988-04-11 |
| EP0264387A4 (en) | 1988-08-04 |
| AU588193B2 (en) | 1989-09-07 |
| BR8706043A (en) | 1988-01-19 |
| ZA871842B (en) | 1988-11-30 |
| JPS63502841A (en) | 1988-10-20 |
| AU7126987A (en) | 1987-10-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |