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US3785522A - Lid for easy opening cans - Google Patents

Lid for easy opening cans Download PDF

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Publication number
US3785522A
US3785522A US00102761A US3785522DA US3785522A US 3785522 A US3785522 A US 3785522A US 00102761 A US00102761 A US 00102761A US 3785522D A US3785522D A US 3785522DA US 3785522 A US3785522 A US 3785522A
Authority
US
United States
Prior art keywords
lid
tab
panel
rivet
lid panel
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
Application number
US00102761A
Other languages
English (en)
Inventor
Gerard Prayer
Jean-Marie Ferrat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cebal GP
Original Assignee
Cebal GP
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cebal GP filed Critical Cebal GP
Application granted granted Critical
Publication of US3785522A publication Critical patent/US3785522A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/42—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions with cutting, punching, or cutter accommodating means
    • B65D17/46—Wires, strings or the like, e.g. rip cords
    • B65D17/462—Tearing-strips or -wires
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • B65D17/4011—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening completely by means of a tearing tab

Definitions

  • a lid for use in an easy open can including a lid panel provided with a weakened portion defining a tear line, a tab fixed to the lid panel near the tear line having an end portion adapted to cut. into the lid panel and a concave rib formed in the lid panel adjacent to the tab to permit deformation of the lid panel when the tab is lifted during the opening of the can to prevent the tab from breaking off the lid panel.
  • This invention relates to a lid for easy opening cans carrying a tab with a perforating point or nose, more particularly to the type of can which includes a single tearing line closed on itself, defining a detachable zone which covers all or a part only of the surface of the said lid whereby the initial rupturing of the tearing line is caused by rocking the tab about its fixing point and perforating the said tearing line by means of its piercing end or point.
  • Such cans still have certain disadvantages in that during transportation, incorrect handling can cause a premature rupturing of the tearing line, or at the moment of opening the can, an incorrect action by the consumer can cause the rivet, which normally fixes the pull tab to the can, to break off.
  • the force exerted on the tab to cause the opening movement is first transmitted to the fixing rivet.
  • the part of the metal which forms thisrivet has already been subjected to a certain stress at the time it is formed, the danger of the tab breaking off exists in this zone before starting the tearing operation on the lid.
  • FIG. 3 shows the application of the invention to a rectangular can
  • FIG. 4 shows the application of the invention to an oval can.
  • the concepts of the present invention involve forming a concave rib or depression in the lid panel in immediate proximity to the rivet and on the side opposite to the tearing line relative to the rivet.
  • This rib the depth of which is greater than the thickness of the lid, permits a deformation of the metal of the lid in the critical zone whenthe can is opened and thus prevents the rivet from being torn off.
  • the shape of the concave rib can be linear whereby the rib extends perpendicular to the longitudinal axis of the tab. However, it is preferably curved with the cen- 'ter of the radius of curvature being to one side of the vertical axis of the rivet or even coinciding with the latter; the groove then forms an arc of a circle surroundthe problem of the tab being broken off such cans.
  • this cut-out which surrounds the rivet, has a substantially horseshoe shape and the straight line which joins the two ends of the cut-out are situated between the rivet and the tearing line.
  • a second solution involves forming in the lid, a line of lesser resistance situated behind this rivet, that is to say, on the side opposite to the tearing line.
  • This weakened portion permits a small rupture in the lid during the opening maneuver if the tension in the metal becomes too great.
  • This solution which is completely satisfactory from a mechanical point of view, does however have certain practical disadvantages. Apart from an additional weakening of thelid, it provides a danger to the contents of the can during storage, because an accidental partial lifting of thetab without damaging the tearing line proper, canresultin the small weakening line being ruptured with the result that the rupture is not visible due to the fact that the said line is positioned beneath the tab.
  • FIG. 1 is a plan view ofthe lid according to the invention on a can which is circular in shape;
  • FIG. 2 is a diagrammatic section to a larger scale, taking the line llll of FIGJ;
  • This rib is deformed when the gripping ring is raised and facilitates the rocking movement of the tab. This increases the force with which the nose of the tab starts the tearing operation and, on the other hand, reduces to a minimum the part of the lid which rocks beneath its level at the moment of opening to thereby prevent the tab from being broken off.
  • the lid panel 1 is provided along its rim 2 with a tearing line 3 made according to one of the known methods.
  • the lid has in its center a depression 4 which gives a greater resistance to the lid and which permits the gripping ring 5 of the tab 6 to be more easily gripped.
  • This tab 6 is fixed to the lid 1 by an integral rivet 7, that is to say, by a rivet formed in the actual material of the lid; on the side opposite the gripping ring 5, the tab is formed with a pointed end or nose 8, which forms the perforating tip and which extends beyond the tearing line 3' by a distance d which is between 50 and microns.
  • the effect of the pointed end 8 extending beyond the tearing line 3 is to provide several advantages.
  • the precision required for the fixing of the tongue can be slightly less strict than if the nose has to be exactly perpendicular to the tearing line; when handling the can, the tearing line is protected at the most delicate position, that is to say, where a pressure exerted on the lid would cause the rupturing of the latter if the end of the tab were just above this line; and finally, with the opening of the lid, the nose first of all cuts into the unweakened metal and thus permits a certain force to be accumulated before reaching the tearing line.
  • the essential feature of the invention resides in a concave rib 9 formed in the lid close to the rivet 7.
  • the depth of this rib 9, which extends toward the interior, is greater than the thickness of the lid, its width preferably being about 2 millimeters.
  • rib 9 is kidney-shaped, in the form of an arc of a circle surrounding the rivet over about Referring to FIG. 2, the consequences arising from the presence of this rib 9 can be more easily understood.
  • the tab 6 By lifting the gripping ring, the tab 6 starts to be lifted and its first action consists of a pulling effect on the rivet 7, the force being transmitted first of all to the part 7a of the rivet, which is closest to the gripping ring 5. This part is thus pulled upwardly and with it lifts the lid.
  • the deformation of the rib 9 permits this lifting movement to be increased while avoiding any sudden tensions in the metal.
  • the tab has assumed an oblique position, the rib 9 being drawn out, thus giving play to the movement of the tab.
  • the lifting of the gripping ring is greater as the center of the rivet 7 is placed closer to the tearing line.
  • the nose 8 of the tab has started to cut into the subjacent part of the lid, pressing back the metal and thus enlarging the tearing line, which eventually gives way under the force exerted on the gripping ring at the other end of the tab.
  • the invention has been described by means of a can with a round lid and with a rib concentric to the rivet. However, the invention is useful with all the easy opening cans which use a tab having a nose which perforates a tearing line, and those using other forms of a rib providing flexibility.
  • FIG. 3 provides an example of a rectangular can, the cover of which has a rib 9' at a tangent to the rivet, the longitudinal axis of which is straight and perpendicular to the tongue.
  • FIG. 4 provides an example of an oval can, of which the cover has a rib 9" forming an arc of a circle, of which the center of curvature is situated between the rivet and the tearing line, on the straight line passing through the center of the rivet and the tip of the nose.
  • a lid for an easy open can comprising a lid panel including a weakened portion defining a tear line, a tab fixed to the lid panel near the tear line having an end portion adapted to cut into the lid panel, said tab being fixed to the panel by a rivet formed in the material fo the panel, and a concave rib formed in the lid panel directly adjacent to the rivet to permit deformation of the lid panel on lifting of the tab and thereby prevent the tab from breaking off the lid panel.
  • a lid for an easy open can comprising a removable lid panel defined by a score line having a relatively high residual, a pull-tab fixed to the panel by means of a rivet formed from the material of the panel and a concave rib formed in said panel directly adjacent to the rivet and displaced from said rivet base toward the center of said panel and thereby prevent the tab from breaking off the lid panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Insertion Pins And Rivets (AREA)
  • Closures For Containers (AREA)
  • Sheet Holders (AREA)
  • Sealing Devices (AREA)
US00102761A 1970-01-08 1970-12-30 Lid for easy opening cans Expired - Lifetime US3785522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7000589A FR2074598A1 (is) 1970-01-08 1970-01-08

Publications (1)

Publication Number Publication Date
US3785522A true US3785522A (en) 1974-01-15

Family

ID=9048774

Family Applications (1)

Application Number Title Priority Date Filing Date
US00102761A Expired - Lifetime US3785522A (en) 1970-01-08 1970-12-30 Lid for easy opening cans

Country Status (18)

Country Link
US (1) US3785522A (is)
JP (1) JPS5414554B1 (is)
AT (1) AT299057B (is)
BE (1) BE761274A (is)
CA (1) CA947677A (is)
CH (1) CH521891A (is)
DE (1) DE2100580B2 (is)
DK (1) DK129030B (is)
ES (1) ES164922Y (is)
FI (1) FI52198C (is)
FR (1) FR2074598A1 (is)
GB (1) GB1345714A (is)
IL (1) IL35960A (is)
LU (1) LU62379A1 (is)
NL (1) NL7100153A (is)
NO (1) NO130762C (is)
OA (1) OA03552A (is)
SE (1) SE361642B (is)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3915334A (en) * 1975-02-10 1975-10-28 Continental Can Co Rivet panel (bellow) for easy-o end unit rivet structure
US5713481A (en) * 1996-05-06 1998-02-03 Aluminum Company Of America Full panel pull out can end with vent means
USD421907S (en) * 1997-09-12 2000-03-28 Crown Cork & Seal Technologies Corporation Easy opening can end
US20040099665A1 (en) * 2002-11-27 2004-05-27 Mceldowney Carl F. Easy-opening can end and a conversion press and tools for producing the same
US20060010956A1 (en) * 2003-11-03 2006-01-19 Hajo Rieck Method for fixing the position of a tab having an anti-rotation bead formed from the panel of a sheet metal lid (steep anti rotation device)
US20060016815A1 (en) * 2003-11-03 2006-01-26 Hajo Rieck Anti rotation bead
US20060277966A1 (en) * 2003-01-13 2006-12-14 Hilary Clark Method for fixing the position of a pull-tab with a steep anti rotation device formed from the panel of a sheet metal cover
US20070062950A1 (en) * 2003-01-13 2007-03-22 Ball Packaging Europe Gmbh Fixing the position of a pull-tab with an anti rotation bead formed from the panel
CN109941564A (zh) * 2018-08-27 2019-06-28 济托赛文公司 粉末容器的密封盖
USD959980S1 (en) * 2020-05-11 2022-08-09 Stolle Machinery Company, Llc Ecology tab

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486495A1 (fr) * 1980-07-09 1982-01-15 Cebal Languette d'arrachage pour boite a ouverture facile et son procede de fabrication
FR2502122B1 (fr) * 1981-03-20 1985-07-05 Cebal Couvercle a ouverture facile, a languette d'arrachage et ligne d'incision
JPS60157616U (ja) * 1984-03-29 1985-10-21 東洋製罐株式会社 開口容易な蓋体
US4930658A (en) * 1989-02-07 1990-06-05 The Stolle Corporation Easy open can end and method of manufacture thereof
FR3088913B1 (fr) * 2018-11-27 2021-07-02 Ardagh Mp Group Netherlands Bv Couvercle pour un corps de contenant, en particulier pour un contenant du genre boîte de conserve
FR3088914B1 (fr) * 2018-11-27 2020-11-20 Ardagh Mp Group Netherlands Bv Couvercle pour un corps de contenant, en particulier pour un contenant du genre boîte de conserve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404801A (en) * 1967-04-21 1968-10-08 Fraze Ermal C Easy-opening container wall with scoreline vent
US3490643A (en) * 1968-01-22 1970-01-20 Dorn Co V Full opening container end
US3591037A (en) * 1969-02-24 1971-07-06 Aluminum Co Of America Container with removable panel portion

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416698A (en) * 1967-02-13 1968-12-17 Reynolds Metals Co Opening means for a container
US3430802A (en) * 1967-05-15 1969-03-04 American Can Co Easy-opening can

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404801A (en) * 1967-04-21 1968-10-08 Fraze Ermal C Easy-opening container wall with scoreline vent
US3490643A (en) * 1968-01-22 1970-01-20 Dorn Co V Full opening container end
US3591037A (en) * 1969-02-24 1971-07-06 Aluminum Co Of America Container with removable panel portion

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3915334A (en) * 1975-02-10 1975-10-28 Continental Can Co Rivet panel (bellow) for easy-o end unit rivet structure
US5713481A (en) * 1996-05-06 1998-02-03 Aluminum Company Of America Full panel pull out can end with vent means
USD421907S (en) * 1997-09-12 2000-03-28 Crown Cork & Seal Technologies Corporation Easy opening can end
US20040099665A1 (en) * 2002-11-27 2004-05-27 Mceldowney Carl F. Easy-opening can end and a conversion press and tools for producing the same
US20060277966A1 (en) * 2003-01-13 2006-12-14 Hilary Clark Method for fixing the position of a pull-tab with a steep anti rotation device formed from the panel of a sheet metal cover
US20070062950A1 (en) * 2003-01-13 2007-03-22 Ball Packaging Europe Gmbh Fixing the position of a pull-tab with an anti rotation bead formed from the panel
US7384227B2 (en) 2003-01-13 2008-06-10 Ball Packaging Europe Gmbh Method for fixing the position of a pull-tab with a steep anti rotation device formed from the panel of a sheet metal cover
US7926675B2 (en) 2003-01-13 2011-04-19 Ball Packaging Europe Gmbh Fixing the position of a pull-tab with an anti rotation bead formed from the panel
US20060016815A1 (en) * 2003-11-03 2006-01-26 Hajo Rieck Anti rotation bead
US20060010956A1 (en) * 2003-11-03 2006-01-19 Hajo Rieck Method for fixing the position of a tab having an anti-rotation bead formed from the panel of a sheet metal lid (steep anti rotation device)
US7165926B2 (en) 2003-11-03 2007-01-23 Hajo Rieck Method for fixing the position of a tab having an anti-rotation bead formed from the panel of a sheet metal lid (steep anti rotation device).
CN109941564A (zh) * 2018-08-27 2019-06-28 济托赛文公司 粉末容器的密封盖
USD959980S1 (en) * 2020-05-11 2022-08-09 Stolle Machinery Company, Llc Ecology tab
USD977970S1 (en) 2020-05-11 2023-02-14 Stolle Machinery Company, Llc Ecology tab

Also Published As

Publication number Publication date
SE361642B (is) 1973-11-12
DK129030C (is) 1975-01-20
NO130762C (no) 1977-10-27
JPS5414554B1 (is) 1979-06-07
FI52198C (fi) 1977-07-11
AT299057B (de) 1972-06-12
BE761274A (fr) 1971-07-06
IL35960A (en) 1974-05-16
CA947677A (en) 1974-05-21
ES164922Y (es) 1972-04-16
NO130762B (is) 1974-10-28
IL35960A0 (en) 1971-03-24
FI52198B (is) 1977-03-31
DE2100580A1 (de) 1971-10-07
LU62379A1 (is) 1971-07-30
DE2100580B2 (de) 1976-03-11
ES164922U (es) 1971-06-01
GB1345714A (en) 1974-02-06
DK129030B (da) 1974-08-12
FR2074598A1 (is) 1971-10-08
NL7100153A (is) 1971-07-12
CH521891A (fr) 1972-04-30
OA03552A (fr) 1971-03-30

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