US3730377A - Pull tab end for can - Google Patents

Pull tab end for can Download PDF

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Publication number
US3730377A
US3730377A US00234065A US3730377DA US3730377A US 3730377 A US3730377 A US 3730377A US 00234065 A US00234065 A US 00234065A US 3730377D A US3730377D A US 3730377DA US 3730377 A US3730377 A US 3730377A
Authority
US
United States
Prior art keywords
membrane
article
raw edge
plastic
orifice
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
US00234065A
Other languages
English (en)
Inventor
R Brincks
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.)
Rexam Beverage Can Co
Original Assignee
American Can Co
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 American Can Co filed Critical American Can Co
Application granted granted Critical
Publication of US3730377A publication Critical patent/US3730377A/en
Assigned to AMERICAN NATIONAL CAN COMPANY reassignment AMERICAN NATIONAL CAN COMPANY MERGER (SEE DOCUMENT FOR DETAILS). Assignors: AMERICAN CAN PACKAGING INC., NATIONAL CAN CORPORATION (CHANGED TO), TRAFALGAR INDUSTRIES, INC. (MERGED INTO)
Assigned to AMERICAN CAN PACKAGING INC. reassignment AMERICAN CAN PACKAGING INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AMERICAN CAN COMPANY, A NJ CORP.
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
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/501—Flexible tape or foil-like material
    • B65D17/502—Flexible tape or foil-like material applied to the external part of the container wall only
    • 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
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/506—Rigid or semi-rigid members, e.g. plugs
    • B65D17/507—Rigid or semi-rigid members, e.g. plugs moulded in situ, e.g. during production of container
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/001—Action for opening container
    • B65D2517/0013—Action for opening container pull-out tear panel, e.g. by means of a tear-tab
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/0059—General cross-sectional shape of container end panel
    • B65D2517/0061—U-shaped
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/5002—Details of flexible tape or foil-like material
    • B65D2517/5024—Material
    • B65D2517/5027—Single layer
    • B65D2517/5029—Single layer and connected to container by local areas of adhesive
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/504—Details of preformed openings
    • B65D2517/5043—Details of preformed openings provided with a flange
    • B65D2517/5051—Up-turned flange, i.e. extending away from container
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/5072—Details of hand grip, tear- or lift-tab
    • B65D2517/5075—Hand grip with finger opening
    • B65D2517/5081—Hand grip with finger opening the hand grip formed as an annular or U-shaped element

Definitions

  • Appl' 234065 A pull tab can end which exposes substantially no raw edge to create a hazard to the user.
  • the end has an 52 U.S.Cl. ..220/27,220/53,220/54, orifice Whose p p y is defined y a raw edge 220/906 turned upward.
  • a membrane lies over the raw edge 51 Int. Cl. ..B65d 17/24 and the mifm when the end is waned
  • Fi d d of Search 220/27 54 53 90 remains a portion of the membrane on the'end which 5 2 surrounds the exposed raw edge, thus preventing the user from cutting himself.
  • the present invention relates to can ends for dispensing fluids and more particularly to a novel conends.
  • cans for dispensing liquid foods or similar articles with tear strip devices which permit the opening of the can without the use of can openers.
  • cans have been equipped with tear strips or tabs mounted on the end which are pulled away from the end exposing an opening through which the liquid contents may be poured.
  • tear strips are retained in the end by partially cutting through a portion of the end made of aluminum and providing a finger engageable tab which can be pulled to tear away said portion of the end.
  • the jagged, exposed raw edges of the metal result in many cuts and injuries to the user.
  • the instant invention is designed to eliminate the problem of exposed, raw edges by having the raw edges of the dispensing orifice upturned so that upon opening of the end, the raw edges are substantially surrounded by the remaining portion of the membrane used to close the dispensing orifice.
  • Another advantage of the present invention is the elimination of a metal tab which might also injure consumers.
  • the instant invention provides a can end comprising a fiat, metal panel having an orifice whose periphery is defined by a raw edge turned in the upward direction and a membrane bonded to the upwardly turned raw edge and to the portion of the exterior surface of said panel adjacent said orifice and closing said orifice, said membrane having a manually engageable tab extending I therefrom, the upwardly turned raw edge forming a sharp cutting edge against the membrane.
  • FIG. 1 is a perspective view of an unopened can end embodying the present invention.
  • FIG. 2 is a perspective view of the can end of FIG. 1 after it has been opened.
  • FIG. 3 is an enlarged, sectional view taken on the vertical plane indicated by the line 33 of FIG. 1.
  • FIG. 4 is an enlarged, sectional view taken on the vertical plane indicated by the line 44 of FIG. 2.
  • FIG. 5 is an enlarged, vertical sectional view taken on the plane indicated by the line 5-5 of FIG. 1.
  • FIG. 6 is an enlarged vertical sectional view taken on the plane indicated by the line 66 of FIG. 2.
  • FIG. 1 illustrates a can end 11 mounted on a conventional can body 13.
  • the end 11 comprises a flat, metal panel 15 which has an orifice 17 for dispensing the contents of the can body 13.
  • the orifice 17 may be of anydesired size and shape, the illustrated form being substantially rectangular with rounded inner comers l9 and rounded outer corners 21.
  • the inner portion of the struction of a pull tab and dispensing orifice for such orifice 17 is approximately in the center of the end panel 15, while the outer portion of the orifice 17 extends almost to the edge of the panel 15.
  • the orifice 17 is pierced and formed to produce an upwardly extending raw edge 23. Such a forming process is conventional with certain types of manufacturing operations.
  • the membrane 25 includes a manually engageable pull tab 27 which lies free of the panel 15.
  • the bonding must be accomplished by heat sealing or a heat activated adhesive. If bonding is to be achieved by heat sealing, it may be desirable that at least the portion of the panel 15 contact with the membrane 25 be coated with a suitable material in order to form a very tight bond at the interface of the panel 15 and membrane 25.
  • the membrane 25 can be made from a variety of materials. The only requirement is that the membrane material have controlled strength properties (for reasons explained below) and, if bonding is to be achieved through heat sealing, that the basic resin is of a sufficient percentage to form a strong bond to a suitable coating or basic metal.
  • a preferred material for the membrane 25 is a copolymer resin of polyethylene copolymerized with acrylic acid blended with inexpensive fillers such as talc and silica to reduce the cohesive properties of the basic resin.
  • the membrane 25 lies over and surrounds the raw edge 23. It is necessary when the membrane 25 is plastic that said membrane 25 be heated in some manner in order that it might attain the flow characteristics required to achieve the desired surrounding of the raw edge 23.
  • FIG. 1 wherein there are seen two tear lines 29 completely cut through the portion of the membrane 25 adjacent the tab 27.
  • the membrane 25 cohesively separates from the panel 15 in the area between said tear lines 29.
  • tearing and cohesive separation continue until the inner corners 19 are reached.
  • Further application of the pull force results in tearing of the membrane 25 along the raw edge 23, which in effect creates a score line of weakening in the membrane 25 by virtue of the raw edge 23 forming a sharp, cutting edge against the membrane 25
  • FIGS. 2, 4 and 6 once the panel 15 has been opened, the raw edge is substantially covered by the portion of the membrane 25 remaining bonded to the panel 15. Only the small portion of the raw edge 23 between the inner corners '19 is exposed, and since this portion is small and remote from the periphery of the panel 15, it is unlikely to be of concern to the consumer.
  • the membrane 25 could comprise a metal foil gas permeation barrier sandwiched into the membrane material, or any laminate that has low gas permeation, such as Dow Chemicals Saranex (polyvinylidene chloride sandwiched between polyethylene).
  • a can end comprising:
  • a membrane bonded to the raw edge and to the portion of the exterior surface of said panel adjacent said orifice, said membrane closing said orifice, and said membrane having a manually engageable pull tab extending therefrom, the upwardly turned raw edge forming a sharp, cutting edge against the membrane.
  • the article of claim 3 further comprising means for cohesively separating the portion of the membrane between the tab and the proximate raw edge.
  • said means comprises a pair of tear lines extending from the periphery of the tab proximate the raw edge to points adjacent but spaced from the raw edge.
  • the plastic membrane comprises a copolymer resin of polyethylene copolymerized with acrylic acid blended with talc and silica.
  • the membrane comprises polyvinylidene chloride sandwiched between polyethylene.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Closures For Containers (AREA)
US00234065A 1972-03-13 1972-03-13 Pull tab end for can Expired - Lifetime US3730377A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23406572A 1972-03-13 1972-03-13

Publications (1)

Publication Number Publication Date
US3730377A true US3730377A (en) 1973-05-01

Family

ID=22879747

Family Applications (1)

Application Number Title Priority Date Filing Date
US00234065A Expired - Lifetime US3730377A (en) 1972-03-13 1972-03-13 Pull tab end for can

Country Status (7)

Country Link
US (1) US3730377A (pt)
JP (1) JPS5513238Y2 (pt)
BR (1) BR7301780D0 (pt)
CA (1) CA994259A (pt)
FR (1) FR2175856B1 (pt)
GB (1) GB1391895A (pt)
IT (1) IT988134B (pt)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966081A (en) * 1973-07-13 1976-06-29 Nihon Seikan Kabushiki Kaisha Seal for can or like container
US4818459A (en) * 1984-02-15 1989-04-04 Tetra Pak Developpement S.A. Lid of a liquid pack with process and apparatus for producing the same
EP0312310A1 (en) * 1987-10-15 1989-04-19 CMB Foodcan plc Metal can ends with plastics closures

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281024A (en) * 1964-05-20 1966-10-25 Continental Can Co Easy opening container end and closure member therefor
US3610462A (en) * 1969-07-17 1971-10-05 Nat Steel Corp Container scoreline and tear edge protection

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870935A (en) * 1955-01-27 1959-01-27 Suzanne Kaaren Blackmer Container seal
FR1392851A (fr) * 1964-04-06 1965-03-19 Fr Hesser Maschinenfabrik Ag F Fermeture à arrachement pour récipient d'emballage à contenu liquide ou pulvérulent
FR1521273A (fr) * 1967-05-02 1968-04-12 Continental Can Co Perfectionnements aux boîtes à ouverture rapide

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3281024A (en) * 1964-05-20 1966-10-25 Continental Can Co Easy opening container end and closure member therefor
US3610462A (en) * 1969-07-17 1971-10-05 Nat Steel Corp Container scoreline and tear edge protection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966081A (en) * 1973-07-13 1976-06-29 Nihon Seikan Kabushiki Kaisha Seal for can or like container
US4818459A (en) * 1984-02-15 1989-04-04 Tetra Pak Developpement S.A. Lid of a liquid pack with process and apparatus for producing the same
EP0312310A1 (en) * 1987-10-15 1989-04-19 CMB Foodcan plc Metal can ends with plastics closures
WO1989003349A1 (en) * 1987-10-15 1989-04-20 Mb Group Plc Metal can ends with plastics closures

Also Published As

Publication number Publication date
GB1391895A (en) 1975-04-23
IT988134B (it) 1975-04-10
JPS5513238Y2 (pt) 1980-03-25
FR2175856B1 (pt) 1977-04-22
BR7301780D0 (pt) 1974-07-25
FR2175856A1 (pt) 1973-10-26
CA994259A (en) 1976-08-03
JPS48111560U (pt) 1973-12-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: AMERICAN NATIONAL CAN COMPANY, STATELESS

Free format text: MERGER;ASSIGNORS:AMERICAN CAN PACKAGING INC.;TRAFALGAR INDUSTRIES, INC. (MERGED INTO);NATIONAL CAN CORPORATION (CHANGED TO);REEL/FRAME:004835/0354

Effective date: 19870430

Owner name: AMERICAN NATIONAL CAN COMPANY

Free format text: MERGER;ASSIGNORS:AMERICAN CAN PACKAGING INC.;TRAFALGAR INDUSTRIES, INC. (MERGED INTO);NATIONAL CAN CORPORATION (CHANGED TO);REEL/FRAME:004835/0354

Effective date: 19870430

Owner name: AMERICAN CAN PACKAGING INC., CONNECTICUT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AMERICAN CAN COMPANY, A NJ CORP.;REEL/FRAME:004835/0338

Effective date: 19861107

Owner name: AMERICAN CAN PACKAGING INC., AMERICAN LANE, GREENW

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMERICAN CAN COMPANY, A NJ CORP.;REEL/FRAME:004835/0338

Effective date: 19861107