EP0003603B1 - Verschlussmembran zum Verschliessen einer Dosenöffnung - Google Patents

Verschlussmembran zum Verschliessen einer Dosenöffnung Download PDF

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Publication number
EP0003603B1
EP0003603B1 EP79100395A EP79100395A EP0003603B1 EP 0003603 B1 EP0003603 B1 EP 0003603B1 EP 79100395 A EP79100395 A EP 79100395A EP 79100395 A EP79100395 A EP 79100395A EP 0003603 B1 EP0003603 B1 EP 0003603B1
Authority
EP
European Patent Office
Prior art keywords
membrane
tab
opening
closure
flat part
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
Application number
EP79100395A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0003603A1 (de
Inventor
Franco Del Bon
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0003603A1 publication Critical patent/EP0003603A1/de
Application granted granted Critical
Publication of EP0003603B1 publication Critical patent/EP0003603B1/de
Expired 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
    • B65D17/503—Flexible tape or foil-like material applied to the internal 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
    • 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
    • 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
    • B65D2517/5083—Details of hand grip, tear- or lift-tab with means facilitating initial lifting of tape, e.g. lift or pull-tabs

Definitions

  • the invention relates to a closure membrane for closing a can opening, which membrane has a flat part and peripherally adjoining it an edge zone which is intended to be hermetically sealed to the can, a recess being provided in the flat part of the membrane and this Recess is hermetically sealed by a piece of film attached to the underside of the membrane section.
  • a sealing membrane of this type is already known from CH-A-593 180.
  • this known closure membrane has the disadvantage that the flap tears in the collar part and the flat membrane part obliquely and irregularly and thereby tears off with a small part of the flat membrane part and part of the collar part, while the majority of the flat membrane part remains in its closed position. This must then be separated from the can wall with a finger or a knife or the like. Angled tearing off occurs especially when the tab is not pulled exactly radially with the finger, but slightly obliquely.
  • a closure membrane of the type described at the outset which is characterized in that a bent end of the film piece is inside / the recess and forms the tear-open tab, and that a longitudinal extension of the same underneath the tear-open tab forms the actual film piece closing the cutout and is so firmly connected to the underside of the flat membrane section that when the pull tab is pulled out, the entire flat membrane section is removed from the can opening up to a predetermined separation area, in particular a groove, located at the edge zone of the latter.
  • the tear-open tab provided can be produced in a simple manner and with little material expenditure.
  • the film part which carries the tear-open tab at one of its free ends is preferably guaranteed to be hermetically sealed in a simple manner by gluing or heat sealing to the underside of the flat part of the closure membrane.
  • the actual tear-open tab can be tongue-shaped and, in particular, have the shape of an isosceles triangle with an undulated tip, the continuing part of the tab forming the base of the triangle.
  • the transition of the actual tab to its extension is preferably parabolic at the point at which the part is bent.
  • the outside of the sealing membrane can be aluminum or silver-colored, while the inside can be colored, e.g. red, which is mostly due to the coating of the film with the sealing wax.
  • the film part forming the tear-open tab can be designed in a color so that the e.g. red underside after bending the free end of the tab, in the recess of e.g. silver-colored, flat part of the sealing membrane becomes visible in red and thus stands out clearly.
  • the recess in the flat part of the membrane which is preferably produced by punching out, can have the shape of an isosceles triangle with a rounded tip, the base of the triangle preferably extending along the circumferential zone which adjoins the flat part of the membrane.
  • the preferably rounded tip of the recess points towards the center of the flat membrane section.
  • the size and shape of the cutout may vary depending on the size and shape of the tear tab.
  • connection of the closure membrane to the film part, which carries the tear-open tab at its one free end is preferably carried out by gluing or sealing, the actual tab first being bent back onto its extension, and then the edges of the extension projecting on three sides with the recess surrounding edge on the underside of the flat membrane section.
  • the remaining side is double-layered due to the bent flap, and consequently, when this side is connected to the edge of the recess in the flat part of the membrane, it is double-bonded or sealed, so that ultimately three layers of the material come together.
  • This has the great advantage that, on the one hand, the tab is optimally anchored and is thus protected from tearing off, as occurs in previously known embodiments.
  • the three interconnected layers ensure that the sealing membrane has a very high level of strength at the point at which the tensile force acting upwards on the tab acts when the membrane is torn open, and the force is thus transferred directly to the desired separation area.
  • the entire area in which the tear force acts can be optimally reinforced with this embodiment of the invention.
  • the closure membrane according to the invention has the further advantage that the tear tab is easy to grasp.
  • the pull tab is clearly visible, and separate instructions for removing the membrane are completely unnecessary.
  • sealing membrane and the tear tab can preferably be made of aluminum or plastic film.
  • the blank of a membrane 10 shown in Fig. 1 consists of a circular disc made of a suitable material, e.g. an aluminum foil which is provided with a weakening in the form of a groove 11 arranged concentrically with the center of the pane C.
  • the membrane 10 has e.g. a wall thickness of 0.03 mm, while this wall thickness in the groove 11 is only about 0.02 mm.
  • the groove 11 surrounds a circular area, which forms the flat part 12 of the membrane 10 after deep drawing.
  • the flat part 12 is surrounded peripherally by an upwardly directed collar part 13 which carries at its upper end an annular flange part 14 intended for flanging.
  • a recess 15 is provided in the membrane 10 in the area which is intended to form the flat part 12, which has approximately the shape of an isosceles triangle shown with a rounded tip 16 and which tip 16 points towards the center of the pane C.
  • the base 17 of the recess 15 advantageously runs along and somewhat distant from the groove 11.
  • the transition from the tear-open tab 18 to its longitudinal extension 20 is preferably parabolic on the two sides 21 a, which results in excellent conditions for the welding or also the bonding during application.
  • a grip hole 21 can be punched out against the tip 19 of the tear tab 18.
  • this grip hole 21 offers optical advantages in connection with the selection of differently colored materials.
  • the grip hole 21 makes the other, preferably red, color of the top of the longitudinal extension 20 visible, which enables quick and easy recognition of the tear-open flap 18 and thus an immediate understanding of the entire opening process.
  • the edge zone of the membrane 10 forming the upward-facing collar part 13, which adjoins the groove 11 to the outside, is intended for hermetically sealed connection to the can peripheral wall 23 of a can 24, which peripheral wall is inserted into the can 24 via the plane E of the flat section 12 Membrane protrudes upwards.
  • the ring flange part 14 is flanged over the can peripheral wall 23 when the membrane 10 is inserted.
  • a lid (not shown) is now placed in the depression 26 formed by deep drawing in the closure membrane serving as a guarantee seal.
  • FIG. 4 shows how the longitudinal extension 20 of the tear-open tab 18 comes to lie with its edges under the circumferential region 27 of the recess 15 and is connected to it in a hermetically sealed manner. Due to the fact that the tip 19 of the tear-open tab 18 is not completely guided to the edge of the recess 15, the gap 28 widens.
  • the tear-open tab 18 Due to the advantageous arrangement of the tear-open tab 18, it can be easily gripped with the fingers and pulled upwards.
  • the groove 11 is torn first and when pulling further upwards and outwards on the tab 18, the flat part 12 of the membrane tears easily along the groove 11 from the collar part 13 and can be removed from the can opening 25.
  • the tear-off takes place cleanly along the groove 11 without parts of the flat membrane part 12 remaining on the wall, as is easily the case with the known sealing membranes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Closures For Containers (AREA)
EP79100395A 1978-02-15 1979-02-12 Verschlussmembran zum Verschliessen einer Dosenöffnung Expired EP0003603B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1645/78 1978-02-15
CH164578A CH623534A5 (pt) 1978-02-15 1978-02-15

Publications (2)

Publication Number Publication Date
EP0003603A1 EP0003603A1 (de) 1979-08-22
EP0003603B1 true EP0003603B1 (de) 1983-04-27

Family

ID=4215299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100395A Expired EP0003603B1 (de) 1978-02-15 1979-02-12 Verschlussmembran zum Verschliessen einer Dosenöffnung

Country Status (4)

Country Link
US (1) US4195748A (pt)
EP (1) EP0003603B1 (pt)
CH (1) CH623534A5 (pt)
DE (1) DE2965261D1 (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4557398A (en) * 1984-08-17 1985-12-10 International Paper Company End closure structure for a container
US4884751A (en) * 1988-04-13 1989-12-05 Lil' Duke Sprinkler, Inc. Lawn sprinkler
PL2366634T3 (pl) * 2010-03-18 2015-03-31 Ardagh Mp Group Netherlands Bv Zamknięcie łatwo otwieranego pojemnika i pojemnik wyposażony w takie zamknięcie

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR767573A (pt) * 1934-07-19
DE1607896A1 (de) * 1967-09-19 1971-10-21 Nat Can Corp Bechaelter
US3908857A (en) * 1974-10-15 1975-09-30 Continental Can Co Tape seal for container
US3990603A (en) * 1975-12-09 1976-11-09 Minnesota Mining And Manufacturing Company Easy open closure system
CH598063A5 (pt) * 1976-05-07 1978-04-28 Sandherr Max Ag
US4108330A (en) * 1977-06-08 1978-08-22 Minnesota Mining And Manufacturing Company Easy open container end assembly

Also Published As

Publication number Publication date
DE2965261D1 (en) 1983-06-01
EP0003603A1 (de) 1979-08-22
US4195748A (en) 1980-04-01
CH623534A5 (pt) 1981-06-15

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