US3441171A - Easy-opening container panel structure - Google Patents

Easy-opening container panel structure Download PDF

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Publication number
US3441171A
US3441171A US712198A US3441171DA US3441171A US 3441171 A US3441171 A US 3441171A US 712198 A US712198 A US 712198A US 3441171D A US3441171D A US 3441171DA US 3441171 A US3441171 A US 3441171A
Authority
US
United States
Prior art keywords
removable panel
pull tab
panel
weakening line
rectangular
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
US712198A
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English (en)
Inventor
Frederick J Stec
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.)
Continental Can Co Inc
Original Assignee
Continental Can Co Inc
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 Continental Can Co Inc filed Critical Continental Can Co Inc
Application granted granted Critical
Publication of US3441171A publication Critical patent/US3441171A/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
    • B65D17/28—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 pull tab is secured to the removable panel portion and includes a penetrating nose which, upon tilting of the pull tab, initiates the severance of the weakening line. Further upward pulling of the pull tab completely separates the removable panel portion from the cover panel.
  • a central rectangular depression is formed in the panel and arcuate beads are formed about each of the corners of the central depression for reducing the flexure of the removable panel portion.
  • the present invention relates to easy-open containers and more particularly to a new and improved container cover member having a removable panel structure of the full opening type.
  • Removable panel structures of the full opening type are usually formed by scoring the panel.
  • the scoring provides a weakening line along which the removable panel section is separated from the cover panel.
  • a pull tab is suitably pivotally mounted thereon.
  • the pull tab includes a body portion having a penetrating end and a finger grip portion extending from the body portion.
  • the pull tab is disposed on the removable panel portion so that the tab body is superposed over a portion of the removable panel portion which is coplanar with the remaining cover panel.
  • the finger portion is disposed in a central depression formed in the removable panel portion.
  • the tab body is formed with a penetrating nose which overlies the weakening line and serves to penetrate the latter along a localized area upon upward lifting of the rfinger grip portion. After the initial separation, the pull tab is pulled upwardly So that the remainder of the weakening line is severed and the removable panel portion separated from the cover panel.
  • Scoring of the panel to form the weakening line causes considerable displacement of metal inwardly into the removable panel portion resulting in undesirable flexure thereof.
  • circular removable sections it has been common practice to reduce the flexure by the provision of a coaxially disposed circular depression formed in the removable panel section.
  • the depression forms in the nature of a well into which the finger grip portion of the pull tab extends as described above.
  • the coaxial circular depression was adequate to reduce and substantially eliminate the flexure because of a uniform displacement of the metal resulting from the circular weakening line.
  • the problem of eliminating the flexure is particularly troublesome when the removable panel section is formed as a rectangle.
  • the presence of the corners in the rectangular removable panel section causes a nonuniform displacement of the metal so that a greater portion of the displaced metal is located at the corners.
  • a rectangular depression to accommodate the loose metal would "ice occupy a major portion of the removable panel portion so that only a limited surface area remains coplanar with the panel surface. This causes difficulties in mounting the pull tab, so that the length of the tab body is not completely supported on the removable panel section when in the nonuse position.
  • FIG. 1 is a top plan view of the container and cover member embodying the structure of the present invention
  • FIG. 2 is a fragmentary cross-sectional view of the upper end of the container and the container cover member. taken generally along the lines 22 of FIG. 1;
  • FIG. 3 is a cross-sectional view taken generally along the lines 33 of FIG. 1.
  • FIG. 2 there is illustrated in FIG. 2 a conventional type container 10 of substantially obround cross-section and having mounted on the open end thereof a cover member 11 incorporating the structure of the present invention.
  • Obround as used herein is intended to define a generally rectangular shape of which the sides of greater length are arcuate and the sides of lesser length are substantially straight and the corners are rounded as shown in FIG. 1.
  • the container 10 includes a container body 12 which may be formed of any suitable self-supporting material such as metal, cardboard or a composite thereof. Fixed to the open end of the container as by means of a single seam 13 is the cover member 11.
  • the cover member 11 is formed of metal and includes a chuck wall 14 extending upwardly from a cover panel 16.
  • the cover panel 16 includes a removable panel portion 17 of substantially rectangular contour and to which a pull tab 19 is attached as by means of a rivet 18.
  • the pull tab 19 functions as a lever to initially fracture the removable panel portion along a weakening line 21.
  • the weakening line 21 is formed in the cover panel 16 by a punching or scoring operation utilizing a standard type of scoring die.
  • the resultant weakening line 21, as shown in FIG. 2, is of a generally trapezoidal cross-section.
  • an antifracture line 22 Disposed inwardly of the weakening line 21 and extending continuously about the removable panel portion 17 is an antifracture line 22 which is also formed by scoring and is of substantially the same shape but of lesser depth than the weakening line 21.
  • the scoring means for forming antifracture line 22 is preferably incorporated on the same scoring die as used for the weakening line 21. Formation of the weakening line 21 and antifract-ure line 22 causes material to be displaced inwardly into the removable panel section 17, creating undesirable looseness and flexing thereof.
  • the loose material is particularly prevalent in the corners of the rectangular removable panel portion 17.
  • a central depression 23 is formed in the removable panel 17. As shown, the depression 23 is shaped similarly to the configuration of the weakening line 21 and contour of the rectangular container body 12. However, the central depression 23 in the proportion shown is inadequate to sufiiciently reduce the undesirable looseness and fiexure of material in the corners.
  • the pull tab 19 includes a body portion 24 and a finger portion 26.
  • the body portion 24 is disposed on the undepressed portion 28 of the removable panel section 17 and connected thereto by the rivet 18 so as to lie flush thereon in the nonuse position as shown.
  • the rivet 18 is preferably formed integral with the removable panel portion 17.
  • the body portion 24 is formed with a penetrating nose 29 which severs the weakening line 21 upon tilting of the pull tab 19 about a hinge line 31 defined between the ends of a U-shaped lance 32. To prevent rocking of the pull tab in its non-use position, It is essential that the body portion 24 lie flush on the undepressed surface of the removable panel section.
  • the displaced metal in the corners is removed by indentations 33 at each of the corners.
  • the indentations 33 are in the form of arcuate beads symmetrically disposed between each of the respective corners of the removable panel portion 17 and the rectangular depression 23.
  • the arcuately disposed beads 33 are dimensioned so that the ends of the pairs extending toward the pull tab 19 are spaced a distance sufiicient to accom- 4 modate the body portion 24 therebetween. In this manner sufficient fiat surface areas is available on the removable panel portion 23 to support tab body portion against rocking movement.
  • said easy-opening cover member comprising a panel, a rectangular removable panel portion defined by a weakening line formed by scoring said cover panel, a rectangular depression formed in said panel and located in the center of said removable panel section with the sides thereof disposed substantially parallel for reducing the flexure of the latter resulting from the formation of said scored weakening line, a pull tab including a body portion and a finger grip portion, means securing said pull tab to said removable panel portion with said body portion disposed between one side of said rectangular depression and an adjacent parallel side of said removable panel portion and with said finger portion disposed in said rectangular depression, and indentations formed in said removable panel section at each of the corners of said rectangular depression for further reducing the fieXure caused by said scored weakening line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Closures For Containers (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Cartons (AREA)
US712198A 1968-03-11 1968-03-11 Easy-opening container panel structure Expired - Lifetime US3441171A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71219868A 1968-03-11 1968-03-11

Publications (1)

Publication Number Publication Date
US3441171A true US3441171A (en) 1969-04-29

Family

ID=24861142

Family Applications (1)

Application Number Title Priority Date Filing Date
US712198A Expired - Lifetime US3441171A (en) 1968-03-11 1968-03-11 Easy-opening container panel structure

Country Status (5)

Country Link
US (1) US3441171A (de)
DE (1) DE1809000C3 (de)
ES (1) ES146471Y (de)
GB (1) GB1219061A (de)
SE (1) SE338012B (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576272A (en) * 1969-06-30 1971-04-27 Procter & Gamble Score-line structure
US3591037A (en) * 1969-02-24 1971-07-06 Aluminum Co Of America Container with removable panel portion
US3653536A (en) * 1970-08-31 1972-04-04 Aluminum Co Of America Easy opening device for a rectangular container end
US3715050A (en) * 1971-02-25 1973-02-06 American Can Co Full panel easy open end
US3858754A (en) * 1973-10-29 1975-01-07 Nat Can Corp Container end with pre-bulge
DE2555759A1 (de) * 1975-02-10 1976-08-19 Continental Can Co Aufreissbehaelter, insbesondere dose aus blech
EP0171650A2 (de) * 1984-08-17 1986-02-19 Schmalbach-Lubeca AG Deckel aus Blech, insbesondere langovale Dosen im z.B. Hansa-Format
EP0218096A1 (de) * 1985-10-02 1987-04-15 Schmalbach-Lubeca AG Deckel aus Blech für unrunde Dosen, insb. langovale Dosen im Hansa-Format
WO1991018796A1 (en) * 1990-06-08 1991-12-12 Weirton Steel Corporation Convenience-feature non-circular end closure with interrupted panel profiling
US5169017A (en) * 1990-09-05 1992-12-08 H. J. Heinz Company Can end closure apparatus
USD405010S (en) * 1994-11-03 1999-02-02 Schmalbach-Lubeca Ag Can lid
US20050178379A1 (en) * 2004-01-14 2005-08-18 Michael Weinberger Alcohol gel fireplace burner
US20110006065A1 (en) * 2007-12-24 2011-01-13 Impress Group B.V. Can, Panel for a Can and a Method for Making Such a Panel for Can
US20170361976A1 (en) * 2014-12-01 2017-12-21 Ardagh Mp Group Netherlands B.V. Closure for a container and a container provided therewith
GB2580900A (en) * 2019-01-23 2020-08-05 Crown Packaging Technology Inc Easy open end with increased panel stiffness
USD896076S1 (en) * 2017-11-28 2020-09-15 A&R Carton Lund Aktiebolag Membrane for packaging

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232474A (en) * 1963-09-24 1966-02-01 Aluminum Co Of America Opening means for sealed containers
US3366270A (en) * 1966-05-27 1968-01-30 Continental Can Co Pull tab for easy opening can end

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232474A (en) * 1963-09-24 1966-02-01 Aluminum Co Of America Opening means for sealed containers
US3366270A (en) * 1966-05-27 1968-01-30 Continental Can Co Pull tab for easy opening can end

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591037A (en) * 1969-02-24 1971-07-06 Aluminum Co Of America Container with removable panel portion
US3576272A (en) * 1969-06-30 1971-04-27 Procter & Gamble Score-line structure
US3653536A (en) * 1970-08-31 1972-04-04 Aluminum Co Of America Easy opening device for a rectangular container end
US3715050A (en) * 1971-02-25 1973-02-06 American Can Co Full panel easy open end
US3858754A (en) * 1973-10-29 1975-01-07 Nat Can Corp Container end with pre-bulge
DE2555759A1 (de) * 1975-02-10 1976-08-19 Continental Can Co Aufreissbehaelter, insbesondere dose aus blech
EP0171650A2 (de) * 1984-08-17 1986-02-19 Schmalbach-Lubeca AG Deckel aus Blech, insbesondere langovale Dosen im z.B. Hansa-Format
EP0171650A3 (en) * 1984-08-17 1987-04-22 Schmalbach-Lubeca Ag Tinplate cover for containers with an elongate oval section, in particular for "hansa-format" containers
EP0218096A1 (de) * 1985-10-02 1987-04-15 Schmalbach-Lubeca AG Deckel aus Blech für unrunde Dosen, insb. langovale Dosen im Hansa-Format
WO1991018796A1 (en) * 1990-06-08 1991-12-12 Weirton Steel Corporation Convenience-feature non-circular end closure with interrupted panel profiling
US5169017A (en) * 1990-09-05 1992-12-08 H. J. Heinz Company Can end closure apparatus
USD405010S (en) * 1994-11-03 1999-02-02 Schmalbach-Lubeca Ag Can lid
US20050178379A1 (en) * 2004-01-14 2005-08-18 Michael Weinberger Alcohol gel fireplace burner
US20110006065A1 (en) * 2007-12-24 2011-01-13 Impress Group B.V. Can, Panel for a Can and a Method for Making Such a Panel for Can
AU2008340651B2 (en) * 2007-12-24 2013-10-17 Impress Group B.V. Can, panel for a can and a method for making such a panel for can
US20170361976A1 (en) * 2014-12-01 2017-12-21 Ardagh Mp Group Netherlands B.V. Closure for a container and a container provided therewith
US10618685B2 (en) * 2014-12-01 2020-04-14 Ardagh Mp Group Netherlands B.V. Closure for a container and a container provided therewith
USD896076S1 (en) * 2017-11-28 2020-09-15 A&R Carton Lund Aktiebolag Membrane for packaging
GB2580900A (en) * 2019-01-23 2020-08-05 Crown Packaging Technology Inc Easy open end with increased panel stiffness
GB2580900B (en) * 2019-01-23 2021-05-19 Crown Packaging Technology Inc Can end with ribs to increase panel stiffness
US12084225B2 (en) 2019-01-23 2024-09-10 Crown Packaging Technology, Inc. Easy open end with increased panel stiffness

Also Published As

Publication number Publication date
SE338012B (de) 1971-08-23
GB1219061A (en) 1971-01-13
ES146471U (es) 1969-06-16
ES146471Y (es) 1970-03-01
DE1809000A1 (de) 1969-09-25
DE1809000C3 (de) 1980-11-13
DE1809000B2 (de) 1980-03-27

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