US3863801A - Full-open end with cambered tab - Google Patents

Full-open end with cambered tab Download PDF

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Publication number
US3863801A
US3863801A US383186A US38318673A US3863801A US 3863801 A US3863801 A US 3863801A US 383186 A US383186 A US 383186A US 38318673 A US38318673 A US 38318673A US 3863801 A US3863801 A US 3863801A
Authority
US
United States
Prior art keywords
tab
panel
handle portion
removable panel
central wall
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
US383186A
Other languages
English (en)
Inventor
Burton Frank Pillnik
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.)
Primerica Inc
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
Priority to US383186A priority Critical patent/US3863801A/en
Priority to GB2072074A priority patent/GB1458425A/en
Priority to AU68811/74A priority patent/AU477563B2/en
Priority to CA203,460A priority patent/CA1008002A/en
Priority to JP1974077422U priority patent/JPS5353659Y2/ja
Priority to AT612574A priority patent/AT340306B/de
Priority to IT52297/74A priority patent/IT1018732B/it
Application granted granted Critical
Publication of US3863801A publication Critical patent/US3863801A/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

  • ABSTRACT An improvement in a can end closure having a substantially flat, imperforate central wall with a peripheral flange adapted to be interfolded with an edge flange of a can body to form a double-seam whose top portion is disposed above the central wall, a peripheral score defining a removable panel in the central wall, and an opening tab having a nose portion at the outer end adjacent the peripheral score and a handle portion at the inner end thereof, said tab being secured to the removable panel by a securement adjacent the nose portion.
  • the improvement inhibits the raising of the tab when internal pressure is applied to the can and comprises a chamber and stress in the tab extending from at least about the securement to about the handle portion and a corresponding raised area of stress in the panel disposed beneath the cambered area of the tab.
  • the stress in the raised area of the panel is caused by the cambered tab, after its being fastened to the panel, seeking to revert to its unstressed position existing prior to its fastening to the panel.
  • the instant invention relates to full open ends, and more particularly to full open ends having a tab secured to a removable panel portion of the end.
  • full-open can in which a peripheral score, generally circular in configuration, is formed in the end panel at or adjacent the periphery thereof to permit its complete removal.
  • Full-open cans are to be distinguished from those self-opening cans which have a comparatively small removable section, which when separated, provide a comparatively small aperture for dispensing the product. The latter are generally appropriate for packaging beer, other beverages and other liquids which are to be poured from the container.
  • Full-open cans are suitable for packaging solid products which are customarily removed by inserting a hand or a spoon or a measuring cup into the container and for products which require a large opening if they are to be removed without mutilation.
  • Candy, shell nuts, meats, ground coffee, solid or chunky products such as processed frozen vegetables, fruits, frozen fruitjuices, sausages and other meat products are examples of products which are suitable for packaging in full-open cans.
  • an opening tab is positioned close enough to the peripheral score so that when its inner end is rocked upwardly to cause its outer end to move downwardly and exert a downward force on the end panel at or near the peripheral score, a portion of the end panel is bent downwardly to initiate rupture of the peripheral score. Thereafter an upward and backward pull on the opening tab by the user induces tearing of the metal in the score on both sides of the area of initial rupture to effect the complete detachment from the end of the removable section of the end which is defined by the peripheral score.
  • the instant invention provides an improvement in a can end closure having a substantially flat, imperforate central wall with a peripheral flange adapted to be interfolded with an edge flange of a can body to form a double seam whose top portion is disposed above the central wall, a peripheral score defining a removable panel in the central wall and an opening tab having a nose portion at the outer end adjacent the peripheral score and a handle portion at the inner end thereof, said tab being secured to the removable panel by a securement adjacent the nose portion.
  • the improvement comprises a camber and stress in the tab extending from at least about the securement to about the handle portion and a corresponding raised area of stress in the panel disposed beneath the cambered area of the tab.
  • FIG. 1 is a top plan view of a full open end of the instant invention.
  • FIG. 2 is a sectional view taken on the vertical plane indicated by the line 2-2 of FIG. 1.
  • FIG. 3 is a 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 4-4 of FIG. 1.
  • FIG. 5 is a partial, enlarged, vertical sectional view of the end shown in FIG. 1 after it has been doubleseamed onto a can body and subjected to increased internal pressure.
  • FIGS. 1 and 4 of the drawings illustrate a can end closure indicated generally as 10, and made in accordance with the instant invention.
  • the end closure 10 is formed with a substantially flat imper-forate central wall 12 and has an edge curled peripheral flange I4 which is adapted to be interfoldcd with an edge flange l6 on a can body I8 to form a double seam 20 as shown in FIG. 5.
  • the bottom end of the can body I8 is closed in any suitable manner. as by seaming a conventional end (not shown) thereto, or if desired, by an end wall (not shown) formed as an integral part of the body 18.
  • the top portion 24 of the double-seam 20 is disposed above the central wall 12.
  • a peripheral score 30 which is indented into the metal and defines a removable panel 31 with parallel ribs 22, the panel 31 including most of the wall 12.
  • Parallel and coextensive with the peripheral score 30 is an auxiliary score 26 of less depth and within the peripheral score 30.
  • a stiff, non-bendable opening tab 32 Positioned proximate to scores 30 and 26 and within the removable panel 31 is a stiff, non-bendable opening tab 32 having a curved peripheral edge 33, and at its inner end a handle portion 34.
  • the opening tab 32 has at its outer end a nose portion 36, and a flat-web portion 38 which extends between the nose portion 36 and the handle portion 34.
  • the pull tab 32 is joined to the removable panel 31 by a suitable securement, preferably by a rivet 40 which is formed integral with the removable panel 31, and extends through a rivet hole in the flat-web portion 38 of the pull tab 32.
  • the rivet 40 (see FIG. 5) has an annular side-wall 42 which merges at its top into a transverse wall 44 having about its periphery an annular head 46 which extends over the flat-web portion 38 of the opening tab 32 to secure the opening tab 32 to the removable panel 31.
  • ancillary score 48 In the outer edge portion of the removable panel 31 (see FIG. 1) is a generally chordally extending ancillary score 48 having a curved central portion 50 which passes immediately inward of the rivet 40.
  • the score 48 also includes straight segments 52 and 54 which extend outwardly from the curved portion 50 and diametrically of the rivet 40.
  • the metal between the ancillary score 48 and the peripheral score 30 forms a pivotable section 60.
  • the final step in the opening operation is an upward and backward pull on the opening tab to cause the tear in the peripheral score 30 to continue to extend in both directions around that score for 360 degrees to completely detach the removable panel 31 from the central wall 12, thus completing the opening of the can.
  • the instant invention overcomes this problem by rotating the rivets axis to position b as soon as it is fastened to the removable panel 31.
  • This is achieved by the use of a camber or bend 70, in the tab 32, extending from about the starts 80 and 82 of the curved peripheral edge 33 to the midpoints of the two opposing sides at 72 and 74 of the handle portion 34 of the tab 32. Only these four points of the tab 32 contact the removable panel 31.
  • the tab 32 is first formed it is made with more camber than what is illustrated in FIG. 4 which shows the tab 32 and the end 10 after they have been securely fastened together. Before the tab 32 is fastened to the end 10 the axis 12 of the rivet 40 is parallel to the can axis a.
  • the tab camber 70 is temporarily reduced (flattened) so that the tab 32 can be slipped over the rivet 40 while it is in normal axis position b.
  • the transverse wall 44 of the rivet 40 is then formed. securely fastening the tab 32 to the removable panel 31.
  • the elastic limit of the tab material is not exceeded.
  • the tab 32 is under stress and attempts to revert to its original, larger camber while still contacting the removable panel 31 at points 80, 82, 72 and 74, and in so doing rotates the axis of the rivet to position b as shown in FIGS. 4 and 5.
  • the rivet axis can rotate slightly from position b to b" but the tab will still contact the removable panel 31 at points 80, 82, 72, and 74 owing to the sufficiently great camber 70 and stress.
  • the tab 32 is thereby prevented from rising above the top por- 'tion 24 of the double seam 20 on a pressurized can.
  • the invention still achieves the objective of preventing the tab 32 from rising above the double seam 20 even if the tab 32 does not make contact with the removable panel 31 at one or more ofthe points 80,82, 72 and 74, as long as sufficient camber and stress are incorporated into the tab at 32.
  • a can end closure having a substantially flat, imperforate central wall with a peripheral flange adapted to be interfolded with an edge flange of a can body to form a double seam whose top portion is disposed above the central wall, a peripheral score defining a removable panel in the central wall, and an opening tab having a nose portion at the outer end adjacent the peripheral score and a handle portion at the inner end thereof, said tab being secured to the removable panel by a securement adjacent the nose portion, the improvement which comprises a camber and stress in the tab extending from at least about the securement to about the handle portion and a corresponding raised area of stress in the panel disposed beneath the cam bered area of the tab, whereby when the end closure is placed on a can and the closed can is subjected to internal pressure, the tab handle portion will not rise above the top portion of the double seam.
  • tab handle portion has two opposing sides which make point contact with the panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
US383186A 1973-07-27 1973-07-27 Full-open end with cambered tab Expired - Lifetime US3863801A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US383186A US3863801A (en) 1973-07-27 1973-07-27 Full-open end with cambered tab
GB2072074A GB1458425A (en) 1973-07-27 1974-05-10 Can end closures
AU68811/74A AU477563B2 (en) 1973-07-27 1974-05-10 Full open end with cambered tab
CA203,460A CA1008002A (en) 1973-07-27 1974-06-26 Full-open end with cambered tab
JP1974077422U JPS5353659Y2 (it) 1973-07-27 1974-07-01
AT612574A AT340306B (de) 1973-07-27 1974-07-25 Endverschluss fur einen behalter, insbesondere fur eine konservenbuchse
IT52297/74A IT1018732B (it) 1973-07-27 1974-07-26 Perfezionamento nei contenitori ad apertura totale provvisti di lin guetta a strappo incurvata

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US383186A US3863801A (en) 1973-07-27 1973-07-27 Full-open end with cambered tab

Publications (1)

Publication Number Publication Date
US3863801A true US3863801A (en) 1975-02-04

Family

ID=23512077

Family Applications (1)

Application Number Title Priority Date Filing Date
US383186A Expired - Lifetime US3863801A (en) 1973-07-27 1973-07-27 Full-open end with cambered tab

Country Status (6)

Country Link
US (1) US3863801A (it)
JP (1) JPS5353659Y2 (it)
AT (1) AT340306B (it)
CA (1) CA1008002A (it)
GB (1) GB1458425A (it)
IT (1) IT1018732B (it)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986633A (en) * 1976-01-22 1976-10-19 Aluminum Company Of America Tab for easy-opening container wall
US3989161A (en) * 1976-03-03 1976-11-02 American Can Company Container end closure
US4130219A (en) * 1977-11-21 1978-12-19 The Continental Group, Inc. Bead supported tab for non-detachable ends
US5816429A (en) * 1996-12-24 1998-10-06 Kobayashi; Tadao Container opening device
US20050252917A1 (en) * 2004-05-14 2005-11-17 Timothy Turner Can end with tab for improved accessibility
US20080067171A1 (en) * 2006-09-19 2008-03-20 Heinicke Paul R Easy open can end with high pressure venting
US20080314906A1 (en) * 2007-06-22 2008-12-25 Butcher Gregory H Can end and method of making same
US20100116374A1 (en) * 2008-11-11 2010-05-13 Crown Packaging Technology, Inc. Method of assembling an easy open container
US20110186575A1 (en) * 2008-01-18 2011-08-04 Crown Packaging Technology, Inc. Can end
US20110308202A1 (en) * 2008-09-04 2011-12-22 Crown Packaging Technology, Inc. Can end
US8733576B2 (en) 2002-06-11 2014-05-27 Crown Packaging Technology, Inc. Easily openable can lid having a movable portion for pull tab access
US20190112096A1 (en) * 2017-10-12 2019-04-18 Ardagh Metal Beverage USA Inc. Tabs and related methods
US12246371B1 (en) 2023-09-11 2025-03-11 Intellectual Capital Management Pull tab with raised lift end and associated method
USD1095230S1 (en) 2024-11-18 2025-09-30 Intellectual Capital Management Pull tab for a container

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2075199B1 (en) * 2007-12-24 2016-02-24 Ardagh MP Group Netherlands B.V. Can and a method for making such a can

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591038A (en) * 1969-09-12 1971-07-06 American Can Co Easy-open end with abuse-resistant opening tab
US3799390A (en) * 1971-12-21 1974-03-26 Reynolds Metals Co Easy open end closure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591038A (en) * 1969-09-12 1971-07-06 American Can Co Easy-open end with abuse-resistant opening tab
US3799390A (en) * 1971-12-21 1974-03-26 Reynolds Metals Co Easy open end closure

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986633A (en) * 1976-01-22 1976-10-19 Aluminum Company Of America Tab for easy-opening container wall
US3989161A (en) * 1976-03-03 1976-11-02 American Can Company Container end closure
US4130219A (en) * 1977-11-21 1978-12-19 The Continental Group, Inc. Bead supported tab for non-detachable ends
US5816429A (en) * 1996-12-24 1998-10-06 Kobayashi; Tadao Container opening device
US8733576B2 (en) 2002-06-11 2014-05-27 Crown Packaging Technology, Inc. Easily openable can lid having a movable portion for pull tab access
US7909196B2 (en) 2004-05-14 2011-03-22 Rexam Beverage Can Company Can end with tab for improved accessibility
WO2005113352A1 (en) * 2004-05-14 2005-12-01 Rexam Beverage Can Company Can end with tab for improved accessibility
US20050252917A1 (en) * 2004-05-14 2005-11-17 Timothy Turner Can end with tab for improved accessibility
US20080067171A1 (en) * 2006-09-19 2008-03-20 Heinicke Paul R Easy open can end with high pressure venting
US7922025B2 (en) * 2006-09-19 2011-04-12 Crown Packaging Company, L.P. Easy open can end with high pressure venting
US20080314906A1 (en) * 2007-06-22 2008-12-25 Butcher Gregory H Can end and method of making same
US8109405B2 (en) * 2007-06-22 2012-02-07 Stolle Machinery Company, Llc Can end and rivet base scoreline therefor
US9199763B2 (en) 2008-01-18 2015-12-01 Crown Packaging Technology, Inc. Can end
US20110186575A1 (en) * 2008-01-18 2011-08-04 Crown Packaging Technology, Inc. Can end
US20110308202A1 (en) * 2008-09-04 2011-12-22 Crown Packaging Technology, Inc. Can end
US9016034B2 (en) * 2008-09-04 2015-04-28 Crown Packaging Technology, Inc. Easily openable can end, container, and methods of forming
AU2009289732B2 (en) * 2008-09-04 2015-09-03 Crown Packaging Technology, Inc. Can end
US20100116374A1 (en) * 2008-11-11 2010-05-13 Crown Packaging Technology, Inc. Method of assembling an easy open container
US20190112096A1 (en) * 2017-10-12 2019-04-18 Ardagh Metal Beverage USA Inc. Tabs and related methods
US10577148B2 (en) * 2017-10-12 2020-03-03 Ardagh Metal Beverage USA Inc. Tabs and related methods
USD893298S1 (en) 2017-10-12 2020-08-18 Ardagh Metal Beverage USA Inc. Tab
USD894000S1 (en) 2017-10-12 2020-08-25 Ardagh Metal Beverage USA Inc. Tab
US12246371B1 (en) 2023-09-11 2025-03-11 Intellectual Capital Management Pull tab with raised lift end and associated method
USD1095230S1 (en) 2024-11-18 2025-09-30 Intellectual Capital Management Pull tab for a container

Also Published As

Publication number Publication date
AT340306B (de) 1977-12-12
CA1008002A (en) 1977-04-05
JPS5057871U (it) 1975-05-30
ATA612574A (de) 1977-03-15
GB1458425A (en) 1976-12-15
JPS5353659Y2 (it) 1978-12-21
AU6881174A (en) 1975-11-13
IT1018732B (it) 1977-10-20

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Legal Events

Date Code Title Description
AS Assignment

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

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 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