US3544025A - Full open end - Google Patents

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Publication number
US3544025A
US3544025A US728518A US3544025DA US3544025A US 3544025 A US3544025 A US 3544025A US 728518 A US728518 A US 728518A US 3544025D A US3544025D A US 3544025DA US 3544025 A US3544025 A US 3544025A
Authority
US
United States
Prior art keywords
score
tab
section
peripheral
ancillary
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
US728518A
Other languages
English (en)
Inventor
Leonard Thomas La Croce
Raymond Luscombe Batchelar
John Wilson Rouse
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 US3544025A publication Critical patent/US3544025A/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
    • B65D17/28—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

  • the outer end of the pull tab is tilted upwardly to insure that the ancillary score ruptures before the peripheral score does.
  • Full-open cans are suitable for packaging solid products which are customarily removed by inserting the hand or a spoon or measuring cup into the container, and for products which require a large opening if they are to be removed without mutilation.
  • Candy, shelled nuts, meats, ground coffee, solid or chunky products such as processed and frozen vegetables, fruits, frozen fruit juices, sausages and other meat products are examples of products which are suitable for packaging in full-open cans.
  • the peripheral score is the outer score of a peripheral tear strip which is paralleled on its inner side over most of its length by another score.
  • the tear strip usually has a more or less radially extending portion leading towards the center of the panel so that the tear strip is essentially spiral in configuration.
  • a pull tab is secured to the radially extending portion, and when pulled upwardly, has the effect of tearing the scores on either side of that section until the tears spill out to the peripheral score and the score parallel to it.
  • the peripheral score is tom, the metal within it is detached from the can.
  • This type of opening feature is somewhat objectionable, in that the circular tear strip is rather long in comparison to the diameter of the end so that the consumer must exert a long continuous pull on the opening tab if the peripheral score is to be completely ruptured to permit removal of the end panel.
  • the tear strip is omitted, and the 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 can of the removable section which is defined by the peripheral score.
  • This type of full-open can is advantageous because the consumer does not have to exert a pull for as long a period as is necessary to open a full-open can having a circular or spiral tear strip.
  • a container with an end closure having a main circular score adjacent to the countersink wall and an ancillary chordal score formed within the main score, and defining a pivotable section having one or more flex inducing scores extending between the ancillary and main scores to prevent inadvertent tearing of said section from the remainder of the can end during the opening operation.
  • the outer end of the pull tab is tilted upwardly so that the ancillary score tears before initial rupture of the peripheral score occurs, thus minimizing the opening pressure required and pre-venting the interior of the can to the atmosphere.
  • FIG. 1 is a plan view of an end closure made in accordance with the present invention.
  • FIG. 2 is an enlarged fragmentary section, taken substantially along the line 2-2 of FIG. 1;
  • FIG. 3 is an enlarged section, taken along the line 3-3 in FIG. 1 and showing the end closure after it has been seamed onto a can body;
  • FIG. 4 is an enlarged fragmentary section, similar to FIG. 3 and showing the position of parts after the pull tab has been rocked upwardly a sufficient distance to initiate rupture of the ancillary score;
  • FIG. 5 is a fragmentary plan view of the closure, taken on the scale of FIG. 1 and showing the position of the parts after the pull tab has been rocked a sufficient distance to initiate rupture of the peripheral score;
  • FIG. 6 is an enlarged fragmentary section taken substantially along the line 6-6 of FIG. 5;
  • FIG. 7 is a fragmentary sectional view, on an enlarged scale, taken substantially along the line 7-7 of FIG. 5'.
  • FIG. 8 is a fragmentary sectional view on an enlarged scale. taken substantially along the line 8-8 of FIG. 5;
  • FIG. 9 is an enlarged view, similar to FIG. 3, and showing the position of parts during the time the pull tab is being pulled upwardly and backwardly in the general direction of the arrow to effect complete removal of the removable central panel of the end.
  • FIGS. 1 and 2 of the drawings illustrate a can end indicated generally as 10, and made in accordance with the instant invention.
  • the end closure 10 is formed with a substantially flat imperforate central wall 12 and has an edge curled peripheral flange 14 which is adapted to be interfolded with an end flange 16 of a can body 18 to form a double seam 20 as shown in FIG. 3.
  • the bottom end of the can body 18 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 central wall 12 and the peripheral flange 14 are preferably joined by a countersink wall 22 which has an upper portion 24 and an inwardly offset lower portion 26 which are joined by a shoulder portion 28.
  • a countersink wall 22 which has an upper portion 24 and an inwardly offset lower portion 26 which are joined by a shoulder portion 28.
  • a score 30 which is indented into the metal and defines a panel 31 of the can end which is removable, this panel 31 including most of the wall 12.
  • a stiff, nonbendable opening tab 32 Positioned close to the score is a stiff, nonbendable opening tab 32 having a curled peripheral edge 33, and at its inner end, a handle portion 34 with an uplifted portion 35 to enable the pull tab to be easily grasped by the user.
  • the opening tab 32 has at its outer end an uplifted nose portion 36, the purpose of which will appear presently, 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 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. 2) has an annular side wall 42 which merges at its top into a transverse wall 44 having about its periphery an annular bead 46 which extends over the flat-web portion 38 of the opening tab 34 to secure the opening tab 34 to the removable panel 31.
  • ancillary score 48 In the outer edge portion of the removable panel 31 is a generally chordally extending ancillary score 48 having a curved central portion 50 which passes immediately behind the rivet 40.
  • the score 48 also includes straight segments 52 and 54 which extend outwardlyfrom the curved portion 50 and diametrically of the rivet 40 and merge into inwardly curled terminal portions 56 and 58, respectively.
  • the metal between the ancillary score 48 and the peripheral score 30 forms a pivotable section 60 which is provided on either side of the rivet 40 with a pair of spaced flex-inducing scores 62, which function to induce flexing in the section 60, as will hereinafter be explained.
  • Initial rupture of the ancillary score 48 occurs in its curved portion 50 during the first stage of the upward rock of the tab 32 as shown in FIG. 4.
  • the upturned nose portion 36 of the tab 32 allows this initial rupture of the ancillary score to occur prior to the application of rupturing force to the peripheral score 30 by the tab 32, as clearly seen in FIG. 4. Since it requires a comparatively large force to initiate the rupture of a score, it is desirable that ruptures in the ancillary score 48 and the peripheral score 30 not be initiated simultaneously in order to limit the force which must be exerted on the pull tab 32 by the user.
  • Another advantage of such a construction is that initial rupture of the ancillary score 48 causes a controlled venting of the container through the small opening 61 (See FIG. 4) which is created by the rupture of the curved portion 50, thereby equalizing the internal pressure of the can and the atmospheric pressure on the top of the central panel 12.
  • Another advantage of the present invention is that the flatweb portion 38 of the tab 32 covers the curved portion 50 of the score 48 so that when the present end is used in a can wherein a granular or powdery product is under pressure, the product will not be sprayed onto the user by the outrush of gas when the curved portion 50 is ruptured in the initial state of the opening operation.
  • the outer and inner portions of section 60 generally pivot around and bend along the scores 62, which remain substantially in the original plane of the removable panel 31.
  • that outer portion of the pivotable section 60 which is located outwardly of the scores 62 pivots downwardly into the can, while that inner portion 64 between the scores 62 and the torn ancillary score 48 pivots upwardly.
  • the twisting of the metal necessary to effect this latter pivoting action takes place primarily in the narrow portions 64 disposed between the flex-inducing scores 62 and the ancillary score 48.
  • FIG. 7 shows the contour at the section line 7-7 which passes between the opening tab 32 and the end of the rupture in the straight segment 52 of the ancillary score 48.
  • the narrow inner portion 64 is pivoted upwardly so that the rear free edge thereof created by the rupture of the straight segment 52 is raised above the plane of the removable section 31.
  • FIG. 8 shows the contour of the pivotable section 60 at such a location where substantially all of the bending occurs at the flex-inducing score 62, so that the metal on either side of that score is essentially planar.
  • the flex-inducing scores 62 provide further insurance against a disabling breaking of one end of the pivotable section 60, since if, in spite of their above-described flex inducing action, improper manipulation of the opening tab 32 does cause one or both ends of the tear in the ancillary score 48 to break out of the score 48, the tear will progress only until it meets one of the scores 62, whereupon the tear will be stopped before it reaches the free edge 66.
  • the final step in the opening operation is an upward and backward pull on the opening tab (in the general direction of the arrow in FIG. 9), to cause the tear in the peripheral score '30 to continue to extend in both directions around that score for. 360 to completely detach the removable section 31 from the can end 10, thus completing the opening of the can.
  • a component for a container comprising:
  • said opening t'ab having an upturned nose portion at one end adjacent to said peripheral score and a handle portion at the other end thereof;
  • a substantially linear flex-inducing score positioned between said ancillary score and said peripheral score and defining therewith, respectively, inner and outer portions in said pivotable section;
  • container component of claim 1 including: nose portion downwardly to initiate rupture of said peripheral score to form a free edge on said outer portion of the pivotable section;
  • said flex-inducing score with said tab nose portion causing a bend to occur in said outer portion, and, wherein said flex-inducing score prevents tears in said ancillary score from progressing forwardly across said pivoted section to said free edge.
  • the container component of claim 1 including:
  • said ancillary score comprises a curved portion encircling said rivet closely for a portion of its circumference on the side thereof farthest from said peripheral score and two segments extending outwardly from the ends of said curved portion.
  • said ancillary score further comprises two curled portions, one on each end of said straight segments, said curled portions each extending outwardly from said straight portions and away from said peripheral score.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
US728518A 1968-05-13 1968-05-13 Full open end Expired - Lifetime US3544025A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72851868A 1968-05-13 1968-05-13

Publications (1)

Publication Number Publication Date
US3544025A true US3544025A (en) 1970-12-01

Family

ID=24927175

Family Applications (1)

Application Number Title Priority Date Filing Date
US728518A Expired - Lifetime US3544025A (en) 1968-05-13 1968-05-13 Full open end

Country Status (6)

Country Link
US (1) US3544025A (de)
BR (1) BR6908727D0 (de)
CH (1) CH479451A (de)
DK (1) DK124870B (de)
FR (1) FR2008340A1 (de)
GB (1) GB1268252A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685683A (en) * 1970-08-28 1972-08-22 Carnaud & Forges End for easy opening can
US3720349A (en) * 1970-08-17 1973-03-13 Fraze Ermal C Easy opening container wall
US3762596A (en) * 1970-07-24 1973-10-02 Dorn Co V Easy opening can end
US3799390A (en) * 1971-12-21 1974-03-26 Reynolds Metals Co Easy open end closure
US5038956A (en) * 1988-01-22 1991-08-13 Weirton Steel Corporation Abuse resistant, safety-edge, controlled-opening convenience-feature end closures
US5052573A (en) * 1990-02-21 1991-10-01 Automated Container Corporation Easy open end for containers employing enlarged moustache score
US5232114A (en) * 1992-08-10 1993-08-03 Crown Cork & Seal Company, Inc. Full-open convenience closure
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
US20080069666A1 (en) * 2006-09-19 2008-03-20 Heinicke Paul R Method of making an easy open can end with high pressure venting
US20080067171A1 (en) * 2006-09-19 2008-03-20 Heinicke Paul R Easy open can end with high pressure venting
US20080067174A1 (en) * 2006-09-19 2008-03-20 Crown Packaging Technology Inc. Easy open can end with high pressure venting
WO2010122111A1 (en) * 2009-04-23 2010-10-28 Crown Packaging Technology, Inc. Can end
US20170190462A9 (en) * 2009-09-04 2017-07-06 Crown Packaging Technology, Inc. Full aperture beverage end

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4386713A (en) * 1982-02-24 1983-06-07 Van Dorn Company Full opening steel can end construction

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762596A (en) * 1970-07-24 1973-10-02 Dorn Co V Easy opening can end
US3720349A (en) * 1970-08-17 1973-03-13 Fraze Ermal C Easy opening container wall
US3685683A (en) * 1970-08-28 1972-08-22 Carnaud & Forges End for easy opening can
US3799390A (en) * 1971-12-21 1974-03-26 Reynolds Metals Co Easy open end closure
US5038956A (en) * 1988-01-22 1991-08-13 Weirton Steel Corporation Abuse resistant, safety-edge, controlled-opening convenience-feature end closures
US5052573A (en) * 1990-02-21 1991-10-01 Automated Container Corporation Easy open end for containers employing enlarged moustache score
US5232114A (en) * 1992-08-10 1993-08-03 Crown Cork & Seal Company, Inc. Full-open convenience closure
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
US20080067174A1 (en) * 2006-09-19 2008-03-20 Crown Packaging Technology Inc. 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
US20080069666A1 (en) * 2006-09-19 2008-03-20 Heinicke Paul R Method of making an easy open can end with high pressure venting
US20100028104A1 (en) * 2006-09-19 2010-02-04 Crown Packaging Technology, Inc. Method of making an easy open can end with high pressure venting
US7673490B2 (en) * 2006-09-19 2010-03-09 Crown Packaging Technology, Inc. Method of making an easy open can end with high pressure venting
US7721906B2 (en) * 2006-09-19 2010-05-25 Crown Packaging Technology, Inc. Easy open can end with high pressure venting
US7784323B2 (en) 2006-09-19 2010-08-31 Crown Packaging Technology, Inc. Method of making an easy open can end with high pressure venting
US20080067171A1 (en) * 2006-09-19 2008-03-20 Heinicke Paul R Easy open can end with high pressure venting
WO2010122111A1 (en) * 2009-04-23 2010-10-28 Crown Packaging Technology, Inc. Can end
EP2253552A1 (de) * 2009-04-23 2010-11-24 Crown Packaging Technology, Inc Dosenende
CN102428010A (zh) * 2009-04-23 2012-04-25 皇冠包装技术公司 罐盖
CN102428010B (zh) * 2009-04-23 2014-02-26 皇冠包装技术公司 罐盖
US8998015B2 (en) 2009-04-23 2015-04-07 Crown Packaging Technology, Inc. Can end
US20170190462A9 (en) * 2009-09-04 2017-07-06 Crown Packaging Technology, Inc. Full aperture beverage end
US10053260B2 (en) * 2009-09-04 2018-08-21 Crown Packaging Technology, Inc. Full aperture beverage end

Also Published As

Publication number Publication date
CH479451A (de) 1969-10-15
BR6908727D0 (pt) 1973-01-30
FR2008340A1 (de) 1970-01-23
DK124870B (da) 1972-12-04
GB1268252A (en) 1972-03-29

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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