US2978140A - Container opening devices - Google Patents

Container opening devices Download PDF

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Publication number
US2978140A
US2978140A US28039A US2803960A US2978140A US 2978140 A US2978140 A US 2978140A US 28039 A US28039 A US 28039A US 2803960 A US2803960 A US 2803960A US 2978140 A US2978140 A US 2978140A
Authority
US
United States
Prior art keywords
key
tab
cover
fulcrum
tear strip
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
US28039A
Other languages
English (en)
Inventor
John E Walsh
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.)
United Shoe Machinery Corp
Original Assignee
United Shoe Machinery Corp
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
Priority to IT649860D priority Critical patent/IT649860A/it
Application filed by United Shoe Machinery Corp filed Critical United Shoe Machinery Corp
Priority to US28039A priority patent/US2978140A/en
Application granted granted Critical
Publication of US2978140A publication Critical patent/US2978140A/en
Priority to DEU8004A priority patent/DE1184666B/de
Priority to ES0267887A priority patent/ES267887A1/es
Priority to FR861315A priority patent/FR1289108A/fr
Priority to GB16765/61A priority patent/GB987094A/en
Priority to BE644444A priority patent/BE644444A/xx
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
    • 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
    • B65D17/34—Arrangement or construction of pull or lift tabs
    • 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

  • This invention relates to opening devices for covers of metallic containers which utilize tear strips and opening keys.
  • One such opening device has a tear strip lying in the plane surface of the cover and extending around the cover just inwardly of its perimeter with the key permanently secured as a second class lever to one end of the tear strip. The end to which the key is attached is in the form of an inwardly projecting tab.
  • the inner end of the key is lifted pivoting it about the other end as a fulcrum which pulls up on the tab and breaks the end of the tab from the container. Thereafter, the remainder of the tab and the tear strip is removed by either a continuous pull on the key or by turning the key bodily about its own axis. vIn the latter operation the key is first pivoted upwardly about its fulcrum until the lifting end turns over and projects beyond the outer margin of the container, whereupon the key is wound about its own axis with the tear strip forming a coil about the fulcrum end.
  • the tear is first pivoted upwardly about its fulcrum until the lifting end turns over and projects beyond the outer margin of the container, whereupon the key is wound about its own axis with the tear strip forming a coil about the fulcrum end.
  • strip is formed with a continuous sharp curve of small radius making the accurate formation of the coil about the key difiicult. This causes the coil to have a tendency to slip off the key which is obviously undesirable in that it impedes the opening process. Also in instances where the tear strip has straight runs plus sharp bends, as for example, at the corners of flat rectangular sardine cans, the strip is extremely difficult to coil and likewise as a tendency to slip. off the key.
  • One object of this invention is to provide a cover for a metallic container having a'tear strip and opening key permanently secured thereto, shaped and positioned rela tive to each other and to the cover so thatwhenthe strip is broken open and the key .wound there' is an accurate formation of coil about its end without slipping from the key.
  • Another object of this invention is to provide acover having an opening key permanently secured to a tear strip which has a small radius of curvature relative to the size of the key with means on the key for controlling the formation of a coil of the tear strip material on the as the key is turned bodily about its axis.
  • a cover for a metallic container having a prescor ed tear strip formed in its surface and extending around the cover just inside'its pe- United States Patent key i atented Apr. 4, 1961 ripheral edge.
  • the tear strip has an inwardly projecting tab or starting portion provided with a permanently secured opening key in the form of a second class lever to pry the tab from the cover.
  • the key has a lifting portion at one end adapted to be gripped by the fingers and a fulcrum on the other end separated by a narrow intermediate portion. The key is secured to the tear strip by a spot weld intermediate of its ends.
  • the fulcrum of the key may be either a bar extending transverselyof the axis of the key or a straight edge including projecting ears, the fulcrum being of a greater width than both the tab and the intermediate portion of the key so that when the key is lifted, pivoted about the fulcrum and extended beyond the edge of the can, the tab overlies the upturned underside of the key and the ends of the fulcrum or the ears extend outwardly from beneath the tab.
  • the fulcrum in whatever form it may be constructed, must be located inwardly of the inner edge of the peripheral portion of the tear strip an amount equal to its own breadth (or half its circumference if it is a bar or rod) such that when the key is pivoted 180 about the fulcrum, the ends of the fulcrum or ears are still within the inner edge of the peripheral portion of the tear strip.
  • These projecting portions of the fulcrum bar or ears then serve as guides for the formation of the coil of the tear strip as it is wound about the key, thereby assuring that the coil does not slip off the key particularly where it proceeds around sharp bends or curves having small radii.
  • the fulcrum end of the key is wider than the projecting tab of the tear strip insofar as preventing the tear strip from being depressed into the container, it is immaterial whether it is greater than, equal to or less than the intermediate and lifting portions of the key.
  • the single requirement for preventing depression is that the fulcrum be wider than or bridge the tab of the tear strip.
  • Fig. 1 is a plan view of a circular cover for a metallic container having a tear strip and opening key embodying I the invention
  • Fig. 2 is a plan view of the container opening device shown in Fig. l with the opening key lifted and turned to the outside of the cover;
  • Fig. 3 is a plan view similar to Figs. 1 and 2 with the 4 key having been rotated and a portion of the strip severed from the cover and wound on thekey;
  • the invention is illustrated in Figs. 1 through 3 in g a circular cover 2 adapted to be secured by double-seaming or any other convenient means to the body of a container.
  • the cover 2 is provided with a prescored tear strip 4 which is located adjacent the inner edge of the crest 6 which, after double-seaming, forms the uppermost portion of the cover.
  • the tear strip 4 extends around the perimeter of the cover being formed by two concentric peripheral score lines 8 and 10. Contiguous with the peripheral portion of the tear strip is an inwardly projecting tab 12 which is terminated by an arcuate portion 14 of the inner score line 10.
  • An open- 4 ing key 16 overlies the arcuate portion of the tab 12 crum portion "of the key s of greater width than the tab 12 so that the fulcrum member (including the ears 2 6) extends'outwardly on both sides of'the projecting 'A spot weld 28 joins the intermediate portion of the key 20 to the tab .12 to secure the key permanently to the tab and thus making the key a second class lever.
  • Fig.4 illustrates an alternative form of key wherein the fulcrum member isa bar or rod 30 of any desired crosssection secured to the intermediateportion32 of the key.
  • the lifting portion of the key 33 may be of any configuration, fiat'or contoured without departing from the'scope of this invention.
  • the ears 26 or the ends of the'fulcrum bar project outwardly from beneath the tab but are located wholly within means-er :arcu'ate score line 10.
  • the key is then in'position 'to be turned bodily about its own “axis to assume, first, the "solid line and then the dotted line position shown in Fig. 3 while the tear strip 4 is coiled about the intermediate portion of the key.
  • the coil is maintained on the key'and is pre'vented fromf sliding nw o he @an- W nd n i c fi me iu e t t i -he' ee ser sd o until i s e itt t- "(ms of the tear strip'havebeen gevered' su'clfthatlthe cover can readily be removed? Should, however, the .edge of the fulcrum be' positioned adjacent the'score line 10, after one turn the ears'would be covered by thethe coil.
  • Fig. 5 illustrates the tear strip andkey secu edtoa cover .on a rectangular or sardineit'ypefcani' "Itf'will e n h 'th y qu'n .arq inl th f h p som r the an ther w be]ss sider bl fi n q for the tear strip coilj'to slide olf the keyand in snch applications the benefits" ac'co rded by the projecting bars or projectingends offthe ruler'm'n memberfvlvill as 36st ig y ppm partially coiled strip andbe of no value 'in controlling "While thiinve'ntion has been described as embodied in covers for; metallic" containers, it "will be unde'rstoodthat it is'e'ciually applicableftbjcovers for containers e walls of which may"b formed parfiauyer ehtlrelyfof ma
  • a cover for a metallic container having in its surface score lines defining an inwardly extending tab, a rigid class two lever adapted to break open instantaneously the inner end of the tab, said lever being located on the cover and having at one end a fulcrum wider than the inner end of the tab to bear on the cover surface on both sides of the score lines defining the tab, an interslsqi p Rad a 9f t lever being pe a nt y se u ed only a h fa v.t an area dia snt't rum Sa lever having a lifting portion at the end opposite "the fulcrum whereby when the lifting portion is raised the fulcrum endbears downwardly on the cover thereby using the full mechanical advantage of the lever to pry up the inner end of the tab and initiate the tearing out of said tab.
  • a cover for a metallic container having in its surface 'scoije'dines defining'a tear strip with a continuing inwa'rldlyexte'nding'tab portion, a' rigid class'two lever adapted tofbreak open instantaneously the inner endio'f theft'ab, 'said lever being'located on the cover and having at"orie'end"a' fulcrum wider than the tab to bear on the eoversnrf ce on both sides of the score lines defining the"tab,'fan intermediate portion ofthe lever being permanently"s'ecur"ed onl y'to' th'e tab at an area adjacent the fulcrum;”said lever having a'lifting' portion at the end opposite the fulcrum whereby when the lifting portionis raised'the fulcrum end bears downwardly on the cover thereby'using the'full' mechanical advantage of the lever to pry up the inner end ofthe tab and initiate the'tearing r .1. It. r .
  • a cover for a metallic container having in its surface score lines" defining a peripheral tear 'strip' with a continuingin'wardly extending tab portion, av rigid class two:,lever adapted to. break open instantaneously the linne're'n'd ofthetab, saidlever having a lifting portion at one end, an intermediate portion permanently secured onlytothef'tab and atthe end opposite the' lifting portion a.f ulcrum member wider than both the tab and the intermediate portion of the.lever, said fulcrum member being located outhe coverto bear on the coversurface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Basic Packing Technique (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
US28039A 1960-05-10 1960-05-10 Container opening devices Expired - Lifetime US2978140A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
IT649860D IT649860A (no) 1960-05-10
US28039A US2978140A (en) 1960-05-10 1960-05-10 Container opening devices
DEU8004A DE1184666B (de) 1960-05-10 1961-05-08 Aufreissverschluss fuer insbesondere aus Blech bestehende Dosen
ES0267887A ES267887A1 (es) 1960-05-10 1961-05-09 Perfeccionamientos en los medios para abrir envases
FR861315A FR1289108A (fr) 1960-05-10 1961-05-09 Ouvre-boîte
GB16765/61A GB987094A (en) 1960-05-10 1961-05-09 Improvements in or relating to containers
BE644444A BE644444A (no) 1960-05-10 1964-02-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28039A US2978140A (en) 1960-05-10 1960-05-10 Container opening devices

Publications (1)

Publication Number Publication Date
US2978140A true US2978140A (en) 1961-04-04

Family

ID=21841220

Family Applications (1)

Application Number Title Priority Date Filing Date
US28039A Expired - Lifetime US2978140A (en) 1960-05-10 1960-05-10 Container opening devices

Country Status (6)

Country Link
US (1) US2978140A (no)
BE (1) BE644444A (no)
ES (1) ES267887A1 (no)
FR (1) FR1289108A (no)
GB (1) GB987094A (no)
IT (1) IT649860A (no)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151766A (en) * 1961-02-10 1964-10-06 Continental Can Co Pull tab tear strip combination for metal can end
US3176872A (en) * 1962-02-28 1965-04-06 American Can Co Metal end closure for container body
US3187931A (en) * 1961-02-10 1965-06-08 Continental Can Co Plastic pull tab adhesively secured to metal strip
US3187930A (en) * 1961-02-10 1965-06-08 Continental Can Co Plastic pull tab to metal tear strip assembly with a curled connection
US3195766A (en) * 1961-02-10 1965-07-20 Continental Can Co Plastic pull tab to metal tear strip connection with plug gripping feature
US3195765A (en) * 1961-02-10 1965-07-20 Continental Can Co Tear strip connected to pull tab by means of an integral rivet
US3204812A (en) * 1961-02-10 1965-09-07 Continental Can Co Plastic pull tab to metal tear strip assembly
US3208628A (en) * 1961-02-10 1965-09-28 Continental Can Co Pull tab secured to tear strip by concentric rivet formation
US3221924A (en) * 1964-12-11 1965-12-07 Harvey Aluminum Inc Can opener
US3232474A (en) * 1963-09-24 1966-02-01 Aluminum Co Of America Opening means for sealed containers
US3251503A (en) * 1964-01-10 1966-05-17 Continental Can Co Easy opening and lifting can-end with dead-end inside score line
US3254790A (en) * 1963-07-24 1966-06-07 Aluminum Co Of America Easy open tear strip can ends
US3272166A (en) * 1964-05-07 1966-09-13 Continental Can Co Method of assembling a pull element and a can end
US3278068A (en) * 1964-06-01 1966-10-11 Forest Plasties Inc Snap action opening means for a container
US3598272A (en) * 1968-07-24 1971-08-10 Jose A Bustamante Self-opening bottle caps
US3632461A (en) * 1969-05-16 1972-01-04 Aluminum Co Of America Method of making a laminated container wall structure
US3762597A (en) * 1972-02-18 1973-10-02 Stolle Corp Can with easy-open captive tear strip
US3830399A (en) * 1973-07-11 1974-08-20 F Hill Container closure
US20080290091A1 (en) * 2007-05-24 2008-11-27 Shiffer David A Container lid arrangement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2003394A6 (es) * 1986-10-20 1988-11-01 Carnaud Envases Sa Util para abrir un envase con tapa de facil apertura
ES1009482Y (es) * 1989-01-25 1990-02-16 Sanz Salvador Fernando Dispositivo de apertura para latas de conservas.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2112231A (en) * 1936-05-23 1938-03-29 Edwin F M Speidel Container
US2946478A (en) * 1958-09-22 1960-07-26 Kelsey Hayes Co Opening means for sealed containers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2112231A (en) * 1936-05-23 1938-03-29 Edwin F M Speidel Container
US2946478A (en) * 1958-09-22 1960-07-26 Kelsey Hayes Co Opening means for sealed containers

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151766A (en) * 1961-02-10 1964-10-06 Continental Can Co Pull tab tear strip combination for metal can end
US3187931A (en) * 1961-02-10 1965-06-08 Continental Can Co Plastic pull tab adhesively secured to metal strip
US3187930A (en) * 1961-02-10 1965-06-08 Continental Can Co Plastic pull tab to metal tear strip assembly with a curled connection
US3195766A (en) * 1961-02-10 1965-07-20 Continental Can Co Plastic pull tab to metal tear strip connection with plug gripping feature
US3195765A (en) * 1961-02-10 1965-07-20 Continental Can Co Tear strip connected to pull tab by means of an integral rivet
US3204812A (en) * 1961-02-10 1965-09-07 Continental Can Co Plastic pull tab to metal tear strip assembly
US3208628A (en) * 1961-02-10 1965-09-28 Continental Can Co Pull tab secured to tear strip by concentric rivet formation
US3176872A (en) * 1962-02-28 1965-04-06 American Can Co Metal end closure for container body
US3254790A (en) * 1963-07-24 1966-06-07 Aluminum Co Of America Easy open tear strip can ends
US3232474A (en) * 1963-09-24 1966-02-01 Aluminum Co Of America Opening means for sealed containers
US3251503A (en) * 1964-01-10 1966-05-17 Continental Can Co Easy opening and lifting can-end with dead-end inside score line
US3272166A (en) * 1964-05-07 1966-09-13 Continental Can Co Method of assembling a pull element and a can end
US3278068A (en) * 1964-06-01 1966-10-11 Forest Plasties Inc Snap action opening means for a container
US3221924A (en) * 1964-12-11 1965-12-07 Harvey Aluminum Inc Can opener
US3598272A (en) * 1968-07-24 1971-08-10 Jose A Bustamante Self-opening bottle caps
US3632461A (en) * 1969-05-16 1972-01-04 Aluminum Co Of America Method of making a laminated container wall structure
US3762597A (en) * 1972-02-18 1973-10-02 Stolle Corp Can with easy-open captive tear strip
US3830399A (en) * 1973-07-11 1974-08-20 F Hill Container closure
US20080290091A1 (en) * 2007-05-24 2008-11-27 Shiffer David A Container lid arrangement
US7942286B2 (en) * 2007-05-24 2011-05-17 Tech Ii, Inc. Container lid arrangement

Also Published As

Publication number Publication date
IT649860A (no)
FR1289108A (fr) 1962-03-30
GB987094A (en) 1965-03-24
ES267887A1 (es) 1961-09-01
BE644444A (no) 1964-06-15

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