US3891116A - Full-open easy-open container - Google Patents

Full-open easy-open container Download PDF

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Publication number
US3891116A
US3891116A US315088A US31508872A US3891116A US 3891116 A US3891116 A US 3891116A US 315088 A US315088 A US 315088A US 31508872 A US31508872 A US 31508872A US 3891116 A US3891116 A US 3891116A
Authority
US
United States
Prior art keywords
score
central panel
bead
open
full
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
US315088A
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English (en)
Inventor
Alvin Mansfield Schane
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
Priority to US315088A priority Critical patent/US3891116A/en
Priority to GB5635473A priority patent/GB1410698A/en
Priority to FR7344578A priority patent/FR2327151A1/fr
Application granted granted Critical
Publication of US3891116A publication Critical patent/US3891116A/en
Assigned to AMERICAN CAN PACKAGING INC. reassignment AMERICAN CAN PACKAGING INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AMERICAN CAN COMPANY, A NJ CORP.
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)
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

  • This invention relates to metal easy-opening containers, and more particularly, to metal easy-opening containers whose central panels have a score line-defined full-open removable section.
  • the can making industry presently provides container body side walls with a safety feature in the form of a radially inwardly-protruding annular bead underlyingly adjacent the central panel to protect the edge of the rim of the central panel that remains with the container body once the can is opened.
  • a safety feature in the form of a radially inwardly-protruding annular bead underlyingly adjacent the central panel to protect the edge of the rim of the central panel that remains with the container body once the can is opened.
  • the industry has heretofore been unable to provide sufficient protection of the edge of the full-open removed central panel section.
  • the primary object of this invention is to provide an improved full-open easy-opening container with a safety feature which protects the ruptured score edge of the removable full-open central panel section.
  • the primary feature of this invention therefore is an improved full-open easy-open container wherein the improved safety feature is a plastisol bead on the undersurface of the score-defined full-open central panel section, runningadjacent and along the full-open score to protect the edge of the full-open removable section once the score is ruptured.
  • the improvement comprises providing a plastisol bead upon the undersurface of the rim of the full-open central panel section adjacent and along the score to protect its edge once the score is ruptured.
  • the score has a land portion preferably about 0.001 to 0.003 inch in length and the outer radial edge of the plastisol bead covers the undersurface of the land portion of the score.
  • the thickest portion of the plastisol bead is radially inward of the score and is at least the thickness of the central panel.
  • FIG. 1 is a top plan view of the end closure of a fullopen easy-open container of this invention.
  • FIG. 2 is an enlarged fragmentary vertical section taken substantially along line 22 of FIG. 1.
  • FIG. 3 is a fragmentary sectional view similar to FIG. 2 showing a portion of the full open removable central panel section removed from the container body.
  • FIG. 1 shows a cylindrical can C having a conventional top end closure 10 having a full-open central panel 12 defined by a substantially peripheral score line 14, a rim 16 which merges into an upwardly extending annular countersink wall 18 (FIG. 2) having a step 20 and an upper portion 22, and an annular end flange 24 interfolded with the upper end portion of container body C into a double seam 26 (FIG. 2).
  • End closure 10 has an opening tab 28 secured to central panel 12 as by means of a rivet 30. Opening tab 28 is nonbendable and has a front portion 32 at one end adjacent score line 14 and a handle 34 at the other end.
  • the front portion 32 in this embodiment includes a web portion 38 having a U-shaped slit cut 40 therethrough which defines a flap 42 wherein is located the hole in which rivet 30 is secured.
  • the major portion of front end portion 32 lies outside of U-shaped slit cut 40 so that when handle 34 is lifted upwardly, the front end portion 32 and the rest of tab 28 are free to pivot about rivet 30 to allow nose 36 to rupture score 14, while flap 42 is held flatly against central panel 12 by rivet 30.
  • FIG. 2 is an enlarged fragmentary sectional view taken substantially along line 22 of FIG. 1. More particularly, FIG. 2 shows container body C having a side wall 44 in turn having a conventional radially inwardly protruding annular bead 46 spaced slightly below and underlyingly-adjacent central panel rim 16. Bead 46 extends radially inwardly to a center line which might be drawn through score line 14, so that when a consumers hand is entered into container C after it is opened, the bead will direct an abutingly adjacent portion of the users hand away from the ruptured score edge on central panel rim l6. Bead 48 is downwardly sloped so as not to interfere with the downwardly arcuate path of tab nose 36 during a rupturing of score 14.
  • Bead 46 when sloped could extend beyond the central line from about 0.010 to 0.015 inch.
  • bead 46 is closer to rim 16 so that it abuts the rim and extends short of the center line to not interfere with the rupturing of the score as previously explained.
  • FIG. 2 Also shown in FIG. 2 is the improvement of this invention which comprises a plastisol bead 48 on the undersurface of removable central panel section 12 adjacent and along score 14 to protect the edge of full-open removable central panel section 12 once the score is ruptured and panel 12 is partly or fully removed from rim l6 and container body C.
  • the outer radial edge 50 of plastisol bead 48 covers the under surface of land portion 52 of score 14 so that should the score rupture with all or a portion of the land 52 remaining with removed central panel 12, there will remain therewith a corresponding radial outer protective plastisol bead edge.
  • Outer radial edge 50 should extend at least to the center line of score 14 or land 52, although preferably it extends to the outer radial edge of land 52 or about 0.010 inch therebeyond.
  • the profile of plastisol bead 48 is shown as substantially semispherical although it can be any profile which protects the ruptured score edge of the full-open removable section of central panel 12. Sometimes bead 48 will have a more or less flatened profile due to drawing effects of the material.
  • the thickest portion of bead 48 is radially inward of the score and preferably is at least the thickness of central panel 12, which for conventional central panels easy-opening end closures, is usually from about 0.010 to 0.020 inch.
  • FIG. 3 is an enlarged fragmentary sectional view similar to that of FIG. 2 showing score 14 ruptured and showing a section of central panel 12 upwardly removed from container body C.
  • Providing bead 48 along score 14 according to this invention and as shown in FIGS. 2 and 3 provides a broad blunt edge whose thickness may include the thickness of central panel 12, land 52 and plastisol bead 48, which combined thicknesses protect the hands, lips and other areas of consumers body which otherwise might be cut by solely the thickness of land portion 52 of central panel 12.
  • FIG. 3 shows land 52 remaining integral with central panel 12 after score 14 is ruptured, a portion or the entirety of land 52 may remain with the fullopen removable panel section or with rim 16 on container body C.
  • the outer radial edge 50 of plastisol bead 48 will extend at least along the undersurface and sometimes beyond the outermost score ruptured edge ofa removed section of central panel 12.
  • Materials which can be employed for forming bead 48 are conventional soft, piable, sealant materials preferably foamed or highly filled plastisols although the bead could be any other strongly adherent material having properties similar to those of such plastisols.
  • Highly filled or foamed plastisols typically are liquid dispersions of finely divided resins in plasticizers.
  • the resins can for example be polyvinyl chloride copolymers and the plasticizers esters of, e.g., thalates, adipates and citrates.
  • the plastisol materials contain stabilizers such as stearates and organo phosphates.
  • Fillers commonly employed for forming filled plastisols are silicates, sulphates such as barium sulphates and oxides and dioxides such as zinc oxide and titanium dioxide
  • An example of a suitable foaming agent for forming a foamed plastisol is an azo di-carboamide.
  • Typical such plastisols are manufactured by Dewey- Almy Company, a Division of Grace Chemical Company, and sold under the trade designation 7] 17, or by M and T Chemical Company, a Division of American Can Company, and sold under the trade designation MT 4657 and MT 4677.
  • Plastisol bead 48 can be employed in relation to container end closures made of any suitable metal such as aluminium, tin plate or steel. Although some plastisols adhere directly to such metals, usually a primer coating is applied to the undersurface of the metal end closure to obtain proper adhesion between the plastisol and the metal.
  • Typical primer coatings are either solution-vinyl coatings such as copolymers of vinyl cloride and vinyl acetate, usually stabilized for example with an epoxy resin, or, organisols which are dispersions of poly-vinyl cloride resins in organic solvents such as aromatic napthas and di-isobutyl ketones.
  • the solution-vinyl and organisol coatings typically include additional ingredients such as phenolic resins for adhereability, and for example urea formaldehydes for flexability.
  • Top end closure l0,-container body C and opening tab 28 can be of any suitable configuration or profile.
  • end closure 10 could have a straight, vertically downwardly-entending countersink wall which merges directly into a substantially horizontal or other profiled central panel.
  • score line 14 can be in the upper (exterior) or lower (interior) surface of central panel 12.
  • a full-open end closure is double seamed to a container body
  • the end closure includes a perpheral countersink wall, a full-open removable central panel section defined by a full-open score line adjacent the countersink wall and having a land portion, and an opening tab secured to the central panel near the score line so that the tab nose can rupture the score to leave a central panel rim between the countersink wall and the score
  • the container body sidewall has a radially inwardly-protruding annular bead underlyingly adjacent the central panel score to protect the rim edge once the score is ruptured

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
US315088A 1972-12-14 1972-12-14 Full-open easy-open container Expired - Lifetime US3891116A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US315088A US3891116A (en) 1972-12-14 1972-12-14 Full-open easy-open container
GB5635473A GB1410698A (en) 1972-12-14 1973-12-05 Full open easy open container
FR7344578A FR2327151A1 (fr) 1972-12-14 1973-12-13 Perfectionnements aux recipients a ouverture facile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US315088A US3891116A (en) 1972-12-14 1972-12-14 Full-open easy-open container

Publications (1)

Publication Number Publication Date
US3891116A true US3891116A (en) 1975-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
US315088A Expired - Lifetime US3891116A (en) 1972-12-14 1972-12-14 Full-open easy-open container

Country Status (3)

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US (1) US3891116A (cs)
FR (1) FR2327151A1 (cs)
GB (1) GB1410698A (cs)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044916A (en) * 1975-12-23 1977-08-30 Metal Box Limited Containers having protective opening edges
US4094434A (en) * 1976-12-13 1978-06-13 Coiner William A Disposable container for heatable food products
US4216736A (en) * 1979-02-02 1980-08-12 Boise Cascade Corporation Method and apparatus for forming no-fin scored metal ends
US4230659A (en) * 1978-05-31 1980-10-28 Airfix Industries Limited Method for forming a rupturable area in a container
US4467933A (en) * 1981-10-16 1984-08-28 American Can Company Warp resistant closure for sanitary cans
EP0268690A4 (en) * 1986-06-13 1989-12-19 Toyo Seikan Kaisha Ltd BOX COVER EASY TO OPEN AND ALLOWING PROTECTION OF THE EDGE OF THE CUT, AND METHOD FOR PRODUCING THE SAME.
US5301830A (en) * 1991-04-05 1994-04-12 Mueller Michael R Container
FR2895731A1 (fr) * 2006-01-05 2007-07-06 Joseph Aquilina Dispositif d'ouverture pour cannette de boisson
US20080047922A1 (en) * 2006-08-22 2008-02-28 Olson Christopher J Metal bottle seal

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430802A (en) * 1967-05-15 1969-03-04 American Can Co Easy-opening can
US3765561A (en) * 1972-03-10 1973-10-16 Continental Can Co Easy opening container provided with opening edge protective hot melt adhesive band
US3809283A (en) * 1969-05-22 1974-05-07 Continental Can Co Protective score shield for easy opening container

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK127747B (da) * 1969-05-22 1973-12-31 Continental Can Co Letåbnelig beholder.
US3696961A (en) * 1970-10-20 1972-10-10 Continental Can Co Protective edge for easy opening container
US3715052A (en) * 1971-11-08 1973-02-06 American Can Co Full panel self-opening end closure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3430802A (en) * 1967-05-15 1969-03-04 American Can Co Easy-opening can
US3809283A (en) * 1969-05-22 1974-05-07 Continental Can Co Protective score shield for easy opening container
US3765561A (en) * 1972-03-10 1973-10-16 Continental Can Co Easy opening container provided with opening edge protective hot melt adhesive band

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044916A (en) * 1975-12-23 1977-08-30 Metal Box Limited Containers having protective opening edges
US4094434A (en) * 1976-12-13 1978-06-13 Coiner William A Disposable container for heatable food products
US4230659A (en) * 1978-05-31 1980-10-28 Airfix Industries Limited Method for forming a rupturable area in a container
US4216736A (en) * 1979-02-02 1980-08-12 Boise Cascade Corporation Method and apparatus for forming no-fin scored metal ends
US4467933A (en) * 1981-10-16 1984-08-28 American Can Company Warp resistant closure for sanitary cans
EP0268690A4 (en) * 1986-06-13 1989-12-19 Toyo Seikan Kaisha Ltd BOX COVER EASY TO OPEN AND ALLOWING PROTECTION OF THE EDGE OF THE CUT, AND METHOD FOR PRODUCING THE SAME.
US5301830A (en) * 1991-04-05 1994-04-12 Mueller Michael R Container
FR2895731A1 (fr) * 2006-01-05 2007-07-06 Joseph Aquilina Dispositif d'ouverture pour cannette de boisson
WO2007077179A1 (fr) * 2006-01-05 2007-07-12 Joseph Aquilina Dispositif d'ouverture pour cannette de boisson
US20080047922A1 (en) * 2006-08-22 2008-02-28 Olson Christopher J Metal bottle seal
US10384838B2 (en) 2006-08-22 2019-08-20 Stolle Machinery Company, Llc Metal bottle seal

Also Published As

Publication number Publication date
FR2327151B1 (cs) 1978-03-24
FR2327151A1 (fr) 1977-05-06
GB1410698A (en) 1975-10-22

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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