US3701453A - Plastic ring pull easy open end - Google Patents

Plastic ring pull easy open end Download PDF

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Publication number
US3701453A
US3701453A US154064A US3701453DA US3701453A US 3701453 A US3701453 A US 3701453A US 154064 A US154064 A US 154064A US 3701453D A US3701453D A US 3701453DA US 3701453 A US3701453 A US 3701453A
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US
United States
Prior art keywords
combination
rim
plastic
open end
easy open
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
US154064A
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English (en)
Inventor
John Robert Platt
Stanley Edward Rohowetz
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
Application granted granted Critical
Publication of US3701453A publication Critical patent/US3701453A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/506—Rigid or semi-rigid members, e.g. plugs
    • B65D17/507—Rigid or semi-rigid members, e.g. plugs moulded in situ, e.g. during production of container
    • B65D17/508—Rigid or semi-rigid members, e.g. plugs moulded in situ, e.g. during production of container and combined with a rigid or semi-rigid, e.g. metallic sheet and a moulded plastic body

Definitions

  • This invention relates to metallic or other type easy open ends for containers, and more particularly to easy open ends having injection molded plastic permanently secured to some parts thereof and detachably'secured to other parts thereof.
  • the polyethylene or sealing means does not bond to the metal end closure blank, the same is merely placed under compression between the peripheral edges of the insert and wall so that a substantially hermetic seal is created between the insert and wall when the polyethylene subsequently hardens.
  • the instant invention employs an adhesive coating system so that the plastic may be permanently, rather than detachably, secured to the inside surface of the end rim (Cheeleys wall of the end closure), and thereby eliminate all problems of sharp, bare edge exposure.
  • Cheeley discloses as a sealing means only polyethylene, which cannot provide a true hermetic seal.
  • high density polyethylene has an oxygen transmission rate of 520 3900 ccJmiI/l sq. m./24 hrs./ 1 atm./73 deg. F., percent R.I-I. (ASTM D 1434).
  • Applicants recommended plastic member shows virtually a zero rate of oxygen transmission, and thereby provides a true hermetic seal. It will become apparent that applicants invention is superior for purposes of vacuum packing or where a hermetic container is desired.
  • Cheeleys sealing means does not bond to the metal end closure. For this reason, Cheeleys sealing means-metal end interface is not truly hermeticallysealed. It follows that since the sealing means, polyethylene, transmits oxygen at the rate stated above, and since the polyethylene sealing means does not bond to the metal end closure, Cheeleys container cannot be considered to be a hermetic container. Applicant provides an easy open end with plastic which transmits virtually no oxygen, and employs an adhesive coating system to bond the plastic to the container end, thereby providing an hermetic easy open end, which can be joined with a container body to form an hermetrc container.
  • the containers of the instant invention also provide the advantage over Cheeley of being able to tolerate SUMMARY OF THE INVENTION
  • the present invention provides, in combination, an easy open end of a container comprising a rim and a center panel insert, an adhesive coating system on the inside surface of the end, a sealing, adhesive plastic member detachably secured to the outside surface of the rim and permanently secured by means of the coating system to the inside surfaces of said rim and insert, whereby said insert is sealed to said rim, the plastic member being scored on its inside surface adjacent the inside peripheral edge of the rim, the rim being spaced from the center panel insert so that the plastic member substantially surrounds the panel inserts peripheral surface and outside and inside surfaces adjacent the insert peripheral surface, and handle means having an end interconnected to said plastic member and extending at least partly across said panel insert to provide means for tearing said plastic member along its score,
  • FIG. 1 is a perspective view of a container incorporating the easy open end of this invention.
  • FIG. 2 is a sectional view taken on the vertical plane indicated by the line 2-2 of FIG. 1.
  • FIG. 3 is the same as FIG. 2 except it shows the end after it has been opened.
  • FIG. 4 is an enlarged fragmentary view of the opened container of FIG. 3 at its score line.
  • FIG. 5 is a vertical sectional view showing essentially the same end as in FIGS. 1 4, but with slight modification to effect reclosure.
  • FIG. 6 is the same as FIG. 5 except it shows the end after it has been opened.
  • FIG. 7 is the end of FIG. 6 after it has been reclosed.
  • a container generally designated 11, comprising a container body 13, an easy open end 15, and an end closure 17.
  • FIGS. 2 and 3 show the relationship of the easy open end 15 to the container body 13, and the manner of opening container 11.
  • the easy open end 15 comprises a rim 19 and a center panel insert 21.
  • An adhesive plastic member 23 is detachably secured to the outside surface 25 of the rim 19 and permanently secured to the inside surface 27 of the rim 19 and the inside surface 29 of the center panel insert 21, thereby sealing the insert 21 to the rim 19.
  • the inside surfaces 27 and 29 are covered with an adhesive coating system 31 which enables the plastic member 23 to permanently bond to the inside surfaces 27 and 29 of the end 15.
  • the plastic member 23 has a score line 33 adjacent the inside peripheral edge 35 of the rim 19. This location of the score line 33 assures that the plastic member 23 will tear at or near the inside peripheral edge 35 of the rim 19, so that after opening of the container 11, there will remain no exposed, sharp, bare edges. Since the plastic member 23 is not permanently bonded to the outside surface 25 of the rim 19, the plastic member 23 separates from the rim 19 along the outside surface 25, thus assuring that the outside peripheral surface 37 as well as the inside surface 29 and the outside surface 39 adjacent the peripheral surface 37 of the insert 21, are substantially surrounded by the plastic member 23 after the container 11 is opened by the user thereof.
  • a release coating or film on the outside surface 25 of the rim 19 to assure a smooth and easy separation of the insert 21 and the plastic member 23 permanently bonded thereto from the rim 19.
  • FIG. 4 shows how the plastic member 23 tears from the score 33 to the inside peripheral edge 35 of the rim 19, leaving no exposed, sharp, bare edges. Even if the remaining plastic member 23 does not cover the entire inside peripheral surface 47 of the rim 19 after opening, it is sufficient to eliminate sharp, bare edge exposure because the plastic member 23 does remain secured to the area adjacent the inside peripheral edge 35. This minimum coverage of the edge 35 is guaranteed by the location of the score line 33 adjacent the edge 35. In many instances, the plastic member 23 tears in such a manner as to leave parts of the inside peripheral surface 47 coveredwith plastic member 23.
  • FIGS. 7 illustrate the same end as in FIGS. 1 4 but with slight modification, primarily in the rim 19, so that the end may be reclosed after opening.
  • the reclosure feature is achieved by providing the rim 19 with an area of undercut 49 into which the center panel insert 21 may be snapped after the original opening of the container.
  • the end may be comprised of tin free steel, electrolytic tin plated steel (ETP) or aluminum. It is also possible to employ various metal-plastic laminates for the end 15 It was found that the most suitable release coating $51; an epoxy urea formaldehyde, such as Midlands V
  • a recommended adhesive coating system 31 comprises a base coat on the inside rim surface 27 and the inside panel insert surface 29 such as Celanese epoxy urea formaldehyde 7164X together with a top coat such as Mortons ethylene acrylic acid copolymer Adcote 37F-l on the base coat.
  • the base coat is employed primarily for corrosion resistance, while the top coat provides adhesion between the plastic and the base coat. Ifthe contents of the container are not of a corrosive nature, then the adhesive coating system 31 may consist of only the top coat.
  • the adhesive plastic member 23 to be used in combination with the above adhesive coating system 31 should comprise, by weight, 20 60 percent matrix resin, 10 30 percent plasticizing resins, l0 50 percent inorganic filler and l to 5 percent pigment.
  • the addition of 1-10 percent by weight of elastomers and small percentages of stabilizing materials used in the plastic molding art may be employed for obtaining various desired product and processing properties.
  • One such plastic is as follows:
  • the MX 2375.12 is Dow Chemicals 8 percent acid matrix resin ethylene acrylic copolymer having a melt index of about 6. This resin is used as the primary matrix adhesive with medium strength and melt flow properties. It is also a copolymer having acid content which gives a bond to a suitable substrate such as polymers or other metals.
  • the BAA 9500 is Union Carbides 18 20 percent ethylene acrylic copolymer with a melt index of 300. It is a plasticizing resin added to increase the melt flow rate and to provide added acidity for bond formatlon.
  • High filler loadings reduce the tear strength of the plastic composition (a distinct aid in opening) without unduly reducing the peel or lap shear bond strengths.
  • Other advantages include improved heat transfer rates (20 times resin alone) and cost reduction.
  • Zopaque R69 is Glidden Durkees titanium dioxide pigment. It is employed for its fine particle size and EXAMPLE ll Ingredient by Weight 1. DQDA 2600 45 2. Novocite L207A 32.5 I 3. Dylan l5 4. Super Dylan 5 5. Zopaque R69 2.5
  • the DQDA 2600 is Union Carbides 8 percent acid matrix resin ethylene acrylic copolymer, and is similar to the MX 2375.12.
  • the Dylan is Sinclair Koppers low density polyethylene, while the Super Dylan is Sinclair Koppers high density polyethylene.
  • Example plastics were utilized in manufacturing an easy open end according to the present invention. Midland's V732 was used as the release coating.
  • the adhesive coating system consisted of a base coat of Celanese epoxy urea formaldehyde 7164X and a top coat of Mortons ethylene acrylic acid copolymer Adcote 37F-l. Ends made of the two examples are still being tested on completed containers. Example I has gone 49 days without any measurable oxygen permeation, while Example II has gone 6 months without any measurable oxygen permeation.
  • the adhesive plastic member comprises by weight 20 to percent matrix resin, 10 to 30 percent plasticizing resin, 10 to 50 percent inorganic filler and 1 to 5 percent pigment.
  • the adhesive coating system comprises a base coat of an epoxy urea formaldehyde and a top coat of an ethylene acrylic acid copolymer.
  • the matrix resin comprises an ethylene acrylic copolymer
  • the plasticizing resin comprises ethylene acrylic copolymer and low density polyethylene
  • the inorganic filler comprises natural silica
  • the pigment comprises titanium dioxide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Adhesives Or Adhesive Processes (AREA)
US154064A 1971-06-17 1971-06-17 Plastic ring pull easy open end Expired - Lifetime US3701453A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15406471A 1971-06-17 1971-06-17

Publications (1)

Publication Number Publication Date
US3701453A true US3701453A (en) 1972-10-31

Family

ID=22549852

Family Applications (1)

Application Number Title Priority Date Filing Date
US154064A Expired - Lifetime US3701453A (en) 1971-06-17 1971-06-17 Plastic ring pull easy open end

Country Status (5)

Country Link
US (1) US3701453A (OSRAM)
JP (1) JPS5353658Y2 (OSRAM)
CA (1) CA955546A (OSRAM)
FR (1) FR2142046B1 (OSRAM)
IT (1) IT958416B (OSRAM)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804287A (en) * 1972-07-10 1974-04-16 American Can Co End closure for an easy opening resealable container
US3861976A (en) * 1971-10-19 1975-01-21 Aluminum Co Of America Laminated container wall
US4155481A (en) * 1978-07-26 1979-05-22 Tokan Kogyo Co., Ltd. Container cover member having synthetic resin openable portion and method for making the same
FR2487299A1 (fr) * 1980-07-22 1982-01-29 Thomson Brandt Trappe hermetique pour enceinte etanche
FR2502584A1 (fr) * 1981-03-30 1982-10-01 Nihon Seikan Kk Procede pour former une incision dans une plaque extreme de boite de conserve et procede pour y fixer une languette pour faciliter l'ouverture de la boite
JPS5819925U (ja) * 1981-07-30 1983-02-07 本州製紙株式会社 易開封性容器蓋
US4427128A (en) 1982-10-13 1984-01-24 The Continental Group, Inc. Can and closure therefor
US4438864A (en) * 1982-06-09 1984-03-27 Container Corporation Of America Tamperproof closure
WO1991008958A1 (en) * 1989-12-18 1991-06-27 Polystar Packaging Incorporated A container closure and method for producing same
US5054641A (en) * 1988-04-07 1991-10-08 Showa Denko Kabushiki Kaisha Lid for can-like container and method of manufacturing same
EP0716986A1 (en) * 1994-12-13 1996-06-19 Marcello Fossi Arrangement for temporary reclosure of containers in particular for foodstuff
US5692635A (en) * 1990-06-06 1997-12-02 American National Can Company Easy open closure
US20040089664A1 (en) * 2002-11-12 2004-05-13 Sonoco Development, Inc. Easy-opening closure for retortable container
US20060021982A1 (en) * 2004-07-28 2006-02-02 Hekal Ihab M Container Closure
US20110000912A1 (en) * 2007-04-18 2011-01-06 Impress Group B.V. Container, Set Comprising a Ring, a Foil and a Lid, a Preset Therefor, and a Method for Producing the Set for the Container
US20110233213A1 (en) * 2004-10-25 2011-09-29 Impress Group B.V. Container With a Closing Sheet That Is Directly Connected And Clamped To The Container Wall
US20160288978A1 (en) * 2013-12-04 2016-10-06 Billerudkorsnäs Ab Sealable package and production thereof
US10882658B2 (en) * 2016-07-14 2021-01-05 Gregor Anton Piech Metallic can and associated can lid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184096A (en) * 1961-10-04 1965-05-18 Reynolds Metals Co Container seal and opening means

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861976A (en) * 1971-10-19 1975-01-21 Aluminum Co Of America Laminated container wall
US3804287A (en) * 1972-07-10 1974-04-16 American Can Co End closure for an easy opening resealable container
US4155481A (en) * 1978-07-26 1979-05-22 Tokan Kogyo Co., Ltd. Container cover member having synthetic resin openable portion and method for making the same
FR2487299A1 (fr) * 1980-07-22 1982-01-29 Thomson Brandt Trappe hermetique pour enceinte etanche
FR2502584A1 (fr) * 1981-03-30 1982-10-01 Nihon Seikan Kk Procede pour former une incision dans une plaque extreme de boite de conserve et procede pour y fixer une languette pour faciliter l'ouverture de la boite
JPS5819925U (ja) * 1981-07-30 1983-02-07 本州製紙株式会社 易開封性容器蓋
US4438864A (en) * 1982-06-09 1984-03-27 Container Corporation Of America Tamperproof closure
US4427128A (en) 1982-10-13 1984-01-24 The Continental Group, Inc. Can and closure therefor
US5054641A (en) * 1988-04-07 1991-10-08 Showa Denko Kabushiki Kaisha Lid for can-like container and method of manufacturing same
WO1991008958A1 (en) * 1989-12-18 1991-06-27 Polystar Packaging Incorporated A container closure and method for producing same
US5865335A (en) * 1990-06-06 1999-02-02 American National Can Company Easy-open closure
US5692635A (en) * 1990-06-06 1997-12-02 American National Can Company Easy open closure
EP0716986A1 (en) * 1994-12-13 1996-06-19 Marcello Fossi Arrangement for temporary reclosure of containers in particular for foodstuff
US20040089664A1 (en) * 2002-11-12 2004-05-13 Sonoco Development, Inc. Easy-opening closure for retortable container
US7055713B2 (en) * 2002-11-12 2006-06-06 Sonoco Development, Inc. Easy-opening closure for retortable container
US20060021982A1 (en) * 2004-07-28 2006-02-02 Hekal Ihab M Container Closure
GB2416763A (en) * 2004-07-28 2006-02-08 Creative Science Inc Plastic ring pull removable closure
GB2416763B (en) * 2004-07-28 2007-11-07 Creative Science Inc Container closure
US20110233213A1 (en) * 2004-10-25 2011-09-29 Impress Group B.V. Container With a Closing Sheet That Is Directly Connected And Clamped To The Container Wall
US20110000912A1 (en) * 2007-04-18 2011-01-06 Impress Group B.V. Container, Set Comprising a Ring, a Foil and a Lid, a Preset Therefor, and a Method for Producing the Set for the Container
US20160288978A1 (en) * 2013-12-04 2016-10-06 Billerudkorsnäs Ab Sealable package and production thereof
US10882658B2 (en) * 2016-07-14 2021-01-05 Gregor Anton Piech Metallic can and associated can lid

Also Published As

Publication number Publication date
JPS5353658Y2 (OSRAM) 1978-12-21
FR2142046B1 (OSRAM) 1978-08-04
CA955546A (en) 1974-10-01
IT958416B (it) 1973-10-20
JPS4812255U (OSRAM) 1973-02-10
FR2142046A1 (OSRAM) 1973-01-26

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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