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US3709399A - Food storage containers - Google Patents

Food storage containers Download PDF

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Publication number
US3709399A
US3709399A US00165246A US3709399DA US3709399A US 3709399 A US3709399 A US 3709399A US 00165246 A US00165246 A US 00165246A US 3709399D A US3709399D A US 3709399DA US 3709399 A US3709399 A US 3709399A
Authority
US
United States
Prior art keywords
wall
container
lid
open end
angle
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
US00165246A
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English (en)
Inventor
G Nughes
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Individual
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Individual
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Filing date
Publication date
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Application granted granted Critical
Publication of US3709399A publication Critical patent/US3709399A/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
    • B65D15/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials
    • B65D15/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums
    • B65D15/16—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made of plastics material
    • B65D15/18—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made of plastics material with end walls made of metal

Definitions

  • the present invention relates to food storage containers having a substantially rigid polypropylene body of low yieldability.
  • the body of such containers is conveniently injection moulded and has a circular cylindrical shape similar'to that conventional tin can" although a variety of other suitable shapes may be employed.
  • the body of the container is formed with an outwardly directed circumferential flange at the open end and a metal lid can be seamed to the flange of the body by means of a conventional double hook seam.
  • the novel polypropylene can body in conjunction with conventional metal lids and to join the body and the lid tin plate, the angle between the shoulder forming wall together by means of a conventional seam on a conventional' seaming machine operating on the so-called seam spinning principle.
  • the metal lids are formed with a peripheral flange parallel to the general plane of the lid axially displaced from this plane by a smallamount and joined to the main disc of the lid by anaxially extending wall.
  • Storage containers of this type are particularly suited for the manufacturing of food produce in view of various problems such as sterilization, longitudinal seaming, transference of metallic taste and susceptibility to acid and hydrogen sulphide attack, encountered with the use of metal cans which are explained in greaterdetail in U.S. Pat. No. 3,524,568.
  • Many of these problems are overcome, or at least minimized by the use of the polypropylene containerbody; for example, a polypropylene body can be injected moulded and thus does not have a longitudinal side seam as do conventional metal cans. There is thus no risk of the side seam weakening and no weak
  • the importance of the detailed configuration of the outwardly directed circumferentialflange for satisfactory seaming to a metal lid is also discussed in U.S. Pat. No.
  • the small axially extending wall portion of the lid which forms the above mentioned wall is never truly cylindrical, but has a slightly conical shape due to the conditions under which the lid is formed.
  • This conical shape varies from case to case; for example, in lids made of and the longitudinal axis of the lid (the cone angle) is typically between about 5 and about 6"30', while in lids of aluminum the cone angle varies in the range from about 330 to about 430.
  • the diameter of the lid wall could be increased slightly so that the lid would enlarge the container wall when pressed into the opening of the container body.
  • the circumferential flange it is possible, in-this case, for the circumferential flange to .warp and therefore to miss the hook formed by the flange during the seaming operation thereby forming an incomplete seal between the body and the lid.
  • a container for food comprises a polypropylene body of low yieldability having an open end with a circumferential flange and a metal lid seamed to the. circumferential flange, in which the lid has a frusto conical annular wall and the container wall is tapered in thickness toward the said open end, the length of the tapered portion being at least equal to the depth of the said frusto-conical wall.
  • This tapered portion of the container wall extends to the arcuate transition region between the container wall and the circumferential flange, beginning from which the thickness of the flange may be constant or, if desired, may still taper towards the outer edge of the flange in the known way.
  • the container wall is bevelled internally, the bevelled. portion being at an angle to the axis of the can which is at least equal to the angle of the wall of the lid.
  • the angle of bevel is in the range from about 3 to about 10, depending on the angle of taper of the wall of the lid;
  • the angle of bevel of the inside of the container wall is slightly greater than the angle of taper of the wall of the lid so that the pressure between the lid wall and the container wall is greatest at the region of contact between the lid and the wall remote from the flange.
  • the lid wall thus deforms the container wall as the lid is pressed into the opening, and this deformation is such asto ensure intimate contact between the flange of the lid and the circumferential flange of the container.
  • FIG. 1 is a partial axial section of part of a wall of a known type of polypropylene container showing a lid in position but before seaming;
  • FIG. 2 is a partial axial section of a part of a wall of a known type of polypropylene container in the same position as FIG. 1 but showing a lid of larger diameter in position;
  • FIG. 3 is a partial axial section of part of a wall of one embodiment of the invention.
  • FIG. 4 is a partial axial section of part of a wall of a second embodiment of the invention.
  • FIG. 5 is a partial axial section-of part of the wall of a third embodiment showing a lid immediately before it is pressed into the opening;
  • FIG. 6 is a partial axial section of the embodiment of FIG. 5 showing a lid after it has been pressed into position but before a circumferential seam has been formed.
  • FIGS. 1 and 2 these illustrate the disadvantages discussed above, of a lack of radial support for a container wall 16 by a wall 12 of a lid 10- pressed onto a container 14.
  • FIG. 1 due to the slight taper of the wall 12 (shown exagerated in FIG. 1) there is a gap 18 between the wall 16 and the wall 12 extending the length of the wall 12 with the exception of the end where it meets the flange.
  • the presence of this gap means that the wall 12 cannot provide the required support to hold the wall 16 rigidly during the seaming operation and this results in frequent failures and difficulties in the seaming operation.
  • the wall 16 of the container body 14 is progressively reduced in thickness from the inside, from a level 22 lower-than that of the central disc 10A of the lid 10 when the lid 10 is in position.
  • This reduction in thickness is effectively in the form of a bevel the angle of which is substantially the same as the angle of the wall 12 so that the wall fits snugly into the frusto-conical opening formed by the bevel 16A.
  • the bevelled portion 16A of the wall 16 is supported radially by the wall 12.
  • FIG. 4 is similar to that of FIG. 3, except that the frustoconical opening formed-by the bevel 16A has a step 168 at the level of the central disc 10A of the lid l0.
  • This arrangement has the advantage that when the lid 10 is removed by a conventional can opener which cuts or shears the lid at the line 24 the sharp edge thus produced will not project dangerously from the inside surface of the container.
  • the angle X of the bevel 16A is slightly greater than the angle X of the wall 12 of the lid (as seen in cross section).
  • the angle X could be 10 if the angle X were 6.
  • the diameter D of the upper end of the wall 12 adjacent the lid flange 10C is equal to the diameter of the corresponding part of the opening 16A of the container body 14. Consequently, when the lid 10 is pressed onto the container body 14 the bevelled region 16A of the container wall 16 is deformed by the wall 12 of the lid 10 as shown in FIG. 6. In this case the greatest pressure between the wall 12 and the container wall 16 occurs at the level of the central disc 10A of the lid.
  • the thickness of the container wall depends on the size of the container.
  • the thickness of the part 16 may typically be about 1.5 to about 2mm and.
  • the maximum value of the deformation of the container wall 16 illustrated in FIG. 6 is practically very small considering that the height H ofthe shoulder 12 of the lid 10 (FIG. 5) amounts generally to 2.5-6 mm and that the difference between the angles X and X is not more than about 7.
  • a container for food comprising a polypropylene body of low yieldability having a side wall defining an open end,
  • said side wall having a circumferential portion tapered in thickness towards said open end adjacent said open end, said tapered portion of said container wall is formed by an internal bevel on the'inner surface of the container wall, the length of said tapered portion axially of the container being at least equal to the depth of said frustoconical wall on said lid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Closures For Containers (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
  • Nonmetallic Welding Materials (AREA)
US00165246A 1970-08-11 1971-07-21 Food storage containers Expired - Lifetime US3709399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT69772/70A IT944549B (it) 1970-08-11 1970-08-11 Contenitore per prodotti alimentari

Publications (1)

Publication Number Publication Date
US3709399A true US3709399A (en) 1973-01-09

Family

ID=11312800

Family Applications (1)

Application Number Title Priority Date Filing Date
US00165246A Expired - Lifetime US3709399A (en) 1970-08-11 1971-07-21 Food storage containers

Country Status (17)

Country Link
US (1) US3709399A (de)
AT (1) AT315729B (de)
BE (1) BE771096A (de)
BR (1) BR7105133D0 (de)
CA (1) CA933875A (de)
DE (1) DE2139501B2 (de)
DK (1) DK125634B (de)
ES (1) ES202420Y (de)
FR (1) FR2102174B1 (de)
GB (1) GB1317116A (de)
IE (1) IE35466B1 (de)
IT (1) IT944549B (de)
LU (1) LU63684A1 (de)
NL (1) NL7111052A (de)
NO (1) NO126848B (de)
YU (1) YU33257B (de)
ZA (1) ZA714823B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365724A (en) * 1979-12-21 1982-12-28 Metal Box Limited Attaching closure to containers
EP0072452A1 (de) * 1981-08-03 1983-02-23 Ball Corporation Flanschausbildung für einen Kunststoffbehälter
GB2189215A (en) * 1986-04-17 1987-10-21 Int Paint Plc Container with seamed end wall
US4905859A (en) * 1988-06-27 1990-03-06 Hoogovens Groep B.V. Metal packaging can and method of making it
US4948006A (en) * 1986-12-02 1990-08-14 Dai Nippon Insatsu Kabushiki Kaisha Container with metallic cover and method of manufacturing the same
US4975132A (en) * 1987-10-30 1990-12-04 Tri-Tech Systems International, Inc. Plastic closures for containers and cans and methods and apparatus for producing such closures
WO1991002685A1 (en) * 1989-08-15 1991-03-07 Tri-Tech Systems International, Inc. Closure and access systems for containers and methods of manufacture and use
US5115938A (en) * 1987-10-30 1992-05-26 Tri-Tech Systems International, Inc. Containers and cans and method of and apparatus for producing the same
US5891380A (en) * 1989-12-28 1999-04-06 Zapata Innovative Closures, Inc. Tamper evident caps and methods
US20040035874A1 (en) * 2002-08-20 2004-02-26 Sonoco Development, Inc. Extrusion blow molding methods and articles made thereby
WO2008074103A2 (en) * 2006-09-13 2008-06-26 Funcional Drinks Inteligência Em Desenvolvimento De Produtos Ltda. Flange for a blow-molding container
CN102514786A (zh) * 2011-12-16 2012-06-27 吴江市黎里科龙铁艺装饰材料厂 一种罐体
US20160264298A1 (en) * 2013-10-25 2016-09-15 Jean-Luc Maral Anti-Staining Coating Composition
US20230032940A1 (en) * 2021-07-28 2023-02-02 Premier Material Concepts LLC Paintable and bondable laminate

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7703653U1 (de) * 1977-02-08 1977-05-12 Schmalbach Lubeca Hermetisch verschliessbare Verpackung
US5523045A (en) 1983-04-13 1996-06-04 American National Can Company Methods for injection molding and blow-molding multi-layer plastic articles
US6129960A (en) 1983-04-13 2000-10-10 Pechiney Plastic Packaging, Inc. Methods and apparatus for injection molding and injection blow molding multi-layer plastic and the articles made thereby
US5037285A (en) 1983-04-13 1991-08-06 American National Can Company Apparatus for injection molding and injection blow molding multi-layer articles
DE4102053C1 (de) * 1991-01-24 1992-10-08 Alcan Deutschland Gmbh, 3400 Goettingen, De

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2382378A (en) * 1943-11-02 1945-08-14 Continental Can Co Easy opening, reclosable container
US2816589A (en) * 1954-05-17 1957-12-17 Earl S Tupper Salad bowl
CA563775A (en) * 1958-09-23 S. Tupper Earl Mixing bowl
US3073478A (en) * 1957-05-10 1963-01-15 Continental Can Co Container and method of manufacture
US3341059A (en) * 1966-02-18 1967-09-12 American Can Co Thermoplastic container body
US3524568A (en) * 1967-04-11 1970-08-18 Star Stabilimento Alimentare Package for foodstuffs
US3543963A (en) * 1968-07-05 1970-12-01 Container Corp Plastic container and a method of making same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3197107A (en) * 1963-11-21 1965-07-27 American Can Co Container closure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA563775A (en) * 1958-09-23 S. Tupper Earl Mixing bowl
US2382378A (en) * 1943-11-02 1945-08-14 Continental Can Co Easy opening, reclosable container
US2816589A (en) * 1954-05-17 1957-12-17 Earl S Tupper Salad bowl
US3073478A (en) * 1957-05-10 1963-01-15 Continental Can Co Container and method of manufacture
US3341059A (en) * 1966-02-18 1967-09-12 American Can Co Thermoplastic container body
US3524568A (en) * 1967-04-11 1970-08-18 Star Stabilimento Alimentare Package for foodstuffs
US3543963A (en) * 1968-07-05 1970-12-01 Container Corp Plastic container and a method of making same

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365724A (en) * 1979-12-21 1982-12-28 Metal Box Limited Attaching closure to containers
EP0072452A1 (de) * 1981-08-03 1983-02-23 Ball Corporation Flanschausbildung für einen Kunststoffbehälter
GB2189215B (en) * 1986-04-17 1990-09-19 Int Paint Plc Bottom seam for a pail
GB2189215A (en) * 1986-04-17 1987-10-21 Int Paint Plc Container with seamed end wall
US4823973A (en) * 1986-04-17 1989-04-25 International Paint Plc Bottom seam for pail
US4948006A (en) * 1986-12-02 1990-08-14 Dai Nippon Insatsu Kabushiki Kaisha Container with metallic cover and method of manufacturing the same
US5115938A (en) * 1987-10-30 1992-05-26 Tri-Tech Systems International, Inc. Containers and cans and method of and apparatus for producing the same
US4975132A (en) * 1987-10-30 1990-12-04 Tri-Tech Systems International, Inc. Plastic closures for containers and cans and methods and apparatus for producing such closures
US5181615A (en) * 1987-10-30 1993-01-26 Innovative Closures, Inc. Plastic closures for containers and cans and methods of and apparatus for producing such closures
US4905859A (en) * 1988-06-27 1990-03-06 Hoogovens Groep B.V. Metal packaging can and method of making it
US5100009A (en) * 1989-05-03 1992-03-31 Tri-Tech Systems International Inc. Closure and access systems for containers and methods of manufacture and use
WO1991002685A1 (en) * 1989-08-15 1991-03-07 Tri-Tech Systems International, Inc. Closure and access systems for containers and methods of manufacture and use
US5891380A (en) * 1989-12-28 1999-04-06 Zapata Innovative Closures, Inc. Tamper evident caps and methods
US20040035874A1 (en) * 2002-08-20 2004-02-26 Sonoco Development, Inc. Extrusion blow molding methods and articles made thereby
WO2008074103A2 (en) * 2006-09-13 2008-06-26 Funcional Drinks Inteligência Em Desenvolvimento De Produtos Ltda. Flange for a blow-molding container
WO2008074103A3 (en) * 2006-09-13 2008-09-18 Funcional Drinks Inteligencia Flange for a blow-molding container
US20090317574A1 (en) * 2006-09-13 2009-12-24 Funci. Drinks Intel. Em Desen. De Produtos Ltda. Flange for a blow-molding container
CN102514786A (zh) * 2011-12-16 2012-06-27 吴江市黎里科龙铁艺装饰材料厂 一种罐体
US20160264298A1 (en) * 2013-10-25 2016-09-15 Jean-Luc Maral Anti-Staining Coating Composition
US20230032940A1 (en) * 2021-07-28 2023-02-02 Premier Material Concepts LLC Paintable and bondable laminate
US12187013B2 (en) * 2021-07-28 2025-01-07 Simona Pmc Llc Paintable and bondable laminate

Also Published As

Publication number Publication date
YU33257B (en) 1976-08-31
IT944549B (it) 1973-04-20
IE35466B1 (en) 1976-02-18
FR2102174B1 (de) 1976-05-28
ZA714823B (en) 1972-04-26
FR2102174A1 (de) 1972-04-07
DK125634B (da) 1973-03-19
ES202420U (es) 1975-11-16
DE2139501B2 (de) 1974-01-24
GB1317116A (en) 1973-05-16
IE35466L (en) 1972-02-11
YU200971A (en) 1976-03-31
DE2139501A1 (de) 1972-02-17
LU63684A1 (de) 1971-12-14
NO126848B (de) 1973-04-02
AT315729B (de) 1974-04-15
NL7111052A (de) 1972-02-15
BE771096A (fr) 1971-12-16
CA933875A (en) 1973-09-18
BR7105133D0 (pt) 1973-05-24
ES202420Y (es) 1976-03-01

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