Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3750827 A
Publication typeGrant
Publication dateAug 7, 1973
Filing dateMar 15, 1971
Priority dateMar 15, 1971
Publication numberUS 3750827 A, US 3750827A, US-A-3750827, US3750827 A, US3750827A
InventorsWick H
Original AssigneeNordischer Maschinenbau
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Containers
US 3750827 A
Abstract
The invention relates to a deep-drawn sterilisable metal container for foodstuffs. The container is of thin wall construction from metal foils, e.g. aluminium foil, coated at least on its inside with a thermo plastics layer. It is provided around its lower or base edge with an edge bead of double wall configuration which is folded or rolled either inwardly beneath the bottom wall or outwardly adjacent the side wall.
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

I United States Patent 11 1 1111 3,750,827 Wick 5] Aug. 7, 1973 CONTAINERS 3,416,702 12/1968 Hoenig 220/70 [75] Inventor: Helmut Wick, Lubeck, Germany 21 i TE Z S BR'X "A MF X E NPA N PPLlC Tl N [73] Ass1gnee: Nordischer Maschinenbau Rud 224 174 9 1959 A r 3 MF Baader, Lubeck, Germany ustra 1a [22] Filed: Mar. 15, 1971 Primary Examiner-Samuel B. Rorthberg Assistant Examiner-James R. Garrett [21] Appl 124A) Att0rney-Richards & Grier [52] [1.8. CI 220/74, 220/66, 220/70, [57] ABSTRACT MP The invention relates to a deep-drawn sterilisable metal Int. container for foodstuffs The container is f thin wall Field of Search construction from metal foils, e.g. aluminium foil, 229/ MF coated at least on its inside with a thermo plastics layer. It is provided around its lower or base edge with an References Cited edge bead of double wall configuration which is folded UNITED STATES PATENTS or rolled either inwardly beneath the bottom wall or 2,142,743 1 1939 Calleson et al. 220 66 x outwardly adjacent the Side Wall- 2,339,763 [/1944 Calleson et al. 2,541,081 2/1951 Lyon l Clam" 6 Draw'ng Flgures 3,233,8l3 2/1966 Wolford et al II'I'" "III, I "I, I

I'll

1 CONTAINERS This invention relates to deep-drawn sterilisable metal containers for example for containing foodstuffs. The invention is particularly concerned with the manufacture of containers from metal foils, e.g. aluminium foil which are coated at least interiorily with a thermo plastics layer, the body of the container having a flange around its open end to which a lid formed of the same material is welded, or otherwise sealed. In comparison with containers made from bare tin plate or sheet aluminium, containers of the above type generally have less stiffnessso that they readily become dented or perforated during transportation of the body of the container or when they are filled, or when they are closed and sealed. As a result they do not withstand autoclaving and/or washing.

Whilst it is known from German Gebrauchsmuster 6,807,656 to provide the body ofa container at its open end with an outwardly bent and rolled-in edge flange, and to arrange for a bent-over edge of a lid, which is to be sealed on the body, to engage over the rolled-in edge of the edge flange of the body, and this reinforces the top of the container, the base of the container is not reinforced and is consequently sensitive to damage. It is also known from German Gebrauchsmuster 6,812,346 to secure to a container body a lid formed from sheet aluminium coated with an inner layer of thermo-plastic material. In this case, the open end of the container body has an outwardly bent edge flange also coated on the inside with a thermo-plastic material with the edge of the lid projecting beyond the sealing edge of the edge flange of the body. This arrangement also provides reinforcement at the top container edge to some extent, but it is, in general, inadequate and apart from providing no reinforcement at the base of the container there are objections to this construction on hygenic grounds since there is an outwardly open gap between the edge of the lid and the edge flange of the body.

It is an object of the present invention to provide a light and cheap container for foodstuffs or the like which can be readily sealed and which has adequate stiffness particularly at its lower end either when empty or filled and also be capable of surviving treatment during autoclaving.

According to the present invention a deep-drawn sterilisable container of metal foil coated at least interiorily with a thermo-plastics layer, has integral bottom and side walls with the latter extending from an upper peripheral edge, and an integral folded lower edge bead of at least double wall configuration lying adjacent one of the bottom and side walls.

Containers formed in this way can be handled in almost the same way as those made from uncoated, thicker metal, and they allow the devices and machines hitherto used in the food industry still to be utilised. Where the side wall is of tapered form, to obtain optimum stackability the edge bead is folded or rolled inwardly beneath the bottom wall.

The invention may be carried into practice in a number of ways but several specific embodiments will now be described by way of example with reference to the accompanying drawings in which:

FIG. 1 shows the body of a container according to the invention with a lid unfitted and the base of the container being incomplete;

FIG. 2 shows the lid in a fitted position and a bead formed around the base of the container;

FIGS. 3 to 6 show alternative configurations of bead around the base of the container.

FIG. I illustrates a body 2 of a container which has been deep-drawn from a disc or strip of aluminium foil to provide a side wall 3 extending downwards from a flange 4 at the open end of the container, this flange having a rolled or beaded outer edge. The drawing process is such that the bottom wall 5 is drawn in as shown in FIG. 1 to produce a double walled annular edge 6 which is shown in FIG. 1 and which is subsequently formed in one of the ways shown in FIGS. 2 to 6 to provide a reinforcing head. The forming of the bead can take place after drawing down the side wall 3 prior to or after filling the container body or even after closure by means of the lid. In general however, the bead will be formed immediately after the deep-drawing process.

Additional reinforcement of the upper peripheral edge of the container can be provided, if necessary, by folding over or rolling-in the edge 10 of the lid with the folded over or rolled in edge head of the flange 4 of the container body.

These reinforcing edges on the upper or lower ends of the container can be formed by rotating tools of known form for example in the form of closure rollers, or pressing tools movably mounted with respect to the container axis or multi-part pressing tools disposed at right angles to the container axis. The metal used in general is aluminium foil and this is coated with a varnish or other suitable thermoplastics material to render the body and lid heat scalable. Alternatively the aluminium, before forming of the body and the lid, may be coated at least on one side which is to form the interior of the container with a sterilisable thermoplastics material acceptable for foodstuffs and capable of withstanding autoclaving.

By way of example only it is pointed out that in the production of containers of the kind as described above and having a volume of about 30 to 400 ml (cm") the following material may be used:

The body is made from an aluminium foil strip having a thickness of 60 to 200 um and laminated with a plastics film of between 40 and um, while for the lid there is used an aluminium foil strip of 50 to um laminated with a plastics film of 40 to 75 pm. The exact thicknesses depend more or less on the purpose and the stress of the container.

What we claim as our invention and desire to secure by Letters Patent is:

l. A deep-drawn container of metal foil coated at least interiorily with a thermoplastic layer, the container having integral bottom and side walls with the latter extending to an upper peripheral edge, said upper edge carrying a radially extending peripheral flange with a lid closing the container and engaging said flange, and an integral folded lower edge head of at least double wall configuration overlying and paralleling the outer face of a lower portion of the side wall of the container.

t III t i '4

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2142743 *Jan 31, 1936Jan 3, 1939Crown Cork & Seal CoMetallic container
US2339763 *Mar 21, 1941Jan 25, 1944Crown Cork & Seal CoContainer and method of making same
US2541081 *Dec 12, 1947Feb 13, 1951Albert Lyon GeorgeCircular tray
US3233813 *Jul 31, 1963Feb 8, 1966Reynolds Metals CoPie plate receptacle with stepped flange
US3416702 *Mar 13, 1966Dec 17, 1968Continental Can CoReinforced metallic container
US3516597 *Jan 4, 1968Jun 23, 1970Kaiser Aluminium Chem CorpFoil container
AU224174A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3921848 *Dec 3, 1973Nov 25, 1975AlusuisseAerosol dispensing and similar metal cans adapted to contain a pressurized fluid
US3946871 *Sep 27, 1974Mar 30, 1976Alcan Aluminum CorporationSealable and sterilizable package
US3946872 *Sep 27, 1974Mar 30, 1976Alcan Aluminum CorporationSealable and sterilizable package
US3997677 *Feb 7, 1975Dec 14, 1976Standard Packaging CorporationHigh temperature resistant hermetically sealed plastic tray packages
US4223798 *Jun 14, 1979Sep 23, 1980Swiss Aluminium Ltd.Can for preserving foodstuffs and process for its manufacture
US4333601 *Apr 28, 1980Jun 8, 1982Inauen Machinen AgAluminum foil lined package, particularly suitable for oil- and fat-containing products
US4617178 *Nov 5, 1984Oct 14, 1986Nichols Robert LMedical instrument sterilization container
US4900519 *Apr 10, 1989Feb 13, 1990Nichols Robert LMedical instrument sterilization container
US4915918 *Jun 17, 1988Apr 10, 1990Nichols Robert LMedical instrument sterilization container
US5011718 *May 4, 1988Apr 30, 1991Monarch Products, Inc.Method and apparatus for reducing residual levels of ethylene oxide in repeatedly sterilized polymeric devices
US5080874 *Apr 6, 1990Jan 14, 1992Nichols Robert LMedical instrument sterilization container
US5183643 *Sep 17, 1991Feb 2, 1993Nichols Robert LMedical instrument sterilization container
US5202098 *Apr 8, 1991Apr 13, 1993Nichols Robert LMedical instrument sterilization container with pressure induced positive drainage
US5213231 *Feb 20, 1991May 25, 1993Precision Valve CorporationAerosol container closure
US5219086 *May 16, 1991Jun 15, 1993Tetra Alfa Holdings S.A.Packing container for liquid, especially pressurized contents
US5227074 *Mar 4, 1991Jul 13, 1993Monarch Products, Inc.Filter for medical instrument sterilization containers and method for removing moisture and contaminants therefrom
US5228588 *Feb 16, 1990Jul 20, 1993Toyo Seikan Kaisha Ltd.Thickness-reduced deep-draw-formed can
US5308418 *Aug 25, 1992May 3, 1994Tetra Laval Holdings & Finance S.A.Packing container for liquid, especially pressurized contents
US5324489 *Mar 4, 1991Jun 28, 1994Johnson & Johnson Medical, Inc.Medical instrument sterilization container with a contaminant plug
US5474679 *Jul 1, 1993Dec 12, 1995Johnson & Johnson Medical, Inc.Filter for medical instrument sterilization containers
US5474738 *Oct 21, 1993Dec 12, 1995Johnson & Johnson Medical, Inc.Medical instrument sterilization container
US5736043 *Jun 7, 1995Apr 7, 1998Johnson & Johnson Medical, Inc.Filter for medical instrument sterilization containers
US5954219 *May 31, 1995Sep 21, 1999Johnson & Johnson Medical, Inc.Contaminant plug for medical instrument sterilization containers
US6145687 *Jun 22, 1999Nov 14, 2000Johnson & Johnson Medical, Inc.Contaminant plug for medical instrument sterilization containers
US6715628Aug 22, 2000Apr 6, 2004Steris Inc.Contaminant plug for medical instrument sterilization containers
US20100017988 *Jun 21, 2009Jan 28, 2010Ming-Hsiao LaiBucket and toilet brush set
EP0062385A2 *Apr 1, 1982Oct 13, 1982The Dow Chemical CompanyFood or beverage cans made from plastic coated steel sheet
EP0062385A3 *Apr 1, 1982Jun 15, 1983The Dow Chemical CompanyFood or beverage cans made from plastic coated steel sheet
EP0063395A2 *Apr 1, 1982Oct 27, 1982The Dow Chemical CompanyFood or beverage cans made from polyethylene copolymer coated sheet steel
EP0063395A3 *Apr 1, 1982Jun 1, 1983The Dow Chemical CompanyFood or beverage cans made from polyethylene copolymer coated sheet steel
Classifications
U.S. Classification220/619, 220/657, 220/62.22, 220/615, 220/658
International ClassificationB65D25/14
Cooperative ClassificationB65D7/12, B65D25/14
European ClassificationB65D7/12, B65D25/14