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Publication numberUS3074798 A
Publication typeGrant
Publication dateJan 22, 1963
Filing dateMar 25, 1959
Priority dateMar 25, 1959
Publication numberUS 3074798 A, US 3074798A, US-A-3074798, US3074798 A, US3074798A
InventorsPalmer Charles E
Original AssigneePalmer Charles E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of packaging meat
US 3074798 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

1963 c. E. PALMER METHOD OF PACKAGING MEAT Filed March 2,5, 1959 FIG. 2

' INVENTOR. CHAEL 5 E. PALMER ATTO NEYS United States Patent 3,074,798 METHOD OF PACKAGING MEAT Charles E. Palmer, Turnpike Road, Somers, Conn. Filed Mar. 25, 1959, Ser. No. 801,839 4 Claims. ((21. 99-174 This invention relates to plastic packages, and more particularly to a novel plastic tray for packaging meats, poultry, fish, and the like.

In the packaging industry, the use of plastic containers has become wide-spread because of the appeal which transparent enclosures have to the consumer. Such packages enable the shopper to inspect the product, and oftentimes a pleasingly displayed item will engender a desire to purchase.

Conventional plastic packaging films alone have not been suitable in the meat packaging industry because a substantially rigid base or tray for the package is generally necessary. Thus, the meat packages employed in self-service stores usually consist of a cardboard or fiber tray upon which the meat is placed, and a heat-sealable plastic film encircles both tray and meat. Such packages have been objectionable in that the fiber tray absorbs the meat juices and becomes both soggy and unsightly. Additionally, the cardboard or fiber trays do not permit inspection of the bottom of the packaged article.

The term meat, as used herein, refers to meat, poultry, fish, and the like.

It has heretofore been proposed to form the tray from a rigid or semi-rigid plastic sheet to overcome the foregoing disadvantages. However, meat stored in such trays surprisingly has turned grey or brown within a short period of time, thus reducing greatly the value of such an enclosure.

It is an object of the present invention to provide a novel tray for meat packaging.

It is a specific object to provide a transparent plastic tray for meat packaging which substantially prevents discoloration of meats received therein.

A further object is to provide a blank for a transparent meat packaging tray which may be printed or otherwise decorated, and which is easily assembled.

Other objects and advantages will be readily apparent from the following detailed description and attached drawing wherein:

FIG. 1 is a perspective view of a meat package having a tray for-med from a blank prepared in accordance with this invention;

FIG. 2 is a plan view of a blank embodying the present invention;

FIG. 3 is a section along the line 3-3 of FIG. 2; and

FIG. 4 is a perspective view of a tray formed from the blank of FIG. 2 with one corner unassembled.

it has been found that a semi-rigid plastic tray which substantially prevents meat discoloration can be made from a blank consisting of a semi-rigid plastic sheet having a multiplicity of spaced perforations and placed in an envelope of flexible plastic film, i.e., interposed between two sheets of the film.

Although the nature of the beneficial effect accomplished by the combination of the perforated semi-rigid sheet and envelope of flexible plastic film is not fully understood, it is surmised that the heavy plastic sheet stock necessary to provide a semi-rigid tray is not permeable to gases, especially oxygen, and that this is the cause of the discoloration of the meats. In the present invention, the perforated structure of the semi-rigid sheet in cooperation with the envelope of relatively gas-permeable resilient film may provide both a reservoir of oxygen and a. gas-permeable structure at the perforations. It is "ice to be understood, however, that the invention is not to be limited to the foregoing theory of operation.

Referring to the attached drawing, the blank of the present invention is comprised of a semi-rigid plastic sheet 2 encased in an envelope of two sheets of flexible plastic film 4. The sheet 2 is provided with a plurality of spaced perforations 6 and the corners are incised to enable folding of the blank into a tray generally designated as 8. The corners are preferably incised as illustrated, with parallel cuts 10 on opposed sides and inwardly sloping cuts 12 on the other sides.

Although the flexible films 4 may correspond substantially to the incised configuration of the sheet 2, they are of a somewhat larger size to enable sealing the two films about their periphery as at 13 to provide a sealed envelope for the sheet 2. This is conveniently a rectangular, unincised envelope as illustrated.

The cover for the tray 8, may be any transparent plastic material, but is preferably a heat-scalable material to enable ready closure of the package as illustrated in PEG. 1 by the numeral 14. Exemplary of those that may be employed are cellulose acetate, polyethylene, rubber hydrochloride, polyvinylidene chloride and other conventional wrapping films.

Although numerous transparent plastic materials may be employed, the combination of a biaxially-oriented polystyrene semi-rigid sheet, and cellophane or cellulose acetate flexible films has been highly satisfactory. However, other transparent plastic materials are also satisfactory, including polyethylene, rubber hydrochloride, polyvinyls, and various cellulose ethers and esters.

The semi-rigid sheet member should be of suflicient thickness to provide the required degree of rigidity but should not be so thick as to prevent the folding up of the sides to make the tray. Generally, a thickness of about 0.005 to 0.015 inch, and preferably about 0.0075 to 0.010 inch is preferred. The films should be sufficiently thick to provide a high degree of flexibility commensurate with strength for durability.

The tray is conveniently formed from the blank by folding the sides and then adhering the cooperating film surfaces together either by heat-se-aling, or by application of adhesives or by use of a solvent to render the surfaces adherent.

The cover for the package may be any convenient plastic material. A heat-sealing film is most easily employed and may be adhered to the sides of the tray or to itself on the bottom of the tray.

The transparent trays formed from the blanks of the present invention enable storage of meats for prolonged periods of time. The plastic trays may be printed or decorated in a suitable manner if desired without substantially interfering with the transparent nature of the package.

Having thus described the invention, I claim:

1. A package of meat including a folded transparent tray container having a planar bottom wall and upstanding end and side walls, said tray container having a body member of a semi-rigid transparent plastic sheet encased in an envelope of transparent and relatively gas-permeable flexible plastic film providing layers of film on both sides of said body member, said plastic sheet having a multiplicity of perforations spaced about the major portion thereof; and meat supported in said container, said package being characterized by substantial freedom from discoloration of the meat for extended periods of time.

2. A package of meat consisting of a folded transparent tray having a planar bottom wall and upstanding end and side walls, said tray having a body member of a semi-rigid transparent plastic sheet encased in an envelop of transparent and relatively gas-permeable flexible plastic film providing layers of film on both sides of said body member, said plastic sheet having a multiplicity of perforations spaced about the major portion thereof; meat supported in said tray; and a cover of transparent plastic film for said tray, said package being characterized by substantial freedom from discoloration of the meat for extended periods of time.

3. In the method of packaging meat, the steps comprising encasing a semi-rigid transparent plastic sheet in an envelope of transparent flexible and relatively gas permeable plastic film, said semi-rigid plastic sheet having a multiplicity of perforations spaced about the major portion thereof and being incised at its corners for formation into a tray for receiving meat; folding said plastic sheet and film to provide a tray having a bottom Wall and upstanding side and end Walls, said envelope providing plastic film upon both sides of said plastic sheet to provide pockets of air in said tray at the perforations; placing meat into said try; and providing a cover of transparent plastic film over said meat and tray to enclose said meat and provide a package characterized by substantial freedom from discoloration of the meat for extended periods of time.

4. A blank for a transparent meat packaging tray comprising a planar semi-rigid transparent plastic sheet and an envelope of transparent flexible and relatively gaspermeable plastic film enca'sing said semi-rigid plastic sheet, said semi-rigid plastic sheet having a multiplicity of perforations spaced about the major portion thereof and being incised at its corners for formation into a tray for receiving meat, and said envelope providing plastic film upon both sides of said plastic sheet to provide pockets of air therein at the perforations.

References Cited in the file of this patent UNITED STATES PATENTS 1,234,730 Chapman July 31, 1917 1,482,727 Borchers Feb. 5, 1924 2,485,028 Bauernfrennd Oct. 18, 1949 2,717,731 Nerenberg Sept. 13, 1955 2,859,122 Maturi et al Nov. 4, 1958 2,870,954 Kulesza Jan. 27, 1959 2,918,379 Laurie Dec. 22, 1959

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1234730 *Nov 21, 1916Jul 31, 1917Cleander J ChapmanSheet-metal receptacle.
US1482727 *May 3, 1921Feb 5, 1924Julius BorchersBox and method of making the same
US2485028 *Jun 25, 1947Oct 18, 1949Jacob FreiCollapsible cosmetic and all-purpose utility box
US2717731 *Mar 15, 1952Sep 13, 1955Interstate Folding Box CoFully lined hinged lid automatic box
US2859122 *Oct 6, 1955Nov 4, 1958American Cyanamid CoMeat package
US2870954 *May 15, 1956Jan 27, 1959Reynolds Metals CoVacuum package
US2918379 *Aug 4, 1958Dec 22, 1959Campbell Lurie Plastics IncMeat packaging and the like
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3202276 *Dec 23, 1963Aug 24, 1965Procter & GamblePackage for cylindrical articles or objects
US3236435 *Oct 28, 1963Feb 22, 1966Robert G NicholsContainers
US3382078 *Sep 9, 1963May 7, 1968Union Carbide CorpFood package
US3508930 *Sep 7, 1966Apr 28, 1970Bennett Robert APackage for clams
US3978260 *Jul 10, 1975Aug 31, 1976American Can CompanyThermoplastics, multilayer
US4056221 *Dec 8, 1975Nov 1, 1977Ab Akerlund & RausingLaminated package
US4622693 *Apr 22, 1985Nov 11, 1986Cvp Systems, Inc.Collapsible bag and liner combination
US4815603 *Aug 16, 1988Mar 28, 1989Harris Charles CShrink wrap package with venting openings
US4869362 *Apr 20, 1987Sep 26, 1989Herr William APositive seal package
US5024538 *Mar 2, 1989Jun 18, 1991Luigi GoglioPackaging bag, especially for cooked ham, provided with drain valve
US5667827 *Oct 16, 1995Sep 16, 1997TranshumanceProcess of packaging fresh meat
US5686126 *Jun 6, 1995Nov 11, 1997W. R. Grace & Co.-Conn.Multilayer films for packaging meats
US5711978 *Dec 6, 1996Jan 27, 1998TranshumanceFresh meat packaging
US5779050 *Mar 11, 1997Jul 14, 1998W. R. Grace & Co.-Conn.Lidded package having a tab to facilitate peeling
US5779832 *Nov 25, 1996Jul 14, 1998W. R. Grace & Co.-Conn.Delamination, perforation
US5916615 *Jun 18, 1997Jun 29, 1999W. R. Grace & Co.-Conn.Meat, poultry packaging
US5919547 *Dec 11, 1996Jul 6, 1999Cryovac, Inc.Laminate having a coextruded, multilayer film which delaminates and package made therefrom
US6032800 *May 14, 1998Mar 7, 2000Cryovac, Inc.Laminate and package made therefrom
US6033758 *Jan 26, 1999Mar 7, 2000Cryovac, Inc.Laminate having a coextruded, multilayer film which delaminates and package made therefrom
US6042862 *Feb 25, 1998Mar 28, 2000Cryovac, Inc.Positioning web of partially heat-shrinkable film over support memeber having product; securing portion of web by forming heat-seal; severing segment of web in closed germetrical shape with cutting element
US6248380Nov 25, 1996Jun 19, 2001Cryovac, Inc.Package having a dual-film lid comprising a gas-impermeable film and a delaminatable, gas-permeable film
US6667067Apr 2, 1997Dec 23, 2003Cryovac, Inc.Packaging for fresh red meat
US6670023Dec 2, 1997Dec 30, 2003Cryovac, Inc.Laminate for case-ready packaging including a gas-impermeable film capable of delaminating into a gas-permeable portion and a gas-impermeable portion, and a gas-permeable film bonded thereto
US7141256Jan 17, 2003Nov 28, 2006Cryovac Inc.For butchered red meat
US8297491 *Mar 13, 2008Oct 30, 2012Cushionflute Pty. Ltd.Packaging container and blank
US20100089989 *Mar 13, 2008Apr 15, 2010John KwokPackaging container and blank
Classifications
U.S. Classification426/124, 426/396, 206/439, 426/129, 229/120, 206/557, 229/186
International ClassificationB65D81/24, A23B4/16, A23B4/14
Cooperative ClassificationA23B4/16, B65D81/24
European ClassificationB65D81/24, A23B4/16