|Publication number||US2738915 A|
|Publication date||Mar 20, 1956|
|Filing date||Jan 10, 1952|
|Priority date||Jan 10, 1952|
|Publication number||US 2738915 A, US 2738915A, US-A-2738915, US2738915 A, US2738915A|
|Inventors||St Clair Truman|
|Original Assignee||Continental Can Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (11), Referenced by (79), Classifications (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
March 20, 1956 T. ST. CLAIR 2,738,915
MOLDED SERVICE TRAY Filed Jan. 10. 1952 A TTORNEYJ.
United States Patent MOLDED SERVICE TRAY Truman St. Clair, Chicago, Ill., assignor, by mesne assignments, to Continental Can Company, Inc., New York, N. Y., a corporation of New York Application January 10, 1952, Serial No. 265,831
3 Claims. (Cl. 229-25 This invention relates to a new and improved tray for use in the service of food or the like, and relates more particularly to a service tray of the type described divided into sections for the separation of food carried thereon. The invention has application particularly to tray members of the type described formed of relatively weak and nonrigid materials, such as a molded plastic sheet stock, fibrous sheets, or fiber sheets treated with a resinous material to improve the wet strength and water repellency thereof.
-In the construction of a sectional tray of the type described, wherein division is achieved by ribs formed thereon to converge from opposite walls to a substantially common point in an adjacent wall intermediate the sides, a line of pivot is established at the point where the rib sections merge or were about to merge into the wall portion to the extent that the tray may be easily bent along the ribbed sections. A tray of the type described possesses insui'licient rigidity and strength properly to hold substances deposited thereon, especially when it is held at a corner portion set off from the remainder of the tray by the ribbed section. Insutficient rigidity results even in the presence of a single rib section diagonally arranged between intermediate side Walls or connecting opposite side walls.
It is an object of this invention to produce a sectional service tray of the type described which is free of the objectionable features which have characterized structures heretofore produced.
Another object is to produce a sectional service tray of the type described which obviates the existence of pivotal points along sectioning ribs formed therein.
A further object is to produce a sectional tray of the type described formed with separate sections in a manner to eliminate pivotal points which have heretofore rendered such trays so easily bendable as to be incapable of functioning in the manner for which it was intended.
These and other objects and advantages of this invention will hereinafter appear, and for purposes of illustration, but not of limitation, an embodiment of the invention is shown in the accompanying drawing, in which Figure 1 is a perspective view .of a tray member embodying features of this invention; Figure 2 is a top plan view of the tray shown in Figure 1; Figure 3 is a sectional view taken along the line 3-3 of Figure 2; and Figure 4 is a sectional elevational view taken along the line 4-4 of Figure 2.
By way of illustration, reference will be made to a preferred tray structure embodying features of this invention, but it will be understood that the inventive concepts may also be embodied in other sectional trays where fiexure or bending can readily take place because of the establishment of one or more pivotal points along ribbed sectional members.
As previously pointed out, bending characteristics of the type which this invention is intended to overcome do not exist in tray members formed of metal or other material having a wall thickness and strength to obviate 2,738,915 Patented Mar. 20, 1956 ice bending. The features of this invention are particularly beneficial in tray structures molded of thin plastic sheet stock, thin metal film, or fibrous sheet stock which may or may not be impregnated or coated with resinous or other plastic material to impart wet strength and to militate against absorption or penetration of fluids from the food contained therein into the pores of the fibrous structure.
As shown in the drawing, 10 represents a tray having a bottom wall 11, side walls 12, 13, 14, and 15 extending upwardly from the edges thereof, and a flanged portion 16 extending outwardly from the upper ends of the side walls to provide a dished container. When molded of fibrous sheet stock, the edge portions in the vicinity of the corner sections are preferably formed with flutes 17 to take up the excess material and to provide greater rigidity as well as a more attractive appearance to the tray.
The tray is divided into separate sections 18, 19, and 20 by a pair of ribs 21 and 22 formed to extend upwardly from the bottom wall and converge from opposite side walls 12 and 14 to an intermediate portion of an adjacent wall 15. The ribbed sections which merge into adjacent side walls in the manner described, form lines about which the separated sections may be bent with very little elfort. As a result, if the tray is held by one of the separated corner sections or the other, the tray is highly likely to collapse when food is placed therein, with consequent spillage of the ingredients.
It has been found that the tendency for the tray to bend or collapse along lines formed by the ribs may be overcome by embossing the wall portion into which the ribs substantially merge to form an inwardly-extending 0r outwardly-extending groove 23 which crosses the pivotal point and extends a substantial distance in either direction beyond the line formed by the rib or ribs so as to provide an effective stifiening action along the line of pivot. Where the ribs converge, as in the illustrated embodiment, it is best to form the embossed groove portion as a continuing section which extends beyond the line extensions from each rib in both directions. The stiffen ing groove or grooves 23 are preferably located in the wall section immediately above the merging rib and in parallel relation with the bottom wall so as to cross the line of pivot at a point where it is most capable of inactivating the same.
Where the rib ends just in advance of the side walls or back walls, marked improvement results from the use of embossed sections of the type described in the side wall portion which crosses the line formed by the exten sion of the rib.
Ordinarily, it will be sufiicient if a single embossed section is provided in one wall to cross the rib line, but, in the event that greater rigidity is required, embossed sections of the type described may be formed in the wall portions to cross the line formed by the extension of the ribbing into the respective wall portions.
Further resistance to the bending action may be achieved by forming the end portion of the rib into a number of flutes 24 which extend substantially parallel to the adjacent wall and cross the line of pivot.
It will be understood that changes may be made in end walls and converging from opposite side walls to an intermediate portion oFan end 'waIl'to subdivide the tray into separated dished sectionsswhereby lines of weakness and. resistance. to bendingtextend. along the. ribs and eon.-
centrate at the line. of convergence inthe. end wall,..a.
horizontally disposed groove. embossed in the end wall above. the; level of .the convergingribs. butbelow the upper edge thereofin the path .of the lines of convergence of the ribsand in. which the. groove is dimensioned to. extend.
laterally ashort distance. beyond. the lines of convergence. 2. A 'dished tray as claimed in claim 1 in which the embossure forming the. groove extends outwardly, as distinguishedfrom downwardly, in the end wall portion im- 7 mediately above the converging ribs.
3.' A dished tray, as. claimed, in claim 1 in which the embossure forming the groove is dimensionedv in crosssection to have itsupper horizontally disposed edge portion spaced. downwardly from the upper edge of the end wall and its lower horizontally disposed edge portion spaced a short distance above the level ofthe ribs formed" upwardly in the bottom wall of the tray.
References Cited in the file of this patent UNITED STATES PATENTS
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US192955 *||Jun 8, 1877||Jul 10, 1877||Improvement in butter-dishes|
|US1595356 *||Nov 10, 1924||Aug 10, 1926||Baldwin & Company Ltd A||Compartment plate or platter|
|US1708456 *||Aug 16, 1928||Apr 9, 1929||Jacob Tunick||Spoon|
|US1848066 *||Jul 12, 1929||Mar 1, 1932||Fidelity Trust Company||Molded pulp article|
|US1866035 *||Feb 1, 1930||Jul 5, 1932||Fidelity Trust Company||Container|
|US2014297 *||Jan 20, 1934||Sep 10, 1935||Sutherland Paper Co||Paper dish and method and apparatus of forming|
|US2161109 *||Mar 28, 1935||Jun 6, 1939||John Thomas Henry||Ashtray|
|US2296808 *||Oct 31, 1940||Sep 22, 1942||Chaplin Corp||Reinforced molded fiber container|
|USD133867 *||Jul 30, 1942||Sep 22, 1942||Design for a molded fiber tray|
|USD157107 *||Nov 1, 1948||Jan 31, 1950||Combined portable tray and heater|
|USRE19813 *||Nov 21, 1932||Jan 7, 1936||Cake plate|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3051346 *||Feb 19, 1959||Aug 28, 1962||Reynolds Metals Co||Curved divider tray|
|US3067922 *||Aug 12, 1960||Dec 11, 1962||American Can Co||Service plate or tray|
|US3097780 *||Sep 12, 1961||Jul 16, 1963||American Can Co||Paper plate|
|US3104776 *||Sep 6, 1961||Sep 24, 1963||Plastic container|
|US3140807 *||Apr 12, 1963||Jul 14, 1964||Poster Packaging Inc||Container|
|US3358647 *||Feb 23, 1966||Dec 19, 1967||Wilson Henry A||Pet pan|
|US3386417 *||Aug 19, 1966||Jun 4, 1968||Eugene C. Machowski||Sanitary station for pet animals|
|US3601277 *||Aug 20, 1969||Aug 24, 1971||Sinclair Koppers Co||Disposable food tray|
|US3633785 *||Aug 25, 1969||Jan 11, 1972||Standard Oil Co||Hot food container|
|US3675811 *||Dec 18, 1969||Jul 11, 1972||Grace W R & Co||Vending container with cover therefor|
|US3731658 *||Aug 17, 1971||May 8, 1973||Livermore D||Disposable pet and animal dish|
|US3938727 *||Aug 5, 1974||Feb 17, 1976||Duni Bila Ab||Disposable cardboard plates|
|US4660734 *||Apr 4, 1986||Apr 28, 1987||The Vollrath Company||Steam table pan|
|US5236119 *||Nov 5, 1992||Aug 17, 1993||Chu Ming Hsiang||Paper plate|
|US6065633 *||Feb 6, 1998||May 23, 2000||Roller Coater, Inc.||Multi-purpose receptacle|
|US6105813 *||Jun 25, 1997||Aug 22, 2000||Roller Coater, Inc.||Multi purpose paint bucket|
|US6199715 *||Feb 3, 1999||Mar 13, 2001||Tenneco Packaging Specialty And Consumer Products, Inc.||Disposable foil container|
|US6257401||May 14, 1999||Jul 10, 2001||Pactiv Corporation||Vented container with handles and embossment|
|US6349847||Oct 6, 2000||Feb 26, 2002||Pactiv Corporation||Vented container with handles and embossment|
|US6571980||Sep 5, 2002||Jun 3, 2003||Fort James Corporation||Smooth profiled food service articles|
|US6886704||Oct 22, 2002||May 3, 2005||Pactiv Corporation||Containers and container assemblies with releasable locking feature|
|US7013618||Sep 19, 2002||Mar 21, 2006||Pactiv Corporation||Compartment plates having themes and method for manufacturing and packaging the same|
|US7104030||Sep 19, 2002||Sep 12, 2006||Pactiv Corporation||Compartment plates having themes and method for manufacturing and packaging the same|
|US7172072||Sep 19, 2002||Feb 6, 2007||Pactiv Corporation||Compartment plates having themes and method for manufacturing and packaging the same|
|US7482053||Nov 23, 2004||Jan 27, 2009||Dixie Consumer Products Llc||Thermoformed food containers with enhanced rigidity|
|US7506489||Jun 18, 2007||Mar 24, 2009||Pactiv Corporation||Compartment plates having themes and method for manufacturing and packaging the same|
|US7735651||Feb 10, 2008||Jun 15, 2010||Edison Nation, Llc||Food serving tray assembly having disposal opening with deep serving wells|
|US7736580||Feb 10, 2008||Jun 15, 2010||Edison Nation, Llc||Making food serving tray assembly having disposal opening with deep serving wells|
|US7802684||Feb 10, 2008||Sep 28, 2010||Edison Nation, Llc||Food serving tray assembly having disposal opening with deep serving wells|
|US7857160 *||May 28, 2004||Dec 28, 2010||Sealed Air Corporation||Optimized tray for case-ready meat|
|US7934449||Aug 14, 2006||May 3, 2011||Edison Nation, Llc||Serving tray and food container|
|US8006369||Feb 10, 2008||Aug 30, 2011||Edison Nation, Llc||Making food serving tray assembly having disposal opening with deep serving wells|
|US8083084||Sep 6, 2007||Dec 27, 2011||Pwp Industries, Inc.||Invertible tray|
|US8343560||Sep 28, 2006||Jan 1, 2013||Reynolds Consumer Products Inc.||Modular container assembly and merchandizing container display|
|US8414464||Sep 16, 2010||Apr 9, 2013||Dixie Consumer Products Llc||Apparatus for making paperboard pressware with controlled blank feed|
|US9157453 *||Aug 23, 2011||Oct 13, 2015||Ctb, Inc.||Plastic fan shroud and cone assembly and method|
|US20030066776 *||Sep 19, 2002||Apr 10, 2003||Schiltz David C.||Compartment plates having themes and method for manufacturing and packaging the same|
|US20030070956 *||Sep 19, 2002||Apr 17, 2003||Schiltz David C.||Compartment plates having themes and method for manufacturing and packaging the same|
|US20040074902 *||Oct 22, 2002||Apr 22, 2004||Hayes Thomas J.||Containers and container assemblies with releasable locking feature|
|US20040185200 *||Apr 2, 2004||Sep 23, 2004||Fort James Corporation||Disposable food contact compatible microwaveable containers having at least one micronodular surface and process for their manufacture|
|US20050092742 *||Nov 23, 2004||May 5, 2005||Swiontek Anthony J.||Thermoformed food containers with enhanced rigidity|
|US20050098554 *||May 7, 2004||May 12, 2005||Hayes Thomas J.||Containers and container assemblies with releasable locking feature|
|US20050189350 *||Feb 11, 2005||Sep 1, 2005||Pactiv Corporation||Container assemblies with releasable locking feature|
|US20050230389 *||Mar 31, 2005||Oct 20, 2005||Hayes Thomas J||Container assemblies with releasable locking feature|
|US20050263530 *||May 28, 2004||Dec 1, 2005||Sealed Air Corporation||Optimized tray for case-ready meat|
|US20060156695 *||Jan 11, 2006||Jul 20, 2006||Pactiv Corporation||Compartment plates having themes and method for manufacturing and packaging the same|
|US20060159807 *||Oct 21, 2005||Jul 20, 2006||Hayes Thomas J||Container assemblies with releasable locking feature|
|US20070007288 *||Sep 18, 2006||Jan 11, 2007||Hayes Thomas J||Methods of using containers and container assemblies with interlocking features|
|US20070023428 *||Jul 25, 2006||Feb 1, 2007||Pactiv Corporation||Container assemblies with releasable locking feature|
|US20070062965 *||Aug 14, 2006||Mar 22, 2007||Bouncing Brain Productions Subsidiary 8, Llc||Appetizer food tray assembly|
|US20070172554 *||Sep 28, 2006||Jul 26, 2007||Pactiv Corporation||Modular container assembly and merchandizing container display|
|US20090021058 *||Jul 16, 2007||Jan 22, 2009||Mark Andrew Rajack||Molded storage tray for concessions|
|US20090065514 *||Sep 6, 2007||Mar 12, 2009||Terry Vovan||Invertible tray|
|US20090089993 *||Feb 10, 2008||Apr 9, 2009||Jerry Shew||Making food serving tray assembly having disposal opening with deep serving wells|
|US20090090648 *||Feb 10, 2008||Apr 9, 2009||Jerry Shew||Food serving tray assembly having disposal opening with deep serving wells|
|US20090090649 *||Feb 10, 2008||Apr 9, 2009||Jerry Shew||Food serving tray assembly having disposal opening with deep serving wells|
|US20090091059 *||Feb 10, 2008||Apr 9, 2009||Jerry Shew||Making food serving tray assembly having disposal opening with deep serving wells|
|US20090092719 *||Feb 10, 2008||Apr 9, 2009||Jerry Shew||Using food serving tray assembly having disposal opening with deep serving wells|
|US20090092738 *||Feb 10, 2008||Apr 9, 2009||Jerry Shew||Using food serving tray assembly having disposal opening with deep serving wells|
|US20090200194 *||Feb 10, 2008||Aug 13, 2009||Kovacevich Ian D||Serving platter having disposal opening and shallow sealing lid|
|US20090200195 *||Feb 10, 2008||Aug 13, 2009||Kovacevich Ian D||Serving platter having disposal opening and shallow sealing lid|
|US20090200197 *||Feb 10, 2008||Aug 13, 2009||Kovacevich Ian D||Using serving platter having disposal opening and shallow sealing lid|
|US20090200316 *||Feb 10, 2008||Aug 13, 2009||Kovacevich Ian D||Making serving platter having disposal opening and shallow sealing lid|
|US20090200701 *||Feb 10, 2008||Aug 13, 2009||Kovacevich Ian D||Making serving platter having disposal opening and shallow sealing lid|
|US20100181226 *||Feb 27, 2009||Jul 22, 2010||Kovacevich Ian D||Food container assembly|
|US20110015051 *||Sep 16, 2010||Jan 20, 2011||Dixie Consumer Products Llc||Apparatus for making paperboard pressware with controlled blank feed|
|US20130051999 *||Aug 23, 2011||Feb 28, 2013||Ctb, Inc.||Plastic fan shroud and cone assembly and method|
|USD432914||May 27, 1999||Oct 31, 2000||Pactiv Corporation||Bottom for a container|
|USD433334||May 27, 1999||Nov 7, 2000||Pactiv Corporation||Cover for a container|
|USD439160||Sep 3, 1999||Mar 20, 2001||Tenneco Packaging Inc.||Container|
|USD443205||May 14, 1999||Jun 5, 2001||Tenneco Packaging Inc.||Bottom for a container|
|USD444382||Oct 6, 1999||Jul 3, 2001||Pactiv Corporation||Cover for a container|
|USD480922||Oct 31, 2002||Oct 21, 2003||Pactiv Corporation||Plate having condiment wells|
|USD481260||Oct 31, 2002||Oct 28, 2003||Pactiv Corporation||Plate having condiment wells|
|USD481592||Oct 31, 2002||Nov 4, 2003||Pactiv Corporation||Plate having condiment wells|
|USD483998||Oct 31, 2002||Dec 23, 2003||Pactiv Corporation||Plate having condiment wells|
|USD485731||Feb 19, 2003||Jan 27, 2004||Pactiv Corporation||Plate having two compartments|
|USD489941||Oct 31, 2002||May 18, 2004||Pactiv Corporation||Plate having condiment wells|
|EP1072521A3 *||Jul 10, 2000||Jul 31, 2002||Georgia-Pacific Corporation||Compartmented disposable plate with asymmetric rib geometry|
|U.S. Classification||229/406, 220/575, D07/555|
|International Classification||A47G19/00, A47G19/03|