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 numberUS3720365 A
Publication typeGrant
Publication dateMar 13, 1973
Filing dateSep 21, 1970
Priority dateSep 21, 1970
Publication numberUS 3720365 A, US 3720365A, US-A-3720365, US3720365 A, US3720365A
InventorsUnger S
Original AssigneeStandard Oil Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Embossed container
US 3720365 A
Abstract
A container made of foam plastic and having improved strength and appearance includes a rim embossed to accept printing thereon, a sidewall integral with the inner edge of the rim at the uppermost portion of the sidewall, said sidewall tapering inwardly and bowing outwardly slightly, and a bottom integral with the lowermost portion of the sidewall, said bottom bowing inwardly slightly.
Images(3)
Previous page
Next page
Description  (OCR text may contain errors)

United States Patent 1 Unger 1March 13, 1973 1 EMBOSSED CONTAINER [75] Inventor: SteveA. Unger, Chicago, ill.

[73] Assignee: Standard Oil Company, Chicago, Ill. 22 Filed: Sept. 2i, 1970 211 Appl. No.: 75,654

[52] US. Cl. ..229/2.5, 229/15 R [51] Int. Cl. ..B65d 1/34 [58] Field of Search ....229/2.5, 1.5 R, 1.5 B; 220/74, 220/9 F; 215/1 C [56] References Cited UNITED STATES PATENTS 3,128,029 4/1964 Price .l .229 25 x 3,374,922 3/1968 Shelby ....229/l.5 B x Metzler Roesner....

2,014,297 Rutledge "229/25 2,125,793 8/1938 Linderman.... ..229/2.5

3,097,780 7/1963 Witmer i ..229/1 .5 R 3,098,597 7/1963 Johnson ..229/2.5

Primary Examiner-Donald F. Norton Attorney Arthur G. Gilkes, William T. McClain and John J. Connors [57] ABSTRACT A container made of foam plastic and having improved strength and appearance includes a rim embossed to accept printing thereon, a sidewall integral with the inner edge of the rim at the uppermost portion of the sidewall, said sidewall tapering inwardly and bowing outwardly slightly, and a bottom integral with the lowermost portion of the sidewall, said bottom bowing inwardly slightly.

11 Claims, 6 Drawing Figures PATENWDHARIBIUB 3,7 55

sneer 10F Fig. 1

l/V VE N T 01?. Steve A. Unger ATTORNEY IPATEYNTEDHARI 3mm 3 ,36

ShEEI 2 BF 3 INVEN TOR. Steve A. Unger PATENTEUHARI3I973 3,7 0,355

INVENTOR. Steve A. Unger EMBOSSED CONTAINER BACKGROUND Using conventional therinoforming processes, trays, cups, bowls, plates, and like containers can be made from foam plastic such as impact or crystal polystyrene. Because the foam plastic is a good insulator, these containers can hold hot food for a considerable time without undue cooling. In designing a container made from such foam plastic, it is desirable to maximize the structural strength of the container. However, it is equally desirable to provide an attractive appearing exterio'r. Decorating the rim of the container, for example, by printing a design thereon, is a sought after objective of the industry. These rims are symmetric about the center of the container. For example they may be round, i.e., circular, elliptical; or they may be rectangular and square configuration. A printed rim design must be concentric with the rim and center of the container otherwise, rim printing detracts from rather than enhances the appearance of the container.

THE INVENTION I have invented a container made of foam plastic which has improved strength and, quite surprisingly, can be readily imprinted with a concentric rim design. Strength is imparted to the container by the manner in which the rim, sidewall and bottom are joined together and the configuration of these elements. The rim extends outwardly circumscribing and defining an open round mouth in the container. Preferably, the rim curves slightly downwardly. The sidewall is integral with the inner edge of the rim at the uppermost portion of the sidewall, and this sidewall tapers inwardly and bows outwardly slightly from the central section of the container. Ther'ound bottom is integral with the lowermost portion of the sidewall and the bottom bows inwardly slightly toward the central section of the container. The round bottom has, overall, a smaller diameter than the rim, but it is proportional to the rim. Preferably, a round line-junction is provided in the foam plastic On the inside of the container where the bottom and the sidewall merge. Also, a round line-junction is provided in the foam plastic on the outside of the container where the rim and the-sidewall merge. These various structural features contribute to a greater or lesser degree to the strength of the container.

To enhancethe appearance of the container, the rim is embossed. It has been found that embossing the rim provides an area adapted to receive ink. The embossed portion is disposed generally along a line which is concentric with the outer rim edge. Preferably, the embossed portion includes a plurality of spaced, raised elements. Circumscribing these elements between a concentric with theouter rim. Minor deviations go unnoticed. This is especially true with the design shown in thedrawings. V

DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of my container looking down at the inside of the container.

FIG. 2 is a plan view of the bottom of my container.

FIG. 3 is a cross-sectional view taken along line 33 of FIG. I.

FIG. 4 is an enlarged, segmented view of the embossed portion of the rim shown in FlG. 1.

FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 4.

FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 4.

PREFERRED EMBODIMENT As best shown in FIGS. l-3, my container 10, for example in the form of a plate, includes an outwardly ex-, tending rim 12 which circumscribes and defines an open round mouth 14 in the container. Sidewall 16, integral with inner edge 18 of rim 12 at the uppermost portion 20 of the sidewall, connects the rim with the container's round bottom 22 which is integral with the lowermost portion 24 of the sidewall. Sidewall l6 tapers inwardly and bows outwardly slightly from the central section of container 10 and round bottom 22 bows inwardly slightly toward the central section of the container. To enhance strength, a round line-junction 26 is formed in the foam plastic on the inside of container 10 where bottom 22 and sidewall 16 merge, and a round line-junction 28 (FIGS. 2 and 3) is formed in the foam plastic on the outside of container 10 where the rim and sidewall merge.

The novel rim design of my invention is best shown in FIGS. 4 through 6. This rim 12 includes embossed portion 30 which provides an area adapted to receive ink. Embossed portion 30 is disposed generally along a line which is concentric with the outer rim edge 32 and the center of container 10. Also, it includes a plurality of spaced, raised elements 34 having a lazy S" configuration. These elements are ranged in series along rim I2. Rim l2 and the series of raised elements 34 are symmetric about the center of container 10. To enhance the appearance of container 10 and also make elements 34 stand up, these elements are circumscribed by two spaced, concentric circular rim creases 36 and 38. Since container 10 is made of foam plastic, it can be easily creased. Ink deposited on elements 34 form a generally symmetrical pattern along the rim which is concentric to the rim edge and center of the container. Thus, concentricity of the printed pattern on rim 12 is facilitated.

In order to test the improved structural strength of this container, bending tests were run contrasting the resistance to bending of my design with that of a conventional container. My novel container, as shown in FIGS. 1' through 6, was compared to a 9-inch diameter plate which had a generous radii blending the plate rim into the plate sidewall and the plate sidewall intothe plate bottom. There was no line-junction at the joints between the rim and sidewall and the bottom and sidewall. Virtually all conventional foam plastic plates have such a generous radii. Based on bending test results, it was found that my plate design had 28 percent more resistance to bending than such a representative conventional plate. Both plates used were equal in weight and density and the compositional matter from which the plates were made was essentially identical. Other tests were made but the materials and densities were not identical, and no conclusive information was available. However, it appeared that my design was nevertheless superior for equal weight samples. It is believed that the line junctions in my container design and the curvature of the sidewall and bottom contribute to its improved strength. Moreover, the outwardly bowing sidewalls increase the overall capacity of the container. Thus, it is conceivable that an 8-inch diameter plate of my design might be able to replace a 9-inch diameter plate of a conventional design.

I claim:

1. A container made of a foam plastic and comprising an outwardly extending rim circumscribing and defining an open round mouth in the container, said rim having thereon an embossed design which is between a pair of spaced, concentric creases in said rim,

a sidewall integral with the inner edge of the rim at the uppermost portion of the sidewall, said sidewall tapering inwardly and bowing outwardly slightly from the central section of the container, and

a round bottom integral with the lowermost portion of the sidewall, said bottom bowing inwardly slightly toward the central section of the container.

2. The container of claim 1 including a round linejunction in the foam plastic on the inside of the con tainer where the bottom and the sidewall merge.

3. The container of claim 1 wherein the rim is curved slightly downwardly.

4. The container of claim 3 including a round linejunction in the foam plastic on the outside of the container where the rim and sidewall merge.

5. An improved container made of a foam plastic wherein the improvement comprises a rim circumscribing and defining an open mouth in the container, said rim being symmetric about the center Of the container and having an embossed portion thereon which provides a site adapted to receive ink, said embossed portion including an element having a lazy S configuration and said portion being disposed generally along a line which is concentric with the outer rim edge and the center of the container.

6. The container of claim 5 wherein the embossed portion includes a plurality of spaced, raised elements.

7. The container of claim 5 including a sidewall integral with the inner edge of the rim at the uppermost portion of the sidewall and a bottom integral with the lowermost portion of the sidewall.

8. The container of claim 7 wherein the rim and the bottom have a generally round configuration, with the bottom being smaller but proportional to the rim, and the sidewall tapering inwardly to connect the rim and sidewall.

9. The container of claim 8 wherein the sidewall bows outwardly slightly from the center of the container and the bottom bows inwardly slightly toward the center of the container.

10. The container-of claim 11 including a round linejunction in the foam plastic on the inside of the container where the bottom and the sidewall merge, and a round lmequnctron m the foam plastic on the outside of the container where the rim and the sidewall merge.

11. The container of claim 10 wherein the rim is curved slightly downwardly.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2014297 *Jan 20, 1934Sep 10, 1935Sutherland Paper CoPaper dish and method and apparatus of forming
US2125793 *Jun 26, 1937Aug 2, 1938Kimberly StuartPaper utensil
US3097780 *Sep 12, 1961Jul 16, 1963American Can CoPaper plate
US3098597 *Feb 27, 1953Jul 23, 1963Kaiser Aluminium Chem CorpCooking and baking utensil
US3099377 *Aug 17, 1960Jul 30, 1963American Can CoDish or the like
US3128029 *Dec 3, 1959Apr 7, 1964St Regis Paper CoCup
US3346400 *Feb 8, 1965Oct 10, 1967American Excelsior CorpTray
US3374922 *Aug 26, 1964Mar 26, 1968Monsanto CoFoamed containers
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4349146 *Nov 28, 1980Sep 14, 1982Mobil Oil CorporationPackaging tray
US4623088 *Jun 28, 1985Nov 18, 1986Mobil Oil CorporationReinforced packaging tray
US4705471 *Aug 2, 1985Nov 10, 1987Mobil Oil CorporationMold for producing a plate
US4856704 *May 9, 1988Aug 15, 1989Ossid CorporationMachine packaging tray
US4899925 *Sep 6, 1988Feb 13, 1990Mobil Oil CorporationCrowned meat tray
US5050791 *Feb 8, 1990Sep 24, 1991Mobil Oil CorporationCrowned meat tray
US5088640 *Sep 6, 1991Feb 18, 1992James River Corporation Of VirginiaRigid four radii rim paper plate
US5230939 *Sep 4, 1990Jul 27, 1993James River Corporation Of VirginiaForming of pressed trays
US6491214 *Apr 17, 1998Dec 10, 2002The Procter & Gamble CompanyMulti-ply food container
US7540833 *Jan 22, 2008Jun 2, 2009Dixie Consumer Products LlcDisposable servingware containers with flange tabs
US8414464Sep 16, 2010Apr 9, 2013Dixie Consumer Products LlcApparatus for making paperboard pressware with controlled blank feed
US20110048999 *Aug 26, 2010Mar 3, 2011Wnek Patrick HContainer blank and container with denesting feature
WO1992004180A1 *Sep 4, 1991Mar 5, 1992James River CorpImproved forming of pressed trays
Classifications
U.S. Classification229/406, D07/585
International ClassificationB65D1/34
Cooperative ClassificationB65D1/34
European ClassificationB65D1/34