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 numberUS3194468 A
Publication typeGrant
Publication dateJul 13, 1965
Filing dateJun 11, 1962
Priority dateJun 11, 1962
Publication numberUS 3194468 A, US 3194468A, US-A-3194468, US3194468 A, US3194468A
InventorsBaron Ronald
Original AssigneeSomerville Ind Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Plastic drinking cups
US 3194468 A
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

July 13, 1965 R. BARON 3,194,468

PLASTIC DRINKING CUPS Filed June 11, 1962 FIG. 1

INVENTOR RONALD BARON BY%%TMZZZZ7/ ATTOR N EYS United States Patent 3,194,468 PLASTIC DRINKHQG CUPS Ronald Baron, Agincourt, Ontario, Canada, assignor, by mesne assignments, to Somerville Industries Limited, London, Ontario, Canada Ihled June 11, 1962, Ser. No. 201,643 2 Claims. (Cl. 229-15) This invention relates to thin-walled plastic drinking cups particularly of the disposable variety.-

Disposable drinking cups formed from processed paper have been used for many years but, of course, due to their nature and yieldably they are not as preferable to use as more rigid drinking container. Due to material advances in the plastic industry, it has now been possible economically to provide disposable thin-walled drinking cups formed from plastic. However, while the plastic cup is much more desirable from the point of View of its rigidity compared to paper cups and while both have the disadvantage that heat is readily transferred through them when they contain hot beverages, the more dense thin-walled plastic tends to transfer heat to the users hand a little more quickly as to bring about a disadvantage in this respect. A proposal has previously been made to form a cup of this kind, having a smooth interior surface, with external closely spaced apart protruding ribs having intervening valleys with a view to reducing its heat transferring characteristics to the hand of the user by causing the contacting surface of the users hand to engage the peaks of said ribs while spanning the valleys formed therebetween, thus to provide air circulating heat dissipating channels. While such a proposal has had some effect towards achieving this objective, it has not been possible to provide ribs of sufficient depth in such a thin-walled product to achieve the desired results.

The present invention avoids the difiiculties previously encountered in attaining the objective while providing additional advantages over the prior proposals. Accord-ing to the present invention, I provide a thin-walled plastic cup defined by a circumferential side wall and a base wherein the side wall is corrugated to form on the inside and outside surfaces a plurality of corresponding closely and circumferentially spaced longitudinally extending substantially parallel ribs and valleys of substantial depth, the spacing between the ribs being sufficiently close as to cause the contacting surfaces of the users hand to engage the peaks of said ribs while spanning the intervening valleys and wherein said valleys form heat dissipating air circulating channels.

The invention will be clearly understood by reference to the following detailed specification taken in conjunction with the accompanying drawings.

In the drawings:

FIG. 1 is a perspective illustration of the cup of the present invention.

FIG. 2 is a longitudinal section taken along the line 22 of FIG. 1; and

FIG. 3 is a fragmentary transverse section through the wall of the cup taken substantially along the line 3-3 of FIG. 2.

Referring to the drawings, A indicates a thin-walled thermo-plastic cup of generally conventional outline formed by injection molding and providing a hollow open topped body defined by a circumferential side wall joined by an integral base 11. The side wall 10, as shown, is of a corrugated form indicated at 12 as to form on the inside and outside walls a plurality of corresponding ribs and valley 13 and 14, respectively, and 15 and 16, respectively (FIG. 3), which ribs and valleys are disposed longitudinally of the cup body and are spaced ddAfib Patented July 13, 1965 apart circumferentially of the cup relatively closely such that this ribbing forms a gripping area so that the contacting surfaces of the users hand engage the peaks of the external ribs while spanning the intervening external valleys, thus to provide by way of the external valleys practical heat dissipating air circulating channels. By forming the ribs as corrugations so they occur on both the inside and outside of the cup wall, I am able to achieve reasonably deep valleys as to produce practical air circulating channels whereas in addition, the formation gives the cup a degree of flexibility such as to avoid possibility of fracture in normal use which can occur in a thin-walled stiffer body. In addition, it is possible to produce a cup from less material, thus achieving an economic advantage as well.

I prefer to form the external ribs in such a way as to provide a thicker wall at the apex thereof as indicated at 17 in FIG. 3. This tends to reduce the heat conductivity and tends to strengthen the structure but what is of more importance, the formation of these thicker apices has the additional important eflFect of making it possible to produce a very thin-walled cup while changing the direction of flow of the plastic for the thinner sections, thus obtaining a reorientation of the plastic which adds to the strength and physical properties of the article. This is achieved through the fact that as the hot fluid plastic is injected into the mold it follows the line f0 least resistance, i.e. the deeper cavities for the thicker section forming the thick apices of the ribs and then tends to expand c-ircumferentially to fill the thinner sections. Consequently, a much stronger cup is produced whereas if the larger apices in the mold were not employed, it would be necessary to provide for a thicker walled cup to achieve a structure of this character. Therefore, a substantial saving in plastic material is attained. It is preferred to form the wall of a thickness between .010" and .020" and to provide a thickness between .035 and .040" at the apices of the external ribs. However, it should be understood that while the preferred form of construction employs thick apices as described, the invention in its broadest aspect is not limited to this most practical formation and would apply to a thicker walled corrugated cup where this may be of practical use.

In addition to the advantages above defined, three further advantages are achieved in a cup of this formation since it permits better nesting of the cups for packaging and storage purposes, whereas from the point of view of health and the ditficulty of washing an internally grooved cup, it discourages re-use of improperly washed cups which would not be detected in the plainer variety. Moreover, it will help to discourage mobile beverage dispensers from re-using cups to dispense more of the beverage than would normally be accounted for by the number of cups that he is issued when starting out on his sales tour. This is so because even if he retrieves some of the used cups and attempts to rinse them for re-use, there will always be some indication by way of the internal valleys of its previous use, leading to the detection of such an improper practice.

Finally, and of particular importance, is the fact that the cup constructed according to the present invention can be manufactured faster than ordinary varieties through the fact that due to the corrugations, a greater surface area is exposed to the cooling effect of the dies so that the forming cycle can be shortened over that of the ordinary variety as to thus increase speed of production. Consequently, measured by the sum of the advantages, it is clear that the present invention achieves a marked advance in the art.

and external ribs and valleys extending in the direction;

of the longitudinal axis of said body, said external ribs terminating in peaks which form, a gripping area for the hand of a user, the spacing between the ribs being suificiently close as to cause the contacting surfaces of the users hand to engage the peaks of said ribs while span-' ning the intervening external valleys, said'external valleys forming heat-dissipating air circulating channels, said ribs and valleys being formed by converging portions of said side Wall, said valleys on the inside of said side wall being augmented with plastic where the portions of the side wall converge to thicken and strengthen the ribs on the outside of said side wall.

2. A moulded plastic cup as claimed in claim 1, in which the thickness of the side wall adjacent where the corrugations thereof coverage to form said valley-on the inside of said side wall is between .010" and i020 and the thickness of the external ribs attheir peaks is between .035" and '.040".

References Cited by the Examiner UNITED STATES PATENTS D. 159,599 8/50 Chaplin. a

' 549,394 11/95 Presnell 21511.3 2,115,654 4/38 Swofiiord. 215l00.5 X 2,493,380 1/50 Bailey 215--11.3 2,731,056 1/56 -Anson.. t 2,799,435 7/57 Abplanalp 264-328 X 2,899,110 8/59 Parker i 150-.5 3,001,683 V 9/61 Goodwin et a1. 229-25 3,045,887 7/62 Caine p i229-l.5 3,073,025 2/63 Welshon 229-15 3,079,027 2/63 Edwards 220--9 3,082,900 3/63 Goodman 220-15 3,085,730 4/63 Fibish 229--1.5

THERON E. CONDON, Primary Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US549394 *Nov 5, 1895 Nursing-bottle protector
US2115654 *Feb 4, 1937Apr 26, 1938Peter J SwoffordBottle and can container
US2493380 *Feb 27, 1948Jan 3, 1950Bailey TheodoreNursing bottle
US2731056 *Apr 14, 1953Jan 17, 1956Arthur H AnsonMolded article
US2799435 *Jun 9, 1954Jul 16, 1957John J BaesslerMolded nylon container
US2899110 *Mar 12, 1957Aug 11, 1959 Parker
US3001683 *Jan 23, 1959Sep 26, 1961American Seal Kap CorpPaper container
US3045887 *Jan 28, 1958Jul 24, 1962Caine James RThin walled plastic container
US3078025 *May 10, 1961Feb 19, 1963Illinois Tool WorksSheet formed molded articles
US3079027 *Dec 10, 1959Feb 26, 1963Illinois Tool WorksDouble walled nestable plastic container
US3082900 *Jul 21, 1959Mar 26, 1963Foster Grant Co IncMulti-wall insulating receptacle
US3085730 *May 1, 1961Apr 16, 1963Illinois Tool WorksPlastic containers
USD159599 *Dec 20, 1948Aug 8, 1950 Molded cup
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3367554 *Sep 7, 1965Feb 6, 1968Continental Can CoDrawn containers
US3375554 *May 5, 1965Apr 2, 1968Blumer ArminInjection mould for plastic injection moulding machines for the production of axially symmetrical hollow bodies
US3441192 *May 17, 1967Apr 29, 1969American Can CoThermoformed plastic cup with reinforced side wall
US3443715 *Jan 18, 1968May 13, 1969Illinois Tool WorksDouble wall container
US3495736 *Jun 17, 1968Feb 17, 1970Inland Steel CoHelically beaded container
US3590751 *Dec 15, 1967Jul 6, 1971Atlas Pallet CorpStructure
US3944124 *Jul 24, 1972Mar 16, 1976Schmalbach-Lubeca-Werke AgPlastic containers
US4089682 *Nov 24, 1976May 16, 1978Mitsubishi Kinzoku Kabushiki KaishaCobalt-base sintered alloy
US4093454 *Nov 24, 1976Jun 6, 1978Mitsubishi Kinzoku Kabushiki KaishaNickel-base sintered alloy
US4169537 *Mar 22, 1978Oct 2, 1979Centennial Plastics Co., Inc.Storage drum
US4807775 *Mar 18, 1987Feb 28, 1989Acebo CompanyInjection molding of thin-walled plastic products
US4844405 *Jan 26, 1987Jul 4, 1989Acebo CompanyInjection molding of thin-walled plastic products
US5008064 *Jun 5, 1989Apr 16, 1991PrimtecInjection-molding dimension-control and clamp-reduction
US5149482 *May 30, 1990Sep 22, 1992PrimtecControlling wall thickness, solidification of initially injected plastic to stabilizer core of mold
US5174469 *Nov 13, 1990Dec 29, 1992Policapelli Nini EPartially collapsible container with drinking straw or pour spout
US5226585 *Nov 19, 1991Jul 13, 1993Sherwood Tool, Inc.Disposable biodegradable insulated container and method for making
US5262112 *Jul 10, 1992Nov 16, 1993PrimtecDimension-control and clamp reduction during injection molding of laminated products
US5267685 *Feb 25, 1993Dec 7, 1993PrimtecStackability of hollow products with conically contoured sidewalls having longitudinal folds
US5279442 *Dec 18, 1991Jan 18, 1994Ball CorporationDrawn and ironed container and apparatus and method for forming same
US5305911 *Oct 16, 1992Apr 26, 1994Sandusky Plastics, Inc.Faceted container
US5363982 *Mar 7, 1994Nov 15, 1994Sadlier Claus EMulti-layered insulated cup formed of one continuous sheet
US5415339 *Apr 11, 1994May 16, 1995Howard; Jeremy C.Drinking cup with open ribbed sidewall
US5449089 *Feb 2, 1994Sep 12, 1995Williams Industries, Inc.Bell fountain cup
US5586681 *Jan 26, 1995Dec 24, 1996Policappelli; Nini E.Container for dispensing liquids
US5657897 *Nov 8, 1995Aug 19, 1997Packerware CorporationBeverage container constructed to accommodate cup holders of different sizes
US5660326 *Apr 30, 1996Aug 26, 1997Sherwood Tool IncorporatedMulti-layered insulated cup formed from folded sheet
US5772111 *May 1, 1996Jun 30, 1998Kirsch; John M.Container structure
US5820016 *May 13, 1996Oct 13, 1998Dunkin' Donuts IncorporatedCup and lid
US5858286 *Jan 10, 1996Jan 12, 1999Universal VenturesBalanced multi-cavity injection molding of ridged-wall plastic products
US5964400 *Jun 13, 1997Oct 12, 1999Sherwood Tool IncMulti-layered insulated cup formed from folded sheet
US6354458Nov 24, 1997Mar 12, 2002Nini PolicappelliTop for container
US6960316Oct 30, 2002Nov 1, 2005Sorensen Research And Development TrustInjection-molded plastic container or closure with turned-under rim and method of injection-molding same
US7458504Oct 12, 2006Dec 2, 2008Huhtamaki Consumer Packaging, Inc.Multi walled container and method
US7922071Aug 5, 2008Apr 12, 2011Huhtamaki, Inc.Multi walled container and method
US7993254Oct 26, 2007Aug 9, 2011Huhtamaki, Inc.Multi walled container and method
US8100289Mar 24, 2010Jan 24, 2012Earthkare Packaging Innovations CompanyContainer with integral lid retained onto the top of the sidewall of the container by a living hinge, the container used to retain hot liquids
US8151577 *Dec 22, 2008Apr 10, 2012Hydro-Turbine Developments Pty LtdFrozen beverage device
US8336732Mar 24, 2010Dec 25, 2012Earthkare Packaging Innovations CompanyContainer with an integral lid retained onto the top of the sidewall of the container by a living hinge, the container used to retain hot liquids, the container having a thermal barrier incorporated into the exterior surface of the container
US20110020515 *Dec 22, 2008Jan 27, 2011Alfio BucceriFrozen beverage device
USRE35830 *Aug 16, 1996Jun 30, 1998Insul-Air Holdings, Inc.Multi-layered insulated cup formed of one continuous sheet
EP0612665A1 *Jan 24, 1994Aug 31, 1994SORENSEN, Jens OleStackability of hollow products with conically contoured sidewalls having longitudinal folds
EP2363353A1 *Mar 5, 2010Sep 7, 2011Didar AlmabekovContainer for drinks
WO2005120306A1 *Aug 5, 2004Dec 22, 2005Luigi SteccaA glass for consuming and tasting drinks
Classifications
U.S. Classification229/400, D07/530, 220/675
International ClassificationB65D1/26
Cooperative ClassificationB65D81/3865, B65D1/265, B65D1/44
European ClassificationB65D1/26B