US3045887A - Thin walled plastic container - Google Patents

Thin walled plastic container Download PDF

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Publication number
US3045887A
US3045887A US711739A US71173958A US3045887A US 3045887 A US3045887 A US 3045887A US 711739 A US711739 A US 711739A US 71173958 A US71173958 A US 71173958A US 3045887 A US3045887 A US 3045887A
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cup
portion
wall
bottom
corrugations
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James R Caine
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James R Caine
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/22Boxes or like containers with side walls of substantial depth for enclosing contents
    • B65D1/26Thin-walled containers, e.g. formed by deep-drawing operations
    • B65D1/265Drinking cups

Description

July 24, 1962 J. R. CAINE THIN WALLED PLASTIC CONTAINER Filed Jan. 28, 1958 INVENTOR.

JAMES R. CAM/E ATTORNEY United States Patent 3,045,ss7 THIN WALLED PLASTIC CONTAINER James R. Caine, 797 Crestview Ave., Akron, Ohio Filed Jan. 28, 1958, Ser. No. 711,739 Claims. (Cl. 229-1.5)

This invention relates to plastic containers and more particularly to plastic drinking cups.

Plastic cups are recognized as in many ways more desirable than paper cups, but heretofore have been very expensive. The preferred cup of this invention is made relatively inexpensive by having the middle portion of the wall of the cup-that is, the portion around the cup between the top and the bottom portions of the wallrelatively thin. The portions of the wall above and below this are made relatively thick so that the cup holds its shape not only when filled with a liquid but also, so that it does not collapse (although it gives somewhat) when pressure is applied to opposite sides of it by a person grasping it to lift it to drink from it. If the entire wall is made too thin the cup does not hold its shape. If it is made too thick it is too expensive. By making the upper portion of the wall of the cupthat is, from the rim down about one to two fifths of the way of plastic that is thick enough to hold its shape and withstand the pressure of a person grasping the cup, the upper portion of the cup is made to retain its shape. Similarly, by making the cup from the bottom up about one to two fifths of the height of the cup of thicker plastic, the cup retains its shape not only when lifted but when filled with liquid, and resting on any flat surface. The bottom of the cup is made thick enough so that when the cup is lifted it will retain its shape without sagging too much. Thus the top portion of the wall,

and the bottom of the cup are preferably made thicker than the middle portion of the wall of the cup.

The cup of this invention is advantageously drawn from a heated sheet of plastic. If a rigid polystyrene is used and the cup is to be used for hot drinks, this sheet may advantageously be about 0.035 to 0.055 inch thick; for cold drinks it may be thinner. In drawing this stock to form the cup, the top and bottom portions of the wall of the cup are made about 0.015 to 0.025 inch thick, and the central portion may be as thin as about 0.006 to 0.014 inch thick. The bottom of the cup will then be about 0.015 to 0.025 inch thick. The bottom of the cup need not be the same thickness as the thicker portions of the walls. The proportion of the wall expanse that is thickened may be varied. Ordinarily the very top of the cup will be thick so that it stands upright and does not become distorted when put to ones lips.

When the cup is drawn from plastic, the thick portions extend from the lip of the cup and from the bottom of the cup, and the bottom of the cup itself is ordinarily of approximately the same thickness as the bottom portion of the wall, although this is not necessary. It will depend on the manner of drawing the cup.

The thicker and thinner portions of the cup of this invention gradually shade into one another. There is no sharp stepping off of the wall from a thicker portion to a thinner portion.

The Wall of the preferred cup of this invention tapers outwardly from the bottom up, so that the cups may be nested in one another. To facilitate nesting, and to in crease the volume content of the cup, the upper portion advantageously tapers outwardly at a somewhat greater angle than the bottom portion. Thus the bottom portion of the wall may taper at an angle of about 5 degrees, and the angle of the upper portion may be about 10 degrees. In the preferred cup of this invention, the wall 3,M5,887 Patented July 24, 1962 is stepped outwardly from the lower tapering portion to the upper tapering portion, and the bottom of the upwardly tapering portion is preferably corrugated. The corrugations prevent one cup from fitting tightly within another. Thus, each of a nest of the cups has its bottom held above the bottom of the next lower cup by a distance equal to the height of the corrugations. As will be explained in detail in what follows, this is because the corrugations are not symmetrical around the cup.

In drinking a very hot liquid or a very cold liquid from the cup, if the cup is held at the corrugations the rate of heat transfer between the cup and the fingers holding the cup is much lower than if the cup is held at a smooth portion of the wall. This is because the corrugations reduce the area contact between the wall of the cup and the fingers. As a consequence, a cup containing a very hot or a very cold liquid can be held more comfortably at the corrugation than elsewhere.

In order to give added strength to the top of the wall and thus reduce its tendency to flatten when grasped by the fingers of a person lifting the cup, or by mechanism employed in dispensing individual cups from a nest of the cups, the cup may advantageously he stepped outwardly within a small fraction of an inch of the top of p the cup. This outwardly extending portion at the top of the wall is held in the worm gears of a dispensing unit from which the cup is dispensed, and also tends to prevent collapse of the cup, as do the outwardly extending portions of the wall at the corrugations.

The invention will be further described in connection with the accompanying drawings.

FIG. 1 is a perspective view of a cup embodying the principles of the present invention.

FTG. 2 is a section through the corrugated portion of the cup on the line 22 of FIG. 1.

FIG. 3 is a vertical section of the cup on the line 33 of FIG. 1.

FIG. 4 is an enlarged section through the corrugations of the cup showing that the individual corrugations are not identical.

The drawings are illustrative and it will be understood that modifications are possible within the scope of the invention as defined in the claims.

A finished cup of the preferred design is shown in FIGS. 14. The walls taper upwardly and outwardly. The taper of the lower portion 260 is not as great as that of the upper portion 261. The corrugated area 262 is immediately below the upper portion 261. At the top and .the bottom of the corrugations the cup is stepped inwardly at 264 and 265. The individual corrugations are not uniform in cross section, as illustrated in FIG. 4, so that when one cup nests in another cup the corrugations do not mate with one another (except very rarely), but the upper cup is held out of any large surface contact with the lower cup. If the corrugations were uniform and the cups nested snugly Within one another it would be diflicult to separate them because a vacuum would be created between the two cups on separation. The corrugations prevent formation of a vacuum because air is easily transferred around them from the upper portion to the lower portion of the cup. The portion 266 of the wall, which is immediately above the corrugations, is stepped outwardly from the corrugations to permit the flow of air to the corrugations when the cups are nested. Substantially the only contact between the nested cups is the contacting area of the corrugated portion of an upper cup resting on the corrugated portion of a lower cup.

The portion 266 of the wall of the cup above the corrugations is somewhat thicker than the portion of the wall 267 at the middle of the cup below the corrugations. Also, the bottom 268 of the cup and the bottom of the wall 269 are somewhat thicker than this middle portion. In a drinking cup of the proportions illustrated, made of rigid polystyrene, the bottom 268 of the cup and the two wall portions 266 and 269 are advantageously about 0.025 inch thick, and the thin portion 267 is about 0.008 inch thick. The cup is stepped outwardly at 270 near the rim to give a degree of rigidity to the cup which is not attained with a sheer wall. The cup is thus designed to be light in weight and use a minimum of plastic, while being sufficiently rigid to be readily dispensed from automatic dispensing machines and to be held by a drinker without danger of collapsing.

The corrugations permit easy separation of nested cups in a dispensing machine and give small surface contact with the fingers of a person drinking from the cup, reducing the transfer of heat either from the cup to the person, or from the person to the cup.

Modifications in the shape of the container are possible Without departing from the scope of the claims which follow. A preferred method of making the present container and an apparatus capable of carrying out the method are disclosed in my copending application Serial No. 176,148 filed February 27, 1962, which constitutes a division of the present application.

This application is a continuation-in-p-art of my application Serial No. 612,614 filed September 28, 1956.

What I claim is:

1. A thin-walled plastic cup-like container of the type which would normally be gripped by hand comprising a bottom and annular flexible wall means extending upwardly from the periphery of said bottom and terminating in an open top, said annular wall means including a lower annular section adjacent said bottom, an upper annular section defining said open top and a central annular section between said upper and lower sections constituting a substantial part of said Wall means, said upper section having a wall thickness and cross-sectional configuration producing a resistance to inward deflection not substantially greater than that sufficient to hold its shape when manually handled, said lower section and said bottom having a wall thickness and cross-sectional configuration providing a resistance to inward deflection not substantially greater than that suflicient to hold their shape when the container is filled and either resting on a flat surface or lifted therefrom, said central section adjacent said lower section gradually decreasing in wall thickness upwardly from said lower section from a thickness genenally equal to the thickness of said lower section to a minimum thickness, and adjacent said upper section gradually decreasing in wall thickness downwardly from said upper section from a thickness generally equal to the thickness of said upper section to said minimum thickness, said minimum thickness being of such dimension that a planar-wall container of corresponding capacity having a uniform wall thickness of such dimension would be relatively unstable when manually handled in a liquid-filled condition, said central section including the area of said wall means which would normally be grasped when said container is manually handled and having an annular portion within such area shaped without increase of thickness so as to provide a resistance to inward deflection greater than that provided by a corresponding portion of said minimum thickness which is planar in section.

2. A container as defined in claim 1 wherein the upper extremity of said upper annular section is formed with a radially projecting annular portion and wherein said lower annular section includes an annular portion shaped without increase of thickness so as to provide a resistance to inward deflection greater than that provided by a corresponding portion of corresponding thickness which is planar in cross-sectional configuration.

3. A container as defined in claim 1 wherein said annular portion is disposed adjacent said upper section and comprises a plurality of projections extending outwardly beyond the portion of said wall means disposed therebelow, said projections presenting spaced finger-engaging surfaces having substantial downwardly facing horizontal components so that said container can be supported by finger engagement beneath said surfaces with less inward gripping pressure than that required to support a smoothsurface cylinder with its axis vertical, the contact area and distance between said finger-engaging surfaces being such that the rate of heat transfer between said annular portion and fingers of a person holding the container is much lower than if the container is held at a smooth portion of said wall means so that when it contains a very hot or a very cold liquid it can be held more comfortably at said surfaces than elsewhere.

4. A container as defined in claim 3 wherein said annular portion comprises top and bottom peripherally disposed projections superpositioned with respect to each other, the top projection being of greater diameter than the bottom projection and an intermediate band portion extending between said top and bottom projections, said intermediate band portion providing a plurality of relatively closely spaced serrations between said top and bottom projections.

5. A container as defined in claim 4 wherein said intermediate band portion extends between the outer periphery of said bottom projection and the inner periphery of the top projection, the inner periphery of the top projection being of a dimension no greater than the dimension of the outer periphery of the bottom projection, and serrations extending vertically throughout said intermediate band portion between said top and bottom projections and being spaced circumferentially within said band portion, at least some of said serrations having a size and spacing which vary from the size and spacing of other sci-nations.

References Cited in the file of this patent UNITED STATES PATENTS 1,800,491 Zoia Apr. 14, 1931 1,908,806 Allen May 15, 1933 1,931,210 Steinacher Oct. 17, 1933 2,345,876 Kohrtz Apr. 4, 1944 2,367,799 Hull Jan. 23, 1945 2,412,178 Seigh Dec. 3, 1946 2,412,325 Devine et al Dec. 10, 1946 12,438,844 Dale Mar. 30, 1948 2,530,124 Kieckhefer Nov 14, 1950 2,605,855 Lenz Aug. 5, 1952 2,695,423 Pardee Nov. 30, 1954 2,805,790 Smucker Sept. 10, 1957 2,889,072 Lapham June 2, 1959 2,905,350 Edwards Sept. 22, 1959 2,942,301 Price et al June 28, 1960

US711739A 1958-01-28 1958-01-28 Thin walled plastic container Expired - Lifetime US3045887A (en)

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Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123273A (en) * 1964-03-03 Cup for hot beverages
US3126139A (en) * 1964-03-24 Partially insulated plastic container
US3142422A (en) * 1959-08-10 1964-07-28 Mojonnier Inc Albert Container
US3157335A (en) * 1962-04-18 1964-11-17 Continental Can Co Plastic cup with spaced and tapered radial hollow projections of 90 degrees or less in the finger contact area thereof
US3167104A (en) * 1960-07-27 1965-01-26 Philip Morris Inc Plastic cigarette container
US3169689A (en) * 1963-05-13 1965-02-16 Traders Leasing Ltd Thin walled container
US3173174A (en) * 1961-05-10 1965-03-16 Illinois Tool Works Molding apparatus for rim structure of thin wall plastic container
US3194468A (en) * 1962-06-11 1965-07-13 Somerville Ind Ltd Plastic drinking cups
US3203611A (en) * 1962-07-10 1965-08-31 Haveg Industries Inc Insulated nestable container and method of making the same
US3220614A (en) * 1964-01-21 1965-11-30 Unit Portions Inc Disposable salt cellar
US3223305A (en) * 1962-12-14 1965-12-14 Illinois Tool Works Plastic cup with fins
US3441173A (en) * 1967-08-09 1969-04-29 Illinois Tool Works Stackable container
US3484018A (en) * 1967-11-28 1969-12-16 Sweetheart Plastics Nestable containers
US3612346A (en) * 1968-03-08 1971-10-12 Jack M Schneider Plastics containers
US3667079A (en) * 1969-09-09 1972-06-06 John Martin Hagglund Device for scraping off and collection of medical refuse and for prevention of its spread
US3810470A (en) * 1971-06-15 1974-05-14 Gunten L Von Nestable pill-administering drinking vessel
US3893567A (en) * 1972-08-16 1975-07-08 Sweetheart Plastics Vertical stacker
US3915330A (en) * 1973-02-26 1975-10-28 Mauser Kg Lid type drum
US4197954A (en) * 1978-10-05 1980-04-15 Ethyl Development Corporation Container
US4566601A (en) * 1984-08-13 1986-01-28 Kuenzig Ernest O Tamperproof container neck construction
US5125512A (en) * 1991-03-15 1992-06-30 Northwestern Bottle Co. Nestable cup with alternative closure structure
US5373961A (en) * 1991-06-04 1994-12-20 21St Century Containers, Ltd. Transportable, self-supporting container
US5657897A (en) * 1995-11-08 1997-08-19 Packerware Corporation Beverage container constructed to accommodate cup holders of different sizes
US5769266A (en) * 1994-01-28 1998-06-23 Berry Sterling Corporation Large drink container to fit vehicle cup holders
US5860557A (en) * 1994-01-14 1999-01-19 Berry Sterling Corporation Large drink container to fit vehicle cup holders
US20040107637A1 (en) * 2001-09-06 2004-06-10 Gebr. Poppelmann Kunststoffwerk-Werkzeugbau Plant Pot made from Deep-Drawn Plastic
US20100200605A1 (en) * 2009-02-12 2010-08-12 Graham Packaging Company, L.P. Blow Molded Plastic Container Assembly With Improved Lid Sealing
US8939312B1 (en) 2014-05-30 2015-01-27 Top-That! Llc Container lid system with a lid portion and food container portion
US9038845B1 (en) 2014-05-02 2015-05-26 Top-That! Llc Container lid with one or more cavities
US9078535B1 (en) 2014-05-09 2015-07-14 Top-That! Llc Container lid with a food compartment and a sip-hole
USD850258S1 (en) * 2016-11-19 2019-06-04 Pavel Savenok Reclosable locking lid assembly

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1800491A (en) * 1926-07-01 1931-04-14 Hector G Zoia Service device
US1908806A (en) * 1931-09-02 1933-05-16 Albert M Allen Kitchen utensil
US1931210A (en) * 1930-07-07 1933-10-17 Steinacher Alfred Edmund Blank for forming milk cans
US2345876A (en) * 1939-07-15 1944-04-04 Kohrtz Gustaf Adolf Fredrik Cup to be used as cap for thermos bottles
US2367799A (en) * 1940-10-19 1945-01-23 Riley Stoker Corp Stoker
US2412178A (en) * 1944-03-08 1946-12-03 Continental Can Co Metal stacking container
US2412325A (en) * 1944-07-21 1946-12-10 James H Devine Receptacle and cover therefor
US2438844A (en) * 1945-06-20 1948-03-30 Wallace W Dale Basket
US2530124A (en) * 1944-05-29 1950-11-14 American Lace Paper Company Nested cup
US2605855A (en) * 1948-12-22 1952-08-05 Hawley Products Co Method of making acoustic diaphragms
US2695423A (en) * 1948-09-25 1954-11-30 Continental Can Co Apparatus for forming containers
US2805790A (en) * 1954-08-24 1957-09-10 Crown Machine And Tool Company Plastic containers and packaging thereof
US2889072A (en) * 1956-03-29 1959-06-02 Sidney D Lapham Nesting and stacking box
US2905350A (en) * 1957-11-29 1959-09-22 Illinois Tool Works Cup for hot beverages
US2942301A (en) * 1957-05-09 1960-06-28 Central Waxed Paper Company Method of making a receptacle of foamed polystyrene

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1800491A (en) * 1926-07-01 1931-04-14 Hector G Zoia Service device
US1931210A (en) * 1930-07-07 1933-10-17 Steinacher Alfred Edmund Blank for forming milk cans
US1908806A (en) * 1931-09-02 1933-05-16 Albert M Allen Kitchen utensil
US2345876A (en) * 1939-07-15 1944-04-04 Kohrtz Gustaf Adolf Fredrik Cup to be used as cap for thermos bottles
US2367799A (en) * 1940-10-19 1945-01-23 Riley Stoker Corp Stoker
US2412178A (en) * 1944-03-08 1946-12-03 Continental Can Co Metal stacking container
US2530124A (en) * 1944-05-29 1950-11-14 American Lace Paper Company Nested cup
US2412325A (en) * 1944-07-21 1946-12-10 James H Devine Receptacle and cover therefor
US2438844A (en) * 1945-06-20 1948-03-30 Wallace W Dale Basket
US2695423A (en) * 1948-09-25 1954-11-30 Continental Can Co Apparatus for forming containers
US2605855A (en) * 1948-12-22 1952-08-05 Hawley Products Co Method of making acoustic diaphragms
US2805790A (en) * 1954-08-24 1957-09-10 Crown Machine And Tool Company Plastic containers and packaging thereof
US2889072A (en) * 1956-03-29 1959-06-02 Sidney D Lapham Nesting and stacking box
US2942301A (en) * 1957-05-09 1960-06-28 Central Waxed Paper Company Method of making a receptacle of foamed polystyrene
US2905350A (en) * 1957-11-29 1959-09-22 Illinois Tool Works Cup for hot beverages

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126139A (en) * 1964-03-24 Partially insulated plastic container
US3123273A (en) * 1964-03-03 Cup for hot beverages
US3142422A (en) * 1959-08-10 1964-07-28 Mojonnier Inc Albert Container
US3167104A (en) * 1960-07-27 1965-01-26 Philip Morris Inc Plastic cigarette container
US3173174A (en) * 1961-05-10 1965-03-16 Illinois Tool Works Molding apparatus for rim structure of thin wall plastic container
US3157335A (en) * 1962-04-18 1964-11-17 Continental Can Co Plastic cup with spaced and tapered radial hollow projections of 90 degrees or less in the finger contact area thereof
US3194468A (en) * 1962-06-11 1965-07-13 Somerville Ind Ltd Plastic drinking cups
US3203611A (en) * 1962-07-10 1965-08-31 Haveg Industries Inc Insulated nestable container and method of making the same
US3223305A (en) * 1962-12-14 1965-12-14 Illinois Tool Works Plastic cup with fins
US3169689A (en) * 1963-05-13 1965-02-16 Traders Leasing Ltd Thin walled container
US3220614A (en) * 1964-01-21 1965-11-30 Unit Portions Inc Disposable salt cellar
US3441173A (en) * 1967-08-09 1969-04-29 Illinois Tool Works Stackable container
US3484018A (en) * 1967-11-28 1969-12-16 Sweetheart Plastics Nestable containers
US3612346A (en) * 1968-03-08 1971-10-12 Jack M Schneider Plastics containers
US3667079A (en) * 1969-09-09 1972-06-06 John Martin Hagglund Device for scraping off and collection of medical refuse and for prevention of its spread
US3810470A (en) * 1971-06-15 1974-05-14 Gunten L Von Nestable pill-administering drinking vessel
US3893567A (en) * 1972-08-16 1975-07-08 Sweetheart Plastics Vertical stacker
US3915330A (en) * 1973-02-26 1975-10-28 Mauser Kg Lid type drum
US4197954A (en) * 1978-10-05 1980-04-15 Ethyl Development Corporation Container
US4566601A (en) * 1984-08-13 1986-01-28 Kuenzig Ernest O Tamperproof container neck construction
US5125512A (en) * 1991-03-15 1992-06-30 Northwestern Bottle Co. Nestable cup with alternative closure structure
US5373961A (en) * 1991-06-04 1994-12-20 21St Century Containers, Ltd. Transportable, self-supporting container
US5860557A (en) * 1994-01-14 1999-01-19 Berry Sterling Corporation Large drink container to fit vehicle cup holders
US5769266A (en) * 1994-01-28 1998-06-23 Berry Sterling Corporation Large drink container to fit vehicle cup holders
US5657897A (en) * 1995-11-08 1997-08-19 Packerware Corporation Beverage container constructed to accommodate cup holders of different sizes
US20040107637A1 (en) * 2001-09-06 2004-06-10 Gebr. Poppelmann Kunststoffwerk-Werkzeugbau Plant Pot made from Deep-Drawn Plastic
US7204056B2 (en) * 2001-09-06 2007-04-17 Poeppelmann Holding Gmbh & Co., Kg Plant pot made from deep-drawn plastic
US20100200605A1 (en) * 2009-02-12 2010-08-12 Graham Packaging Company, L.P. Blow Molded Plastic Container Assembly With Improved Lid Sealing
US9038845B1 (en) 2014-05-02 2015-05-26 Top-That! Llc Container lid with one or more cavities
US9078535B1 (en) 2014-05-09 2015-07-14 Top-That! Llc Container lid with a food compartment and a sip-hole
US8939312B1 (en) 2014-05-30 2015-01-27 Top-That! Llc Container lid system with a lid portion and food container portion
USD850258S1 (en) * 2016-11-19 2019-06-04 Pavel Savenok Reclosable locking lid assembly

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