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Publication numberUS3137431 A
Publication typeGrant
Publication dateJun 16, 1964
Filing dateNov 19, 1962
Priority dateNov 19, 1962
Publication numberUS 3137431 A, US 3137431A, US-A-3137431, US3137431 A, US3137431A
InventorsErnest Spaulding Harold, Myron Crouse Earl
Original AssigneeAmerican Can Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Blank for making fibre container
US 3137431 A
Abstract  available in
Images(1)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

June 16, 1964 E. M. cRoUsE ETAL 3,137,431

yBLANK FOR MAKING FIBRE CONTAINER Filed Nov. 19, 1962 3 137 431 BLANK FoR MAKING FIBRE CONTAINER Earl Myron Crouse and Harold Ernest Spaulding, Palmer Township, Easton, Pa., assignors to American Can Company, New York, N.Y., a corporation of New Jersey Filed Nov. 19, 1962, Ser. No. 238,609 7 Claims. (Cl. 229-15) This invention relates to a disposable, tapered, nestable container whose body is formed from a single libre blank, and has particular reference to such a container whose transverse cross-section is substantially rectangular.

In the past, many and various types of conical nestable containers have been developed; but one objection to such containers is that considerable space is taken up by the container in both storage and shipping, due to its transverse circular configuration. The preference for circular or conical shaped containers has been principally due to their amenability to high-speed forming methods, whereas tapered, nestable, libre containers with rectangular crosssections have not lent themselves to such high-speed production techniques.

The present invention has overcome these production diiiiculties, while still retaining a simplicity in construction comparable to the conventional truncated conical fibre container.

An object of the present invention is to provide a disposable, tapered, nestable, libre container having a substantially rectangular transverse cross-section.Y

Another object is to provide a blank for forming a tapered, nestable, libre container body having a polygonal transverse cross-section.

An additional object is to provide a fibre blank which, upon being formed into a tapered, nestable container body, results in the body having the shape of a truncated substantially rectangular pyramid.

A still further object is to provide such a container having a longer perimeter at the top than at the bottom and provided with a brim at the top.

Yet a further object is to provide a rectangular, nestable container wherein the container brim lies in a substantially single plane.

A further object is to provide such a container which is amenable to high-speed container forming operations.

Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description, which, taken in connection with the accompanying drawings, discloses a preferred embodiment thereof.

The above objects are accomplished by providing a libre sheet or blank havingside edges and a leading and trailing edge extending between the side edges. The side edges are substantially straight and converging toward the trailing edge. Thus the trailing edge is shorter than the leading edge. Both the leading and trailing edges have a plurality of alternating straight lines and arcs, the opposite lines being parallel and the opposite arcs being concentric.

A container body formed from this blank has articulated walls and a side seam between two articulations, the articulations being arcuate. Each of the walls is straight and tapered inwardly toward the bottom; and the bottom end is closed by means of an end closure secured to the body. The opposite end of the container is ICC open and has a perimeter longer than the perimeter at'the bottom end.

Referring to the drawings:

FIG. 1 is a plan view of a body blank embodying the principles of this invention;

FIG. 2 is a perspective view of the container made from the body blank shown in FIG. l;

FIG. 3 is a sectional view taken substantially along line` 3 3 of FIG. 2;

FIG. 4 is an enlarged fragmentary sectional view taken substantially along line 4 4 of FIG. 2; and

FIG. 5 is an enlarged fragmentary sectional view taken substantially along line S--S of FIG. 2.

As a preferred or exemplary embodiment of the instant invention, FIG. l shows a fibre blank,l generally designated 10, having side edges 12 and 14, which are substantially straight. lBoth side edges 12 and 14 intersect a leading edge 16 and a trailing edge 18. The leading edge 16 is longer than the trailing edge 18. Thus the side edges 12 and 14 converge lfrom the leading edge 16 to the trailing edge 18.

Each of the leading and trailing edges have a plurality of alternating straight lines '20, 21 and arcs 22, 23. The lines 20 in the leading edge 16 and the lines 21 in the trailing edge 18 are parallel to each other, while the opposite arcs 22 and 23 on the leading edge 16 and the trailing edge 18 respectively are concentric. These alternate straight lines and arcs allow formation of a tapered container body wherein both the top and bottom ends lie in two substantially parallel planes, which will be more fully described hereinafter.

A corner 24 is cut from the leading edge 16 in orderr to allow the formation of a top bead in the finished container without an uneven edge.

Spaced from and adjacent to the trailing edge 18 is a` long score line 26 which comprises a plurality of alternate;

straight lines 28 and arcs 30. These are respectively parallel and concentric to their opposite lines 21 and arcs 23 in the trailing edge 18 and deiine a band 31. In addition, a plurality of short score lines 32 intersect each arc 23 and terminate at the arc 30 of the score line 26. Each of these short score lines 32 is substantially normal tothat' portion of the edge 18 and the score line 26 with which they intersect. These scored lines facilitate bending and formation of a container from theblank 10, which will'be explained more fully hereinafter. i l

FIGS. 2, 3, 4 and 5 show a disposable tapered con-l tainer, generally designated 34, Whose body 36 is formed from the blank 10. The container 34 comprises a tapered, substantially rectangular body 36 having a side seam 38 which is adhesively sealed. The body 36 itself has a plurality of straight articulated walls 40 which are substantially at and tapered toward the bottom of the container. body 36. Each of the articulations 42 joining the walls 40 are arcuate in shape. The radius of the articulations 42 may be either smaller or larger than that shown with. out departing from the scope of the invention.

amasar At the upper end of the body wall 49 Vimmediately below the bead 52 is a substantially straight flared segment 54. This segment 54 results from formation of the bead 52. As the bead 52 is formed, the open end of the tapered cup 34 slides into engagement with the forming tool. Since the internal cross-section of the cup 34 decreases from top to bottom, the tool tends to flare the upper end of the body as the bead 52 is curled. This tlare may be eliminated, if desired, by an appropriate change in the body forming apparatus.

The interior surface of the container 34 is coated with a covering 55. The exterior surface of the walls 46 and articulations 42 are also coated with a covering 56. Preferably both interior and exterior coverings S and 56 are inert and impermeable to both hot and cold comestibles, although it can be readily understood that the inertness and impermeability of the covering is more important on the interior, being in direct contact with the containers contents, than the exterior of the container 34. Examples of such coverings are thin metals such as metal foil or vapor deposited metal; cellulosic liners such as glassine, parchment, cellophane, etc.; resinous coatings applied either as a film, such as polyethylene, polypropylene, polystyrene, etc., or as a hardenable liquid, such as cured epoxy resin, vinyl solution, etc.; and flexible ceramic coatings. Because of their chemical resistance, low cost, and ease of application, the preferred coatings are polymers of ethylenically unsaturated monomers such as polyethylene, polypropylene, polystyrene, etc.

The coverings 55 and 56 may be applied at a lamination to the fibre sheet stock, prior to the fabrication of the container, or may be applied to the ccntainer surfaces after it is fabricated. In the preferred embodiment of the invention, the coverings 5S and 56 are lms of polyethylene laminated to the fibre sheet stock from which the blank and bottom 44 are made. A polyethylene film thickness of one-half to three mils is suitable, with a preferred thickness of three-quarters to one mil. The polyethylene also acts as the adhesive for sealing the side seam 3S and end seam 5t) by the application of heat and pressure.

In manufacturing the container 34 from the blank 10 and the bottom 44 any of several means of known cupforming machinery that handle single piece blanks may be used. In forming the body 36 the blank 10 may be wrapped around a mandrel having the general shape of the finished cup body 36. Thereafter the side seam 38 is sealed by suitable means such as the application of heat. Then the bottom 44 is affixed to the lower end of the body 36. In the past when conical containers or cups were made there was complete symmetry around the periphery of the bottom. In the present design, due to the substantially rectangular shape of the container 34, such is not true. This introduces certain problems inrclosing one end of the body which are not present in conical containers.

In attaching the bottom 44 to the body 36 the skirt 48 surrounding the bottom panel 46 is positioned in the lower opening of the body 36 so that the straight score lines 28 coincide with the straight sections of the bottom panel 46 while the scored arcs 30 abut the arcuate corners of the panel 46. Then the band 31 along the trailing edge 18, of what is now the body 3d, is folded over the skirt 48 and sealed thereto by means such as heat sealing or by gluing if the thermoplastic coverings 5S and 56 are not utilized.

While securing the bottom 44 to the body 36 the short score lines 32 allow the band 31 to conform to the arcuate shape of articulations 42 in the body 36. There is thus no gathering of the band 31 fibre as the band conforms to and adheres to the curved portions of the 'skirt 48.

When the top peripheral bead 52 is made, after the body 36 is formed, it is naturally important that the bead 52 should lie in substantially a single plane. After forming the body 36 from the blank 10 and securing the bottom 44 to the lower end of the body, the bead S2 is curled in the top of the container. This top edge was the leading edge 16 in the blank 10, and comprises the alternate straight lines 20 and arcs ZZ. The straight lines 29 Vform the tops of the walls 40, while the arcs 22 form the tops of the arcuate articulations 42. The arcs 22 greatly facilitate the rolling of the upper end of the body 36 into the` bead 52, and insure its uniformity; and also insure the uniplanar disposition of the brim 53.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

We claim:

l. A blank for a nestable container, polygonal in transverse cross-section comprising: a fibre sheet having side edges and a leading and trailing edge extending between said side edges; said side edges being substantially straight and converging. toward said trailing edge, whereby said trailing edge is shorter than said leading edge; each of said leading and trailing edges having a plurality of alternating straight lines and arcs, said straight lines being parallel and opposite, and'said arcs being concentric and opposite, said leading edge adapted to be curled to form a peripheral bead surrounding the mouth of the container and the said trailing edge adapted to to be turned inwardly to secur a bottom to said container.

2. The blank as set forth in claim l wherein at least one side of said sheet is coated with a polymer of an ethylenically unsaturated monomer.

3. A blank for a nestable container, polygonal in transverse cross-section comprising: a fibre sheet having side edges and a leading and trailing edge extending between said side edges; said side edges being substantially straight and converging toward said trailing edge, whereby said trailing edge is shorter than said leading edge; each of said leading and trailing edges having a plurality of alternating straight lines and arcs, said straight lines being parallel and opposite, and said arcs being concentric and opposite; and a score line adjacent said trailing edge and spaced therefrom, whereby in the finishedl container said leading edge is curled to form a peripheral bead surrounding the mouth of the container and the said trailing edge is turned inwardly to secure a bottom to said container.

4. The blank as set forth in claim `3 wherein said score line along its entire length is equally spaced from said trailing edge.

5. A blank for a nestable container, polygonal in trans- Y verse cross-section comprising: a libre sheet having side edges and a leading and trailing edge extending between said side edges; said side edges being substantially straight and converging toward said trailing edge, whereby said trailing edge is shorter than said leading edge; each of said leading and trailing edges having a plurality of alternating straight lines and arcs, said straight lines being parallel and opposite, and said arcs being concentric and opposite; a long score line adjacent said trailing edge and spaced therefrom; and a plurality of short score lines extending from said long score line to the arcs in said trailing edge, whereby in the finished container said leading edge is curled to form a peripheral bead surrounding the mouth of the container and the saidV trailing edge is turned inwardly to secure a bottom to said container.

6. The blank set forth in claim l having additionally a plurality of score lines extending from each arc in said trailing edge a short distance toward said leading edge.

7. A blank for a nesta'ole container, polygonal in transverse cross-section, comprising: a bre sheet having side edges and a leading and traiiing edge extending between said side edges; said side edges being substantially straight and converging toward said trailing edge, whereby said trailing edge is shorter than said leading edge; and each of said leading and trailing edges havinga plurality of alternating substantially opposed straight lines and arcs,

UNITED STATES PATENTS Y Ben Dec. 7, 1943 Hin oct. 23, 1956 Amberg Dec. 17, 1957 Gallagher Sept. 23, 1958 FOREIGN PATENTS Francel Feb. 7, 1906

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2336158 *Apr 4, 1942Dec 7, 1943Bell John GContainer
US2767755 *Aug 6, 1953Oct 23, 1956Crown Cork & Seal CoContainer
US2816697 *Jul 20, 1954Dec 17, 1957Lily Tulip Cup CorpPaper containers
US2853222 *Apr 20, 1953Sep 23, 1958John P GallagherInsulated foil lined paper cup
FR359928A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3949927 *Mar 21, 1975Apr 13, 1976Phillips Petroleum CompanyImpact resistant container bottom structure
US4117971 *Nov 7, 1977Oct 3, 1978Onoda Cement Company, Ltd.Paper cups
US4130234 *Dec 27, 1977Dec 19, 1978Maschinenfabrik Rissen GmbhCombined throwaway container of cardboard and plastic material with a rigidly flanged aperture rim or lip
US4261502 *Aug 20, 1979Apr 14, 1981Honshu Paper CompanyLiquid container sealing construction
US4420111 *Jul 27, 1982Dec 13, 1983Erwin HamentCup and cover combination
US4472440 *Aug 8, 1983Sep 18, 1984Maryland Cup CorporationPackage containing a moisture resistant edible baked container
US4505423 *Nov 12, 1982Mar 19, 1985International Paper CompanyNon-round liquid-tight paper board container
US4715527 *Sep 11, 1986Dec 29, 1987Toppan Printing Co., Ltd.Ultrasonically sealed side seam on cup
US5085366 *Jun 27, 1991Feb 4, 1992Sweetheart Cup CompanyHigh gloss paper cup
US5476213 *Jun 2, 1995Dec 19, 1995Sonoco Products CompanyContainer having abuse resistant end seal
US5544808 *May 18, 1994Aug 13, 1996James River Corporation Of VirginiaPreconditioned paperboard containers
US5622308 *Apr 28, 1995Apr 22, 1997Toyo Ink Manufacturing Co., Ltd.Paper container for fluid substances, and inside lid therefor
US5967405 *Sep 18, 1998Oct 19, 1999Hanauska; Kenneth A.Megaphone cup
US6116503 *Jul 24, 1998Sep 12, 2000Varano; Richard F.Disposable all-purpose container assembly
US6364201Sep 11, 2000Apr 2, 2002Richard F. VaranoDisposable all-purpose container assembly
US6662996 *Feb 1, 2002Dec 16, 2003Georgia-Pacific CorporationCup and method for making cup with integrally formed u-shaped bottom channel
US7984842Jul 26, 2011Richie Jon AMegaphone popcorn cup
US20030146273 *Feb 1, 2002Aug 7, 2003Hartjes Timothy P.Cup and method for making cup with integrally formed u-shaped bottom channel
US20050035187 *Aug 14, 2003Feb 17, 2005Sonoco Development, Inc.Multilayer single wrap container and method and blank therefor
US20060289609 *Aug 2, 2005Dec 28, 2006Paper Machinery CorporationPolymeric container
US20080185424 *Feb 1, 2008Aug 7, 2008Richie Jon AMegaphone popcorn cup
DE3838600A1 *Nov 15, 1988May 17, 1990Hoerauf Michael MaschfBehaelter
DE3838600C2 *Nov 15, 1988May 31, 2001Hoerauf Michael MaschfBehälter
Classifications
U.S. Classification229/400, D07/509, 229/4.5
International ClassificationB65D3/02, B65D3/14, B65D3/22, B65D3/00
Cooperative ClassificationB65D3/14, B65D3/22, B65D3/02
European ClassificationB65D3/14, B65D3/22, B65D3/02