US2540565A - Double-wall paper container - Google Patents

Description

Feb. 6, 1951 c. BARBIERI DOUBLE-WALL PAPER CONTAINER Original Filed March 17, 1944 Came: gage/Eel MW. w

Patented Feb. 6, 1951 DOUBLE-WALL PAPER CONTAINER Cesare Barbieri, New York, N. -Y., assignor-to- Dixie Cup Company, Chicago, 111., a corporation of Delaware Original application March 17,1941, Serial No.

526,874. Divided and this application February-27,1947, SeriaiNo.731,222

-. invention relates to improvements in a double-wall paper container of the generalcharacter of a fiat bottomcdypaperdrinking cup,'.the'

3 cl m ,(01. 229-55;

' In the manufacture of a paper container,

economy is an essential, both as to the amount of material used and the manner in which the mateinvention being highly desirable for use in conr nection-with' the serving or carryingof hot or cold liquid or substances, such forexample as coiiee, icecream, cottagecheese, etc., although the invention will have'other uses and purposes as will be apparent to one skllledin the art.

This application application entitled 1944, Serial .No. 526,874, issued in Letters Patent No. 2,416,813, March 4, 1947.

More particularly, the invention relates to a container having a, multi-thickness wall and a bottom construction that adds strength to the container so as to enable the carrying of hot or cold substances for a. comparatively long time without material weakening oi. the container and without objectionable or unexpected change in the temperature of the substance carried, even though the container may be left standing upon a table with the full weight of the contents on the bottom of the container.

In the past, many and various types of containers for hot or cold substances have been developed, but in the main such containers have proved objectionable in that if the substance were left in the container, especially a hot substance, for a considerable length of time objectionable weakening of the container occurred so that it was difficult to ultimately consume the contents directly from the container when desired. In many instances this weakening occurred adjacent the bottom of the container enhancing the possibillty of leakage through the bottom of the container and in some cases rendering the wall adjacent the container bottom somewhat flabby.

With that in mind, it is an important object of the instant invention to provide a container in the nature of a flat bottom paper cup of substantially truncated conical shape, having a multithickness wall, and a special bottom construction of a materially stronger characterthan containers of this type heretofore known.

Another object of the invention is the provision of a container having a multl-thickness wall and a, multi-thickness bottom.

It is also an object of this invention to provide a flat bottom paper container having a multithickness wall and incorporating a flanged bottom member, with the lower margin of the multithickness wall turned around the flange oi the bottom member to give added strength to the container.

is a division of my copending' Container, filed March 17,

rial isformed into a container. Accordingly, it is an object of the instant invention to. provide a composite blank for a multi-thickness container which; blank may be made up of initially separate pieces,-eachtoo-small-toprovidethe same type of container'body of single thickness, and the'composite blank may be formed into container shape on the same typ-e'of'machines'that are now in I use for forming single-walled containers.

A further objectof the invention resides in the provision of a composite blank for forming a double-walled container body, which blank is made up of initially separate pieces secured together in face-to-face relationship and so disposed relatively to each other as to provide a heavy double bottom margin while permitting the rolling of a rim bead around the mouth end of the container from single thickness stock.

While some of the more salient features, characteristics and advantages of the instant invention have been above pointed out, others will become apparent from the following disclosures, taken in conjunction with the accompanying drawings, in which- Figure 1 is a side elevational view of a congainer embodying principles of the instant inven- Figure 2 is a front view of a composite blank from which the container of Fig. 1 might be made, also embodying the principles of this invention, and illustrated with the parts broken away to better show structure therebeneath;

Figure 3 is an enlarged fragmentary projectional view shown in vertical section of the lower portion of the container of Fi :1; and

Figure 4 is a fragmentary vertical""sectional view of the same form of container, utilizing the same composite body blank, but illustrating the use of a double thickness bottom.

As shown on the drawings:

In that illustrated embodiment of this invention seen in Figs. 1, 2 and 3, there is shown a truncated conical paper container generally indicated by numeral I (Fig. 1). This container has a rim head 2 formed on the mouth which not only reinforces that end of the container, but also renders it easy to drink from the container if so desired. Below the rim head there is another externalcircumscribing head 3 which provides a groove on the inside of the container for the reception of a cap or cover pressed into the open end of the container to seal in the contents until it is desired to remove them.

The body portion of the container I is of double thickness, and this body portion is made from a composite blank seen more clearly in Fig. 2. The composite blank comprises two initially separate pieces 4 and 5 which are secured together in faceto-face relationship by adhesive 5 disposed therebetween or equivalent means. Preferably, the pieces 4 and 5 are undersized to the extent that neither of these pieces is of sufilcient size to form a similar container having a single thickness wall, but by arranging the pieces substantially in echelon as seen in Fig. 2, the composite blank is of sufllcient overall size to provide a container having a double thickness wall.

The pieces are preferably so relatively arranged that their bottom edges are flush or coincidental as indicated at I, and the pieces are of substantially the same lateral width and laterally offset with respect to each other so that on one side a marginal portion 8 of the piece 4 projects beyond the piece 5, and at the other side a marginal portion 9 of the piece 5 projects beyond the piece I. It will also be noted that the piece 5 is higher than the piece 4 and accordingly projects thereabove to the extent of a marginal portion III which is ultimately rolled into the aforesaid rim bead 2. In manufacture, it is much more feasible to roll a rim bead from single thickness stock than to utilize double thickness stock, and the bead when rolled from the margin In is of ample strength.

The composite blank may be shaped into thecup body by means of known cup forming machinery of the same character that handles single piece blanks. The composite blank is treated as though it were merely a single thickness blank. When rolled into cup body formation, the piece 4 will be the external piece and the piece 5 will be the internal piece. Two diiferent joints in the cup wall may be provided, either a lapped joint or a butt joint. If a lap joint is provided a stripe of adhesive H is preferably applied along a marginal portion of the inner piece 5 to secure overlapping parts together and provide a side seam in the finish container wall. It is deemed preferable, however, to provide a butt joint or seam because the blank pieces may be of less size with such a joint and thus results in a further saving of paper. In that event, the stripe of adhesive i l is omitted and the adhesive applied on the inner face of the piece I may be relied upon to secure the pieces together. In that event, the margin 8 will overlap the margin 9 so that the side edges of each stock. One of these pieces may be a diflerent color than the other, and the outside piece may be decorated in any desirable manner as by printing or other decorative embellishment.

Where a still stronger bottom construction is desired, a double thickness bottom may be employed as illustrated in Fig. 4. In this instance, there are two bottom members It and I! each having a depending flange, and the bottom member I1 is nested within the bottom member ii. The double thickness lower margin of the composite blank is then rolled around both flanges of the two bottom members and secured to the flanges by means of the adhesive ll. With this construction, it is not necessary to glue or otherwise secure the two bottom members It and I! together, but obviously they may be so secured together if desired.

From the foregoing, it is apparent that I have provided a novel paper container having a multithickness wall made from a composite blank that eifects a decided saving in paper. The container may be constructed on any suitable machinery of the character used in making single thickness paper containers and the actual forming operations are just as economical as though a single thickness paper container were being made. It will be further noted that the container set forth herein has an exceptionally strong and substantial bottom construction affording a solid base for the seating of the container, especially it hot or cold substances are to be maintained in the container for a considerable length of time.

That bottom construction may be further strengthened by the utilization of a double thickness bottom if so desired.

It will, of course, be understood that various details of construction may be varied through a wide range without departing from the principles of this invention and it is, therefore, not the purpose to limit the patent granted hereon otherpiece are in abutment with each other, thus leaving the seam only of double thickness the same as the rest of the container wall.

Obviously, only a single winding of the composite blank is necessary to form the body portion of the container. The blank is rolled around a bottom member l2 (Fig. 3) having a depending flange It. A stripe of adhesive 14 is provided along the lower margin of the composite blank and then this double thickness lower margin is rolled around the depending flange it of the -'bottom member as indicated at IS in Fig. 3, the

adhesive l4 securing the double margin to the flange iii. In this manner, an exceptionally strong bottom construction for the container. is provided.

From the showing in Fig. 3 it will be noted that the two blank pieces need not be of the same thickness not need they be or the same paper wise than necessitated by the scope of the appended claims.

I claim as my invention:

1. A fiat-bottom paper cup having a doubleply wall, including a flanged bottom member, and a 'body part comprising a composite blank made up of a pair of initially separate pieces secured together before forming and coinciding at the lower edges with a side margin of one extending beyond the other and the opposite side and upper margins of the other extending beyond the first, the lower margins of both pieces being turned into a bottom fold around the flange on the bottom member.

2. A composite blank for forming a flat bottom conlcally shaped paper cup having a double ply wall, comprising a pair of initially separate pieces secured together in overlapped relationship, each of said pieces having arcuate top and bottom edges and side edges converging toward said bottom edges, said pieces being of substantially equal width and being positioned in said overlapped relationship with their bottom edges coinciding so as to present a composite blank having a single-thickness margin along all but the bottom edge thereof, and said blank being roliable into a cup in the same manner and by the same means as a single-piece blank.

3. A composite blank for forming a paper container having a double-ply wall, comprising a pair of initially separate pieces each of which is shorter than required for a single wall container of the same size and one of which is higher "than the other, each of said pieces having an 5 arcuate top edge and arcuate bottom edge with side edges converging toward said bottom edge, said pieces being of substantially equal width and being secured together face to face with the bottom edges thereof flush with each other and with g the lateral converging edges in echelon relationship, leaving a single thickness margin at the top and converging edges of the composite blank, and said blank being rollable intoa cup in the same manner and by the same means as a singlepiece blank.

CEBARE BARBIERI.

REFERENCES CITED The following references are of record in the file of this patent:

6 UNITED STATES m'rnm'rs Number Name Date Avery Oct. 29, 1867 Bower Oct. 5, 1880 Brandt July 15, 1913 Reynolds Nov. 13, 1923 Benson Dec. 31, 1929' Fox July 24, 1934 Barbieri Aug. 3, 1937 Barbieri Aug. 12, 1941 Graves et a1 Mar. 23, 1943 O'Neil et al. Oct. 5, 1943

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