US1675652A - Method of making containers for cakes, etc. - Google Patents

Description

July 3, 1928.

G. W. GWINN llETfiOD OF MAKING CONTAINERS FOR CAKES, ETC

Filed May 1927 W vsmpn ATTORNEY Patented July 3, 1928 unrrr: srrE-s IRA-TENT OFFICE.

GEORGE WILIBUR GWINN, or HEWLETT, NEW-,YORK, ASSIGNOR iro AMERiCAN MACHINE & FOUNDRY COMPANY, A CORPORATION or NEW JERSEY.

mnrnon OFJIIAKING mea times; FOR cams, are.

' 7 A plicant filed ma This invention relates tofan im roved method of making containers for ca es or similar soft food products, its main object being to provide a hermetically sealed con- 5 tainer for soft articles which cannot be handled or subjected to pressure while being wrapped. Such containers heretofore"have been made with an insertedilange "towhich the .cover is sealed, andiwith a body having a series of overlaps or lpl'eats morefor less haphazard in arrangement. The present improvement controls the n ul'nber andshape ofsuchpleats, so that tlie paclmge can be made geometrically s'ynnnetrical'and uniform and will present a better appearance.

This is accomplishedby providing the shaping dies with slots in a suitable arrangement to guide the wrapper when being formed into shape to rec'eivethecake. [By varying the arrangement of slots and"th e'lrind of relative n'iotion'between the top and bottom dies, any number and shape of overlaps or pleats within the limits of the container may be formed. Thus,'by using a slotted bottom die, a vertically sliding top die,'and a system of hinged pressure'fingersf surrounding both dies when forced together,

a box-pleated container of the desired shape and with the desired number'of'pleats can 50 be produced. Or, by using dies of special shape, the lower portion of the side walls of the container may be made in corrugated form, while the top portions are box-pleated. In square, rectangular or polygonal containers, the pleats are of course placed at the corners. For circular. oval or heartshaped and other curved forms, the number, shape and disposition of the pleats is arranged to best suit the general appearance of the container.

The cover may be laid on and sealed after the flange is made, or it may be attached to the flange during formation of the latter. In the latter case, the article to be wrapped must of course be inserted in the container directly after forming its body portion; but the cover, being sealed by the same formation that produces the flange, can then also be made with box-pleats corresponding to those of the container.

The side walls of the container may be made sloping, so that a number of containers may be nested together if desired.

In the accompanying drawings, in which like characters of reference indicate the same 19 2?." Serial No.. 1:88,087.

or like parts, Figs. 1 and 1" to 4 and 4 illustratessuccessive stages in producing a box-pleated containerwith asealing flange;

5fand' "5" illustratea rectangular container with box-pleats at the corners; Fig. 6 shows thesame container after its'flange hasbeeeninverted; Fig. 7 shows a circular or oval container with box-pleats; Fig. 8 shows a 'box-pleated'j circular or 'oval container withits flange inverted and its cover sealed; and Fig.':9"shows a circularor oval 'container'with the cover in process of being sealed, the'lower' portion of the side walls in this case being corrugated, While the upper portion is box-pleated.

Referring to Fig. 1, which is a top view, and Fig. 1 which is a sectional sideelevation, 10. indicates a sheetof wrapping ma.-

terinl'of the propershape whichis to be made into a container. It is placed upon thebottom die 1 1, provided with slots 12, and is'then forced downwardly by the top die 13. As the die 13 sinks into the 'die 11, or either, in this or reversed position, is inoved towards the other, thereby forming the cup-like depression by folding up the edges of the wrapper, the surplus material emerges from the slots 12 and forms the ,loops' 'l lshown 'in Figs. 2' and 2. When the top die has been completely compressed,

' the hinged Fingers 15 are closed-around the bottom die, thereby flattening out theloops and forming the box-pleats 16, as shown in Figs. 3 and 3 The top edge of the container thus formed is then turned outwardly as by the cover die 17, shown in Figs. 4 and 4*, thereby forming the sealing flange 18.

After the article has placed in the container, and while the latter is still held in the bottom die 11, a cover sheet of the proper shape is pressed on to the flange 18', as by a suitable die, either before or after the flange has been inverted or turned down parallel with the sides of the container. When the cover is applied to the sealing flange, while the latter is in the horizontal position shown in Figs. 4 and 4, the cover and flange are simultaneously turned downwardly, and the flange turning die may be so arranged that the cover is box-pleated around the box pleats of the flange, thereby producing an interlocked seal which is held in place by applying paste to one of the joined surfaces; or, in case of waxed paper, by subsequent heating of the joint.

In Figs. 5 and. 5" are shown respectively the top view and side elevation of -a rectangular container 19, produced by the method shown in Figs. 1 and I to 4- and 4:, the boxpleats 16 in this case being located at the corners and folded equally over the two adjoining sides of the box. When inverting the flange 18, the pleats are neatly folded under, giving to the box the form shown in Fig- 6.

Fig. 7 shows a circular or oval container made by the improved method, the box plea-ts 16 being symmetrically arranged around the curved surface. In Fig. 8, the same container 20 is shown sealed by a cover 2 the box pleats of the latter interlocking with those of the former.

In Fig. 9, a. container 22 with a cover 23 is shown, the dies for forming the same being made of such form as to produce the corrugations 24: along a portion of its height, and the box-pleats 25 along the remainder. The cover 23, which is shown partly inverted, has the corrugations 26 arranged to match the box-pleats 25 and covering the latter when completely turned down and folded on the flange 18 of the container 22. The container 22 is made with slightly sloping side walls suitable for nesting.

According to the shape of the dies and to the number and arrangement of the slots, containers of many shapes and with many arrangements of box-pleats-with or without corrugationsn'iay be produced by this method.

What is claimed is:

1. The method of making a package, which consists in folding a sheet of paper to form a container bottom having an upstanding wall provided with a series of out-standing loops. then forming said loops into boxpleats on said wall, then folding the upper part of said wall outwardly to form a flange, then filling the container so formed, then attaching a. cover to said flange, and then folding said cover and flange down together on said wall.

2. The series of steps in a method of making a package, which consists in folding a. sheet of paper to form a container bottom having an upstanding wall provided with a series of outstanding loops, then forming said loops into box-pleats on said wall, then folding the upper part of said wall outwardly to form a flange, then filling the container so formed and then attaching a cover to said flange.

3. The series of steps in a method of making a container, which consists in folding a sheet of paper to form a container bottom having an upstanding wall provided with a series of outstanding loops, then forming said loops into box-pleats on said wall, and then folding the upper partof said wall outwardly to form a flange.

4. The series of steps in a method of making a container, which consists in folding a sheet of paper to form a container bottom having an upstanding wall provided with a series of outstanding loops, and then forming said loops into box-pleats on, said wall.

5. The method of making a container, which consists in folding a sheet of paper to form a container bottom having an upstand' ing wall provided with a series of outstanding loops, then forming said loops into boxpleats on said wall, and then doubling the upper part of said wall back on itself.

In testimony whereof, I have signed my name to this specification.

GEORGE VILBUR GYVINN.

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