Receptacle

2,070,747

Feb. 16, 1937.

G. ORSTROM

RECEPTACLE

Filed Jan. 26,

1934

Sheets-Sheet 1

FIG. /

<img file="US2070747A_D0001.tif" />

FIG. 3

<img file="US2070747A_D0002.tif" />

<img file="US2070747A_D0003.tif" />

<img file="US2070747A_D0004.tif" />

2,070,747

Feb. 16, 1937.

G. ORSTROM

RECEPTACLE

Filed Jan. 26, 1934

Sheets-Sheet 2

FIG. 6

FIG. 4

<img file="US2070747A_D0005.tif" />

Patented Feb. 16, 1937

2,070,747

UNITED STATES PATENT OFFICE

2,070,7« RECEPTACLE

Gustaf Orstrom, Alsten, Sweden, assignor to Aktieboiaget Gerh. Arehns Mekaniska Verkstad, Stockholm, Sweden, a corporation of Sweden

Application January 26,1934, Serial No. 708,481 In Sweden February 2,1933

Claims. (Cl. 229—37)

This invention relates to an improved receptacle and method of manufacturing same.

One object of my invention is to provide a receptacle particularly a paper receptacle for liquid which is particularly inexpensive in construction yet strong, tight and durable.

Another object of my invention is to provide a receptacle of the indicated character to the end that the receptacle will be reinforced and hermetically sealed at the bottom which will be very smooth.

A further object of my invention is to provide a receptacle being made of a rectangular folded blank to the end of obtaining an hermetically sealed bottom which is strong and durable and able to withstand, for instance, the shocks ordinarily received by a liquid bottle as well as internal liquid pressure.

Still a further object of my invention is to provide an inexpensive prismatic receptacle being particularly well adapted for storage and having an hermetically sealed bottom which is very resistant against shocks or the like.

Still a further object of my invention is the provision of an inexpensive rounded receptacle and method for making same to the end of manufacturing rounded receptacles of a single paper blank which have a hermetically sealed bottom which is very strong and durable and permits the receptacle to stand steady upon surfaces of practically any kind.

Still a further object of my invention is the provision of a receptacle and method of making same which possesses advantages in points of simplicity and efficiency, and, at the same time proves itself comparatively inexpensive in cost of manufacture.

In the accompanying drawings forming part of this specification and wherein similar reference characters refer to similar parts throughout the several views,

Fig. 1 is a perspective view of the partly sealed bottom of the receptacle;

Fig. 2 is a perspective view of the sealed and finished bottom of the receptacle;

Fig. 3 is an elevational section of the bottom end of the receptacle;

Fig. 4 illustrates a modified form of the partly sealed bottom of the receptacle;

Fig. 5 Illustrates said modified form completely sealed and treated;

Fig. 6 is an elevational section of another modified form of the receptacle; and

Fig. 7 is a perspective view of the bottom of another embodiment of the receptacle folded in the same manner as illustrated in Fig. 1 and 2.

It is the purpose of my present invention to provide a receptacle which is sealed by folding with an impressed bottom to the end of utilizing the well known matter of fact that receptacles ® produced by folding blanks are comparatively inexpensive in manufacture and thereby obtaining a receptacle having the advantages as to strength and tightness of receptacles of the more expensive kind which are produced by molding, and in ad- ¹⁰dition obtaining a method of extensive manufacturing of inexpensive receptacles.

In carrying out the aim of my invention I employ a tubular blank or a rectangular blank of paper or similar material and fold same so that ¹⁵a sealed bottom is obtained, whereafter said bottom is impressed so that reinforcing zones are obtained at the junctures between the body of the receptacle and edges of flaps that are obtained on the sealing of said bottom end. In the de- ²⁰scription hereinafter it is supposed that a paper blank is employed for the purpose referred to.

In the embodiment illustrated in Fig. 1-3 the bottom of the receptacle is sealed by folding primarily the rectangular paper blank I to consti- ²⁵tute a rectangular body one end of which is sealed by primarily folding the ends of two opposite side) walls into overlapping relation as shown in Fig. 1 and folding side flaps 3 thereby obtained into superposed relation, as shown in Figs. 2 and 3. ³⁰Then the bottom is subjected to a pressing action so that it is formed with a reinforcing zone 4 extending not only over the corners of the receptacle but all around the bottom leaving a channel 6 between said reinforce and the body of ³⁵the receptacle. Thus a reinforcing bulb 5 Is formed at the bottom of the receptacle, extending beyond the longitudinal seam obtained on primarily folding the rectangular blank as well as beyond the corners of the receptacle. Though ⁴⁰part of the reinforcing and tightening zones extending from one corner to another may be omitted they will provide an additional stiffening of the bottom of the receptacle and counteract the interior pressure of liquid, etc. supplied to the ⁴⁵receptacle. For the purpose of obtaining a particularly tight receptacle bottom it may be convenient to impregnate the inside of the receptacle with wax or any similar tightening substance. Then the channels 6 are filled partly or ⁵⁰entirely with wax as shown in Fig. 3.

It may under circumstances be convenient to perform the folding of the blank in a manner indicated in Mgs. 4 and 5, thereby dispensing with the seams 8 and 7 shown in Mg. 1. Such ⁶⁵

3,070,747 folding is executed in a manner well known in the art and therefore but a brief description thereof may be necessary herein. A rectangular blank or strip is folded about the end of a rec5 tangular mandrel so that said end supports the undivided bottom 9 of the receptacle to be formed. Then the edges 10 of two opposite ends 11 of the blank are folded into superposed relation as illustrated in Fig. 4 so that two opposite 10 flaps 12 are obtained constituting extensions of the parts 10. On proceeding with the known folding operation said flaps are, in order to prevent leakage, folded upon the side parts 10 into a position indicated in dash and dotted lines in 15 Fig. 4. Such a sealing will not ensure complete tightening as liquid will have a tendency of escaping through the seam at 13. Besides a receptacle folded in such manner will not have an attractive appearance, and part of the seam at 20 13 may accidentally be torn off.

If however according to this invention the bottom of the receptacle is pressed inwards the flaps 12 may be folded about the bottom 9 into the position shown in Fig. 5 as the subsequent press25 ing operation will completely ensure tightness and obviously possible irregularities of the surface of the bottom will then be unimportant, the more that such irregularities are in part removed by the pressing action. Even in this case 30 channels 9 may be obtained between the reinforcing zones and the body of the receptacle and such channels may be filled with wax, and it is obvious that a receptacle filled with liquid or heavy pulverulent material which has a tendency of bulg35 ing the bottom will rest more steady upon a surface if it is provided with the bulbs 5 than if Its bottom rests directly on said surface.

Though as mentioned the reinforcing bulbs will remove the disadvantage of the bulging of 40 the bottom of the receptacle it may under circumstances, especially if particularly heavy liquids are to be contained by the receptacle for a comparatively long time, be convenient to still more reinforce the bottom of the receptacle. For such 45 purpose a piece of pasteboard or the like 14, Fig. 6 may be applied to the bottom preferably prior to folding the flaps 3 thereabout. In addition such a piece will facilitate the pressing subsequently executed.

The tubular part of the receptacle illustrated in Fig. 2 can be pressed so that its bottom end obtains a rounded cross-sectional shape, as shown in Fig. 7. The projections 15 thereby obtained correspond to the corners of a rectangular receptacle. This embodiment will render a particularly steady resting of the receptacle on 5 uneven surfaces.