US 2070747 A
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Description (OCR text may contain errors)
G. ORSTRCM Feb. 16, 1937.
RECEPTACLE Filed Jan. 26, 1934 2 Sheets-Sheet 1 G. CRSTROM Feb. 16, 1937.
RECEPTACLE Filed Jan. 26, 1934 2 Sheets-Sheet 2 Patented Feb. 16, 1937 UNITED STATES PATENT OFFICE RECEPTACLE Sweden Application January 26, 1934, Serial No. 768,481
In Sweden February 2, recs Claims.
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 5 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 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 eificiency, 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 sealed bottom which is strong and durable andthe 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-' dition obtaining a method of extensive manufacturingof 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 a 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 descriptlon 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 constitute 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. Then the bottom is subjected to a pressing action so that it is formed with a reinforcing zone ll 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 the 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 40 part 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 receptacle. 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 entirely 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 Figs. 4 and 5, thereby dispensing with the seams 8 and I shown in Fig. 1. Such 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 rectangular mandrel so that said end supports the undivided bottom 9 of the receptacle to be formed. Then the edges IQ of two opposite ends I i of the blank are folded into superposed relation as illustrated in Fig. 4 so that two opposite flaps i2 are obtained constituting extensions of the parts i0. n proceeding with the known folding operation said flaps are, in order to prevent leakage, folded upon the side parts l0 into a position indicated in dash and dotted lines in Fig. 4. Such a sealing will not ensure complete tightening as liquid will have a tendency of escaping through the seam at l3. Besides a receptacle folded in such manner will not have an attractive appearance, and part of the seam at I3 may accidentally be torn-off.
If however according to this invention the bottom of the receptacle is pressed-inwards the flaps l2 may be folded about the bottom 9 into the position shown in Fig. 5 as the subsequent pressing 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 channels 6 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 pulve'rulent material which has a tendency of bulging 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.
Thou'gh as mentioned the reinforcing bulbs will remove the disadvantage of the bulging of 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 purpose a piece of pasteboard or the like i4, Fig. 6 may be applied to the bottom preferably prior to folding the flaps 3 thereabout. In addition such a piece will facilitate thepressing 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 l5 thereby obtained correspond to the corners of a rectangular receptacle. This embodiment will render a particularly steady resting of the receptacle on uneven surfaces.
1. A receptacle having a tubular body and a bottom end which is sealed by folded end portions of the tubular body comprising flaps having folded edges, and a plurality of projections each cons ituting an extension of said tubular body at the juncture between one of said edges and said tubular body leaving depressions between said edges.
2. A receptacle having a tubular body formed of a plurality of flat side walls, and a bottom end which is sealed by folded end portions of said walls comprising flaps having folded edges which extend from corners of the receptacle, and a plurality'of projections each constituting an extension of said tubular body at one of said corners leaving depressions between said corners.
3. A receptacle having a tubular body and a bottom end which is sealed by folded end portions of the tubular body comprising flaps having folded edges, and a pluralityof projections each constituting an extension of said tubular body at the juncture between one of said edges and said tubular body leaving depressions between said edges, said projections comprising upturned reinforcing zones within said' tubular body.
4. A receptacle having a tubular body and a bottom end which is sealed by folded end portions of the tubular: body comprising flaps having folded edges, and a plurality of projections each constituting an extension of said tubular body at the juncture between one of said'eriges and said tubular body leaving depressions between said edges, said projections constituting channels within the receptacle.
5. A receptacle having a tubular body the bottom end of which has a rounded cross-sectional shape and is sealed by folded end portions of the. tubular body, comprising flaps having