US2041227A - Wrapper for powder, granular, or similar substances - Google Patents

Description

W J. w. CHALMERS 2,04152 WRAPPER FOR POWDER, GRANULAR, OR SIMILAR SUBSTANCES Filed July so, 1954 Patented May 19, 1936 UNITED STATES PATENT OFFICE WRAPPER; FOR POWDER, GRANULAR, R SIMILAR SUBSTANCES John Walker Chalmers, Deptford, London,

England Application July 30, 1934, Serial No. 737,664 In Great Britain August 1, 1933 3 Claims.

struction that the contents of the wrapper are very apt to escape between the folds of the wrapper at theblock-end thereof, and it is an object of the invention. to provide a wrapper which is secured for the purpose of prevent'mg the contents from escaping from the block end of the wrapper.

The wrapper is preferably reinforced so that it may be usedeither as an inner container for insertion into a further wrapper, or as an independent container by suitably closing the open end thereof.

According to the present invention there is provided a wrapper for powder, granular or similar substances comprising a block ended wrapper having side folds which are secured together 95 (e. g., by adhesive) and a reinforcing member or members contained within the wrapper and secured thereto (e. g. by adhesive applied to the innermost side folds of the wrapper).

The invention will be more particularly dega scribed with reference to the accompanying drawing, in which:-

Figure 1 shows a blank from which a wrapper constructed in accordance with the invention is formed, and illustrates the position of the lines 5 of adhesive used to secure the folds of the wrapper together, and to secure the reinforcing member in position within the wrapper.

Figure 2 illustrates a stage in the folding of the blank about the reinforcing member.

0 Figure 3 illustrates a wrapper formed in accordance with the invention, prior to the open end of the wrapper being closed.

Figure 4 illustrates a modified form of blank from which a wrapper constructed in accordance 4, with the invention may be formed.

Figure 5 illustrates a stage in the folding operations when using a blank constructed in accordance with Figure 3.

Figure 6 shows a completely folded and secured 5 wrapper constructed from the blank illustrated 55 any suitable material, such for example, as transparent grease-proof or other paper, and is provided along its longitudinal edges with lines of adhesive 2, which are arranged in close proximity with the longitudinal edges of the wrapper blank as shown in Figure 1, and which may extend along the entire length of the blank in the manner illustrated. In some instances, the blanks are severed from a continuous web of wrap-ping material, and the adhesive is applied to the blanks before they are severed from the web. In such 0 cases, the lines of adhesive may terminate a short distance from the shorter edges of the blank in order that when the cutting apparatus operates to sever the blank from the web, the knives operate at that portion of the blank where there is tudinal folding lines l about which the side folds 20:

of the wrapper are folded.

In order to form the wrapper, a strip -5 of reinforcing material, which may for example comprise a cardboard strip, is folded into a U shape, and the blank I is then folded into a U 2'5 about the strip'5, so that the limbs of the U of the wrapper extend along the open sides of the U formed by the strip 5. The narrow end folds 6 (see Figure 2) of the wrapper are then folded inwardly against the sides of the strips 5 and 3b are caused toadhere to the strip by means of the adhesive lines 2 and 3, as seen clearly in Figure 2.: The operation of folding inwardly the narrow end folds 6 causes substantially trit angular portions 1 to be formed at the block end of the wrapper, and as the side folds 8 and 9 of the wrapper are folded into engagement with the reinforcing member 5, the triangular portions 1 become secured to the respective side folds 8 and 9, as can be clearly seen from Figure 2. 40

When the side folds 8 and 9 are folded into engagement with each other the first folded side fold, for example, the fold 8 is caused to adhere to the reinforcing member 5 by both of the lines 2, 3 of adhesive applied to the wrapper, whilst the outer fold, for example the fold 9, is caused to adhere to the strip 5 by means of the line 3 of adhesive applied thereto, and to the previously folded side fold by means fo the line 2 of adhesive. The container when folded in the manner just described has the appearance illustrated in Figure 3, and the lines of adhesive 2 and 3 are arranged as shown in this figure.

From Figure 3 it will be seen that the adhesive occurs at each point at which it would be possible, due to the folds of the wrapper, for any of the contents of the container to escape, but owing to the fact that the wrapper is secured along the whole length of the wrapper to the strip 5 and also that adhesive is placed between each folded portion of the wrapper at the block end thereof, it is impossible for any of the contents of the container to escape from the block end of the container.

Referring to the modified form of the invention illustrated in Figures 4 and 5, the blank I is again provided with lines of adhesive 2, but in the place of the longitudinal lines of adhesive 3, transverse lines of adhesive II] are provided as shown in Figure 4, and the wrapper is folded about the strip 5 in the manner previously described. The lines of adhesive IE] are arranged so that when the side folds 8 and 9 of the wrapper are folded into engagement with the reinforcing member 5 the portions l0 are secured thereto and securely hold the side folds of the wrapper together and prevent the escape of material from between them in a manner similar to that previously described.

Referring to Figure 6, it will be seen that the folds at the block end of the wrapper are securely held together and to the strip 5 so that it is impossible for the contents of the wrapper to escape from between the folds at the block end of the wrapper.

It will be seen from the drawing that the strips 5 protrude slightly beyond the open end of the wrapper, but this is only as a matter of convenience, and if desired, the strips may terminate either flush with the open end of the wrapper, or if desired, slightly below the open end of the wrapper. The open end of the wrapper, as illustrated in Figure 3 or 6, may, if desired, be folded down and secured in any suitable manner, or if desired, the wrapper may be inserted into a further wrapper or wrappers and the open end interfolded with said other wrapper or wrappers in order to obtain a completely closed wrapper, the contents of which cannot escape from either end of the wrapper.

It will be appreciated that instead of using a single strip of material 5 for the reinforcing member as above described, two shorter portions of reinforcing material may be utilized, each portion being of a length substantially equal to the length of the limbs of the U of the reinforcing member illustrated in the drawing and the base portion of the U as illustrated may be dispensed with. It will be seen that by using two strips of reinforcing material in this manner, the strips would still be secured to the wrapper in the manner described, the only difference being that the base portion of the wrapper would not be reinforced.

What I claim as my invention and desire to secure by Letters Patent is:

1. A rectangular block-ended wrapper comprising a pair of side folds on each of two opposed sides of the wrapper, end folds at the block end of the Wrapper cooperating with the side folds, a reinforcing element for each of said opposed sides, a line of adhesive adjacent each longitudinal edge of the wrapper on the inner side thereof, and at least one line of adhesive applied to the inner side of the wrapper and adjacent the line about which each of said side folds is formed, the major portion of that face of the wrapper to which the lines of adhesive are applied being free from adhesive.

2. A rectangular block-ended wrapper comprising a pair of side folds on each of two opposed sides of the wrapper, end folds at the block end of the wrapper cooperating with the side folds, a reinforcing element for each of said opposed sides, and two pairs of substantially parallel lines of adhesive applied to the inner side of the wrapper, one line of each pair being adjacent a longitudinal edge of the wrapper and the other line of each pair being adjacent the line about which each of said side folds is formed, the major por tion of that face of the wrapper to which the lines of adhesive are applied being free from adhesive.

3. A rectangular block-ended wrapper comprising a pair of side folds on each of two opposed sides of the Wrapper, end folds at the block end of the wrapper cooperating with the side folds, a cardboardreinforcing element for each of said opposed sides, said element consisting of a strip of comparatively rigid material the width of which is substantially equal to the width of the side to be reinforced, a line of adhesive adjacent each longitudinal edge of the wrapper on the inner side thereof, and at least one line of adhesive applied to the inner side of the wrapper and adjacent the line about which each of said side folds is formed, the major portion of that face of the wrapper to which the lines of adhesive are applied being free from adhesive.

JOHN WALKER CHALMERS.

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