US1950232A - Bag construction - Google Patents

Description

. 5, 1934* c. 6. EDGERLY BAG CONSTRUCTION Filed Jul y 24, 1931 2 Sheets-Sheet 1 March 6, 1934.

C. O. E DGERLY BAG CONSTRUCTION Filed July 24. 1931 v 2 Sheets-Sheet 2 Y Patented Mar. 6, 1934 UNITED STATES.

PATENT OFFICE BAG CONSTRUCTION Application July 24, 1931, Serial No. 552,925

3 Claims.

My invention relates to bag construction and particularly to bags made of paper or the like, and to the method of making the same.

One of the objects of my invention is to produce a simple, practical and advantageous construction of a double walled paper bag.

A further object is to produce a simple, practical and advantageous construction of a double walled paper bag, wherein the inner wall is cov- 1 ered with a waxy substance.

A further object is to accomplish this result by a simple, expedient and improved method.

Paper bags of the type to which I refer are quite frequently produced having an interior lining composed of a waxed glassine paper and having an exterior container composed of any ordinary paper material.

One of the principal difliculties encountered in manufacturing bags of this type is to close the bottom end thereof. This is preferably accomplished by folding over the double bag ends and adhering them together with some sort of adhesive.

However, in the manufacture of bags having a waxed glassine or similar interior container a great deal of dimculty has been encountered in closing and adhering the bottom ends together. No satisfactory glutinous material has thus far been discovered that will eflect an adhesion between waxed papers, and as a result the cost of paper bags having waxed inner linings has necessarily been more or less prohibitive, due to the necessity of devising ways and means for sealing the bottom thereof.

My invention contemplates the provision of an improved method for manufacturing bags of this type, a method whereby the objections hereinbefore mentioned are overcome and whereby any of the common adhesive substances may be employed in sealing the bottom ends of the bag, and whereby a superior bag is produced.

The invention will be more clearly understood from the following description, taken in connec- 45 tion with the accompanying drawings in which a specific bag structure is disclosed.

In the drawings:

Fig. 1 is a perspective view of the outer bag taken before the bag is assembled.

Fig. 2 is a similar view of the inner waxed bag.

Fig. 3 is a perspective view of the completely formed double walled bag.

Fig. 4 is a fragmentary side elevational view of the lower end of the assembled bag before the 55 bottom is closed.

Fig. 5 is a similar view showing the bottom closed.

Fig. 6 is a vertical sectional View taken on the line 6-6 of Fig. 5 illustrating the manner in which the bag is closed. 30

For the purposes of illustration, I have shown in Figs. 1 and 2 the outer container 10 and the inner container 12, both of which are cut from stock in a well known manner and formed into rectangularly shaped forms having the side walls 5 14-14, the front wall 16 and the rear wall 18.

As can be seen on the drawings, the rear wall 18 is formed by securing together the overlapping edges 20 and 22 of the paper stock. The edges of outer bag 10 are preferably glued together and the edges of irmer bag 12 are also secured together in a similar manner, the opposed faces thereof being unwaxed for this purpose. It will be noted that the upper edge 24 and the opposite lower edge 26 of each container are" cut in a straight line. Similarly, the opposite edges 28 at the top and 30 at the bottom are formed with an arcuate edge, the upper edge 28 projecting beyond the corners, and the lower edge 30 curved inwardly from the edges. The upper edges 32 and 34 of the container are curved outwardly and the lower'edges 36 and 38 are curved inwardly.

The outlines of containers 10 and 12'may be similar in all respects except that the container 12 is formed with a cut-out portion 40 in its back wall 18. This cut-out may be formed medially of the back wall adjacent the lower edge thereof.

In assembling my improved bag, the container 12, which may be composed of a glassine bag, waxed on both sides, is placed inside of the container 10. Container 10 is slightly larger than container 12 and the glassine container is adapted to be telescopically positioned within the outer container 10. The double walled bag which is thus provided is assembled in this manner and the bottom is closed in a manner which will now be described.

A crease line 42 is formed a short distance from the bottom of the forms and, as shown in Fig. 4, the interior surface of the back wall 18 of the container 10 is exposed where it appears through the cut-outportion 40 of the interior glassine container. Glue or any similar adhesive is next applied to this exposed portion of the rear wall 18 of the container 10 and the bottom edges of both bags are folded over on the crease line 42. Thus the interior of outer wall 18 of container 10 is folded over and forced against the face of the front wall 16 of the outer container. The glue or other adhesive applied to the exposed portion of wall 18 adheres to the outer surface of wall 16 of the outer container, thus eifectivelysealing the bottom end of the bag thus formed. The foldedover portions 44 and 46 are neatly obscured by the overturned portions of the rear wall 18. Thus an effective seal is provided at the bottom of the bag and a neat and attractive package is formed. It will be observed that no adhesive is placed upon any portion of the interior waxed lining, nor is it necessary to do so. The interior liner, due to its lower portions. being folded over, is effectively secured in position within the container and a bag containing an ordinary paper exterior is thus provided. V

Due to the many commercial uses for bags or containers provided with waxed interior linings,

the construction I have described, and the method of constructing the bag enables me to produce this bag at a much lower cost than any of the similar bags heretofore produced. By eliminating the use of metal fasteners or highly involved means for heating and melting portions of the wax to allow an adhesive to be applied to the inner container, I have very substantially reduced the cost of producing these bags.

It will, of course, be understood that I contemplate the use of my invention, as applied, to bags having both ends similarly sealed, so that a completely enclosed and sealed package may be provided.

While I have illustrated and described a par ticular embodiment of my invention, I desire it to be understood that changes and modifications may be made therein without departing from the scope of my invention, and I do not wish to be limited in any particular; rather, what I desire to secure and protect by Letters Patent of the United States is:

1. An article of the class described comprising an inner and an outer bag element, the inner member telescopically mounted within the outer, said outer member having side walls with one bottom, edge straight and another arcuate in v shape, said inner member also having side walls with one bottom edge straight and another arcuatein shape, said inner member further having a cut-away portion in its side wall at the straight bottom edge, a fold line in both members spaced from the bottom thereof, adhesive mate rial on the inner side of the wall of said outer container having the straight bottom edge so arranged that when the bag elements are folded the adhesive may form a seal between the outer surface of the outer bag element above the arcuately cut bottom edge and the'inner surface of the other sidewall of said outer container.

2. An article of the classy described comprising an inner and an outer bag element, the inner member telescopically mounted within the outer, said outer member having side walls with one bottom edge straight and another arcuate in shape, said inner member also having side walls when the bag elements are folded the adhesive may form a seal between-the outer surface of the outer bag element above the arcuately cut bottom edge and the inner surface of the other side wall of said outer container, thereby firmly closing the bottom of said bag without employing sealing means in connection with said inner bag element.

3. An article of the class described comprising an inner waxed and an outer unwaxed bag element, the inner member telescopically mounted within the outer, said outer member having side walls with one bottom edge straight and another arcuate in shape, said inner member also having side walls with one bottom edge straight and another arcuate in shape, said inner member further having a cut-away portion in its side wall at the straight bottom edge, a fold line in both members spaced from the bottom thereof, adhesive material on the inner side of the wall of said outer container having the straight bottom edge so arranged that when the bag elements are folded the adhesive may form a seal between the outer surface of the outer bag element above the arcuately cut bottom edge and the inner surface of the other side wall of said outer container.

C. OSCAR EDGERLY.

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