PORTABLE BAG

Abstract: The invention concerns a portable bag (10a) of stitchable material, comprising an upper part (12), a mantle (11) and a bottom (13). The upper part (12) of the bag (10a) has been provided with a carrying member (15), for instance a carrying aperture or equivalent. The upper part (12) of the bag (10a) has been folded at least once and formed with the aid of a transversal seam (16), said seam (16) being disposed to close the upper part (12). A reinforcing patch (14) has been placed, prior to folding the upper end (12), in the upper end (12) upon the mantle (11), the reinforcing patch (14) being disposed, when the upper end (12) is being folded. to remain interposed in the folded upper end (12). The folded upper end (12) has been stitched closed with a stitched seam (16).

Description: The present invention concerns a portable bag of a stitchable material, comprising an upper part furnished with a reinforcing patch, a mantle and a bottom, on said bag the upper part being provided with a carrying member, such as e.g. a carrying aperture or equivalent, and in said bag the upper part being folded at least once and being formed with the aid of a transversal seam, said seam being arranged to close the upper part. The document US-A-2 345 434 describes a bag with a reinforcing patch which is formed by a web of the mantle of the bag, said web is elongated beyond the upper end of the closed bag. After stitch-closing the folded upper end of the bag, the reinforcing patch is folded over the upper end and glued over the stitched seam, so as to cover the seam. Furthermore, in the document DE-A-2 357 667 a portable bag with a reinforced carrying member is described. The reinforcement is achieved by folding an elongated web portion of each side of the bag towards the outside, so that the elongated portions form a double layer of said web in an upper part on either side of the bag. In Fi-A-65751 (≈ EP-A-104 406) is disclosed a portable bag of the above kind, e.g. a plastic bag, a plastic-surfaced bag or a plastic-laminated bag. In this design of prior art the upper part has been folded at least once, and the folded upper part has been connected to the mantle with the aid of a reinforcing patch, said reinforcing patch being arranged at the same time to cover at least part of the seam with a view to improving the strength thereof. The bag of the Finnish Patent No. 65751 is appropriate to be used in storing and transporting bulk goods, such as chemicals, fertilizers, cement products or equivalent. Depending on the kind and the intended use of the bulk goods, the portable plastic bag is intended, as to its size, for storing and transporting bulk goods in the weight of about 5 to 25 kg. One disadvantage of this known prior art is that the reliable durability of the portable bag is insufficient while the bag is carried. It is therefore the object of the invention to provide a portable bag in which reliable durability is ensured while the bag is being carried. The object of the invention is achieved with a bag according to claim 1. The bag of the invention affords numerous significant advantages. Thanks to the reinforcing patch, reliable durability of the bag while it is being carried has been ascertained. It is possible to make the bag of the invention of a breathing material, that is, of paper for instance, which is an advantage not afforded by any bag of prior art. The bag of the invention may be made of any stitchable material whatsoever, or of a combination of such materials. Particularly well-suited materials are HDPE or polypropylene fabrics. The bag of the invention is therefore particularly appropriate for those kinds of products in which moisture may condense. The design of the invention may be implemented in connection with any bag bottom design known in itself in the art. Thus, the bottom may be straight, and stitched closed in a manner known in itself in the art. The bottom of the bag may also consist of a so-called valve bottom, by the aid of which the bag can be filled with products through a filling valve. In the case of such designs, withdrawing the product is also feasible by undoing the stitched seam in the upper part of the bag. It is highly advantageous in the bag of the invention to use a reinforcing patch of textile fabric. A highly advantageous material is e.g. woven polyprolylene fabric, woven HDPE fabric or Tyvek® textile fabric material, or equivalent. The invention is described in detail, referring to certain advantageous embodiments of the invention, presented in the figure of the attached drawing, yet to which the invention is not meant to be exclusively confined. Fig. 1 presents the bag blank for a bag according to the invention, in axonometric view. Fig. 2a presents an advantageous embodiment of the bag blank of Fig. 1, in elevational view. Fig. 2b presents another advantageous embodiment of the bag blank of Fig. 1, in elevational view. Fig. 3a presents the completed bag of Figs 1 and 2a, in axonometric view. Fig. 3b presents the completed bag of Figs 1 and 2b, in axonometric view. In the embodiment of Figs 1, 2a and 3a, the portable bag in general has been denoted with reference numeral 10a. The bag 10a comprises an upper part 12, a mantle 11 and a bottom 13. The upper part 12 of the bag 10a has been provided with a carrying member 15, for instance a carrying aperture or equivalent. The upper part 12 of the bag has been folded at least once, and it has been formed with the aid of a transversal seam 16. It is thus understood that the seam 16 has been arranged to close the upper part 12 of the bag. In the embodiment of Figs 1, 2a and 3a, as taught by the fundamental idea of the invention, the reinforcing patch 14 has, prior to folding the upper end 12, been placed in the upper end 12 upon the mantle 11, the reinforcing patch 14 having been arranged, when the upper end 12 is being folded, to remain interposed in the upper end 12, as illustrated by Fig. 2a. The folded upper end 12 is then stitched closed with a stitched seam 16. In this embodiment the bottom 13 of the bag 10a is closed in a way known in itself in the art, with a stitched seam 17. The completed bag 10a will then be as shown in Fig. 3a. In the embodiment of Figs 1, 2b and 3b the bag or the invention in general is denoted with reference numeral 10b. This embodiment differs from the preceding embodiment in that the upper end 12 of the bag 10b has first been folded and the reinforcing patch 14 has been placed on one side of the upper end 12 or has been disposed to go over the folded upper end 12 and to extend also to the other side of the upper end 12, as shown in Fig. 2b. The reinforcing patch 14 is then attached with glue to the folded upper end 12, and the folded upper end 12 is stitched closed with a stitched seam 16. In that connection the stitched seam 16 at the same time runs across the reinforcing patch 14, as shown in Fig. 3b. In this embodiment the bottom structure 13 of the bag 10b comprises a filling valve 18 for filling bulk goods into the completed bag 10b. The mantle 11 usually consists, in both embodiments, of a plurality of material layers, e.g. of six separate paper layers. In certain applications one of the layers may consist of a special material, such as for instance bitumen-impregnated paper or fabric. Since in embodiments of the present invention greater strength is achieved owing to the reinforcing patch 14, the bag of the invention may be produced leaving out one or several material layers whereby considerable cost savings are achieved at the same time.

Claims: A portable bag of a stitchable material comprising an upper part (12) provided with a reinforcing patch (14), a mantle (11) and a bottom (13), the upper part (12) being provided with a carrying member (15), e.g. a carrying aperture or equivalent, and being folded at least once and closed with the aid of a transversal seam (16), wherein the reinforcing patch (14) is made of a separate piece, characterized in that the transversal seam (16) is a stitched seam and is disposed to run over the reinforcing patch (14). A portable bag according to claim 1, characterized in that the bag is made of moisture-permeable materials. A bag according to one of the claims 1 or 2, characterized in that the reinforcing patch (14) consists of textile fabric material. A bag according to claim 3, characterized in that the textile fabric material is a polypropylene material. A bag according to claim 3, characterized in that the textile fabric material is an HDPE material. A bag according to claim 3, characterized in that the textile fabric material is Tyvex ® material. A bag according to one of the preceeding claims 1 to 3, characterized in that the reinforcing patch (14) is disposed to remain interposed in the folded upper part (12). A bag according to one of the preceeding claims 1 to 3, characterized in that the reinforcing patch (14) is disposed at one side of the folded upper part (12). A bag according to claim 8, characterized in that the reinforcing patch (14) is disposed to go over the folded upper part (12) so as to extend on both sides of the folded upper part (12).

Inventors: RANTANEN, KEIJO
Applicants: OY W. ROSENLEW AB
Application year: 1988
Main classification: B65D33
IPC codes: A45C3, B65D33