METHOD AND APPARATUS FOR MANUFACTURING A STORAGE BAG AND STORAGE BAG Russian patent published in 2022 - IPC B31B70/855 

FIELD: storage.

SUBSTANCE: disclosed in the invention is a method for manufacturing a storage bag with a built-in valve, the resulting bag, and an apparatus for manufacturing such a bag. Method of manufacturing a storage bag (2) with a first open end (7) and a second open end (8), made with a valve (3), including the following stages. The stage of providing a tubular part (5) made from a web, in particular, of a polymer material, preferably woven polyolefin or woven polypropylene material, followed by closing the first open end (7) of the tubular part (5), preferably by attaching a first insulating tape (10). The stage of forming a valve (3) of the bag (2) by bending the corner (13) of the second open end (8) of the tubular part (5) into the tubular part (5). The stage of cutting the lower edge strip (22) of the tubular part (5) with the formed valve (3) at the second open end (8) of the tubular part. The stage of closing the second open end (8) by attaching a second insulating tape (25) thereto.

EFFECT: integrity and durability of the bag, as well as security of attachment of the valve.

26 cl, 7 dwg