Pouch for packaging liquid fuels is made from two plastic sheets welded together around their edges, one corner being cut to form spout which is supported by curved line of double welds below it

摘要

The pouch for packaging liquid fuels is made from two plastic sheets welded together around their edges. One corner is cut to form a spout (4) whose edges (8, 9) are also welded together. It is supported by a curved double line of welds (12) below it.