Procedure and device for the manufacture of plastic zipper closures with orientable molecular structure (Machine-translation by Google Translate, not legally binding)

摘要

Process and device for the manufacture of plastic slide fasteners with orientable molecular structure, for example polyurethane polyamide yarns, characterized in that an undrawn polyamide yarn of any desired section, preferably round, is stretched by a forming pressure exerted transversely to the yarn direction in order to achieve a molecular orientation, thanks to said forming pressure, teeth placed one behind the other are formed with heads and connecting pieces extended between the teeth, and then said thread is interwoven or sewn with a textile tape. (Machine-translation by Google Translate, not legally binding)