Patent · US Expired

Process and apparatus for manufacturing a drawn and twisted multifilament synthetic yarn

US4215530A · kind A · utility

6Cited by

5References

10Claims

0Family size

Assignee

ASA S.A. · FR

Inventors

Patrick Beau · Nuremberg, DE
Carlos M. Gabalda · Belleville, FR

Key dates

Filing date	Jan 9, 1979
Grant date	Aug 5, 1980
Priority date	—
Expiry date	Jan 9, 1999

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD02J1/22
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

In a process and apparatus for manufacturing drawn and twisted multifilament synthetic yarn an extruded and partially drawn filamentary synthetic yarn is subjected to a supplementary, simultaneous, drawing and twisting operation using a double twist spindle rotated such that the tension in the yarn causes drawing. After the spinning and drawing, the yarn is subjected to heat treatment under controlled tension and is then wound up.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.