Patent · US Expired

Thread control mechanism for sewing machines

US4457247A · kind A · utility

2Cited by

7References

8Claims

0Family size

Assignee

Union Special Corporation · US

Inventors

Wolf R. von Hagen · Hemmingen, DE
Erwin F. Jurgens · Hemmingen, DE
Helmut Bauer · Schreiber, CA

Key dates

Filing date	Sep 29, 1982
Grant date	Jul 3, 1984
Priority date	—
Expiry date	Sep 29, 2002

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD05B51/00
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A needle thread control mechanism for sewing machines which permits a machine operator to adjust the stitch tightness includes a thread take-up mechanism arranged wholly outside of the machine frame and a thread controlling mechanism arranged directly between the needle thread take-up mechanism and a thread supply source. A thread controller, adapted to cooperate with the thread take-up mechanism, is also provided.

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