Patent · US Expired

Variable thread tensioner for embroidery machines

US4452156A · kind A · utility

6Cited by

5References

16Claims

0Family size

Assignee

Maschinenfabrik Carl Zangs Aktiengesellschaft · DE

Inventors

Wolfgang Teetz · Kerken, DE
Heinz-Georg Slomma · Viersen, DE
Hans-Gerd Ripkens · Goch, DE

Key dates

Filing date	Feb 17, 1981
Grant date	Jun 5, 1984
Priority date	—
Expiry date	Feb 17, 2001

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD05C11/08
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A device for adjusting the thread tension of multi-needle automatic embroidery machines in which each needle or thread lever has associated with it a thread brake having two brake disks between which there extends a thread which is guided over the thread lever to the needle. One of the brake disks which are pressed against each other by a spring is displaceable relative to the other brake disk in order to change the thread tension. To set the thread tension for all the needles embroidering and at the same time for those needles which are disconnected to zero or a maximum value, the displaceable brake disk (11) of each thread brake is mounted on a bolt (13) which is displaceable relative to both brake disks (10, 11). The bolt is provided with an abutment (13c) for carrying along the displaceable brake disk (11). Each bolt (13) of each of the thread brakes is displaceable by one of several cams (15) which are arranged jointly on a camshaft (16). The camshaft (16) can be driven by a servomotor which can be controlled by information from a data storage device which controls the automatic embroidery machine.

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