Sewing – Special machines – Embroidering
Patent
1981-02-17
1984-06-05
Schroeder, Werner H.
Sewing
Special machines
Embroidering
112255, D05C 1108
Patent
active
044521561
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.
REFERENCES:
patent: 2158197 (1939-05-01), Pikul
patent: 2694389 (1954-11-01), Turkish
patent: 4254723 (1981-03-01), Rothstein
patent: 4285289 (1981-08-01), Bolldorf et al.
patent: 4300465 (1981-11-01), Tsuboi
Ripkens Hans-Gerd
Slomma Heinz-Georg
Teetz Wolfgang
Falik Andrew M.
Farber Martin A.
Maschinenfabrik Carl Zangs Aktiengesellschaft
Schroeder Werner H.
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