Sewing – Special machines – Darning
Patent
1989-05-23
1991-07-09
Schroeder, Werner H.
Sewing
Special machines
Darning
11212115, 474109, D05B 2100, F16H 708
Patent
active
050295411
ABSTRACT:
A device for the automatic formation and sewing of a hem at a continuous edge of an opening of variable width in a workpiece, a hem-forming device on a sewing machine which is controlled by a logic device. An actual force acting upon a guide body is compared with at least one desired force preselectably stored in the logic device. In the event of a difference between these forces, an adjusting device actuates the guide body, serving as a cloth tensioner, until an actual force corresponding to the desired force is established on the guide body.
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Norz Wolfgang
Rohr Gunter
Lewis Paul C.
Schroeder Werner H.
Union Special GmbH
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