Wiper unit of a sewing machine

Details Wiper unit of a sewing machine Wiper unit of a sewing machine

1989-11-24

1991-09-03

Schroeder, Werner H.

Sewing

Elements

Thread cutting, severing or breaking

D05B 6500

Patent

active

050442902

ABSTRACT:
A wiper unit has a supporter secured to the arm of a sewing machine. A stopper is secured to the supporter. A wiper shaft is rotatably supported by the supporter. The stopper restricts the rotation of the shaft. A wiper is mounted on the shaft. The wiper has a wiper arm and a tip end thereof. The tip end has a hook for wiping the tip end of an upper thread. A wiper operation crank is secured to the wiper shaft for adjusting a turning operation thereof relative to the wiper. An operation link is connected by a pin to the operation crank. A driving unit drives the operation crank reciprocally and drives the crank and shaft to turn about the axis of the shaft.

REFERENCES:
patent: 3601074 (1971-08-01), Hagen
patent: 3847102 (1974-11-01), Rogner

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