Thread cutter and drive unit for a chain stitch sewing machine

Details Thread cutter and drive unit for a chain stitch sewing machine Thread cutter and drive unit for a chain stitch sewing machine

1996-03-13

1997-09-09

Izaguirre, Ismael

Sewing

Elements

Thread cutting, severing or breaking

112166, 112201, D05B 6500

Patent

active

056645112

ABSTRACT:
A thread cutter for a chain stitch sewing machine which performs chain stitch sewing by cooperation of a needle driven up and down and a looper arranged under a needle plate, including: a movable knife arranged so that it can advance into or retract from a gap between a top surface of the looper and an under surface of the needle plate; a knife driving mechanism for advancing and retracting the movable knife; a stationary knife arranged under the needle plate for cutting a sewing thread in cooperation with the movable knife when the movable knife is retracted; and a thread holding plate for holding a cut end of the sewing thread on the side of the looper in a predetermined position by a further retracting operation of the movable knife after the sewing thread is cut and a drive unit for a multi-sewing machine.

REFERENCES:
patent: 3481291 (1969-12-01), Schilling
patent: 3532065 (1970-10-01), Marforio
patent: 3595188 (1971-07-01), Schmedding
patent: 4543897 (1985-10-01), Heinzle

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