Thread cutting unit having a rotatably driveable cutting knife a

Details Thread cutting unit having a rotatably driveable cutting knife a Thread cutting unit having a rotatably driveable cutting knife a

1989-09-22

1991-04-23

Schroeder, Werner H.

Sewing

Elements

Thread cutting, severing or breaking

112285, 112294, 112295, 112291, 112293, 112296, 112297, 112298, 112300, D05B 6502, D05B 6900, D05B 6500

Patent

active

050091778

ABSTRACT:
A thread cutting unit cooperating with the bed of a sewing machine includes a lower shaft, a cutting knife and a loop spreading plate respectively fixed to the lower shaft and positioned adjacent to the hook. The thread cutting knife and the loop spreading plate cross each other in a space between the hook and the throat plate. The thread cutting unit is provided with a thread cutting driving unit which comprises a thread cutting knife driving shaft, a loop spreading plate driving shaft, a rotational motion transmission device, a thread cutting supporting member carrying thread cutting knife, a first turnable interlocking mechanism and a second turnable interlocking mechanism. The thread cutting supporting member is rotatably supported on the bed.

REFERENCES:
patent: 3605664 (1971-09-01), Hedegaard
patent: 3728978 (1973-04-01), Honda
patent: 3776161 (1973-12-01), Papajewski
patent: 3921554 (1975-11-01), Uozaki
patent: 4077342 (1978-03-01), Steckenrider
patent: 4098208 (1978-07-01), Hedegaard
patent: 4141307 (1979-02-01), Okada
patent: 4256048 (1981-03-01), Jung
patent: 4395961 (1983-08-01), Papajewski
patent: 4437423 (1984-03-01), Yamazawa
patent: 4589362 (1986-05-01), Dusch

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