Snap action thread and gimp trimming on a buttonhole machine

Details Snap action thread and gimp trimming on a buttonhole machine Snap action thread and gimp trimming on a buttonhole machine

1993-09-29

1995-09-05

Crowder, Clifford D.

Sewing

Special machines

Buttonhole

112253, 112298, 83586, D05B 308, D05B 6500, B26D 108

Patent

active

054471087

ABSTRACT:
The invention relates to thread trimming devices for eyelet buttonhole machines. The invention comprises a thread trimming device having a snap action spring arm knife. As the thread hook positions the thread and gimp, a cam lifts up the end of the spring arm. The cam then releases the knife whose torque snaps down and cuts the thread and gimp against a second knife edge. The thread and gimp are also held together at this point for the next buttonhole by a thread retainer which is built into the knife.

REFERENCES:
patent: 807239 (1905-12-01), Britton
patent: 1492133 (1924-04-01), Kiewicz
patent: 1638785 (1927-08-01), Ray
patent: 1743356 (1930-06-01), Kiewicz
patent: 1846398 (1932-02-01), Kiewicz
patent: 1865140 (1932-06-01), Reece
patent: 1988460 (1935-01-01), Pikul
patent: 2210639 (1940-08-01), Spaine et al.
patent: 3254616 (1966-06-01), Pudelko
patent: 3365991 (1968-01-01), Smith
patent: 3688716 (1972-09-01), Heimann et al.
patent: 3894459 (1975-07-01), Deppe et al.
patent: 4404921 (1983-09-01), Kastrup et al.

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