Differential feed adjusting mechanism

Details Differential feed adjusting mechanism Differential feed adjusting mechanism

1987-03-17

1988-06-07

Hunter, H. Hampton

Sewing

Stitch forming

Feeding work material

D05B 2708

Patent

active

047488395

ABSTRACT:
A sewing machine having differential material feed, with a main feed dog and differential feed dog being mechanically connected to one another in such a manner that if the feed stroke length of the first feed dog is changed, the feed stroke length of the second feed dog is changed inversely in a predetermined ratio.

REFERENCES:
patent: 3967565 (1976-07-01), Hirayama et al.
patent: 4027609 (1977-06-01), Kerr
patent: 4436045 (1984-03-01), Bonham et al.
patent: 4527497 (1985-07-01), Kerr et al.
patent: 4624202 (1986-11-01), Alberti et al.

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