Sewing – Stitch forming – Feeding work material
Patent
1979-07-05
1980-07-29
Nerbun, Peter
Sewing
Stitch forming
Feeding work material
112158E, D05B 2704
Patent
active
042145430
ABSTRACT:
A sewing machine is provided with an electronically controlled top feed arrangement wherein an upper feed dog and a presser foot are adapted to alternately apply and relieve pressure upon a work fabric, the upper feed dog and the presser foot being oppositely phased with respect to each other. A linear actuator is coupled to reciprocate the upper feed dog along a feed line and a memory stores feed data including for each stitch a first data portion for controlling the feed stroke of the upper feed dog and a second data portion for controlling the return stroke of the upper feed dog.
REFERENCES:
patent: 3099974 (1963-08-01), Chudner
patent: 3162158 (1964-12-01), Chudner
patent: 3368507 (1968-02-01), Orth
patent: 3730117 (1973-05-01), Ritter et al.
patent: 3808995 (1974-05-01), Dobner et al.
patent: 3867889 (1975-02-01), Conner, Jr.
patent: 3872808 (1975-03-01), Wurst
patent: 3935826 (1976-02-01), Nicolay
patent: 4120254 (1978-10-01), Herr et al.
Garron Stephen A.
Sedlatschek Robert
Sudano John J.
Bell Edward L.
Davis David L.
Nerbun Peter
Smith Robert E.
The Singer Company
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