Presser foot automatic lifting device

Details Presser foot automatic lifting device Presser foot automatic lifting device

1983-04-22

1985-04-30

Jaudon, Henry S.

Sewing

Elements

Presser devices

D05B 2706, D05B 2902

Patent

active

045136750

ABSTRACT:
A sewing machine with a workpiece feed comprises a feed dog positioned below the workpiece providing a four-motion feed movement. A presser foot is fixed to a presser foot bar and can be raised from the workpiece during the stitching cycle by a lifting gear to ensure turning of the workpiece. This makes it possible to follow complicated seam patterns. The lifting gear is constructed in such a way that the presser foot is raised from the workpiece while the needle perforates the material, during its downwardly directed movement approximately up to its bottom dead center position.

REFERENCES:
patent: 1242403 (1917-10-01), Weis
patent: 2106517 (1938-01-01), Christensen et al.
patent: 2386840 (1945-10-01), Colegrove
patent: 2544029 (1951-03-01), Kotzin et al.
patent: 3263634 (1966-08-01), Gross
patent: 3282237 (1966-11-01), Niekrawietz
patent: 3828704 (1974-08-01), Von Hagen et al.
patent: 3948195 (1976-04-01), Chudner
patent: 4067275 (1978-01-01), Wilhembacher
patent: 4292907 (1981-10-01), Gilbride et al.

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