Programmed pressure foot positioning for control means sewing ma

Details Programmed pressure foot positioning for control means sewing ma Programmed pressure foot positioning for control means sewing ma

1993-06-09

1994-06-07

Nerbun, Peter

Sewing

Special machines

Darning

D05B 1900, D05B 2902

Patent

active

053179811

ABSTRACT:
A sound of percussion or impact which is produced as a result of a vertical movement of a pressure foot driven in synchronism with a vertical movement of a sewing needle is eliminated. A sphere 15 exposed through the lower surface of a pressure foot 10 as well as a coiled compression spring 16 which urges the sphere are provided, so that the resilience of the spring is effective to suppress a vertical movement of the fabric while allowing a movement of a fabric 9 in a horizontal plane, thus eliminating the need for a vertical movement of the pressure foot as the needle is driven up and down. Alternatively, an independent drive source may be provided to move the pressure foot in synchronism with the vertical motion of the needle through a minimized stroke.

REFERENCES:
patent: 1147960 (1915-07-01), Mathewson
patent: 1221291 (1917-04-01), Cornely
patent: 4676179 (1987-06-01), Nomura et al.
patent: 5080031 (1992-01-01), Suzuki et al.

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