Feed dog structure of sewing machines

Details Feed dog structure of sewing machines Feed dog structure of sewing machines

1981-06-19

1984-01-03

Schroeder, Werner H.

Sewing

Stitch forming

Feeding work material

112202, D05B 5714

Patent

active

044236930

ABSTRACT:
A sewing machine with a vertically reciprocable and laterally swingable needle for sewing provided with an upper thread includes a rotatable loop taker for catching a thread loop during synchronous rotation thereof with the needle, and is rotatable in a horizontal plane with respect to the needle. A bobbin member is mounted within the loop taker and carries a lower thread forforming a lock stitch with the lower thread when the loop taker catches a thread loop. A feed dog member includes a plurality of feed dog elements for synchronously moving vertically and horizontally with the needle so as to allow the fabric to be moved relative to the needle. A thread guide is disposed adjacent a certain one of the plurality of feed dog elements for guiding the lower thread to a predetermined side of the swinging needle each time the feed dog member is vertically moved.

REFERENCES:
patent: 2712802 (1955-07-01), Cottrell
patent: 3993007 (1976-11-01), Ohina et al.
patent: 4182250 (1980-01-01), Johnson
patent: 4207826 (1980-06-01), Edwards

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