Method for forming the stitch forming area of a sewing machine t

Details Method for forming the stitch forming area of a sewing machine t Method for forming the stitch forming area of a sewing machine t

1981-10-26

1984-02-14

Crane, Daniel C.

Metal deforming

With cutting

Machining after final metal-deforming

72379, 29557, 112260, B21D 3500

Patent

active

044308787

ABSTRACT:
This invention relates to a cold forming process wherein a consistent stitch tongue profile is swaged into a planar throat plate blank. Thereafter, excess material resulting from the cold forming process is removed and the required needle holes and thread slots are provided in the blank.

REFERENCES:
patent: 110773 (1871-01-01), Miller
patent: 1497530 (1924-06-01), Mortensen
patent: 2182067 (1939-12-01), Bruecker
patent: 2364235 (1944-12-01), Muros
patent: 2807970 (1957-10-01), Dorman
patent: 3435654 (1969-04-01), Papst
patent: 4184242 (1980-01-01), Petrie
Brezler, R. A., Jr., "Making Sense of Worm Rolling", from American Machinist, McGraw-Hill, Inc., Dec., 1980, pp. 6, 129-140.

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