Apparatus for forming the stitch forming area of a sewing machin

Details Apparatus for forming the stitch forming area of a sewing machin Apparatus for forming the stitch forming area of a sewing machin

1984-06-01

1986-06-17

Crane, Daniel C.

Metal deforming

By tool-couple embodying nonplanar tool-face

With complementary tool-faces

72421, 72465, B21D 1122, B21D 4326

Patent

active

045948763

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: 155128 (1874-09-01), Ward
patent: 226051 (1880-03-01), Ells
patent: 1863729 (1932-06-01), Rafter
patent: 2066372 (1937-01-01), Tomalis
patent: 2096387 (1937-10-01), Tinnerman
patent: 2102572 (1937-12-01), Minkel
patent: 2306658 (1942-12-01), Willard
patent: 2958362 (1960-11-01), Creek
patent: 2964003 (1960-12-01), Carper
patent: 3310973 (1967-03-01), Leis
patent: 4044814 (1977-08-01), Zocher
patent: 4420962 (1983-12-01), Peterson

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