Method of finless cold forming of sewing machine needle

Details Method of finless cold forming of sewing machine needle Method of finless cold forming of sewing machine needle

1976-07-16

1977-08-30

Custer, Jr., Granville Y.

Needle and pin making

Needle making

Processes

B21G 104

Patent

active

040448142

ABSTRACT:
The method of fabricating a sewing machine needle is disclosed in which the needle blade including the long groove and the eye portion with a thin eye-accommodating web is cold formed in one finless flow pressing operation. The method of forming the needle orienting flat on the needle butt and laterally displacing the needle blade relatively thereto by a flow pressing operation is disclosed. A method of flaring the side flanges particularly in the eye portion to facilitate threading and a needle so constructed is also disclosed.

REFERENCES:
patent: 3589428 (1971-06-01), Masujima
patent: 3861446 (1975-01-01), Zocher

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