Deburring and die-shaping of punched holes in precision mass pro

Details Deburring and die-shaping of punched holes in precision mass pro Deburring and die-shaping of punched holes in precision mass pro

1976-01-05

1976-12-21

Custer, Jr., Granville Y.

Needle and pin making

Needle making

Processes

B21G 328

Patent

active

039982599

ABSTRACT:
A method of manufacture is disclosed by which punched holes in mass produced parts, such as sewing machine needles and yarn guiding elements for textile machines, can be readily shaped, deburred and polished using die-shaping procedures only.

REFERENCES:
patent: 1103481 (1914-07-01), Buhren
patent: 3333623 (1967-08-01), Recknagel et al.

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