Title: Deburring and die-shaping of punched holes in precision mass produced parts

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.

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Inventors: Zocher, Josef (Haaren, DT)

Application Number: 646726
Filing Date: 1976-01-05
Publication_date: 1976-12-21
Assignee: The Singer Company (Elizabeth, NJ)
Primary Class(es): 163/5 72/325
Other Classes:
US Patent Ref:

1103481	Jul, 1914	Buhren	163/5.
3333623	Aug, 1967	Recknagel et al.	163/5.

Other Refs:
Primary Examiner: Custer, Jr., Granville Y.
Assistant Examiner:
Attorney: Bell; Edward L., Smith; Robert E., Falk; Julian