Sheet feed shaft

Details Sheet feed shaft Sheet feed shaft

2004-06-08

2008-07-01

Bollinger, David H (Department: 3653)

Metal working

Method of mechanical manufacture

Roller making

C029S895310

Reexamination Certificate

active

07392586

ABSTRACT:
A sheet feed shaft is provided wherein mutually opposed spike-shape projections are formed throughout the whole surface of a metallic rod.A rotational angle of a metallic rod (1) is controlled to form a plurality of spike-shape portions whose bristled directions are opposite to each other while supporting the metallic rod at both ends thereof and a pair of punch units (24) each having a pair of perforating edges (28) arranged orderly in an axial direction of the metallic rod (1) are reciprocated with respect to a circumferential surface of the metallic rod (1) simultaneously from both sides of the metallic rod to perforate the circumferential surface of the metallic rod, the metallic rod being allowed to rotate step by step in a successive manner during the perforating work.

REFERENCES:
patent: 5971638 (1999-10-01), Sato et al.
patent: 6532661 (2003-03-01), Tsukada et al.
patent: 2001/0021684 (2001-09-01), Tsukada et al.
patent: 2004/0259706 (2004-12-01), Ueda et al.
patent: 10-203675 (1998-08-01), None

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