Patent ID: 7392586
Filing Date: 2008-07-01
Classification: B41J,B65H,Y10T

Abstract:
1. A method for manufacturing a sheet feed shaft comprising: providing a metallic rod with a circumferential surface having a defined length; supporting said metallic rod at each end; providing a pair of punch units, each punch unit having a pair of perforating members, one punch unit being located on one side of said metallic rod, another punch unit being located on another side of said metallic rod such that said another punch unit is disposed 180° opposite said one punch unit, each perforating member having perforated edges arranged in an axial direction with respect to said metallic rod; controlling a rotational angle of said metallic rod; simultaneously reciprocating each punch unit such that said one punch unit approaches said metallic rod from a first direction and said another punch unit approaches said metallic rod from a direction opposite said first direction, whereby said perforated edges are forced into said circumferential surface from both sides of said metallic rod to form a plurality ofspike-shape portions whose bristled directions are opposite to each other, said metallic rod being rotated step by step in a successive manner, said plurality of spike-shape portions extending along entire length of said circumferential surface of said metallic rod.