摘要 |
PROBLEM TO BE SOLVED: To provide a paper feed roller capable of keeping friction coefficient required for conveying a paper sheet even when ink adheres to a roll surface. SOLUTION: In a paper feed roller where a roller made of rubber or thermoplastic elastomer is formed of on a shaft core, both normal directional polish divisions and reverse directional polish divisions exist on the surface of the roller, and the normal directional polish divisions and reverse directional polish divisions exist in a range 80-20/20-80 in area ratio (normal/reverse). COPYRIGHT: (C)2005,JPO&NCIPI
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