Patent ID: 6719286
Filing Date: 2004-04-13
Classification: B65H

Abstract:
A sheet conveying apparatus comprising a pair of conveying rollers for pinching and conveying a sheet by a driving roller having roughness provided on a surface thereof and a pinch roller coming in pressure contact with the driving roller and driven to rotate, wherein the pinch roller is formed of resin of which a main raw material is polyacetal, wherein the pinch roller is formed with a die, the die is parted in a longitudinal direction so that a parting line does not appear on a circumference of the pinch roller, an inside diameter of a portion of the die for forming the end portion near a core side of the pinch roller is smaller than an inside diameter of a portion of the die for forming the substantial center portion of the pinch roller, and is set in such a manner that scoring is not caused on the pinch roller by the die during a mold releasing operation in expectation of some percentage for shrinkage of the substantial center portion of the pinch roller during resin filling-cooling-releasing processes.