| 摘要 |
<p>PURPOSE:To make the performance of paper feeding excellent, by making part of a reversal roller a low friction portion, and adding load on a lower stream transport means through a transported paper sheet, and restraining giving a bad effect. CONSTITUTION:When the force of push-pressing between a paper feed roller 7 and a reversal roller 8 is N and the force of returning operated on the outer periphery of the reversal roller 8 by means of a torque limiter 9 is F, a friction coefficient muA at part 8a of the surface of the reversal roller 8 is muA<F/N. Load added on a lower stream transport means 12 through a transported paper sheet is reduced by the existence of such a low friction coefficient portion 8a, and effect on the transport means 12 by means of load is restrained.</p> |
