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    • 34. 发明专利
    • Sheet feeder and image forming apparatus
    • 纸张进纸器和图像形成装置
    • JP2003312903A
    • 2003-11-06
    • JP2002118816
    • 2002-04-22
    • Canon Incキヤノン株式会社
    • FUKUSAKA TETSUO
    • B65H5/06B65H5/24B65H9/14
    • PROBLEM TO BE SOLVED: To cause a sheet feeding mechanism of an image forming apparatus to feed sheets at high speeds using minus paper-to-paper spacing control.
      SOLUTION: This sheet feeder includes a pair of first feed rollers 19 which performs feeding in such a way that the rear end of leading transfer paper 201 fed by a feed roller 17 and the front end of another transfer paper 202 following the leading transfer paper 201 are made to overlap by a predetermined amount; a pair of second feed rollers 20 for feeding the transfer paper fed by the pair of first feed rollers 19; and a pair of register rollers 21 for feeding the transfer paper in such a way that the transfer paper, fed by the pair of second feed rollers 20, is in alignment with an image to be formed on a photoreceptor 2. The image feed velocity V
      p of the photoreceptor 2, the sheet feed velocity V
      1 of the pair of first feed rollers 19, the sheet feed velocity V
      2 of the pair of second feed rollers 20, and the sheet feed velocity V
      r of the pair of register rollers 21 assume the relationship: V
      p =V
      r >V
      2 =V
      1 .
      COPYRIGHT: (C)2004,JPO
    • 要解决的问题:为了使图像形成装置的片材进给机构使用减去纸对间距控制以高速进给纸张。

      解决方案:该片材进给器包括一对第一进给辊19,其以这样的方式进行进给,使得由进给辊17供给的引导转印纸201的后端和另一转印纸202的前端沿着前导 使转印纸201重叠预定量; 用于供给由一对第一进给辊19供给的转印纸的一对第二进给辊20; 以及一对定位辊21,用于供给转印纸,使得由一对第二进给辊20供给的转印纸与要形成在感光体2上的图像对准。图像进给速度V 感光体2的 p ,一对第一输送辊19的送纸速度V SB> 1 ,送纸速度V SB> 2 一对定位辊21的一对第二进给辊20和送纸速度V SB 呈现出以下关系:V SB> = V r > V 2 = V 1 。 版权所有(C)2004,JPO