| 摘要 |
PURPOSE:To prevent conveyance timing delay and the like, in a copying machine and the like in which a sheet is conveyed between paired rollers and then conveyed again, by providing rollers, in which an external diameter is larger than an external diameter of the paired rollers and a friction coefficient is larger than of the paired rotors, rotatably to the paired rollers. CONSTITUTION:Timing rollers 9, 10 are mounted respectively to shafts 11, 12, and lower idling rollers 13, of equal diameter to the lower timing roller 10, are rotatably fitted to the shaft 12 through bearings 14, while upper timing rollers 15, of external diameter larger than of the timing roller 9 and internal diameter larger than of the shaft 11, are rotatably fitted to the shaft 11 and contacted correspondingly to the lower idling rollers 13. In this constitution, a sheet, fed along a guide, is adapted with the point end to a surface of the upper idling roller 15, and guided to a nip part of the upper and lower timing rollers 9, 10 while sliding on the surface. Accordingly, the sheet can be surely applied to the nip part of the paired rollers 9, 10, and timing delay can be prevented. |
