| 摘要 |
<p>PURPOSE:To eliminate the need for curling at the time of the 1st transfer and to prevent a conveyance system from being load unnecessary by providing a curling means in the 2nd conveyance path (including a both-surface and multiple conveyance path). CONSTITUTION:A couple of curling rollers 25 and 26 are provided in the 2nd conveyance path 31 between a paper refeeding roller couple 23 and a register roller couple 16. This constitution presses both the elastic roller 25 and rigid roller 26 against each other and rotate them as shown in a figure. Paper is curled having a swelling surface on the side of the transfer surface 27 of a photosensitive drum 1 by passing between the rollers. As the concrete constitution of those curling rollers, the external diameter R1 of the elastic roller 25 and th external roller R2 of the rigid roller 26 are best within a range of R1:R2=1:0.6-0.7 and their mutual pressing force is preferably 3-5kg.</p> |
