| 摘要 |
<p>PURPOSE:To prevent the double delivery of sheet materials by providing facing rollers having different coefficients of friction with sheet materials between the first and third rollers and controlling the driving timing of the first and second rollers by the detecting means for the sheet material provided in the vicinity of the second roller. CONSTITUTION:When two sheets of paper are delivered doubly and the second rollers bit them, one sheet in contact with the roller 5a having a coefficient of friction greater than that of another proceeds first and the roller 5b having a smaller coefficient of friction comes to a stop. Accordingly, the sheets 2 are separated and only the paper on the side of the roller 5a is delivered to the rollers 7. At this time point, the paper forms a loop at just before the roller 7 not rotating and stand by. Then, the paper is delivered to the roller 7 which rotates in time synchronism with the drum 1. On the other hand, the remaining paper 2 within the rollers 5 is detected by a microswitch 6, and the driving first rollers 4 is temporarily stopped to be well timed therewith. in this manner, the double delivery of sheets of paper is strictly prevented.</p> |
