| 摘要 |
<p>PURPOSE:To eliminate any blocking of stacking the bottom paper sheet and accurately stack the bottom paper sheet at a prescribed point by controlling air adsorption quantity by a valve means till a prescribed timing after the first paper sheet is stacked. CONSTITUTION:Copying paper sheets after fixing are stacked on a paper sheet mount in a paper sheet refeeding device in such a state as put their back downward by an inverting roller. When copying action on the back of a transcription paper sheet is started, a plurality of the transcription paper sheets are fed to a photoconductor drum from the bottom transcription paper sheets in the ascending order by adsorption of an adsorption conveyance belt 52 and air jet from an air nozzle. In this case, a hollow-box type adsorption duct 527 is arranged between a drive roller and a driven roller for packaging the belt 52 in its rolled state. An adsorption fan 528 is made to start in such a state that air adsorption quantity is controlled by a valve means at a prescribed timing before the bottom paper sheet is stacked and after the bottom paper sheet is stacked, the air adsorption quantity is controlled to be increased.</p> |
