PURPOSE: To make original insertion resumable at once even if pulling out an original due to an insertion miss, by stopping the detection of a subsequent paper jam by plural original detecting devices installed along a conveying route when reverse operation against the original conveyance is carried out.
CONSTITUTION: When an original is inserted from a guide plate 1 and the tip is detected by sensors PS 0 and PS 1 , an insert roller 10 is pressed to a feed roller 2, while a stopper is retreated, and the original is conveyed. And, when the tip is detected by a sensor PS 2 , paper feeding for sheets of copying paper 30 and 31 is started, but if these sensors PS 0 and PS 1 come into an on-state each, a paper jam detecting timer is started, so that a paper jam is detected by signal timing of each of sensors PS 3 WPS 5 . Here, when the sensor PS 1 comes to off from the on-state in these sensors PS 0 and PS 1 , it is so judged that the original is pulled out of an inserting part, therefore a conveying system is stopped and simultaneously the paper jam detecting timer is cleared. Thus, when the original is pulled out due to an insertion miss, original insertion is made resumable at once.