Patent ID: 6407826
Filing Date: 2002-06-18
Classification: G03G

Abstract:
An image forming apparatus comprising:image forming means for forming an image on a sheet; a sheet sensor for detecting a sheet; and control means for selectively executing a first mode in which a presence/absence of a sheet can be quickly detected and a second mode in which a presence/absence of a sheet cannot be quickly detected, wherein said control means comprises discriminating means for performing a discrimination of whether or not a sheet is at said sheet sensor in accordance with a signal from said sheet sensor, and wherein in the first mode, said sheet sensor is driven continuously and said discriminating means performs the discrimination periodically with a short interval, and in the second mode, said sheet sensor is driven intermittently and said discriminating means performs the discrimination during a time said sheet sensor is being driven and does not perform the discrimination during a time said sheet sensor is not being driven.