An operation of mounting and removing {HEAD ~ conveyance rollers} disposed in a pair is facilitated and a proper nipping force can be imparted between {TAIL ~ a conveyance roller pair} 
An operation of mounting and removing { HEAD ~ conveyance rollers } disposed in a pair is facilitated and a proper nipping force can be imparted between { TAIL ~ a conveyance roller pair }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL