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