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