A cleaning blade is pressed against the outer periphery of the sleeve for pressing {HEAD ~ the drive roller} via {TAIL ~ the sleeve} 
via
A cleaning blade is pressed against the outer periphery of the sleeve for pressing { HEAD ~ the drive roller } via { TAIL ~ the sleeve }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL