wherein a rotational speed of {HEAD ~ said first image bearing member} at {TAIL ~ said transfer position} is different from that of said intermediate transfer member during the back transfer operation 
at
wherein a rotational speed of { HEAD ~ said first image bearing member } at { TAIL ~ said transfer position } is different from that of said intermediate transfer member during the back transfer operation
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH