In the case where charge up has occurred in the pattern 171, a tail 175 appears in the downstream of {HEAD ~ the scan line} in the pattern 171 as {TAIL ~ the digital image} in each of the reciprocating scan lines 173 and 174 
In the case where charge up has occurred in the pattern 171 , a tail 175 appears in the downstream of { HEAD ~ the scan line } in the pattern 171 as { TAIL ~ the digital image } in each of the reciprocating scan lines 173 and 174
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH