A method and apparatus for correcting skew of {HEAD ~ an advancing sheet} responsive to {TAIL ~ the detection} of one or the other of aligned fiducial marks located near each of the opposite side edges adjacent the sheet leading edge 
responsive to
A method and apparatus for correcting skew of { HEAD ~ an advancing sheet } responsive to { TAIL ~ the detection } of one or the other of aligned fiducial marks located near each of the opposite side edges adjacent the sheet leading edge
OTH OTH OTH OTH OTH OTH OTH OTH HEAD 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 OTH OTH OTH OTH OTH OTH OTH