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