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Differential Paper-Skew Detector Independent of X or Y Velocity

IP.com Disclosure Number: IPCOM000046308D
Original Publication Date: 1983-Jul-01
Included in the Prior Art Database: 2005-Feb-07

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Barteck, JC Richards, LD [+details]


Paper-feed misalignment can be accurately detected by reading the difference in signals from two photodiodes that are arranged geometrically transverse to the paper path. A typical geometric arrangement is illustrated in Fig. l.