| US 7,500,669 B2 | ||
| Registration of tab media | ||
| Barry Paul Mandel, Fairport, N.Y. (US) | ||
| Assigned to Xerox Corporation, Norwalk, Conn. (US) | ||
| Filed on Apr. 13, 2006, as Appl. No. 11/403,786. | ||
| Prior Publication US 2007/0257423 A1, Nov. 08, 2007 | ||
| Int. Cl. B65H 7/02 (2006.01); B65H 5/00 (2006.01) | ||
| U.S. Cl. 271—227 [271/228; 271/1] | 20 Claims |
| 1. A printing system, comprising:
a media registration transport for transporting a media sheet along a path;
a sensing system including a plurality of sensors positioned substantially in line and orthogonal to the feed direction of
said sheet path for detecting a leading edge of the media sheet;
a control system for detecting signals at the times when each of said plurality of sensors are occluded;
said control system including a control algorithm comparing each one of said sensor signals with every other of said sensor
signals forming a series of paired comparisons;
said control algorithm identifies at least one paired comparison of sensor signals having inconsistent readings with the other
paired comparisons of sensor signals;
said control algorithm determines presence of a tab on said leading edge based on said inconsistent at least one paired comparison
of sensor signal readings;
said control algorithm removes said at least one paired comparison of inconsistent sensor signals to determine a skew of said
leading edge based on said other paired comparisons; and,
said media registration transport performs a deskew operation on said media sheet based on said skew of said leading edge.
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