Patent ID: 7530659
Filing Date: 2009-05-12
Classification: B41J

Abstract:
1. An apparatus for printing, comprising: a print medium advancement mechanism; at least one displacement encoder having an encoder wheel of a circumference to provide a signal representing advancement of print medium by the print medium advancement mechanism; at least two imager units separated by an integer multiple of the circumference of the encoder wheel of the displacement encoder; and a processor configured to stitch output from the at least two imager units using the signal, wherein the at least one displacement encoder includes a first displacement encoder associated with and proximate to a first imager unit, a second displacement encoder associated with and proximate to a third imager unit, and a third displacement encoder associated with and proximate to a second imager unit, wherein the processor is configured to switch between the first displacement encoder for printing using a first pair of imager units including the first imager unit and the second imager unit, and the third displacement encoder for printing using a second pair of imager units including the second imager unit and the third imager unit.