FRONT-TO-BACK REGISTRATION OF PRINTED CONTENT

摘要

Examples disclosed herein relate to front-to-back registration of a printed content onto a print medium. In one example, a trigger signal generated by a sensor upon detection of a trigger mark on a first surface of a print medium is received. The trigger mark includes a leading edge and a trailing edge, wherein the leading edge and the trailing edge are non-parallel. Based on the trigger signal, a distance of the trailing edge from a point on the leading edge is determined. Once determined, a measure of lateral wander of the print medium with respect to the print path is obtained. The measure of the lateral wander is determined by comparing the distance between the leading edge and the trailing edge, with a threshold value.

主权项

1. A method for providing front-to-back registration of printed content on a web-fed print medium, the method comprising:
printing, on a first surface of the print medium advancing in a print path direction, at least a series of trigger marks, wherein each of the trigger marks include a leading edge and a trailing edge which are not parallel to each other; detecting the leading edge and the trailing edge of each of the trigger mark, through a sensor; obtaining, for each of the trigger mark, a distance between the leading edge and the trailing edge by the sensor, based on the detecting; and compensating lateral wandering of the print media with respect to the print path direction based on a variation in the distance between the leading edge and the trailing edge for each of the trigger marks.