Image Registration Technique
Original Publication Date: 1984-Jan-01
Included in the Prior Art Database: 2005-Feb-02
This article describes an apparatus and technique for registering transfer sheets on the photoconductor (PC) belt of a belt-type copier. An encoding device is mounted to the shaft of the roller which drives the PC belt. This encoder drives a counter which is initialized by a sync-mark pulse. The sync-mark pulse is obtained from a hole sensor associated with the belt. Following initialization of the counter, a count is accumulated. The count is representative of the distance between the imaging station and the transfer station. As soon as this count is accumulated, the image on the belt is transferred to the transfer sheet and a pulse (generated from the hole sensor) resets the counter. The cycle then repeats for another imaging panel. Fig. 1 shows one of a plurality of configurations for a belt-type copier.