Patent ID: 7284486

Claim:
A device for controlling a position of a lateral edge of a continuous web of a recording medium in a printer or copier, comprising: a web retracting device operable to exert a restraining force on the web; an actuator mounted downstream of said web retracting device as viewed in a transport direction of the continuous web during normal printing operation, said actuator being operable to adjust a position of the lateral edge of the continuous web; a web drive disposed downstream of said actuator which advances the continuous web in the transport direction against the restraining force of said retracting device; at least one transfer printing station downstream of said web drive which prints toner images on the continuous web; and a take-off device downstream of said at least one transfer printing station which further conveys the continuous web for further processing; a sensor in a region of said actuator which is operable to sense an actual position of the lateral edge of the continuous web and provide an actual signal; a control device connected to compare the actual signal of said sensor with a desired signal corresponding to a desired position of the lateral edge of the continuous web and in case of a deviation to drive said actuator which changes a position of the lateral edge.