Abstract: An apparatus is provided in a printer to prevent wrapping of the paper web onto the printer's fixing roller which fixes the toner particles onto the paper web. The apparatus includes a sensor to monitor the speed and moving direction of the web at the output of the fixing station. The sensor is connected to a controller which operates to halt the operation of the fixing station or the printer when the sensor senses a reversal of the moving direction of the web. The controller may average the web moving speed and compare the average speed to a predetermined speed for halting printer operation if the average speed traverses the predetermined speed.

Abstract: An arrangement for the mechanical coupling of physical units, such as, for example, of a printing assembly (15) of an electrophotographic printer or copier, to further physical units (23, 24) in axially parallel orientation with respect to the transport path of a recording carrier (12) includes a basic unit (28) containing especially the printing assembly (15) coupled in an articulated manner to a carrier (32), oriented vertically with respect to a machine frame (1), via a crossmember (30) which consists especially of two individual crossmember elements (301, 302). The physical units (23 or 24) to be arranged axially parallel with respect to the basic unit are then themselves articulated on the carrier (32) in paired receptacles (for example C1, C2).