A printing device with an image recording traeger and a plurality of along the revolution circumference of the image recording tra eger image forming apparatuses arranged.

摘要

Printing device comprising a cylindrical image-receiving support (1) and a number of image-forming stations (4,5,6) which are disposed along the rotational path of the image-receiving support and which each generate a separation image of the required image and transfer said separation image to the image-receiving support (1) in an image-transfer zone and each comprise a rotatable cylindrical image-registration element (7) and imaging means (8) to form the separation image on the image-registration element (7). As considered along the circumference of the image-registration element (7) and in the direction of movement thereof, there is an equal distance in each image-forming station (4,5,6) between the place where the separation image is formed on the image-registration element (7) and the centre of the image-transfer zone in which said separation image is transferred to the image-receiving support (1). A control means (28,10) derive the start time of the image registration in each image-forming station (4,5,6) from the position of the image-receiving support (1) with respect to that image-forming station, as a result of which the separation images are transferred in correct register to the image-receiving support (1). Another control means controls the temperature of each image-registration element.