Patent ID: 6606475
Filing Date: 2003-08-12
Classification: G03G

Abstract:
A device for transferring a toner image onto a carrier material, comprising:a toner carrier belt which carries the toner image to be transferred and has a predetermined belt tension; a roller arrangement supporting said toner carrier belt; a belt drive guiding said toner carrier belt through said roller arrangement in a transfer printing area in which the toner image is transfer-printed onto the carrier material; and apparatus for moving said toner carrier belt between a first state close to the carrier material in the transfer printing area to transfer the toner image and a second state arranged at a predetermined distance from the carrier material in the transfer printing area to prevent a transfer of the toner image, a belt tension in said toner carrier belt being essentially the same in said first state and said second state; wherein said roller arrangement includes one single transfer printing roller which is moved back and forth at least approximately perpendicular given a change between said first and second states; said belt drive including a stationary roller with a stationary rotational axis at each of both sides of said transfer printing roller; said roller arrangement including a movable compensation roller arranged between each of said stationary rollers and said transfer printing roller; the respective distance between the rotational axes of the transfer printing roller and the compensation roller and the respective distance between the rotational axes of the compensation roller and the stationary roller remains constant in every state; and diameters of the transfer printing roller, the compensation rollers and of the stationary rollers being of the same size.