Patent ID: 7123868

Claim:
An electrophotographic printing device with a toner developer unit ( 10 ), an exposure device ( 11 ), a developer drum ( 15 ), a photo-conductor ( 20 ), a transfer unit ( 22 ) and a grounded charging device ( 16 , 18 ), wherein a substrate ( 30 ) to be imprinted is moved, lying on a transport device, beyond a transfer zone ( 24 ) of the transfer unit ( 22 ) and a toner image of the transfer unit ( 22 ) is transferred to the substrate ( 30 ), the electrophotographic printing device comprising: during the printing process arranging the substrate ( 30 ) on a non-grounded, electrically conductive layer ( 31 ) which is insulated against the grounded transport device ( 25 ) by an insulator ( 17 , 17 . 1 . . . 17 .n, 17 . 3 ) extending over the charging device ( 16 , 17 ) located above the substrate ( 30 ) and a dimension, oriented in a transport direction, of the substrate ( 30 ) to be imprinted.