Printing unit with an electrostatic printing aid

Details Printing unit with an electrostatic printing aid Printing unit with an electrostatic printing aid

B - Operations, Transporting

41

F

101/41

B41F 17/00 (2006.01) B41F 9/00 (2006.01) B41F 13/18 (2006.01)

Patent

CA 1212863

Abstract The printing unit (1) operating with an electro- static printing aid has an inductor device (7) for trans- mitting an electrostatic charge to an outer-shell layer (5) of a back-up cylinder (4). The inductor device is provided on one end face (14) of the back-up cylinder and engages over this end face in the manner of a lid. A con- tinuous annular air gap (15) is located between the end face and the inductor device. Inductor electrodes (9) serve for transmitting the electrostatic charge to the outer-shell layer in a contactless manner and are arran- ged, concealed against outside access, on the inner face of the inductor device and are aligned by means of their electrode tips with an end-face edge (10) of the outer- shell layer (5). So that no impurities can penetrate into the air gap, it is sealed off or constantly scavenged by compressed air. (Figure 2)

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