Incremental printing of symbolic information – Electric marking apparatus or processes – Electrostatic
Patent
1996-07-16
1998-08-11
Beatty, Robert
Incremental printing of symbolic information
Electric marking apparatus or processes
Electrostatic
347158, B41J 2385
Patent
active
057934010
ABSTRACT:
An electro-photograph device having two counter-rotating rolls (2, 5). Roll (2) transports a toner layer, controlled by a blade (4), to a printing zone (6). A voltage is applied between rolls (2, 5), in order to transfer low-adhesion toner from roll (2) to roll (5). Consequently, only toner particles having a specified minimum adhesion reach the printing zone (6). Thus, better print quality is obtained and the expenditure for drive electronics is reduced. A multitude of electrodes (18) are located on the side of a paper carrier facing away from the roll (2). A switching device (19) selectively applies the electrodes with a bias with is related to the biases applied to the rolls (2,5).
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Beatty Robert
Pelikan Produktions AG
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