The electrode pad die baiasudo electric charge roller null insulating substrate which improves electric charge uniformity with post

摘要

PROBLEM TO BE SOLVED: To provide a BCR system which has superior charge uniformity and less wear, and which is more inexpensive.;SOLUTION: A biased charge roller (BCR) 1 is constituted, by arranging many electrodes on an insulating substrate layer 10 and covering them with a semiconductor layer 9. The electrodes 8 are applied with bias voltages VP_PRE-NIP and V_POST-NIP from power sources 14 and 15 so that, for example, an electrode group belonging to a pre-nip region 6 (and an in-nip region 3) and an electrode group belonging to a post-nip region 7 are biased with the different bias voltage. Forms of electric charges to a photoreceptor surface 2 in the in-nip region 3, the pre-nip region 6, and the post-nip region 7 are optimized by the arrangement and sizes and shapes of the electrode, voltage settings, etc. Electrode 8 may be arranged inside the insulating substrate layer 10 and inside the semiconductor layer 9.;COPYRIGHT: (C)2006,JPO&NCIPI