Bias charge roller having a continuous raised pattern on the outer surface

摘要

A bias charge roller includes an electrically conductive core. An outer layer is axially supported on the core. The outer layer is either conductive or semi-conductive. The bias charge roller further includes a continuous raised pattern on the outer surface of the outer layer. The continuous raised pattern is configured to contact a charge-retentive surface of an electrophotographic imaging member so as to charge the charge-retentive surface. The bias charge roller can be employed in an image forming apparatus.

主权项

1. A bias charge roller comprising:
an electrically conductive core; an outer layer axially supported on the core, wherein the outer layer is either conductive or semiconductive, the outer layer having an outer surface with a length in a direction parallel with a longitudinal axis of the bias charge roller; and an electrically conductive or semiconductive, continuous raised pattern on the outer surface of the outer layer, wherein the continuous raised pattern is configured to contact a charge-retentive surface of an electrophotographic imaging member so as to charge the charge-retentive surface, the continuous raised pattern extending across at least 70% of the length of the outer surface of the outer layer.