Photocopying – Contact printing – Light boxes
Patent
1995-09-01
1996-10-15
Pendegrass, Joan H.
Photocopying
Contact printing
Light boxes
118653, 430120, G03G 1508
Patent
active
055659683
ABSTRACT:
A developing roller comprising a conductive layer formed around a shaft carries a non-magnetic one-component developer on its outer surface to form a thin film of the developer and contacts a photoconductor drum having an electrostatic latent image borne on its surface whereby the latent image is developed to form a toner image. In one embodiment, the surface of the conductive layer has a DIN 4776 core roughness depth Rk of 0.5-3.5 .mu.m in a circumferential direction of the roller, and the ratio of circumferential Rk to axial Rk is greater than 1.0. In another embodiment, the surface of the conductive layer is provided with microscopic ridges and recesses which are alternately disposed in a rotational direction to define wavy streaks having a longitudinal direction substantially aligned with an axial direction of the roller.
Kawagoe Takahiro
Mori Yuichiro
Okada Tokuo
Sawa Eiji
Takagi Koji
Bridgestone Corporation
Pendegrass Joan H.
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