Browse Prior Art Database

CORONA POWERED BIASED TRANSFER ROLLER

IP.com Disclosure Number: IPCOM000026863D
Original Publication Date: 1994-Feb-28
Included in the Prior Art Database: 2004-Apr-06

Publishing Venue

Xerox Disclosure Journal

Abstract

Electrostatic transfer of powder images from a photoreceptor 12 to a copy sheet 14 requires that the two be in close proximity to one another to avoid blurred images, caused by gap transfer and image deletions within the transfer nip, 16. To insure contact during the transfer process within nip 16, the 9000 Series of Xerox* copiers uses a bias transfer roller, 18 that forces the copy sheet to conform to the photoreceptor within the nip or transfer zone. However, the roll must meet complex requirements relative to its electrical properties, wherein the resistivity (p) and the unit area capacitance of the roll coating must: