Browse Prior Art Database

CONTROL OF STATIC CHARGE ON ELECTROGRAPHIC STYLUS HEADS

IP.com Disclosure Number: IPCOM000024497D
Original Publication Date: 1980-Oct-31
Included in the Prior Art Database: 2004-Apr-02

Publishing Venue

Xerox Disclosure Journal

Abstract

In electrographic printers, it is common to use one or more metallic styli embedded in an insulating material as a printing "head". In such heads which are operated out of contact with a dielectric receiving sheet, the surface of the insulating material is usually configured so as to be coplanar with the active surfaces of the printing styli. During the operation of these printing heads, electrostatic charges deposit on the insulating surface adjacent to the styli ends, and the presence of these charges interferes with normal operation by distorting the discharge, thereby leading to "flaring" or spreading of the charge pattern formed on the nearby dielectric receiving surface.