Browse Prior Art Database

COROTRONS FOR CHARGE REDUCTION AT TRANSFER ROLL

IP.com Disclosure Number: IPCOM000023076D
Original Publication Date: 1976-Aug-31
Included in the Prior Art Database: 2004-Mar-27

Publishing Venue

Xerox Disclosure Journal

Abstract

In an electrophotographic printing machine, frequently residual charges on a sheet of support material 10 prevent the stripping thereof from transfer roll 12 after a plurality of toner powder images have been transferred thereto from photoconductive drum 14, Corona generating device 16 is located after transfer roll 12 so as to remove any charge on the sheet of support material 10 during the stripping process. Corona generating device 16 comprises an elongated shield and a coronode wire extending there~ under. Preferably, the operating voltage may range from about 3,500 to about 4,800 volts, with the nominal being about 4,500 volts RNS AC. The current may range from 80 to 400 microainps with the nominal being about 220 micro~ ampiers. The nominal spacing from the coronode wire to support material 10 is about 1/2 an inch. The coronode shield is grounded, although, it may be electrically biased if required.