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SCAVENGELESS DEVELOPMENT WITH ELECTRICALLY REGENERATED DONOR BELT

IP.com Disclosure Number: IPCOM000027174D
Original Publication Date: 1995-Aug-31
Included in the Prior Art Database: 2004-Apr-07

Publishing Venue

Xerox Disclosure Journal

Abstract

Well known in the development of electrostatic latent images in xerographic printers are the use of scavengeless development processes, for example, those described in US-A-4,868,600 to Hays et al., issued Sep. 19, 1989, US-A- 5,010,367 to Hays, issued Apr. 23, 1991, US-A-5,128,723 to Bolte et al, issued Jul. 7, 1992, US-A-5,144,371 to Hays, issued Sep. 1, 1992. Generally, AC biased wires or electrodes positioned over the toner covered donor element causes the charged toner particles to "jump" therefrom, forming a powder cloud in the development zone. In scavengeless type development systems employing a donor belt and AC biased electrodes located behind the belt, for instance, those described by Schmidlin in US-A-5,276,466, issued Jan. 4,1994, there exists a problem of residual charge remaining on the conductive donor belt following development. To correct this problem, it is proposed that an insulating belt be employed with a conductive roll maintained at ground potential to contact the insulating donor belt as the last step of the development process in order to deplete any residual charge thereon.