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IONOGRAPHIC PRINTER

IP.com Disclosure Number: IPCOM000026436D
Original Publication Date: 1992-Feb-29
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 126K

Publishing Venue

Xerox Disclosure Journal

Abstract

One of the major drawbacks with an ionographic printing system is the latent image defects that are caused by charge spreading or blooming, on the electroreceptor. It has been shown that the image blooming can be significantly reduced by reducing the image potential of the electrostatic image on the receiver or electroreceptor. When this is done, however, it becomes dificult or impossible to develop the electrostatic image sufficiently with standard two component development systems.

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XEROX DISCLOSURE JOURNAL

IONOGRAPHIC PRINTER

Lawrence M. Hart

Proposed Classification
U.S. C1.3461159 Int. C1. G03g 15/01

20 \

XEROX DISCLOSURE JOURNAL - Vol. 17, No. 1 January/February 1992 1

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IONOGRAPHIC PRINTER(Cont'd)

One of the major drawbacks with an ionographic printing system is the latent image defects that are caused by charge spreading or blooming, on the electroreceptor. It has been shown that the image blooming can be significantly reduced by reducing the image potential of the electrostatic image on the receiver or electroreceptor. When this is done, however, it becomes dificult or impossible to develop the electrostatic image sufficiently with standard two component development systems.

A single component development system such as a magnetic touchdown development system (MTTD) will develop the low voltage electrostatic images sufficiently. The development system also offers all of the advantages of most single component systems such as the elimination of a toner charge control system and the elimination of the developer cross mixing system. This system eliminates the problems of developer failure and changing triboelectric characteristics. The main problem with the MTTD development system is that images cannot be electrostatically transferred to paper because of the conductivity of the toner. The MTTD development system lends itself very well to a pressure roll transfer system. Presently there are some encapsulated toners that work well in MTTD development systems and are available. These toners allow a transfix roll to pressure transfer and fix the images on plain paper in one step, thus enabling the use of an MTTD system. Unfortunately, the organic electroreceptor proposed for use by most io...