Browse Prior Art Database

NEW IONOGRAPHIC PRINTING HEAD DESIGNS

IP.com Disclosure Number: IPCOM000026334D
Original Publication Date: 1991-Jun-30
Included in the Prior Art Database: 2004-Apr-05
Document File: 4 page(s) / 162K

Publishing Venue

Xerox Disclosure Journal

Abstract

Ionography is viewed as a method of generating quality latent electrostatic images without many of the limitations and costs associated with light based xerography. In this disclosure, three specific versions of ion head designs, enabled by the high voltage capabilities of the thin film transistor network, are given as examples. In the three versions shown, resistive nibs and counter-electrodes are used.

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XEROX DISCLOSURE JOURNAL

NEW IONOGRAPHIC PRINTING Proposed Classification HEAD DESIGNS U.S. C1.346/159 Frank C. Genovese Int. C1. Gold 15/06

FIG. I

FIG. 2A

XEROX DISCLOSURE JOURNAL - Vol. 16, No. 3 May/June 1991 165

FIG. 28

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NEW IONOGRAPHIC PRINTING HEAD DESIGNS(Cont'd)

ELECTRODE

FIG. 3A

FIG. 38

166 XEROX DISCLOSURE JOURNAL - Vol. 16, No. 3 May/June 1991

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NEW IONOGRAPHIC PRINTING HEAD DESIGNS(Cont'd)

Ionography is viewed as a method of generating quality latent electrostatic images without many of the limitations and costs associated with light based xerography. In this disclosure, three specific versions of ion head designs, enabled by the high voltage capabilities of the thin film transistor network, are given as examples. In the three versions shown, resistive nibs and counter- electrodes are used.

Referring to Figure 1, version 1, also called the J-head design, uses a plasma gap made by sawing a slit in the assembled head to form the discharge gap which is symmetric about the nib tip. The field line plots strongly suggest that most of the ions will escape from the gap and land on the receiver surface with this geometry.

Referring to Figures 2A and 2B, version 2 is an attempt to minimize modification of an existing high voltage thin film transistor network geometry. The field line plots show that efficiency is considerably less at any orientation, even when an external extractor electrode is emp...