Browse Prior Art Database

CONTACT IONOGRAPHY HEAD

IP.com Disclosure Number: IPCOM000027216D
Original Publication Date: 1995-Oct-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 77K

Publishing Venue

Xerox Disclosure Journal

Abstract

Present ionographic writing devices employ fields to drive ions from the print head to a receiver, as for example, in U. S. Patent 4,763,141. These air gap type systems require tight tolerances. An improved ionographic writing device 10 is shown in the Figure that eliminates the previously required tight tolerances between the head and receiver because it operates in contact with a receiver. Here, the first slit-forming set of electrodes 12 and 13 (nearest coronode ll), pumps ions to the lower potential electrode set 18 and 20. The two sets of electrodes are separated by insulators 15 and 16. Either or both of these lower electrodes can be segmented to provide individual addressable elements. Voltage differences applied across the lower slit elements may be used to control ion writing on receiver 30. Insulating layers 19 and 22 of, for example, Teflon, are attached to the lower electrodes and ride on insulating surface 32 of receiver 30. Insulating surface 32 can be made of anodized aluminum. The dielectric surface of the receiver will not charge exchange with the insulating layer of the lower electrode set. Arcing from the lower reference electrodes to the receiver is prevented if a voltage less than the minimum Paschen breakdown (340v) is used. A very thin air bearing could be used instead of actual contact.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 72% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

CONTACT IONOGRAPHY HEAD Proposed Classification Richard F. Bergen U.S. C1.346/158 Robert W. Gundlach Int. C1. Gold 15/06

XEROX DISCLOSURE JOURNAL Vol. 20 No. 5 September/October 1995 433

[This page contains 1 picture or other non-text object]

Page 2 of 2

CONTACT IONOGRAPHY HEAD (Cont'd)

Present ionographic writing devices employ fields to drive ions from the print head to a receiver, as for example, in U. S. Patent 4,763,141. These air gap type systems require tight tolerances.

An improved ionographic writing device 10 is shown in the Figure that eliminates the previously required tight tolerances between the head and receiver because it operates in contact with a receiver. Here, the first slit- forming set of electrodes 12 and 13 (nearest coronode ll), pumps ions to the lower potential electrode set 18 and 20. The two sets of electrodes are separated by insulators 15 and 16. Either or both of these lower electrodes can be segmented to provide individual addressable elements. Voltage differences applied across the lower slit elements may be used to control ion writing on receiver 30. Insulating layers 19 and 22 of, for example, Teflon, are attached to the lower electrodes and ride on insulating surface 32 of receiver 30. Insulating surface 32 can be made of anodized aluminum. The dielectric surface of the receiver will not charge exchange with the insulating layer of the lower electrode set. Arcing from the lower reference electrodes to t...