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SELF-SEALING INK JET DEFLECTION PLATE CONNECTOR

IP.com Disclosure Number: IPCOM000025256D
Original Publication Date: 1984-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 4 page(s) / 153K

Publishing Venue

Xerox Disclosure Journal

Abstract

Deflection plate assemblies in ink jet devices of the continuous stream type suffer from the problem of electrical shorting between adjacent, confronting plates as well as through channels in which the plates are mounted, when the channels and plates become wetted by the conductive ink. A deflection plate assembly immune to this difficulty is depicted in Figures la and 2.

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Page 1 of 4

XEROX DISCLOSURE JOURNAL

SELF-SEALING INK JET DEFLECTION PLATE CONNECTOR
Joel M. Pollack
Jeffery E. Tobin

12 a

Proposed Classification
U.S. CI. 346/75 Int. C1. Gold 15/18

F/G fu

L30 I

II I

FIG Ib

Volume 9 Number 2 March/April 1984 131

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

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SELF-SEALING INK JET DEFLECTION PLATE CONNECTOR (Cont'd)

FIG 2

132 XEROX DISCLOSURE JOURNAL

Volume 9 Number 2 h/larch/April 1984

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

Page 3 of 4

SELF-SEALING INK JET DEFLECTION PLATE CONNECTOR (Cont'd)

Deflection plate assemblies in ink jet devices of the continuous stream type suffer from the problem of electrical shorting between adjacent, confronting plates as well as through channels in which the plates are mounted, when the channels and plates become wetted by the conductive ink. A deflection plate assembly immune to this difficulty is depicted in Figures la and 2.

Figure la is a cross-sectional diagram showing a pair of deflection plates 12, 14 mounted on opposite sides of a flat structure 16. The structure 16 is mounted in a channel 18 of support base 20. Figure 2 shows a perspective schematic of the support base 20 having a flexible, polyimide circuit board 22 shaped to conform to the surface of the support base and channels therein. The circuit board has an insulated circuit 24 thereon which is exposed only at locations 26 at the bottom of the channels. This flexible circuit board is commercially available under the trade name Kapton. Referring to Figure la, the deflection plates 12, 14 are constructed of gold-plated copper cladding 12a, 14a which fold underneath the bottom edge of the flat structure 14. The gold-plated copper cladding is separated from each other by space 30 on the bottom of the flat structure, so that they remain electrically isolated from each other. The lowermost surfaces of the deflection plates, except for part of the bottom edges 15, should be protected with an insulative and chemical resistive layer 32 to prevent shorting between adjacent confronting plates because of severe collection and puddling by the ink. The flat structure 16 holding the deflection plates 12, 14 is made of an insulative material such as epoxy or polyimide. The flat structure with the deflection plates is inserted into a channel 18 with a metal-filled polymer gasket 34. interposed ~ between the bottom of the channel and the bottom of the flat structure. Such a gasket is sold by Chomerics, Inc. under the trade name of Chonector. Compres- sing this ga...