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TEFLON AF THERMAL INK JET FRONT FACE INK REPELLENT

IP.com Disclosure Number: IPCOM000027315D
Original Publication Date: 1996-Apr-30
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 57K

Publishing Venue

Xerox Disclosure Journal

Abstract

To obtain good directional accuracy from thermal ink jet printheads, the front face in the nozzle region should be ink repellent. Directional accuracy of drop placement is needed to print high quality characters and generate artifact free halftone images. One method of making the font face around the nozzles repellent is to apply a thin coat of some low surface energy material such as a silicone resin or a fluorinated silane to the front face.

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XEROX DISCLOSURE JOURNAL

TEFLON AF THERMAL INK JET Proposed Classification FRONT FACE INK REPELLENT
U.S. Reinhold E. Drews C1.3461075
Int. C1. Gold 15/16

To obtain good directional accuracy from thermal ink jet printheads, the front face in the nozzle region should be ink repellent. Directional accuracy of drop placement is needed to print high quality characters and generate artifact free halftone images. One method of making the font face around the nozzles repellent is to apply a thin coat of some low surface energy material such as a silicone resin or a fluorinated silane to the front face.

With some of the new fast drying inks that are currently being used, many of the normally used repellents fail to repel the ink as intended. These new inks contain surface-active substances designed to aid the rapid penetration of the inks into the paper and hence accelerate the drying process. Unfortunately, the very qualities of the ink that promote fast drying also cause the ink to wet the front face. Thus, it is proposed to coat the front face of thermal ink jet nozzles with a 0.01 to 0.1 micron thick epoxy, and an adhesion promoting layer, followed by a solution of TEFLON AF 1600@, to form a durable low energy surface to thereby ensure droplet directionality during the life of the device

XEROX DISCLOSURE JOURNAL - Vol. 21, No. 2 March/April 1996 111

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