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DIAMOND-LIKE CARBON AS AN OVERCOAT FOR THERMAL INK JET HEATER DRUMS

IP.com Disclosure Number: IPCOM000027676D
Original Publication Date: 1998-Oct-31
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 84K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a thermal ink jet system, a heater roll or drum is used to dry the ink after transfer of the ink to a copy substrate such as paper. The operation of a heater roll is similar to that of a fuser roll in that a coated metal roll is heated by a quartz lamp to an internal temperature of about 13OoC, and the roll is used to fix ink or toner to the paper.

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XEROX DISCLOSURE JOURNAL

DIAMOND-LIKE CARBON AS AN OVERCOAT FOR THERMAL INK JET HEATER DRUMS
Ann M. Kazakos
Michael J. Duggan

Proposed Classification
U. S. CL 347/001 Int. C1. B41j 02/01

In a thermal ink jet system, a heater roll or drum is used to dry the ink after transfer of the ink to a copy substrate such as paper. The operation of a heater roll is similar to that of a fuser roll in that a coated metal roll is heated by a quartz lamp to an internal temperature of about 13OoC, and the roll is used to fix ink or toner to the paper.

Two critical functions of an outer coating of a heater roll used in thermal ink jet ink drying include: 1) that the outer layer provide an insulating layer over a metal core to insure that the charges provided by the metal substrate through the coating layer will remain to hold the copy substrate, and 2) that the outer layer enable sufficient heat transfer, generated by the quartz lamp, to the surface of the coating to dry the ink. The coating must also provide wear resistance, and must be chemically compatible with the ink. The roll should preferably have a breakdown voltage of greater than 1300 volts.

Currently, heated rollers comprise a metal core, such as an aluminum core, having an outer insulating film of a material such as polyimide (e.g., MYLAR@ or KAPTOP) positioned or wrapped around the metal core. Diamond-Like Carbon (DLC) coatings
(e.g., those made by Diamonex of Mentown, PA, and Norton, Inc. of MA) can be used in place...