Browse Prior Art Database

THERMAL INK JET PRINTHEAD/SYSTEMS

IP.com Disclosure Number: IPCOM000026307D
Original Publication Date: 1991-Apr-30
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 98K

Publishing Venue

Xerox Disclosure Journal

Abstract

A combination air knifelprint head arrangement for use in thermal ink jet (TIJ) printers is disclosed. TIJ technology requires that: the paper not contact the print head after imaging; quick drying of the inked image by evaporation or absorption of the ink; the printhead is maintained at a reasonably constant temperature range; the printhead be periodically cleaned to remove paper fibers, excess ink or other residues: and the printhead is easily primed and purged.

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XEROX DISCLOSURE JOURNAL

THERMAL INK JET Proposed Classification PRINTHEAD/SY STEMS U.S. Cl.3461075 Phillip L. Harrison Int. C1. Gold 15/18

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XEROX DISCLOSURE JOURNAL - Vol. 16, No. 2 MarcldApril1991 95

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THERMAL INK JET PRINTHEAD/SYSTEMS(Cont'd)

A combination air knifelprint head arrangement for use in thermal ink jet (TIJ) printers is disclosed. TIJ technology requires that: the paper not contact the print head after imaging; quick drying of the inked image by evaporation or absorption of the ink; the printhead is maintained at a reasonably constant temperature range; the printhead be periodically cleaned to remove paper fibers, excess ink or other residues: and the printhead is easily primed and purged.

Placement of one or more air knives 1 in close proximity to the print head 2 conveniently achieves the above requirements as shown in Figures 1-3. Air 3 may be routed through a heat.sinWmanifold arrangement on one or more sides of the print head with enough velocity to keep a copy sheet 4 from contacting the printhead. Air flow can assist heat transfer from the heat sink and thereby help stabilize the print head temperature. The air flow stream may also assists in the drying of the ink by absorption and evaporation. Since the air knife(s> and the print head are integral, face cleaning of printhead may be accomplished between every print interval if desired. Si...