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Technique For Priming Ink Jet Arrays

IP.com Disclosure Number: IPCOM000048450D
Original Publication Date: 1982-Feb-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Balanson, RD: AUTHOR [+4]

Abstract

An improved priming technique for a drop-on-demand ink jet array which utilizes fluorocarbon solvents is described.

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Technique For Priming Ink Jet Arrays

An improved priming technique for a drop-on-demand ink jet array which utilizes fluorocarbon solvents is described.

The drop-on-demand ink jet head, which may comprise a multi-nozzle array, is connected to a 3-way distribution valve. The valve is then set to position 1 so that the head is connected to a fluid source which contains a fluorocarbon solvent. A pressure source forces the fluorocarbon solvent through the print head to purge all gases from the head.

The valve is then set to position 2 so that a fluid source, which contains distilled water, is connected to the print head. The water purges the solvent from the head since all fluorocarbons are totally insoluble in water. During this phase of the operation, the nozzle exits should be at the low point in the system, due to the high density of the fluorocarbons. Ab The valve is then set to position 3 to select a third fluid source comprising drop-on-demand (DOD) ink. The pressurized ink drives the water from the system and replaces it with the ink. The pressure source is then removed from the system and the print head is then ready for normal drop-on-demand operation under control of the crystal drive electronic circuits.

The preferred fluorocarbon solvents are shown in the following table:
COMPOUND CLASS REPRESENTATIVE STRUCTURE Bromoperfluorocarbons CF(3)(CF(2))(6)Br FLUORINERT* Class of branched TEFLON** structures

FOMBLIN*** (see article)

FREON** e.g., CF(3)CCl(3)

All o...