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Void Displacement Fast Drying Process for Ink Jet Printer Ink

IP.com Disclosure Number: IPCOM000084083D
Original Publication Date: 1975-Sep-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Edds, KE: AUTHOR [+4]

Abstract

Fast "drying" of ink on paper without additives to the ink or heat lamps, blowers, etc. in a printing machine for water-based jet inks is insured, through use of a partial vacuum to induce ink flow into paper. Prior formulation of solvents, penetrants, and heated air to affect quick drying is eliminated.

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Void Displacement Fast Drying Process for Ink Jet Printer Ink

Fast "drying" of ink on paper without additives to the ink or heat lamps, blowers, etc. in a printing machine for water-based jet inks is insured, through use of a partial vacuum to induce ink flow into paper. Prior formulation of solvents, penetrants, and heated air to affect quick drying is eliminated.

Jet printing inks are almost exclusively water based for various conductive, solvent, and dynamic stream stability characteristics. This presents problems such as "drying" on paper substrates due to the droplet surface tension, permeability differences in papers - due also to formulations containing high amounts of water and humid atmospheric environs. This drying problem or penetration is compounded as the handling speed increases. Mechanical feed devices (example: paper bails) contact the freshly printed paper and smear the ink remaining on the paper surface.

The penetration of ink droplets into the paper via air evacuation of the void volume of the cellulostic or paper fibers is accomplished, by applying a partial vacuum to the back side of the paper opposite the printer head. This process of evacuating the air from the void volume overcomes the forces of the droplet surface tension and the interfacial tension between the ink and the paper. This insures faster ink drying.

This application of a partial vacuum, in addition, contributes printer independence or environment for repeatable results. A typi...