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Browse Prior Art Database

CONTINUOUS STATIC MIX PROCESS FOR PREPARING TIJ INKS

IP.com Disclosure Number: IPCOM000027239D
Original Publication Date: 1995-Dec-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 71K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is an apparatus and continuous process for the preparation of Thermal Ink Jet (TIJ) inks. The apparatus comprises several metering pumps, a static mixer, and a 10 inch cartridge filter. The pumps are set to deliver known quantities of each starting material, such as water, glycols, pigment suspensions or dye solutions, humectant, and the like. Pulse dampeners are used to reduce pump induced pulsation of each liquid stream. All starting materials enter the static mixer at the same point and at the same time. Starting materials are mixed in the static mixer to form the T.I.J. ink. A back pressure valve is placed in line after the static mixer stage to assure proper operation of the pumps. The resultant ink stream is filtered, in embodiments, through a 0.2 micron 10 inch cartridge filter and collected in a suitable container.

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I I I I I I I I I I

I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I

XEROX DISCLOSURE JOURNAL

CONTINUOUS STATIC MIX Proposed Classification PROCESS FOR PREPARING TIJ
INKS
Int. C1. G03g 15/10 Lalit M. Bhalla
Miguel A. Fontanez

U.S. C1.346/256

Disclosed is an apparatus and continuous process for the preparation of Thermal Ink Jet (TIJ) inks. The apparatus comprises several metering pumps, a static mixer, and a 10 inch cartridge filter. The pumps are set to deliver known quantities of each starting material, such as water, glycols, pigment suspensions or dye solutions, humectant, and the like. Pulse dampeners are used to reduce pump induced pulsation of each liquid stream. All starting materials enter the static mixer at the same point and at the same time. Starting materials are mixed in the static mixer to form the T.I.J. ink. A back pressure valve is placed in line after the static mixer stage to assure proper operation of the pumps. The resultant ink stream is filtered, in embodiments, through a 0.2 micron 10 inch cartridge filter and collected in a suitable container.

In a conventional batch process, the starting materials are first added to a mixing tank, the materials are mixed and then the batch is filtered through a cartridge filter. All three steps are typically done in sequence.

The present continuous process combines all three steps which are executed simultaneously, thereby reducing cycle time and total time to make product. The con...