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ION EXCHANGE CARTRIDGE FOR HEAVY METAL ION REMOVAL IN INK OF CONTINUOUS STREAM-TYPE INK JET PRINTER

IP.com Disclosure Number: IPCOM000025449D
Original Publication Date: 1985-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 40K

Publishing Venue

Xerox Disclosure Journal

Abstract

In continuous stream-type ink jet printers, the ink not used for printing on a recording medium is directed to a gutter for collection and recirculation to the printer's ink supply. The ink used generally has an additive, such as EDTA, for chelating the di-valent and tri-valent metal ions and this EDTA additive is inherently corrosive. This metal scavenging additive may be replaced by an ion exchange filter cartridge placed into the ink circulating system, if the cartridge contains the sodium form of the type of resin used for softening hard water. In practice, calcium, magnesium, aluminum and similar potential scum formers are picked up by the resin which releases its sodium ions to the ink.

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bcEROX DISCLOSURE JOURNAL

ION EXCHANGE CARTRIDGE FOR HEAVY METAL ION REMOVAL IN U.S. CI. 436/2 INK OF CONTINUOUS STREAM-TYPE Int. CI. GOln 31/00 INK JET PRINTER

Proposed Classification

Warren E. Solodar

In continuous stream-type ink jet printers, the ink not used for printing on a recording medium is directed to a gutter for collection and recirculation to the printer's ink supply. The ink used generally has an additive, such as EDTA, for chelating the di-valent and tri-valent metal ions and this EDTA additive is inherently corrosive. This metal scavenging additive may be replaced by an ion exchange filter cartridge placed into the ink circulating system, if the cartridge contains the sodium form of the type of resin used for softening hard water. In practice, calcium, magnesium, aluminum and similar potential scum formers are picked up by the resin which releases its sodium ions to the ink.

Volume 10 Number 3 May/June 1985 171

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  XEROX DISCLOSURE JOURNAL Volume 10 Number 3 May/June 1985

[This page contains 1 picture or other non-text object]