Browse Prior Art Database

DISSOLVED GAS REMOVAL SYSTEM

IP.com Disclosure Number: IPCOM000026286D
Original Publication Date: 1991-Feb-28
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 53K

Publishing Venue

Xerox Disclosure Journal

Abstract

A dissolved gas removal system that prevents bubble formation and gas occlusion in coating formulations and coating operations is disclosed. During processing, storage and pressurization in coating operations gases may dissolve into liquid coating formulations. Subsequent pressure drops in the system release the dissolved gases resulting in irregular or nonuniform solution discharge from the liquid applicator. Thin, spattered and bubbled surfaces appear as defects in the finished coatings. A liquid gas separator placed near the applicator discharge site provides for more uniform coating consistency. Alternatively, the separator may be located at or near high elevation points in the system. The separator may be configured as 1.) a gas only semipermeable membrane; 2.) An automatic bleed valve; or 3.)a manual bleed valve. Using a gas separator system provides for more uniform coating thicknesses, particularly in the manufacture of single and multi layer photoreceptor devices.

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XEROX DISCLOSURE JOURNAL

DISSOLVED GAS REMOVAL SYSTEM
Henry T. Mastalski

Proposed Classification
U.S. C1.355/246 Int. C1. GOln 01/10

A dissolved gas removal system that prevents bubble formation and gas occlusion in coating formulations and coating operations is disclosed. During processing, storage and pressurization in coating operations gases may dissolve into liquid coating formulations. Subsequent pressure drops in the system release the dissolved gases resulting in irregular or nonuniform solution discharge from the liquid applicator. Thin, spattered and bubbled surfaces appear as defects in the finished coatings. A liquid gas separator placed near the applicator discharge site provides for more uniform coating consistency. Alternatively, the separator may be located at or near high elevation points in the system. The separator may be configured as 1.) a gas only semipermeable membrane; 2.) An automatic bleed valve; or 3.)a manual bleed valve. Using a gas separator system provides for more uniform coating thicknesses, particularly in the manufacture of single and multi layer photoreceptor devices.

XEROX DISCLOSURE JOURNAL - Vol. 16, No. 1 January/February 1991 45

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46 XEROX DISCLOSURE JOURNAL - Vol. 16, No. I January/February 1991

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