Browse Prior Art Database

METHOD TO REDUCE LIQUID CONTAMINATION/WASTE

IP.com Disclosure Number: IPCOM000027263D
Original Publication Date: 1995-Dec-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 100K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a method to reduce a chemical disposal problem in, for example, dip coating unit operations, that is the rate of disposal of solvent or process solution, in wet manufacturing processes by decreasing tank to tank contamination. Alternative modifications to the method can be used to efficiently dip coat mesh type articles and minimize contamination.

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XEROX DISCLOSURE JOURNAL

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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

METHOD TO REDUCE LIQUID CONTAMINATION/WASTE US. C1.430/059 Louis Reale

Proposed Classification

Int. C1. G03g 05/06

Disclosed is a method to reduce a chemical disposal problem in, for example, dip coating unit operations, that is the rate of disposal of solvent or process solution, in wet manufacturing processes by decreasing tank to tank contamination. Alternative modifications to the method can be used to efficiently dip coat mesh type articles and minimize contamination.

A focused high energy source, such as thermal and or acoustical energy, possesses the ability to dislodge trapped beads of solution in perforated areas of an article, for example, circuit boards, scorotron grids, and the like. In wet manufacturing processes, it is common to contaminate tank B solution with the solution from tank A, when moving article from tank A to tank B. This is due to carry out of the solution, especially in areas where holes are present which can trap solvent. Eventually, the solution of tank B must be disposed of and replaced when the contamination level reaches a critical point.

The carry out contamination phenomena observed are notably not encountered in an air knife cleaning mechanism, where the fluid is pushed out by a high velocity air current. However, air knife cleaning and solvent removal have disadvantages including: piece part contamination wherein contaminants may originate from air compressor system, or be drawn into the air jet from the surrounding environment created by low pressure system (the contaminants will then be implanted or impacted onto the object s...