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DIP TANK DIAMETER REDUCING INSERT

IP.com Disclosure Number: IPCOM000027447D
Original Publication Date: 1997-Feb-28
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 61K

Publishing Venue

Xerox Disclosure Journal

Abstract

In current photoreceptor production, both small and large diameter substrates are coated sequentially in the same dip tanks. When small diameter substrates are coated, there is sufficient distance between the substrates and the walls of the tank that standing waves are formed as a result of vibration from the coating pumps. The standing waves cause periodic variations in the thickness of the coatings. It is proposed to use an insert that can be placed in the dip tank to reduce the total volume that must be filled with a coating

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XEROX DISCLOSURE JOURNAL

DIP TANK DIAMETER REDUCING INSERT

Edward C. Williams Mark Petropoulos Stanley Pietrzykowski Robert W. Hedrick

Proposed Classification
U. S. C1. 118/644 Int. C1. B05b 05/025

In current photoreceptor production, both small and large diameter substrates are coated sequentially in the same dip tanks. When small diameter substrates are coated, there is sufficient distance between the substrates and the walls of the tank that standing waves are formed as a result of vibration from the coating pumps. The standing waves cause periodic variations in the thickness of the coatings. It is proposed to use an insert that can be placed in the dip tank to reduce the total volume that must be filled with a coating

XEROX DISCLOSURE JOURNAL - Vol. 22, No. 1 JanuarylFebruary 1997 7

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DIP TANK DIAMETER REDUCING INSERT (CONT'D)

solution. The smaller tank receives coating solution from the same lines as the main tank. The smaller tank frlls to ovefflow, a weir (dam) prevents the solution from spilling out of the coating tanks and directs the ovefflow into a main tank where it can be recirculated. The insert also prevents standing waves with amplitudes sufficient to cause coating defects. As shown in the accompanying figure, dip tank 10 consists of a weir (dam 12) having a solution output port 14 and a solution input port 16. A reducing insert 20 is shown inserted into dip tank 10.

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