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AIR KNIFE METERING SYSTEM FOR DIP COATED DRUMS

IP.com Disclosure Number: IPCOM000027419D
Original Publication Date: 1996-Oct-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 55K

Publishing Venue

Xerox Disclosure Journal

Abstract

To increase the pull rate and reduce coating thickness variation in photoreceptor drum coating operations, it is proposed to install an air knife coating metering system to provide higher quality dip coated drums and reduce total cycle time. The shearing air would blow off excess coating much as air knife type coater does with flexible substrate types of coatings. The air velocity of the air knife is adjusted to achieve a close tolerance wet thickness and with known percent solids results in a specified dry thickness. Under these conditions, the total thickness is relatively independent of pull rate. Consequently, the pull rate can be speeded up without the coating becoming thicker. This substantdy increases manufacturing throughput.

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XEROX DISCLOSURE JOURNAL

AIR KNIFE METERING SYSTEM FOR DIP COATED DRUMS U. S. C1.430/066 Robert F. Dunham
Merlin E. Scharfe

Proposed Classification

Int. C1. G03g 15/04

To increase the pull rate and reduce coating thickness variation in photoreceptor drum coating operations, it is proposed to install an air knife coating metering system to provide higher quality dip coated drums and reduce total cycle time. The shearing air would blow off excess coating much as air knife type coater does with flexible substrate types of coatings. The air velocity of the air knife is adjusted to achieve a close tolerance wet thickness and with known percent solids results in a specified dry thickness. Under these conditions, the total thickness is relatively independent of pull rate. Consequently, the pull rate can be speeded up without the coating becoming thicker. This substantdy increases manufacturing throughput.

REFERENCES

Duda, et al. "Prediction of Diffusion Coefficients for Polymer Solvent Systems." AlChe Journal March 1982.

Sielinski, et al. "Predicting PolymedSolvent Diffusion Coefficients Using Free Volume Theory." AlChe Journal March 1992: 405-415.

DP5484

XEROX DISCLOSURE JOURNAL - Vol. 21, No. 5 September/October 1996 337

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338 XEROX DISCLOSURE JOURNAL - Vol. 21, No. 5 SeptembedOctober 1996

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