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INEXPENSIVE VISUAL INSPECTION OF ALUMINUM SUBSTRATES

IP.com Disclosure Number: IPCOM000027033D
Original Publication Date: 1994-Dec-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 59K

Publishing Venue

Xerox Disclosure Journal

Abstract

Photoconductors or photoreceptors for electrophotographic imaging processes frequently comprise an aluminum substrate onto which is coated a photoconductive material, such as selenium, an alloy of selenium with tellurium and/or arsenic, an organic photoconductive material, or the like. The aluminum substrate generally must have a smooth, uniform surface to avoid defects in the photoreceptor formed when the substrate is coated with

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XEROX DISCLOSURE JOURNAL

INEXPENSIVE VISUAL Proposed Classification INSPECTION OF ALUMINUM US. C1.427/008 SUBSTRATES Int. C1. B05d 1/04 Kamran U. Zaman

Photoconductors or photoreceptors for electrophotographic imaging processes frequently comprise an aluminum substrate onto which is coated a photoconductive material, such as selenium, an alloy of selenium with tellurium and/or arsenic, an organic photoconductive material, or the like. The aluminum substrate generally must have a smooth, uniform surface to avoid defects in the photoreceptor formed when the substrate is coated with

the photoconductive material. Detection of defects, such as extrusion or lathing defects or the like, in aluminum substrates can be expensive and time consuming, with known methods, which typically entail microscopic examination and require machinery of limited mobility, the operation of which frequently require operator training.

By exposing an aluminum substrate at a relatively cool temperature to warm or hot humid air, the water in the air condenses onto the chilled surface of the substrate, producing a frosting effect. When a surface defect is present on the aluminum substrate, the frosting pattern is irregular. Accordingly, inspection for surface defects is simplified by enabling examination of the frost pattern thus formed for irregularities.

XEROX DISCLOSURE JOURNAL - Vol. 19, No. 6 NovembedDecember 1994 515

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