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DIP-COATING EDGE PROTECTION

IP.com Disclosure Number: IPCOM000027002D
Original Publication Date: 1994-Dec-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 88K

Publishing Venue

Xerox Disclosure Journal

Abstract

In dip-coating processes, specifically including those for coating organic photoconductor (OPC) drums, it is generally necessary to mask , wipe, or generally prevent the deposition of the organic coating along the outer edges of the drums. Typically the bare ends of the drum are required to avoid abrasion of the end of the OPC drum when placed in a xerographic copier or printer, where the abraded material would contaminate the xerographic engine.

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XEROX DISCLOSURE JOURNAL

DIP-COATING EDGE PROTECTION Proposed Classification Monroe J. Hordon US. C1.118/413 William G. Herbert
Gary J. Maier
Ernest F. Matyi

Int. C1. B05c 3/02

In dip-coating processes, specifically including those for coating organic photoconductor (OPC) drums, it is generally necessary to mask , wipe, or generally prevent the deposition of the organic coating along the outer edges of the drums. Typically the bare ends of the drum are required to avoid abrasion of the end of the OPC drum when placed in a xerographic copier or printer, where the abraded material would contaminate the xerographic engine.

In many situations, bare ends of the OPC drums are accomplished by either limiting the extent (depth) to which a drum substrate is immersed in the various dip pools of the process, or by wiping the dip coating from the outer edges. It will be appreciated that the former would only be applicable to the upper edge of the drum substrate, while the latter could be applicable to both ends. Numerous problems are associated with both of these methods, including: limitations on pool coating depth and stirring, process time for brush wiping and potential for residue, and unevenness in the contours of the bare edges.

Accordingly, the present disclosure proposes the use of annular metallic, or similarly inert material, masks that exhibit a thermal coefficient of expansion moderately greater than that of the drum substrate material (e.g., aluminum). The annul...