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POSITIVE AIR PRESSURE SEALING DEVICE FOR DEVELOPER HOUSING

IP.com Disclosure Number: IPCOM000025467D
Original Publication Date: 1985-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 67K

Publishing Venue

Xerox Disclosure Journal

Abstract

A sealing device (1) for the lower lip (2) of the developer housing (3) of a xerographic copying machine. The arrangement provides a thin film positive pressure air field effect, and acts like an air bearing pad. A concave face (4) of the device forms a surface parallel with the photoreceptor surface (5) over a significantly long circumferential length. A series of air ports (6) in a specific hole pattern provide a positive pressure field within the gap between the device (1) and the photoreceptor surface (5). The hole pattern is such as to bias the field towards the lower lip (2) of the developer housing. This is to counter the distortion in pressure distribution brought about by the motion of the photoreceptor.

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KEROX DISCLOSURE JOURNAL

POSITIVE AIR PRESSURE SEALING DEVICE FOR DEVELOPER HOUSING U.S. Cl. 355/3DD
D. J. Wright
I. Harding

Proposed Classification

Int. Cl. G03g 15/00

Volume 10 Number 4 July/August 1985 215

[This page contains 1 picture or other non-text object]

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POSITIVE AIR PRESSURE SEALING DEVICE FOR DEVELOPER HOUSING (Cont'd)

A sealing device (1) for the lower lip (2) of the developer housing (3) of a xerographic copying machine. The arrangement provides a thin film positive pressure air field effect, and acts like an air bearing pad. A concave face (4) of the device forms a surface parallel with the photoreceptor surface (5) over a significantly long circumferential length. A series of air ports (6) in a specific hole pattern provide a positive pressure field within the gap between the device
(1) and the photoreceptor surface (5). The hole pattern is such as to bias the field towards the lower lip (2) of the developer housing. This is to counter the distortion in pressure distribution brought about by the motion of the photoreceptor.

The device is mounted via an elastic mounting, such as rubber blocks (7), to the developer housing. The parallel gap is obtained by shoes (8) mounted on each axial end of the device. These shoes have four point contact, two at each end, with the photoreceptor ends.

Air is provided to the ports via a plenum/manifold chest (9) forming the rear of the device. This introduces air flow in such a manner as to give a reaso...