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Browse Prior Art Database

METHOD FOR IMPROVING METHOD FOR IMPROVING AERODYNAMIC CLEANING

IP.com Disclosure Number: IPCOM000024090D
Original Publication Date: 1979-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 226K

Publishing Venue

Xerox Disclosure Journal

Abstract

In aerodynamic cleaning, the velocity variations in the air flow near the photo-receptor surface generally produce beneficial effects for the cleaning operation, One technique is to pulsate the air flow to deliberately generate such velocity disturbances for improved cleaning operation-

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XEROX DISCLOSURE JOURNAL

METHOD FOR IMPROVING Proposed Classification AERODYNAMIC CLEA~I~G U~S,CL 355/15 Benedict S~Fu Int, CL G03g 21/00

In aerodynamic cleaning, the velocity variations in the air flow near the photo~ receptor surface generally produce beneficial effects for the cleaning operation,

One technique is to pulsate the air flow to deliberately generate such velocity

disturbances for improved cleaning operation~

A pulsating flow is a steady mean flow on which there is superimposed a periodic pulsationS In a pulsating flow, the profiles for the periods of acceleration and deceleration respectively differ markedly from one another. Characteristically, the velocity during the periods of acceleration are very similar to the steady flow

profile through a gradually convergent channel and during the periods of deceleration, resemble a steady state profile in a divergent channel. Under certain

circumstances both reversal of flow and separation near the wall of the channel may occur during periods of deceleration, More importantly, the velocity profile in a divergent channel under certain conditions ceases to be symmetrical and becomes unstable such that, depending on fortuitous turbulences, the stream adheres alternately to one or the other wall of the channel,

All of the aforementioned characteristics associated with the pulsating flow would assist the process of toner detachment from the photoreceptor surface and consequently, improve the performance of an a...