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HELMHOLTZ RESONATOR TO ENHANCE THE EFFICIENCY OF AERODYNAMIC CLEANING

IP.com Disclosure Number: IPCOM000024373D
Original Publication Date: 1980-Jun-30
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 100K

Publishing Venue

Xerox Disclosure Journal

Abstract

For aerodynamic cleaning of the residual toner from a photoreceptor surface 4, the usual approach is to employ a steady flow of air through the vacuum cleaning shoe 5. While intuitively it might be thought that an unsteady flow would probably be more desirable than a steady flow, it has been shown that cleaning with pseudo-steady vortices in the air stream produces better results. It is also known that cleaning patterns exhibit striation marks in the direction of air flow, indicating that secondary, high-f requency fluctuation in the air velocity superimposed upon the steady air velocity in the channel area 6 caused by a low-magnitude disturbance in the pressure drop could produce favorable effects on cleaning. However, due to the narrow size of the channel area 6 in conventional cleaning shoes, the majority of the low-magnitude, high-frequency disturbances are dampened out, minimizing the effects of any periodic time-varying pressure disturbances on cleaning.

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XEROX DISCLOSURE JOURNAL

HELMHOLTZ RESONATOR TO ENHANCE THE EFFICIENCY OF AERODYNAMIC CLEANING Int. C1. G03g 21/00 Ben Fu
Robert Page

Proposed Classification
U.S. C1. 355/15

8' u-

For aerodynamic cleaning of the residual toner from a photoreceptor surface 4, the usual approach is to employ a steady flow of air through the vacuum cleaning shoe
5. While intuitively it might be thought that an unsteady flow would probably be more desirable than a steady flow, it has been shown that cleaning with pseudo- steady vortices in the air stream produces better results. It is also known that cleaning patterns exhibit striation marks in the direction of air flow, indicating that secondary, high-f requency fluctuation in the air velocity superimposed upon the steady air velocity in the channel area 6 caused by a low-magnitude disturbance in the pressure drop could produce favorable effects on cleaning. However, due to the narrow size of the channel area 6 in conventional cleaning shoes, the majority of the low-magnitude, high-frequency disturbances are dampened out, minimizing the effects of any periodic time-varying pressure disturbances on cleaning.

To amplify these inherent time-varying disturbances in a specific frequency range and enhance cleaning performance, a Helmholtz resonator is provided inside the channel area 6 of an aerodynamic cleaning shoe. As shown in the drawing, the Helmholtz resonator consists of air pockets 8 with openings 9 into the air channel along the surface of the cleaning shoe, the openin...