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Belt Cleaner

IP.com Disclosure Number: IPCOM000080365D
Original Publication Date: 1973-Dec-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 31K

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This apparatus relates to a transverse belt cleaning system for a conventional dry toner.

This text was extracted from a PDF file.
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This is the abbreviated version, containing approximately 100% of the total text.

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Belt Cleaner

This apparatus relates to a transverse belt cleaning system for a conventional dry toner.

A narrow cleaning belt 1 mounted on rollers 2 and 3 runs parallel to the axis of photoconductor drum 4. Belt 1 removes the residual toner from drum 4. Rotating knock-off bar 5 positioned at one end of belt 1 removes the excess toner from belt 1 which, in turn, is through the medium of exhaust fan 6 attracted to and collected on biased conductive roll 7.

While it is not shown, the system lends itself to the recovery of the excess toner by removing it from conductive roll 7 by doctor blade 8 and returned to the source of developer.

The advantage of the foregoing system, is that a narrow belt 1 reduces the air flow requirements necessary to obtain a velocity sufficient to entrain the toner particles. The use of the rotating knock-off bar 5 provides for the necessary relative velocity between the knock-off bar and the cleaning belt 1 without increasing the surface speed of the belt. The cleaning belt needs only to run fast enough to clean the drum surface, thus improving the photoconductor life.


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