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In photocopying, a particular type of cleaning brush tuft geometry has been found effective for cleaning toner from photoconductors.
English (United States)
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Cleaning Brush Geometry
In photocopying, a particular type of cleaning brush tuft geometry has been
found effective for cleaning toner from photoconductors.
Figs. 1 and 2 show two extremes of geometry, where "X" is the distance
between tufts 10 in the direction of brush rotation 11, and "D" is the tuft diameter.
Fig. 1 illustrates a small ratio of D/X which permits greater tuft flexibility, allowing
the fibers to sweep the surface 12 with greater contact along the fibers and with
greater mechanical "flicking" action. The larger ratio of D/X of Fig. 2 results in
having more filaments available for cleaning.
It is desirable to optimize both of these characteristics (filaments per square
inch and the distance between tufts) to obtain optimum cleaning. Specifically, a
tuft density near 75 per square inch, and an indirect measure of tuft diameter of
near 70,000 filaments per square inch has been found to be an ideal
arrangement for a photoconductor surface engagement of .070 inch. This
geometry results in rows of tufts that look like a solid fan (greater frontal area) of
more flexible tufts similar to that of Fig. 1.
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