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(11) | EP 0 033 647 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Electrostatic copying apparatus |
(57) A cleaning device for a transfer type electrostatic copying apparatus which comprises
magnetic brush cleaning means for cleaning off a magnetizable toner remaining on a
photosensitive material after transfer, comprising : (a) a hair brush roller disposed
between the magnetic brush cleaning means and a transfer zone, and having a construction
that a hair brush is filled on a peripheral surface of a cylindrical sleeve of light
transmitting material and driven for rotation and is contact with the photosensitive
material; and (b) a charge eraser lamp secured within the cylindrical sleeve. The
photosensitive material or photoreceptor is almost completely erased with respect
to the charge, and consequently, the cleaning efficiency is markedly improved owing
to the facilitated removal of the developing material through by the magnetic brush. |