6.4. LASER SCANNING UNIT LOCATIONS
6.5. DEVELOPING AND TRANSCRIPTION
The developing is the stage that the OPC drum with an invisible image is changed to visible by
the toner. The developer consists of mixing paddle, toner supply roller, developing roller,
developing blade and OPC drum. The bias voltage is added to the developing roller (DC -180V)
and toner supply roller (DC -350V). Firstly the toner is mixed up in the mixing paddle and minus-
charged by triboelectricity, then led to the toner supply roller. Secondly the potential difference
causes to send the toner to the developing roller from the toner supply roller. The supplied
toner to the developing roller is kept to a certain layer thickness by the developing blade and
also it is charged by triboelectricity. Consequently the toner is transferred to the surface of the
exposed OPC drum by the potential difference between the developing roller and OPC drum's
surface.
The transcription is the stage that the created image on the OPC drum is transferred to the
paper. When the transcription roller is plus-charged with the image, the minus-charged toner
particles are gathered on the surface of the drum and transferred to the paper.
Developing and Transcription Part
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