Transfer/Separation Section; Transfer; Separation - Printronix L5000 Series Maintenance Manual

Transfer/Separation Section

In this section, the toner image, which has been formed on the drum surface in the
developing section, is transferred onto the paper supplied from the paper feed section,
and then the paper is separated from the drum.

Transfer

The toner attracted to the photoreceptor drum surface is positively charged due to the
charge placed on it by the developing unit. Therefore, when the print paper is passed
beneath the drum surface on which the print image is developed, and the back surface
of the paper is negatively charged by means of corona discharge, the toner attracted
to the drum surface is transferred onto the paper.

Separation

The drum surface areas to which no toner is attracted are positively charged.
Therefore, the paper negatively charged in the transfer section adheres to the drum
and would not leave the drum if this situation is allowed to continue. To separate the
paper from the drum, therefore, corona discharge is invoked again to eliminate the
charge from the paper immediately after completion of toner image transfer, using
AC voltage to which positive DC bias is added.
5–14
Separation charger
Transfer charger
Principles of Operation