Drum Cleaning - Gestetner B070 Service Manual

DRUM UNIT

6.11.4 DRUM CLEANING

Overview
[C]
[D]
This copier uses a counter blade system to clean the drum. In a counter blade
system, the drum cleaning blade [A] is angled against drum rotation. The counter
blade system has the following advantages:
• Less wearing of the cleaning blade edge
• High cleaning efficiency
Due to the high efficiency of this cleaning system, the pre-cleaning corona and
cleaning bias are not used for this copier.
The cleaning brush [B] helps the cleaning blade. The brush removes toner from the
drum surface and any remaining toner is scraped off by the cleaning blade. Toner
on the cleaning brush is scraped off by the mylar [C] and falls onto the toner
collection coil [D]. The coil transports the toner to back to the toner entrance tank in
the toner bank unit for recycling.
To remove any accumulated toner at the edge of the cleaning blade, the drum
turns in reverse for about 40 ms [E] at the end of every copy job. This is also during
long copy jobs every 30 min. For details, refer to SP2506 002 (Cleaning Interval –
Multiple Copy - Inteval) in Section "5. Service Tables".
The accumulated toner is deposited on the drum and is removed by the cleaning
brush.
B070/B071
CÓPIA NÃO CONTROLADA
[A]
[B]
B070D866.WMF
[B]
6-60
CÓPIA NÃO CONTROLADA
[A]
[B]
B070D867.WMF
[A]
[E]
SM