Ricoh A229 - Drum Cleaning and Toner Recycling; Overview

DRUM UNIT
2-58
A229 SM
2.5.5 DRUM CLEANING AND TONER RECYCLING
Overview
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] supports 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 the recycling unit.
To remove any accumulated toner at the edge of the cleaning blade, the drum
turns in reverse for about 4 mm at the end of every copy job. The accumulated
toner is deposited on the drum and is removed by the cleaning brush.
A229D561.WMF
A229D560.WMF
[A]
[B]
[C]
[D]
4 mm
[A]
[A]
[B]
[B]