EN Image formation system 61
Image formation system
Laser printing requires the interaction of several different technologies (such as electronics, optics,
and electrophotographics) to provide a printed page. Each process functions independently and
must be coordinated with the other printer processes. Image formation consists of six processes:
Step 1 Drum Cleaning
Step 2 Drum Conditioning
Step 3 Image Writing
Step 4 Image Developing
Step 5 Image Transferring
Step 6 Image Fusing
Figure 5-4 Image formation block diagram
Toner cartridge
As the “heart” of the Image Formation System, the toner cartridge houses the cleaning, conditioning,
and developing steps of the process. The toner cartridge contains the photosensitive drum, primary
charging roller, developing station, toner cavity, and cleaning station. Including these components,
which wear, degrade, or are consumed in the replaceable toner cartridge, eliminates the need for a
service call when replacement is required. The special photosensitive properties of the drum allow
an image to be formed on the drum surface and then transferred to paper.
CAUTION The printer’s toner cartridge does not include a light-blocking shutter. Be careful to avoid exposing the
drum to light, which can permanently damage the drum. Protect the cartridge whenever removing it
from the printer.
Electrostatic Latent Image Formation Block
Flow of Paper
Direction of Drum
2. Scanning Exposure
3. Developing
4. Transfer
7. Drum Cleaning
6. Fusing
5. Separation
1. Primary Charging
Drum Cleaning
Block
Fuser Block
Paper Delivery
Transfer Block
Manual Feeding Slot
Multi-Purpose Tray
Registration
Service.book Page 61 Thursday, September 14, 2000 11:15 AM
