Development; Drum Cleaning; Image Transfer; Figure 2-7. Development - Epson ActionLaser 1300 EPL-3000 Service Manual

Operating Principhs

2.1.1.5 Development

Development is the process of creating a toner image on the PC drum by applying toner to the
invisible static electric image. The doctor blade spreads a thin, even mat of toner over the flexible
sleeve. When the toner passes between the doctor blade and the flexible sleeve, it becomes
negatively charged. The flexible sleeve transports toner to the surface of the PC drum and controls
the development with the developing bias voltage.
No positive toner is transported, and the dwtor blade is charged to prevent the printing from
having a foggy background.
- Resin Sleeve
PC Drum
Toner Image
2.1.1.6

Drum Cleaning

After the image is transferred onto paper, any re maining toner on the PC drum is scraped off by
the cleaning blade and collected in the used toner bottle.
2.1.1.7 Image
Transfer
Image transfer is the process of transferring to the paper the toner image created on the PC drum
during development. ?his printer uses the roller image transfer method, instead of corona image
transfer, as the image transfer process. In roller image transfer, there is no generation of ozone as
there is with corona discharge. Also, there is no blurring caused by motion in the image transkr,
because the image transfer roller pressure bonds the paper vvith the PC drum
A reverse bias voltage is applied so that the positive toner is not transkwred onto the image transfer
roller. (The drum charge bias voltage is used.)
2-6

Figure 2-7. Development

Drum
F

2-8. Image Transfer

Figure
PC Drum
Image Transfer Roller
Sequential
+
& .
R e v e r s e B i a s & -!-
Bias
'
–
Rev. A