Toshiba 4511, 3511 manual Photoconductive Layer Aluminum Base

(6) 1st transfer

•1st transfer is a process of transcribing the toner image (visible image) formed on the photoconductive drum to the transfer belt. A positive bias is applied to the transfer roller, causing the transfer belt to be positively charged. This in turn helps to form an electric field E between the transfer belt (positive) and the photoconductive layer of the photoconductive drum (grounded), thus making the toner image transferred to the transfer belt. In the copy process of this equipment, images are transferred in the order of K→C→M→Y on the transfer belt.

(7) 2nd transfer

•An electrostatic attracting force occurs between the polarized charge (negative) on the lower surface of transfer belt and the belt itself (positive). That makes the toner being absorbed from the belt to the paper. Then an electric field is formed between the 2nd transfer roller and the transfer belt drive roller, which generates a paper polarization and thus the toner is transferred from the belt to the paper.

Transfer belt

3

Photoconductive drum

Fig. 3-312

1st transfer roller

Transfer belt

TonerE

Photoconductive
layer
Aluminum
base	Photoconductive
Fig. 3-313
	drum

Fig. 3-314

November 2003 © TOSHIBA TEC 3 - 7 e-STUDIO3511/4511 COPY PROCESS