Development; Image Transfer - Epson C11C605001 - DFX 9000 B/W Dot-matrix Printer Service Manual

Operating Principles

2.1.1.3 Development

The development is the process of creating a toner image on the OPC drum by applying toner onto
the invisible static electriaty image. The CM (Charge Metal) blade spreads a thin, even coat of
toner over the magnet roll. ALso, as toner passes between the CM blade and tlw magnet roll, it
becomes negatively charged. The magnet mll transports toner to the surface of the OPC drum and
controls developing by developing bias. It is ratted and charged developing bias by the magnet
roll.
Resin Sleeve
Toner Image
2.1.1.4 Imsge Trsnsfer
Image transfer is the process of transferring the toner image created on the OFC drum in the
developing process to paper. As the image transfer process this time, we have WA the roller image
transfer method instead of the corom image transfer. In the roller image transfer method, there is
no generation of ozone due to corona discharge. Also, there is no blur of motion m image transfer
because the pressure bonding of the paper with the OPC drum and the BTR (Bias Transfer Roll) is
maintained.
Reverse bias is applied to not transfer the positive toner onto the BTR-
Image
2-4
Development ~PC ~rum
Bias
Figure Development
2-6.
Transfer Roller
Figure

Image Transfer

2-7.
CM Blade
L
1
Sequential Bias
Reverse Bias
Rev. A