Oki Data CONFIDENTIAL
44871001TH Rev.6
2-4
2. DESCRIPTION OF OPERATION
4. Transfer
The transfer roller, which is from conductive sponge material, is created to meet
intimate attachment of image drum roller surface and feeding paper. The feeding
paper is set up on the surface of image drum. Plus charge, which is the converse
polarity with toner polarity, is applied from the backside of the paper.
As high plus voltage is applied to transfer roller from the power supply, the plus
charge on the transfer roller surface is induced and transferred to the paper while
the paper contact the transfer roller. The negative charged toner, which has been
attracted to the image drum surface, is transferred to the surface of feeding paper
by the plus charge of the backside of the paper.
5. Fusing
After the termination of transfer the unsettled toner image is settled to paper by
heat and pressure while passing between Heat roller and Back up roller. Heat roller
is Teflon coated and is mounted by heater that can generate heat (Halogen lamp).
The thermistor that contacts the Heat roller adjusts the Heat roller temperature to
the temperature specified by the menu complying with the paper width. For safety
the thermostat shuts off the voltage supply to the Heater by opening the thermostat
in the case of abnormally temperature increasing.
The back up roller is held by the pressure springs on each terminal due to the
pressure applied.
Image drum
Transfer roller
Paper
Power
Separating nail
Paper
Heater
Heat roller
Thermistor
Backup roller
Pressuring spring
Thermostat
To Next Page
Loading...
