User manual

95.08.23.11.29
Color LaserWriter 12/600 PS Basics & Theory 1–54
Step 6:
Attraction
The attraction roller imparts negative charges onto the paper and helps
hold the paper to the transfer drum surface by means of electrostatic
force. The attraction roller presses only for the first color and separates
from the transfer drum upon completion of the transfer operation for
the first color.
Note: If you select “Best” as the print quality mode, the entire sheet
receives the attraction charge prior to any imaging. This assures the
best possible attraction of paper to drum and requires one extra rotation
of the transfer drum.
For monochrome and continuous print operation, the attraction roller is
separated from the transfer drum upon completion of a single-page
transfer, and returns to the drum before the transfer starts for the next
page.
DC bias is applied to the attraction roller. The value of the DC bias
varies in line with the temperature/humidity sensing system.
Example: The attraction roller presses in frame 59 of the animation
and separates in frame 89 after the trailing edge of the paper passes.
Transfer Drum
Paper
DC Bias
DC bias
Transfer Sheet
Attraction Roller
(Rotates by Friction)
Animation