Charge Neutralization And Separation Of Paper - Develop QC 2235 Plus Service Manual

Transfer Corona section
10.3.8

Charge neutralization and separation of paper

• To neutralize any charge potential left in the paper which has undergone the 2nd image
transfer stage, a Charge Neutralizing Cloth is installed to the guide plate after the 2nd
Image Transfer Roller.
• The output of the Charge Neutralizing Cloth is switched automatically using the DC
power Supply/1 according to the paper type and the environmental conditions.
• Also provided are the three Transfer Belt Paper Separator Claws that properly separate
paper after the 2nd image transfer stage from the Transfer Belt.
Charge Neutralizing Cloth
Transfer Belt 2nd Image
Transfer Roller
• Switching of output of the Charge Neutralizing Cloth
Paper Type Ambience
Low humidity
1-sided print-
ing on the
plain paper
Normal
High humidity
2nd side of 2-
sided printing
–
on the plain
paper
Special paper
other than –
plain paper
QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
HV1
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Control
• A negative charge, which is the reverse polarity to
the positive output from the 2nd Transfer Roller, is
Bias applied
applied to prevent the paper from being wound
around the Transfer Belt.
GND through
resistors
• Bias is applied regardless of the ambient condi-
tions, since the paper to go to the 2nd side print
Bias applied cycle, which has undergone the fusing process, has
the condition equivalent to paper under low humid-
ity ambience.
• Paper is stiff enough to present no separation prob-
GND through lems.
resistors • To prevent separation noise, grounded through
resistors regardless of the ambient conditions.
2-44
Paper Separator Claws
Detailed Description
–
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