14. Transfer Corona section
Theory of Operation Ver. 8.0 Jun. 2008
8
4
Composition/Operation
14.3.8
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 high volt-
age unit according to the paper type and the environmental conditions, and whether the
print cycle is for printing the 1st side or 2nd.
• In order to separate thin paper or curled paper caused by 2-sided printing from the trans-
fer belt without fail after the 2nd image transfer, transfer belt separator claws are
mounted at 5 places.
• Switching of output of the charge neutralizing cloth
HV2
A00JT2C022AA
Charge Neutralizing Cloth
Paper Separator Claws
Transfer Belt
2nd Image
Transfer Roller
Paper Type
Ambience
Control
Detailed description
1-sided
printing on the
plain paper
Low humidity
Bias applied
• A negative charge, which is the reverse polarity to
the positive output from the 2nd Transfer Roller, is
applied to prevent the paper from being wound
around the Transfer Belt.
Normal
Bias applied
High humidity
GND through
resistors
• To prevent separation noise, grounded through
resistors regardless of the ambient conditions.
2nd side of
2-sided
printing on the
plain paper
–
Bias applied
• Bias is applied regardless of the ambient condi-
tions, since the paper to go to the 2nd side print
cycle, which has undergone the fusing process, has
the condition equivalent to paper under low humid-
ity ambience.
Special paper
other than
plain paper
–
GND through
resistors
• Paper is stiff enough to present no separation prob-
lems.
• To prevent separation noise, grounded through
resistors regardless of the ambient conditions.
Theory of Operation Y107522-3
