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Chapter 6 Principles of Operation
6 – 12
1.3.6 Secondary transfer (IDT 1 -> IDT 2)
In the secondary transfer process, the toner image formed on the IDT 1 surface is transferred onto the
surface of the IDT 2 (Intermediate Drum Transfer 2).
Two color toner image transferred onto the 2 IDT 1 is transferred to the IDT 2. Thus, 4 color toner
image are compiled on the IDT 2 as finished toner image.
- IDT 2 is a conductive roll and receives supply of positive high voltage from HIGH VOLTAGE
POWER SUPPLY (HVPS).
Both the IDT 1 and IDT 2 are positively charged. Voltage is higher on the IDT 2 and toner image is
attracted to the IDT 2 surface and transferred onto the IDT 2.
1.3.7 Cleaning (IDT 1)
In the cleaning process (IDT 1), toner remaining on the IDT 1 after the toner image is transferred to the
IDT 2 is temporarily stored in the IDT 1 cleaner.
- The IDT 1 cleaner receives positive high voltage from the HIGH VOLTAGE POWER SUPPLY
(HVPS) with a conductive roll brush.
The IDT 1 cleaner is placed in contact with the IDT 1 at the position through which it passes after
the toner image having been transferred from the drum is transferred to the IDT2. Toner remaining
on the IDT 1 is electrically absorbed and stored.
The toner stored is collected upon completion of printing or at the time of cleaning cycle. (Refer to
"1.3.12 Cleaning (general)".)
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: Positive electric charge
: Toner
IDT1
IDT1
HVPS
IDT2
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HVPS
engine principle0018FA
IDT1 Cleaner
IDT1 Cleaner