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1.3.5 Secondary transfer (IDT 1 -> IDT 2)
In the secondary transfer process, the toner image formed on the IDT 1 sur face is transferred onto the
surface of the IDT 2 (Intermediate Drum Transfer 1: intermediate transfer roll 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 volta ge from HVPS.
Both the IDT 1 and IDT 2 are positively charged. Voltage is higher on the IDT 2 a nd toner image is
attracted to the IDT 2 surface and transferred onto the IDT 2.
1.3.6 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 HVPS with a condu ctive roll brush.
The IDT 1 cleaner is placed in contact with the IDT 1 at the position through which i t passes after the
toner image having been transferred from the drum is transfe rred to the IDT 2. Toner remaining on the
IDT 1 is electrically scraped and stored. The toner stored is collected upon completion of printing or at
the time of cleaning cycle. (Refer to 1.3.11 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