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ENWW Automatic duplex unit (ADU) 99
MFP unit explanation
b Straight ejection
When paper is ejected straight, the
reverse gate SD (SD7) is turned on to
close the reverse/exit selection gate.
The paper fed by the paper exit roller
is fed to the paper exit roller with the
print side up.
c ADU paper conveyance
In the two-sided copy mode, the
paper finished with printing on the
front side is fed, through the path
under the reverse/exit selection gate,
into the reverse/exit section just like
the reverse/exit operation. Then, the
paper is fed to the ADU by the
reverse/exit roller and ADU reverse
roller. These rollers do not rotate in
the opposite direction even when the
paper reverse PS (PS42) detects the
trailing edge of the paper, allowing
the paper to be fed until the
reverse/exit PS (PS46) turns off.
*6 Non-stack paper feed mechanism
In the two-sided copy mode, the ADU
reverse roller starts rotating in the
opposite direction when the reverse/exit
PS (PS46) detects the trailing edge of
paper and consequently it turns off. The
paper is fed toward the reverse/exit
section. However, since the ADU gate is
closed, the paper is fed to the ADU
conveyance roller/1 through the path
above this gate. Thus, the paper is
reversed and fed to the ADU exit,
without being stacked in the ADU.
The reversed paper is fed by ADU
conveyance rollers 1-4.