A4R/Ltrr Paper Path (3 Sheets); Controlling The Movement Of Sheets - Canon J1 Service Manual

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Technology > Saddle Stitcher Unit > Controlling the Movement of Sheets

■ A4R/LTRR Paper Path (3 sheets)

No.1 paper sensor
Passage of paper
ON
PI18
SL1
No.2 paper sensor
Passage of paper
PI19
ON
SL2
No.3 paper sensor
Passage of paper
PI20
Entry of First sheet
Entry of Second sheet
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Technology > Saddle Stitcher Unit > Controlling the Movement of Sheets
PI18
PI19
PI20 Top edge
PI18
PI19
PI20
Entry of Third sheet
F-2-39

Controlling the Movement of Sheets

When the leading edge of a sheet has moved past the inlet flapper, the intermediate feed
roller and the crescent roller start to move the sheet forward.
The intermediate feed roller is normally not in contact with the path bed.
When the leading edge of a sheet reaches the intermediate feed roller contact section, the
feed plate contact solenoid (SL4) causes the roller to come into contact with the path bed so
as to move the sheet.
The contact is broken as soon as the leading edge of the sheet reaches the paper positioning
plate.
This series of operations is executed each time a sheet arrives.
When the leading edge of the first sheet reaches the paper positioning plate, the paper
positioning plate paper sensor (PI8) turns ON.
The arrival of the second and subsequent sheets will not be checked since the first sheet will
still be over the sensor.
The crescent roller keeps rotating while sheets are being output, butting the leading edge of
each sheet against the paper positioning plate, and ultimately, keeping the leading edge of
the stack in order.
The alignment motor (M5) drives the alignment plates for each sheet so as to put both left
and right edges of the sheet in order.
1) The solenoid turns ON while paper is being moved so that the feed plate comes into
contact.
Intermediate feed roller
Feed motor
M1
Paper positioning
plate paper sensor(PI8)
2-22
ON
Feed plate contact
solenoid
F-2-40
2-22