Controlling The Inlet Flappers; Overview - Canon J1 Service Manual

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Technology > Saddle Stitcher Unit > Controlling the Inlet Flappers > Overview
■ Folding/Delivering the Stack
The paper pushing plate pushes against the center of the stack to move it in the direction of
the paper folding rollers.
In response, the paper folding rollers pick the stack along its center and fold it in two.
The paper folding rollers together with the delivery roller then move the stack along to output
it on the delivery tray.
Paper folding
roller
Delivery roller
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Technology > Saddle Stitcher Unit > Controlling the Inlet Flappers > Overview

Controlling the Inlet Flappers

■ Overview

The two flappers mounted at the paper inlet are operated to configure the feed path according
to the size of paper.
The flappers are used to enable the following:
1. To detect the passage of the trailing edge of the paper being moved by an appropriate
sensor.
2. To prevent the following sheet from butting against the top of the existing stack,
The following table shows the relationship between sensors and paper sizes.
SENSOR
No.1 paper sensor
(PI18)
No.2 paper sensor
(PI19)
No.3 paper sensor
(PI20)
Each flapper is driven by its own solenoid.
The following table shows the relationship between solenoids and paper sizes.
Solenoid
No.1 paper
deflecting solenoid
(SL1)
No.2 paper
deflecting solenoid
(SL2)
F-2-36
A3 B4/LGL
305mm×457mm(12×18)
279mm×432mm(11×17)
Used Used
Not used Used
Not used Not used
A3 B4/LGL
305mm×457mm(12×18)
279mm×432mm(11×17)
OFF ON
OFF OFF
2-20
A4R/LTRR
Used
Used
Used
T-2-4
A4R/LTRR
ON
ON
T-2-5
2-20