Canon Paper Deck-AF1 Service Manual page 28

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Technology > Controls > Feed Block > Double Feeding Detection (Option) Control
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Double Feeding Detection (Option) Control
A double feeding sensor (S009, S010) is available optionally to detect double feeding of
paper.
If the double feeding sensor (PS009, S010) mounted on the horizontal path detects double
feeding of paper, it is judged as being a double feeding jam.
The double feeding sensor (PS009, S010) emits ultrasonic sounds like burst and judges
whether double feeding occurs or not according to the echo level. The layer of the air
between double-fed sheets lowers the echo level. When a double feeding jam occurs, the
sheets preceding the double-fed sheet are fed to the host machine. The double-fed sheet and
its succeeding sheets are fed to the escape tray via the escape path.
Double feeding
sensor (Receive)
（S009）
Double feeding
sensor(Transmission)
（S010）
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Technology > Controls > Feed Block > Double Feeding Detection (Option) Control
F-2-16 F-2-16
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