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8.5 Double-feed Detection Conditions
131
8
ADF AND PAPER SPECIFICATION
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Detection by Document Thickness and Length
Sheets of the same thickness and length shall be set in the
ADF at a time.
•
Document length: 0.065 to 0.15mm
•
Document length deviation: 1% or less
•
Printed area: 12% or less
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No black printed areas are allowed at the center area
(26 x 10mm) at the leading edge of the document.
•
Punched holes are not allowed within 35mm of the vertical
center line of the document.
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The deviation in the amount of the light transmitted through
background areas must not be less than 10%.
The type of document and document conditions
sometimes cause the double-feed detection
rate to drop.