FUJITSU fi-4120C - Manual (Page 158)

8.5 Double-feed Detection Conditions 131
8
ADF A
N
D
P
A
P
E
R SP
ECIFI
C
A
T
ION
■ ■ ■ ■ 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
• 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.
• The deviation in the amount of the light transmitted through
background areas must not be less than 10%.
HINT
The type of document and document conditions
sometimes cause the double-feed detection
rate to drop.