Canon CR-50 - Manual (Page 34)

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NOTE
• Note that mixing documents of different thickness may cause a
malfunction during feeding.
• Curled, wrinkled, or folded documents may cause an error. If this happens,
straighten out the curls, or reduce the number of documents loaded.
Using Infrared Double Feed Detection
The double feed detection function that the scanner is equipped with
uses the infrared sensor to detect when two or more documents are fed
at the same time.
If false detections happen too often, disable the double feed detection
function.
NOTE
• When Using the Accompanying Scanning Utility for CR-50/80:
You can disable the double feed detection function from [Scanner
Setting] in the Scanning Utility.
• For more details about how to configure scanning parameters, click the
[Help] button in the settings dialog box to view the Canon driver help.
IMPORTANT
• The following types of document may be misdetected as double fed:
• Documents with a colored background
• Documents with a glossy finish
If misdetection of double feeds occurs often, turn off double feed
detection.
• Double feed detection is valid for documents with a thickness within the
range 0.10 mm to 0.14 mm (0.004" to 0.006"). Double feeds cannot be
detected for thicker or thinner documents.
Wrinkled or creased
paper Carbon backed
paper
Curled paper
Torn paper
Paper with clips or
staples
Coated paper or fax
recording paper
Extremely thin paper
Paper with binding
holes