Conditions Required to Accurately Detect Overlapped Documents (Multifeed)
Multifeed is an error that occurs when two or more sheets are overlapped and fed at once.
Overlapped documents are detected with the ultrasonic sensor or according to the difference in length of the
documents.
You can load multiple documents in the ADF paper chute (feeder). For documents that are loaded, the
following conditions are required for overlapped documents to be detected accurately.
Detecting Overlapped Documents with the Ultrasonic Sensor
● Paper weight: 40 to 127 g/m
2
(11 to 34 lb) (0.048 to 0.15 mm)
● Do not punch holes within 35 mm (1.38 in.) over the center of the document.
Refer to Fig. 1 in Area Not to Be Perforated (page 53).
● Do not attach other documents with glue or other adhesive within 35 mm (1.38 in.) over the center of
the document.
Refer to Fig. 1 in Area Not to Be Perforated (page 53).
Detecting Overlapped Documents according to the Difference in Length
● Load the documents of the same length in the ADF paper chute (feeder).
● Variation in document lengths: 1% or less
● Do not punch holes within 35 mm (1.38 in.) over the center of the document.
Refer to Fig. 1 in Area Not to Be Perforated (page 53).
Detecting Overlapped Documents with the Ultrasonic Sensor and According to the Difference in Length
● Load the documents of the same length in the ADF paper chute (feeder).
● Paper weight: 40 to 127 g/m
2
(11 to 34 lb) (0.048 to 0.15 mm)
● Variation in document lengths: 1% or less
● Do not punch holes within 35 mm (1.38 in.) over the center of the document.
Refer to Fig. 1 in Area Not to Be Perforated (page 53).
● Do not attach other documents with glue or other adhesive within 35 mm (1.38 in.) over the center of
the document.
Refer to Fig. 1 in Area Not to Be Perforated (page 53).
ATTENTION
The above conditions apply when documents are loaded covering the pick roller and the document loading
detector.
HINT
● The accuracy of detection for overlapped documents may drop depending on the document type.
Overlapping cannot be detected for the top 30 mm (1.18 in.) of a document in the feeding direction.
● In the Software Operation Panel, you can specify an area not to detect overlapping of documents within
the area described in Fig. 1 in Area Not to Be Perforated (page 53).
How to Load Documents
54
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