Chapter 2 How to Load Documents

Conditions for Multifeed Detection

Multifeed is an error when two or more sheets are fed through the ADF at once. It is also called a “multifeed” when a different document length is detected.

Multifeed detection is performed by either checking the overlapping of documents, length of the documents, or the combination of both. The following conditions are required for an accurate detection.

Detection by overlapping

z

Load documents of the same thickness onto the hopper.

z Paper weight: 20 to 209.3 g/m2 (5.5 to 56.1 lb)

 

/ 0.025 to 0.25 mm (0.001 to 0.010 in.)

z

Do not punch holes within 35 mm (1.38 in.) of the vertical lines in the

Fig.1

Reference point

35

 

35

 

35

Leading edge

Feeding direction

 

 

 

 

Front side

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bottom of paper

60 60

Center of document (Unit : mm)

left, center and right of the document. See Fig.1.

z Do not attach other documents within 35 mm (1.38 in.) of the vertical

lines in the left, center and right of the document. See Fig.1.

Detection by length

z Load documents of the same length onto the hopper.

Fig.2

Reference point

35

Leading edge

z

Variance in document lengths: 1% or less

z

Do not punch holes within 35 mm (1.38 in.) over the vertical center

 

line of the document. See Fig. 2.

Detection by overlapping and length

zLoad documents of the same thickness and the same length onto the hopper.

zPaper weight: 20 to 209.3 g/m2 (5.5 to 56.1 lb) / 0.025 to 0.25 mm (0.001 to 0.010 in.)

zVariance in document lengths: 1% or less

zDo not punch holes within 35 mm (1.38 in.) of the vertical lines in the left, center and right of the document. See Fig.1.

zDo not attach other documents within 35 mm (1.38 in.) of the vertical lines in the left, center and right of the document. See Fig.1.

The above condition applies when the document is set to the center of the pick roller width.

Front side

Feeding direction

Bottom of paper

Center of document (Unit : mm)

zThe rate of multifeed detection may drop with some documents. Multifeed cannot be detected in the area of 15 mm from the leading edge of the document.

zThe areas in Fig.1 can be changed in the Software Operation Panel. For more details, refer to "9.5 Settings

Related to Multifeed Detection" (page 207).

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