Deskew operation
Sliding side guides on the input tray make sure that the paper stack is correctly aligned at the center of the
input tray when paper is loaded in the tray. The correct position of the loaded paper is parallel with the
direction of travel into the document feeder paper path.
The document feeder further reduces paper skew due to improper loading of paper in the input tray by
buckling the paper to create a paper buer.
The document feeder aligns the leading edge of the paper parallel with the deskew drive rollers before it is
driven further into the document feeder paper path.
NOTE: If the page to be copied is smaller than the minimal sliding guide setting, do not use the document
feeder for the copy job. Attempting to copy too small of a page using the document feeder can result in
document feeder jams and/or damage to the original page. Instead, use the atbed glass to copy the page.
Figure 1-50 Deskew operation
Document feeder hinges
The document feeder hinges allow positioning the assembly vertically above the scanner glass to
accommodate the placement of books and other objects up to 25 mm (1.0 in) in height on the scanner glass.
The document feeder still closes (the bottom of the ADF is kept parallel to the scanner glass) and allows the
printer to operate.
The document feeder hinges provide height adjustment of 25 mm (1.0 in) when a maximum downward force
of 4.5 kg (10 lb) is applied at the front edge of the assembly, with the fulcrum (such as the spine of a book)
centered on the scanner glass and parallel to its long axis.
The document feeder will withstand a downward force of about 4.5 kg (10 lb) applied at the front edge center
of the assembly—when the fulcrum (such as the spine of a book) is located anywhere on the scanner glass
and parallel to its long axis—without breaking, deforming, detaching or experiencing performance
degradation.
The document feeder hinges support the assembly in the open position and prevent the document feeder
from suddenly closing in a damaging or loud manner.
The hinges can hold the document feeder static in all positions higher than 100 mm (3.93 in); measured at the
front of the assembly. Less than 2.3 kg (5 lb) of force is required to open or close the document feeder.
74 Chapter 1 Theory of operation ENWW
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