Confidential
Ref. 2-9
3.2.5 Paper Feeding for Duplex Printing (DX) (HL-4040CDN/ 4050CDN/ 4070CDW only)
After the paper eject actuator detects the edge of the paper and a certain volume of paper is
sent from the paper eject roller shaft ASSY, it rotates against the normal direction of rotation,
thereby enabling the paper to be pulled in and pass between the outer chute and the back
cover. The paper is subsequently sent to the back of the paper tray, and to the belt unit again
by way of the feed roller. Printing is done on the back side of the paper.
Here, “the back side of paper” refers to the paper side which is printed for the second time. In
actual duplex printing, an even page is printed as the first print side after being turned upside
down 180 degrees, and then an odd page is printed as the second print side.
Fig. Ref2-10
Paper eject roller shaft ASSY
Outer chute
Feed roller
Back cover
Feed roller
Paper eject
actuator
Belt unit
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