Paper Jam Detection - Canon LBP 2460 - B/W Laser Printer Service Manual

CHAPTER 2
As the friction between envelopes is weak when ened two or more envelopes are fed
simultaneously (multi-feed), the rotating force of the lower roller is not strong enough to keep the
upper roller rotating in its original direction. The upper roller therefore rotates in the opposite
direction to the pick-up direction (shown by white arrows in figure 2-8-4 below)
Any extra envelopes are returned to the feeder while only one is sent through into the printer.
C. Paper Jam Detection
Paper jams are detected in the envelope feeder pick-up and feed path in the same fashion as in the
main unit. (refer to pages 2-55 - 58 for details)
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