Canon LBP-1260, Руководство по обслуживанию

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Power- ON
The upper separation roller is driven via a
torque limiter by the motor, which imparts
a turning moment in the direction of
rotation of the pick-up and lower
separation rollers (in the direction of the
white arrow in Figure 2-52.
When a single envelope is fed, however.
the upper separation roller is forced to
rotate in the opposite direction (in the
direction of the black arrow in Figure 2-52)
by the movement of the envelope, which is
driven by the lower separation roller.
Since the friction between the envelopes
is weak when two or more envelopes are
fed simultaneously (multi-feed), the
rotating force of the lower roller is not
strong enough to cause the upper roller to
rotate in the same direction as it is
rotating. The upper roller rotates in the
direction of the white arrow in Figure 2-52,
and the envelope on the bottom of the
feeder passes through the others are
returned to the feeder.
Upper separation roller
Lower separation roller
Upper separation roller
Envelope
Normal
Pick-up roller
Lower separation roller
Upper separation roller
Multifeed
Lower separation roller
Figure