User Guide

3. Cassette Lifter Operation

As long as the cassette is set, the cassette lifter is operated as necessary during copying operation so

as to maintain the level of the paper stack at a specific position.

a. Lifter Movement during Copying

The stack surface is maintained at a specific height by operating the lifter during copying as follows:

The lifter movement starts when the pick-up roller shaft pushes the lifter trigger lever to release the

cam.

The lifter movement ends when the cassette runs out of copy paper.

1) As copy paper runs out, the movement of the pick-up roller increases.

Figure 3-605

2) The stack surface lowers further and the pick-up roller shaft lowers accordingly, causing the pick-up

roller shaft to push the lifter trigger lever. This movement frees the cam so that the cam starts to rotate.

Figure 3-606

Feeding roller

Pick-up roller

Lifter trigger lever

Pick-up roller shaft

Cam

Feeding motor

Pick-up rollers

Pick-up roller shaft

Pick-up width

Lifter

Copy paper

Lifter trigger lever

3–84

3. OPERATIONS AND TIMING