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User GuidePro C7500/C7500H

Envelopes with triangular flaps are not stacked properly

The trailing edge of a triangular flap envelope (center of the triangular flap) remains in the machine, so the envelope is not stacked in the correct order or drops from the output tray.

Cause:

  1. The trailing edge of the envelope is delivered by the paper exit roller to the exit tray, but the center of the flap at the trailing edge is still prone to remain in the machine when the envelope has passed the paper exit roller's nip.

    [A]: Paper exit roller pitch

    [B]: Paper feed direction

  2. The center of the flap is humped, so the envelope fails to be flush against the end fence.

    [A]: End fence

  3. The flap is thinner than other parts of the envelope, so the height of the tray is prone to be higher than the paper exit roller as more envelopes are stacked. The angle of paper delivery becomes steep, resulting in increased resistance, and failure to deliver the envelope.

    [A]: End fence

Solution:

Using the Z-fold support tray changes the position of the leading edge of the envelope to be delivered to the output tray, and this may help in reducing the problem of the trailing edge remaining.

However, the Z-fold support tray cannot be attached if Extension Vacuum Feed Banner Sheet Tray Type S14 is attached to Finisher Shift Tray 1.

Also, note the following when attaching the Z-fold support tray.

  • The accuracy of printed paper alignment is not guaranteed.

  • The maximum stackable number of envelopes is 30. (Remove the stacked envelopes from the output tray when their number reaches 30.)