Neopost DS-75i Manual page 68

6. Move the side guides towards the envelopes.
The space between the side guides and the envelopes should be such that the
envelopes have just enough play to move freely.
7. Shift the envelope support in or out. The top side of the envelope must touch the
dotted line on the support.
5
8. Turn the envelope support to distribute the weight of the envelopes evenly on both
sides.
64
If the distance between the side guides is too large, the envelopes
will twist sidewards, when transported into the machine.