Oki ES3640E User Manual page 36

4. Fan the paper to be loaded then tap the edges of the stack
on a flat surface to make it flush.
5. Load the paper.
> For single-sided printing on letterhead, load the paper
into the multi-purpose tray with pre-printed side up
and top edge into the printer unit.
> For two-sided (duplex) printing on letterhead, load the
paper with pre-printed side down and top edge away
from the printer unit.
> Envelopes should be loaded face-up with long edge
into the printer. Do not select duplex printing on
envelopes.
> Do not leave space between the paper and the guides.
> Do not exceed the paper capacity of approximately 230
sheets, 100 transparencies or 25 envelopes. Maximum
stacking depth is 25mm.
ES3640e MFP User's Guide> 36