Epson DLQ-3500 Reference Manual page 10

Continuous
paper *
Single
sheets **
* Continuous paper includes labels, multipart forms, continuous forms with
labels, overlapping multipart forms, and overlapping multipart forms with
labels.
** Single sheets include envelopes, postcards, and single-sheet multipart forms.
You can use only single-sheet multipart forms that are glued at the top of
the forms in the optional cut sheet feeder.
1-4
Paper Handling
Paper path
Tractor
Paper guide or automatic sheet
alignment unit (option)
Cut-sheet feeder (option)
Paper source
selection
Tractor
Manual/CSF
Manual/CSF