Canon BJC-4400 - Manual (Page 40)

3-14 Paper Handling Chapter 3
Printing on Envelopes
You can stack up to 15 envelopes in the sheet feeder or you can manually
feed envelopes one at a time.
U.S. Commercial number 10 (COM10) envelopes and European DL
envelopes are recommended. You may be able to stack envelopes of
other sizes in the sheet feeder; however, Canon cannot guarantee
consistent performance on envelope sizes other than COM10 and DL.
The following envelopes are not recommended because they may cause
jams or smears, or may damage your printer.
❍ Envelopes with windows, holes, perforations, cutouts, and
double flaps.
❍ Envelopes made with special coated paper or deeply
embossed paper.
❍ Envelopes using peel-off sealing strips.
❍ Envelopes in which letters have been enclosed.
When you are ready to print on envelopes, follow these steps to stack
envelopes in the sheet feeder. (You can also manually feed envelopes one
at a time.)
❍ Make sure that the paper thickness lever is set to the
right (A).
Set the paper
thickness lever.