Brother HL-2400Ce Series User Manual page 62

USER'S GUIDE
3–12
Before loading envelopes in the cassette, check the following:
• Envelopes should have a lengthwise sealing flap.
• The sealing flaps should be crisply and correctly folded
(irregularly cut or folded envelopes may cause paper jams).
• Envelopes should consist of two layers of paper in the
following marked area.
Feeding Direction
Fig. 3-4 Envelopes
• Envelope joints that are sealed by the manufacturer should be
secure.
• All sides should be properly folded without any wrinkles or
creases.
• Print quality may vary between different style envelopes. It is a
good idea to test the envelopes you wish to use prior to
purchasing large quantities.