Brother HL1060 - B/W Laser Printer Service Manual page 152

USER'S GUIDE
CHAPTER 2 –4
The following types of envelopes are not recommended for use.
Damaged, curled, wrinkled, or irregularly shaped envelopes
Extremely shiny or highly textured envelopes
Envelopes with clasps
Envelopes with self-adhesive closures
Envelopes of baggy construction
Envelopes not sharply creased
Embossed envelopes
Envelopes already printed by a laser printer
Envelopes pre-printed on the inside
Envelopes that cannot be arranged uniformly when placed in a pile
Fig. 2-2 Envelopes
Printable Area The figure below shows the physically printable area.
(Except 9"x12" envelope)
Unprintable area
Approximately 4 mm(0.16 inch) for any sizes of paper
Fig. 2-3 Printable Area