Envelopes, Types of envelopes to avoid, Important – Brother Fax Machine/Multi-Function Center MFC-9125CN User Manual
Page 37

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Envelopes
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Most envelopes will be suitable for your 
machine. However, some envelopes may 
have feed and print-quality problems 
because of the way they have been made. A 
suitable envelope should have edges with 
straight, well-creased folds and the leading 
edge should not be thicker than two sheets of 
paper. The envelope should lie flat and not be 
of baggy or flimsy construction. You should 
buy quality envelopes from a supplier who 
understands that you will be using the 
envelopes in a laser machine.
Envelopes can only be fed from the Manual 
feed slot. We recommend that you print a test 
envelope to make sure the print results are 
what you want before you print or purchase a 
large quantity of envelopes.
Check the following:
Envelopes should have a lengthwise 
sealing flap.
The sealing flaps should be folded crisply 
and correctly (irregularly cut or folded 
envelopes may cause paper jams).
Envelopes should consist of two layers of 
paper in the area circled in the figure 
below.
1 Feeding direction
Envelope joints that are sealed by the 
manufacturer should be secure.
We recommend that you do not print 
within 0.6 in. (15 mm) of the edges of 
envelopes.
Types of envelopes to avoid
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IMPORTANT
DO NOT use envelopes:
• that are damaged, curled, wrinkled or
an unusual shape
• that are extremely shiny or textured
• with clasps, staples, snaps or tie
strings
• with self-adhesive closures
• that are of a baggy construction
• that are not sharply creased
• that are embossed (have raised writing
on them)
• that were previously printed by a
laser/LED machine
• that are pre-printed on the inside
• that cannot be arranged neatly when
stacked
• that are made of paper that weighs
more than the paper weight 
specifications for the machine
• with edges that are not straight or
consistently square
• with windows, holes, cut-outs or
perforations
• with glue on surface as shown in figure
below
• with double flaps as shown in figure
below
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