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Open the flaps, and load the envelopes with their flaps pointing to the right side of the paper tray.
Before loading envelopes, press down on them to remove any air inside and flatten edges or creases.
Straighten curled or warped envelopes before loading (keep the amount of curling or warping for each envelope within 5 mm).
Set the envelopes so that the difference in the height of the stacks is less than 10 mm.
If a paper jam occurs, load 5 more envelopes.
When loading an envelope that has an self-adhesive flap and releasing paper, make sure the releasing paper is not curled or peeled off.
