User`s guide

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Envelope Construction An envelope with good construction has a leading edge that
enters the printer straight and a sharp, well-creased fold, having
no more than two thicknesses of paper. A poorly constructed
envelope has edges folded smaller than normal, causing a thick
leading edge near a corner. This baggy construction can cause
the envelope to buckle as it passes through the printer, resulting
in a wrinkled envelope or a paper jam.
CAUTION: Never use envelopes having clasps, snaps,
windows, or synthetic materials. These items can cause
severe printer damage.
Good Envelope Construction
Poor Envelope Construction
E-10 Paper Facts