A.8 APPENDIXDouble side-seams construction has vertical seams at both endsof the envelope rather than diagonal seams. This style may bemore likely to wrinkle. Be sure the seam extends all the way tothe corner of the envelope as illustrated below.Envelopes withDouble Side SeamsEnvelopes with a peel-off adhesive strip or with more than oneflap that folds over to seal must use adhesives compatible withthe heat and pressure in the printer. The extra flaps and stripsmight cause wrinkling, creasing, or even jams and may evendamage the fuser.Envelopes withAdhesive Strips orFlapsThe following gives typical address margins for a commercial#10 or DL envelope.Envelope MarginsProper storage of envelopes helps contribute to print quality.Envelopes should be stored flat. If air is trapped in an envelope,creating an air bubble, then the envelope may wrinkle duringprinting. See “Printing on Envelopes” on page 4.9.Envelope StorageCorrectIncorrectTop marginType of AddressReturn addressDelivery addressLeft margin51 mm (2 in.)15 mm (0.6 in.)89 mm (3.5 in.)51 mm (2 in.)Notes:• For best print quality, position margins no closer than 15 mm(0.6 in.) from the edges of the envelope.• Avoid printing over the area where the envelope’s seams meet.Paper Specifications