HP 2100 TN - Manual (Page 158)

146 Appendix B Media Specifications EN
Envelopes with Double Side Seams
Double side-seam construction has vertical seams at both ends of the
envelope rather than diagonal seams. This style may be more likely to
wrinkle. Be sure the seam extends all the way to the corner of the
envelope as illustrated below.
Envelopes with Adhesive Strips or Flaps
Envelopes with a peel-off adhesive strip or with more than one flap
that folds over to seal must use adhesives compatible with the heat
and pressure in the printer. The extra flaps and strips might cause
wrinkling, creasing, or even jams and may even damage the fuser.
Correct
Incorrect