HP 4300n HP LaserJet 4200 and 4300 series printer - User Guide - Page 193

Note Envelopes Envelope construction Envelope construction is critical. Envelope fold lines can vary considerably, not only between manufacturers, but also within a box from the same manufacturer. Successful printing on envelopes depends upon the quality of the envelopes. When selecting envelopes, consider the components listed below. Many envelope manufacturers are now making envelopes optimized for laser printers.
Weight: The weight of the envelope paper should be 75 to 105 /m2 (20 to 28 lb), or jamming might result.
Construction: Prior to printing, envelopes should lie flat with less than 6 mm (0.25 inch) curl, and should not contain air. (Envelopes that trap air might cause problems.)
Condition: Make sure that envelopes are not wrinkled, nicked, or otherwise damaged.
Sizes in tray 1: Standard and custom sizes from 76 by 127 mm (3 by 5 inch) to 216 by 356 mm (8.5 by 14 inch).
Sizes in the optional envelope feeder: Standard sizes from Monarch (#7-3/ 4) (98 by 191 mm, or 3.9 by 7.5 inch) to B5 (ISO) (176 by 250 mm, or 6.9 by 9.8 inch). If you do not have an optional envelope feeder, always print envelopes from tray 1. (See "Printing envelopes" on page 51.) To print envelopes with the optional envelope feeder, see "Feeding envelopes automatically (optional envelope feeder)" on page 53. If envelopes curl, try opening the rear output bin. Envelopes with double-side-seams Double-side-seam construction has vertical seams at both ends of the envelope rather than diagonal seams. This style might be more likely to wrinkle unless properly constructed. Be sure the seam extends all the way to the corner of the envelope. 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 jams. Envelope margins The following table gives typical address margins for a Commercial #10 or DL envelope. Type of address Return address Delivery address Top margin 15 mm (0.6 inch) 51 mm (2 inch) Left margin 15 mm (0.6 inch) 89 mm (3.5 inch) For the best print quality, position margins no closer than 15 mm (0.6 inch) from the edges of the envelope. Envelope storage Proper storage of envelopes helps contribute to good print quality. Envelopes should be stored flat. If air is trapped in an envelope, creating an air bubble, then the envelope might wrinkle during printing. ENWW Paper specifications 191