||HP LaserJet 4200, 4200dtn, 4200dtns, 4200dtnsl, 4200n, 4200tn, 4300, 4300dtn, 4300dtns, 4300dtnsl, 4300n, and 4300tn
||The envelope feeder is inserted in Tray 1 after removing the envelope entrance cover inside the printer (Note: do not throw away the cover, replace when the envelope feeder isn't installed).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.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 x 127 mm (3 x 5 inches) to 216 x 356 mm (8.5 x 14 inches).Sizes in the optional envelope feeder: Standard sizes from Monarch (#7-3/4) (98 x 191 mm, or 3.9 x 7.5 inches) to B5 (ISO) (176 x 250 mm, or 6.9 x 9.8 inches).Holds up to 75 envelopes to make business mailing simple and efficient.Maximize productivity in your home office or small business.Print professional-looking envelopes fast and conveniently.