HP 2420 Service Manual - Page 28

NOTE Envelopes 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 following components: ● Weight: The weight of the envelope paper should not exceed 105 g/m2 (28 lb) or jamming might occur. ● Construction: Prior to printing, envelopes should lie flat with less than 6 mm (0.25 inch) curl, and should not contain air. ● Condition:Envelopes should not be wrinkled, nicked, or otherwise damaged. ● Temperature: You should use envelopes that are compatible with the heat and pressure of the printer. ● Size: You should use only envelopes within the following size ranges. ● Minimum: 76 x 127 mm (3 x 5 inches) ● Maximum: 216 x 356 mm (8.5 x 14 inches) Use only tray 1 to print envelopes. You might experience some jams when using any media with a length less than 178 mm (7 inches). This might be caused by paper that has been affected by environmental conditions. For optimum performance, make sure you are storing and handling the paper correctly (see Printing and paper storage environment). Choose envelopes in the printer driver (see Printer drivers). 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. Be sure the seam extends all the way to the corner of the envelope as illustrated below. 1 2 1 Acceptable envelope construction 2 Unacceptable envelope construction 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 might even damage the fuser. 14 Chapter 1 Product Information ENWW