HP LaserJet 4250 - Manual (Page 73)

To install the optional envelope feeder
1. Open tray 1.
2. Remove the plastic envelope-entrance cover from the printer.
3. Insert the optional envelope feeder firmly into the printer until it latches into position. Pull
outward on the optional envelope feeder to be sure that it is securely in place.
Removing the optional envelope feeder
Use these steps to remove the optional envelope feeder from the printer.
To remove the optional envelope feeder
1. Press the release button that is located on the left side and pull the optional envelope
feeder away from the printer.
ENWW Printing envelopes 61