LaserWriter customers who experience continuous paper jams when trying to use the optional envelope cassette may have accidentally left two plastic shipping inserts in place. Temporarily remove the envelope cassette from the printer and inspect the left and right side of the cassette interior to see whether two ivory colored plastic pieces are wedged into place. The plastic pieces are approximately 2 5/8 inches x 1 inch x 3/8 inch (67mm x 25mm x 10mm) in size. See Figure 1 below.
Figure 1: LaserWriter 8500 Envelope Cassette with shipping inserts in place.
If the plastic pieces are present, gently pull the top of each plastic shipping insert toward the front of the cassette until they release. Once removed, the shipping inserts can be discarded. See Figure 2 below.
Figure 2: Close-up View of Shipping Insert
If the paper jam conditions continue, refer to the LaserWriter 8500 user's manual for additional troubleshooting assistance.