DEC 220240 - 5.2 Envelope Requirements

5.2 Envelope Requirements
Envelopes must meet the same specifications as paper (see Table 5–2). In
addition, the following types of envelopes cannot be used with the printer:
• Envelopes with sealing flaps that are open
MLO-005731 (Figure 5-1; 14. picas)
5–4 Operator’s Guide