IBM 1725 SLS - Manual (Page 113)

Tray Chaining
3-11 Daily Operations
slot as shown in the following illustration, with the face up and the flap
side toward the left manual feed guide.
Because envelopes pass through heated rollers, the gummed area
on the flap may seal. Open the flap immediately after it passes
through the printer, before the seal cools. You may then reseal in the
normal manner. The use of envelopes with emulsion-based glue
avoids this problem.
» Note: Before printing envelopes, disable the duplexer if it is installed and
check the manual feed guides to make sure they’re not too tight and
buckling the envelopes. Also, make sure envelopes meet specifications listed
in appendix B, “Technical Specifications.” If envelopes curl excessively, use
the face-up output bin at the rear of the printer.
The Optional Envelope Feeder
To load up to 100 envelopes at a time, use the optional envelope
feeder. Instructions for installation and use are in chapter 8, “Printer
Options.” See your QMS vendor for more information on the optional
envelope cassette.
Tray Chaining
This printer has two cassettes (also known as trays or input bins) for a
total media capacity of approximately 1000 sheets before a reload is
Manual feed guides