QMS 2425 Operation Manual page 37

5 Slide the envelope stack into the printer as far as it will go, with
the print side facing up and the flap should be on your right.
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 it in the usual manner. The use of envelopes with emul-
sion-based glue avoids this problem.
To load up to 100 envelopes at a time, use the optional envelope
feeder. Instructions for installing and using it are in chapter 6, "Media
Input," in the Options guide. See your QMS vendor for more informa-
tion on the optional envelope feeder.
Characters and images are created in your laser printer through a
process that applies toner (made of carbon particles) to the page in
the printer's fusing unit. When an image is formed, a positive electri-
cal charge is applied to transfer the image to the page. The toner car-
tridge contains the toner and the photosensitive drum needed to
operate the laser printer. The photosensitive drum has characteristics
similar to those of photographic film.
The toner cartridge contains enough toner to print about 15,000 let-
ter/A4-size pages at normal (4%) page coverage. If the printer is run
entirely in Conserve Toner mode (Administrator/Engine/Conserve
Toner menu), a toner cartridge lasts for over 52,500 letter/A4-size
pages at normal (4%) page coverage.
When the cartridge toner supply runs low, the printer message TONER
LOW displays. Usually, parts of the page print lighter. It is your option
whether or not to continue printing when the engine senses it is low of
toner.