Apple LaserWriter 12/640 PS - Manual (Page 211)

Filling the optional envelope cassette
1 Slide the envelope cassette out of the 500-sheet feeder.
2 Move the postcard guide to the back of the envelope cassette, if necessary.
To remove the postcard guide from the envelope tray, pinch the indented area
against the front of the guide. Roll the guide toward the front of the envelope
cassette and lift up.
To insert the postcard guide in the back of the envelope cassette, tilt the guide
toward the front of the envelope cassette and insert the two tabs located on
front of the guide into the slots. Roll the guide until its back is against the
back of the envelope cassette and locks into place.
3 Push down gently on the envelope tray until it rests against the bottom of the cassette
and locks into place.
4 Lift the back of the envelope cassette and move the length guide until it matches your
envelope’s length. Make sure the tab fits into the marked slots.
The cassette is marked with positions for envelopes of Comm10, C5, DL, and
Monarch sizes.
5 Pinch the color tab (located on the right side of the envelope cassette) against the post
and move the envelope width to its maximum setting.
6 Insert the envelopes into the cassette with the flap side up and the top edge to the right.
Adjust this guide to fit the
length of the envelopes.
Adjust the width guide here.
Make sure the envelopes are
under this roller.
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