Epson Action Laser II - Manual (Page 171)

The paper feeds but then jams at the paper eject area.
There may be too much paper in the output tray. Never let more
than 50 sheets accumulate in the face-down output tray on top of
the printer.
Printed pages
curl
too much and are not placed in the output tray
properly.
Your paper may be moist or damp. Printing is sensitive to
moisture absorbed by the paper. Do not store your paper in a
humid or damp environment.
You may not be using the correct type of paper for your printer.
Smooth, high-quality copier paper is recommended for best
results. See Chapter 5 for more on choosing paper.
Most paper has a natural “curl” that may be emphasized when
the paper is run through a laser printer. One side of the paper
tends to curl more than the other side. Turn the stack of paper
over in your paper cassette and try printing again. As a rule,
your ream of paper displays an arrow on one end to show the
side of the paper that is best for printing. Make sure the “best”
print side is fed face down into the printer.
Thin paper creases.
Use the Special paper setting. See page 5-6 for instructions.
Poor quality paper can cause paper feeding errors of this type.
Make sure your paper supply is not too thin or rough. See
Chapter 5 for more information on the types of paper that can be
fed automatically and the types that require manual feeding.
Paper Handling
7-26 Troubleshooting