Envelopes with peel-off strips.
Poorly manufactured envelopes, including bulging envelopes or envelopes that
are not square and straight.
Envelopes with treated surfaces that might discolour, melt, or emit fumes
when exposed to temperatures of up to 200 C.
Envelopes with gummed edges.
Envelopes with self-stick adhesives.
7-6
Manual Feed of Paper/Envelopes/etc...
Chapter 7