(57) Method and apparatus are provided for forming an envelope wherein front (38) and
rear panels (40) of an envelope are incorporated in continuous or discrete webs or
sheets (10,20). Heat activatable adhesive (54,56,58) is applied to three peripheral
edge portions (26,28,42) of one of the envelope panels (148) in facing engagement
with the other of the panels (38). The webs or sheets (10,20) are fixed together and
fed into a printing machine (72) such as a table or desk top laser printer (72) wherein
the heat fusing rolls (76,78) of the printer (72) are utilized to activate the heat
activatable adhesive (54,56,58) to thereby secure the envelope panels (38,48) together
to form an envelope pocket. One of the envelope panels (38) incorporates a sealing
flap portion (40) which may be provided with a rewettable adhesive pattern (50), while
the facing portion of the opposed sheet (20) may be provided with an antistick composition
(52) to prevent premature sticking between the sheets (10,20) in the area of the sealing
flap (40).
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