Envelopes – wrappers – and paperboard boxes – Envelope – Series
Patent
1994-10-04
1995-12-12
Pascua, Jes F.
Envelopes, wrappers, and paperboard boxes
Envelope
Series
229 80, 229 71, B65D 2710, B65D 2716, B65D 2704
Patent
active
054742293
ABSTRACT:
The present invention relates to a stack of pressure sensitive adhering envelopes wherein each envelope can be easily removed from the stack and used without having to moisten the flap. The flaps of the envelopes are treated on the back side with a release coating and on the front side with a pressure sensitive adhesive so that when the envelopes are stacked with the flaps open, the adhering interface between the pressure sensitive adhesive and the release coating is not permanent. Each envelope in the stack can be easily removed from the stack and sealed by folding the flap onto the body portion of the envelope and applying a slight pressure onto the flap. No release tape is required because each adjacent envelope is treated with the release coating.
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patent: 2087410 (1937-07-01), Lane et al.
patent: 2114380 (1938-04-01), Heywood
patent: 2217949 (1940-10-01), Heywood
patent: 2384223 (1945-09-01), Wilbur
patent: 3372861 (1968-03-01), Johnson et al.
patent: 3508949 (1970-04-01), Grossman et al.
patent: 4633508 (1986-12-01), Sanders
patent: 5041072 (1991-08-01), McClelland
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