Return mailer in place of flip window

Details Return mailer in place of flip window Return mailer in place of flip window

1987-11-25

1989-03-07

Marcus, Stephen

Envelopes, wrappers, and paperboard boxes

Envelope

Compartment

229 69, 229 71, B65D 2706

Patent

active

048099066

ABSTRACT:
A business form assembly is provided in which the outer or top sheet is formed with a substantially rectangular window, which must be closed at the completion of the manufacturing stage. To this end, a patch or cover sheet with dimensions slightly larger than the window, is temporarily attached, by pressure sensitive adhesive, to the sheet next adjacent the top sheet but in overlying relationship with the window. The underside of the top sheet is provided with a heat activated adhesive pattern about the periphery of the window and facing the patch or cover. When the form is substantially complete, heat is applied to activate the various lines of adhesive utilized in the form, and including the pattern about the periphery of the window. In this manner, the patch or cover becomes permanently attached to the underside of the top sheet, and is easily removed from the adjacent sheet since the heat activated adhesive is stronger than the pressure sensitive adhesive.

REFERENCES:
patent: 1307421 (1919-06-01), Schramm
patent: 3273785 (1966-09-01), Beckman et al.
patent: 3380648 (1968-04-01), DeLyra
patent: 3693869 (1972-09-01), Eaves, Jr.
patent: 3837565 (1974-09-01), Johnsen
patent: 4598860 (1986-07-01), Pennock
patent: 4706877 (1987-11-01), Jenkins
patent: 4709850 (1987-12-01), Wagner
patent: 4715530 (1987-12-01), Leese et al.

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