Envelope with concealed message window

Details Envelope with concealed message window Envelope with concealed message window

1984-06-06

1986-07-01

Spruill, Robert L.

Printed matter

Calendar

283100, 283102, 283901, 283 56, 229 71, G09B 2900, B42D 1500

Patent

active

045975914

ABSTRACT:
An envelope and blank structure is disclosed for use with promotional mailings. The envelope includes at least one window opening in its front panel which is normally covered by a sheet of transparent window material. The outer surface of the window material is in turn applied with a non-transparent coating for obscuring a message included within the envelope beneath the window opening. The message may subsequently be revealed without opening the envelope by scratching or rubbing the coating from the window material.

REFERENCES:
patent: 2035218 (1936-03-01), Bloom
patent: 2210879 (1937-05-01), Cahoon et al.
patent: 2678769 (1954-05-01), David
patent: 2887327 (1959-05-01), Tucker
patent: 3181774 (1963-10-01), Littman
patent: 3455575 (1969-07-01), Seidman

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