Tamper detection envelope

Details Tamper detection envelope Tamper detection envelope

1985-04-02

1986-01-28

Garbe, Stephen P.

Envelopes, wrappers, and paperboard boxes

Envelope

Closures

206807, B65D 2714, B65D 2730

Patent

active

045666270

ABSTRACT:
A tamper detection envelope is disclosed wherein the closure flap of the envelope is applied with a pattern of spaced slits to produce a weakened structure that will break during tampering and be obvious under visual observation. The spaced slits are separated by normally unbroken connectors and are arranged in generally parallel lines that criss cross one another at substantially right angles to produce subpanels of a generally diamond configuration within the closure flap. A strip of adhesive is applied between the closure flap and the envelope rear panel at least in the region of the subpanels for closing the envelope. Any subsequent attempt to open the envelope by lifting the closure flap will break the normally unbroken connections between the slits to provide a visual indication that the envelope has been tampered with.

REFERENCES:
patent: 190630 (1877-05-01), Simonson
patent: 257352 (1882-05-01), Lubin
patent: 544277 (1895-08-01), Andrew
patent: 712465 (1902-10-01), Stormfels
patent: 1198288 (1916-09-01), Taylor, Jr.
patent: 2083158 (1937-06-01), Ramsey
patent: 2128196 (1938-08-01), Vogel

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