Permanent seal legal envelope

Details Permanent seal legal envelope Permanent seal legal envelope

2006-11-14

2010-12-14

Elkins, Gary E (Department: 3782)

Envelopes, wrappers, and paperboard boxes

Envelope

Closures

C206S807000, C229S080000, C428S034300, C428S916000

Reexamination Certificate

active

07850063

ABSTRACT:
A tamper evident envelope is disclosed which includes sealing strips located within the seams of the envelope. Each strip is formed by two clear plastic strips secured together. One of the clear plastic strips includes a groove and a dye located within the groove whereby the dye is sealed between the two clear plastic strips. When a seam is separated, the sealing strip is damaged thereby releasing the dye onto the adjacent portions of the envelope and providing visual evidence that the seam was opened. A second embodiment is disclosed where the dye is omitted and separation of the secured clear plastic strips results in damage to the envelope providing visual evidence of tampering.

REFERENCES:
patent: 4838708 (1989-06-01), Holcomb et al.
patent: 5060848 (1991-10-01), Ewan
patent: 5082702 (1992-01-01), Alband
patent: 5294470 (1994-03-01), Ewan
patent: 5582887 (1996-12-01), Etheredge
patent: 6471058 (2002-10-01), Kannabiran et al.
patent: 2005/0145683 (2005-07-01), Alagna et al.
patent: 2280402 (1995-02-01), None

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