Tamper-revealing sealing device for packaged documents

Details Tamper-revealing sealing device for packaged documents Tamper-revealing sealing device for packaged documents

1993-07-02

1994-05-17

Ryan, Patrick J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having a component wherein a constituent is liquid...

428 40, 4284022, 428905, 428916, 206807, B32B 900

Patent

active

053126807

ABSTRACT:
Stain-loaded seals and stain-free seals for packaged documents bear matching, identifying numbers or like symbols on their upper surfaces, respective coatings of adhesive on their lower surfaces, and respective peelable sheets of backing material covering their adhesive layer. The stainloaded seal bears one or more frangible containers of staining material which is released if there is an attempt to remove the seal after the seal is adhered to a substrate. The stainfree seal is adhered to an envelope or package as a seal so that any attempt to open the package or envelope will result in tearing of the seal and thereby evidence that the package or envelope has been opened.

REFERENCES:
patent: 3896965 (1975-07-01), Cornell
patent: 4121003 (1978-10-01), Williams
patent: 4516679 (1985-05-01), Simpson et al.
patent: 4608288 (1986-08-01), Spindler
patent: 4720423 (1988-01-01), Fraser
patent: 4986429 (1991-01-01), Singleton, Jr.

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