Browse Prior Art Database

Tamper Indicative Seal

IP.com Disclosure Number: IPCOM000039865D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Haddow, BA: AUTHOR [+2]

Abstract

A sealant composition for use in detecting movement between adjoining surfaces of a housing, such as a housing for electronic equipment, is described. The sealant comprises an adhesive, polymeric or paint base in combination with a fluorescent chemical detectable under ultraviolet (UV) light. The sealant composition is applied to the adjoining surfaces in conventional manner to provide a continuous film over the joint, such that tampering with the housing, i.e., opening or attempting to open the housing, causes fracture of the seal between the adjoining surfaces. Visual inspection of the seal under UV light reveals whether the sealant has been replaced. In a preferred embodiment the sealant comprises a mixture of fluorescent materials.

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Tamper Indicative Seal

A sealant composition for use in detecting movement between adjoining surfaces of a housing, such as a housing for electronic equipment, is described. The sealant comprises an adhesive, polymeric or paint base in combination with a fluorescent chemical detectable under ultraviolet (UV) light. The sealant composition is applied to the adjoining surfaces in conventional manner to provide a continuous film over the joint, such that tampering with the housing,
i.e., opening or attempting to open the housing, causes fracture of the seal between the adjoining surfaces. Visual inspection of the seal under UV light reveals whether the sealant has been replaced. In a preferred embodiment the sealant comprises a mixture of fluorescent materials. The UV fluorescence spectrum of the mixture is recorded and used as a standard for future comparisons. Reproduction of the 'fingerprint' obtained using the sealant would be difficult in the absence of sophisticated analysis equipment or knowledge of the mixture. The sealant may be also used to seal screws by filling the slot in the screw to prevent insertion of a screwdriver blade or to cement clips in place. One particular method of using the sealant to bridge a seam in a housing involves molding a recess across the seam to be sealed and fixing a security paper seal across the seam with the sealant. The fragile security paper is protected by pressing a polycarbonate window into the recess so that it sticks t...