초록 ▼

A tamper-proof seal employed with a container comprising a plurality of frangible cells filled with a harmless colored substance. The cells may either be located between two hermetically sealed plastic sheets or formed on the exterior of the seal and upon puncturing or applying pressure necessary fo

A tamper-proof seal employed with a container comprising a plurality of frangible cells filled with a harmless colored substance. The cells may either be located between two hermetically sealed plastic sheets or formed on the exterior of the seal and upon puncturing or applying pressure necessary for entry into the container the cells rupture releasing the substance to provide a visual indication that tampering with the container may have occurred.

대표청구항 ▼

A tamper-proof seal for sealing a container comprising, in combination, a hermetically sealed frangible envelope, a chamber defined within said envelope, a transparent portion defined in said envelope, a sub-atmospheric pressure within said envelope, indicating means within said chamber having a fir

A tamper-proof seal for sealing a container comprising, in combination, a hermetically sealed frangible envelope, a chamber defined within said envelope, a transparent portion defined in said envelope, a sub-atmospheric pressure within said envelope, indicating means within said chamber having a first visible condition at said sub-atmospheric pressure and a second visible condition at a pressure greater than said sub-atmospheric pressure visibly discernibly different than said first condition whereby fracture of said envelope may be visibly ascertained. A tamper-proof seal employed with a container having a neck and a cap receivable thereon comprising, in combination, a sheet of plastic material tightly affixed to the cap and neck of the container, said sheet of material including a plurality of elongated individual frangible cells, each of said cells extending between the cap and neck and fixed with respect to the cap and to the neck and each filled with a colored visible indicating substance such that when the cap is removed from the neck of the container said cells rupture releasing said indicating substance.