Security seal for containers
AssigneePfizer Inc.
InventorRichard G. Shoemaker
Life of this patent
Estimating the term…
Abstract
A security seal is described which can be used to protect the closure device of a container so that a subsequent opening of the container will be evident. The seal comprises a strip of resilient plastic film with patches of a tamper-resistant adhesive at each end, leaving an adhesive-free gap in between. The seal is applied so that the adhesive patches adhere to the container to keep the adhesive-free section flexed closely over and spanning the closure device. Thus, when cut to release the closure part, the strip flexes outward to produce easily noticed loose ends.
Claims5
A security seal for a container closure device comprising a strip of resilient plastic film whose lengthwise dimension exceeds the width of said closure device, said strip having on the inner surface thereof a coating of tamper-resistant adhesive, said coating having an adhesive-free gap intermediate the ends thereof, the length of said gap being at least equal to the width of said closure device, whereby said strip may be adherently fixed to said container across said closure device with said adhesive-free gap held closely over said closure device and under convex flexural tension.
A method of sealing a container to render evident the subsequent opening thereof, said method comprising adherently affixing to said container and across the container closure device a strip of resilient plastic film, said strip having on the inner surface thereof a coating of tamper-resistant adhesive, said coating having an adhesive-free gap intermediate the ends thereof, the length of said gap being at least equal to the width of said closure device, said strip being affixed to said container so that said adhesive-free gap is held closely over said closure device and under convex flexural tension.
Dependencies are inferred from the claim text.