Appeal No. 2005-1472 Page 2
Application No. 09/750,984
BACKGROUND
Appellants' invention relates to an adhesive tape and a
method of using such a tape for detecting unauthorized broaching
of a package. The tape includes an oriented, co-extruded, multi-
layer polypropylene film composite backing wherein one side of
the film is coated with an adhesive layer that has a bond
strength greater than the cleavage strength of the composite
backing. Exemplary claims 1 and 10 are reproduced below.
1. An adhesive tape comprising a composite backing
based on an oriented, coextruded, at least two-layer
polypropylene film whose one side is provided with an
adhesive layer wherein the cleavage strength of the
composite backing is less then the bond strength of the
adhesive.
10. A method for detecting unauthorized broaching
of a package, which comprises sealing said package with
the adhesive tape of Claim 1, wherein when the adhesive
tape is removed from the surface of a package the
adhesive tape is irreversibly destroyed and indicates
an attempted broaching by tearing or splitting in the
thickness direction.
In addition to alleged admitted prior art, the prior art
references of record relied upon by the examiner in rejecting the
appealed claims are:
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