Appeal No. 1998-0244
Application No. 08/531,890
THE INVENTION
The invention relates to “a process for the continuous
production of transdermal therapeutic patches having a backing
layer, a pressure-sensitive adhesive drug-reservoir-layer, and
a removable protective layer, wherein the loss of active
substance caused by production is minimized” (specification,
page 1). Claim 3 is illustrative and reads as follows:
3. A process for the continuous production of transdermal
therapeutic patches having a backing layer, a pressure-
sensitive adhesive drug-reservoir-section and a removable
protective layer, in which the loss of drug during fabrication
is minimized, comprising the steps of
providing a laminate which is present in a tape form and
comprises a pressure-sensitive adhesive drug-free backing
layer and a removable protective layer,
inserting individual quadrangular pressure-sensitive
adhesive drug-reservoir-sections lengthwise one after the
other between the layers, the clearance between said drug-
reservoir-sections in longitudinal direction remaining
constant and the width thereof being dimensioned such that
said backing layer and said removable protective layer project
beyond said drug-reservoir-section at all sides thereof,
whereafter the pressure-sensitive adhesive drug-free backing
layer is cut by punching in such a manner that the punching
line surrounds the external dimensions of the individual drug
reservoir sections,
removing the resulting latticed refuse of the drug-free
pressure sensitive adhesive backing layer, and
then cutting the protective layer in the resultant spaces
between the drug-reservoir-sections.
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