Appeal No. 96-0353
Application 08/099,220
application.
THE INVENTION
Appellants’ claimed invention is directed toward a method
for joining at least two translucent sign face substrates by
use of a seam tape which contains a scrim embedded in
thermoplastic material, wherein the seam tape is applied to
adjoining regions of the substrates by use of heat and
sufficient pressure to wet out the fibers of the seam scrim,
i.e., to cause the thermoplastic material to flow around and
intimately wet and encapsulate the fibers (specification, page
4, lines 17-24). Claim 7 is illustrative and reads as
follows:
7. A method of joining at least two translucent sign
face substrates with a seam tape to form a seam having a
transmissive optical density within ±50% of the transmissive
optical density of the sign face substrate when the sign face
is illuminated from behind the sign face substrate, said
method comprising the steps of:
(a) providing at least two sheets of sign face material,
such that each sheet comprises a composite of two layers of a
thermoplastic material and a scrim layer sandwiched between
the two layers of thermoplastic material;
(b) aligning said two sheets such that an edge of each
sheet is in an adjoining position and defines an adjoining
region without any gaps between the adjoining sheets of sign
face material;
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