Appeal 2007-2181
Application 10/261,862
temperature and then its opposing surface at a second temperature (id., 5:10-
14).
In one embodiment, described in Example 1 of the specification,
aramid paper A was calendered between two rolls with one roll operating at
a surface temperature of 360oC and the other roll operating at a surface
temperature of 300oC (id., 6:22-24). The surface of paper A contacted with
the lower temperature roll was said to be more porous than the surface
contacted with the higher temperature roll (id., 6:24-27). A heated press
operating at 288oC was used to laminate a layer of poly(ethylene
terephthalate) polyester (PET) polymer between two sheets of differentially
calendered paper A with the polymer contacting the more porous surface of
each sheet of calendered aramid paper (id., 7:9-11).
2. Representative claim
Claim 1 is illustrative of the subject matter on appeal.
1. A process for forming a laminate comprising
in order
a layer of an aramid paper,
a layer of polymer and
a layer of an aramid paper
comprising the steps of
a) calendering an aramid paper between
two heated rolls which differ by a temperature of
at least 20 degrees centrigrade wherein a surface of
the paper exposed to a lower roll temperature is
more porous than an opposite surface exposed to a
higher roll temperature,
b) calendering an aramid paper between
two heated rolls which differ by a temperature of
at least 20 degrees centrigrade wherein a surface of
the paper exposed to a lower roll temperature is
more porous than an opposite surface exposed to a
higher roll temperature,
3
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Last modified: September 9, 2013