Appeal No. 2001-0394
Application 09/012,508
BACKGROUND
The invention relates to a method and apparatus for
application of a coating onto a traveling material web. Appeal
Brief, Paper No. 15, received March 3, 2000, page 2, Summary of
Invention. The invention is applicable to direct application
methods wherein the coating material is applied by an applicator
directly onto the surface of a traveling material web which is
backed by a revolving counter surface such as a backing roll.
Specification, page 1, lines 17-21. The invention is also
applicable to an indirect application of a coating wherein the
coating is first applied onto a substrate surface such as the
surface of a backing roll configured as an applicator roll and
then transferred from the applicator roll to the material web
in a nip through which the material web passes. Id., page 1,
line 21 - page 2, line 2. According to appellant, a drawback of
conventional coating apparatuses is that an air boundary layer
may be entrained by both the material web and the backing roll
causing the material web to form a bubble at the point of
application. Id., page 4, lines 5-11. The bubble results in
coating defects or wrinkles, and, thus, impairs the coating
quality. Id., lines 11-13. According to appellant, the
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