Appeal 2007-4035
Application 10/007,979
Appellants’ claimed invention is directed to a method for forming a
graded coating on a glass ribbon substrate surface. Appellants acknowledge
that forming coated areas or “shade bands” on automotive transparencies is
known to be desirable and has been accomplished via a variety of existing
technologies albeit with varying limitations as to cost, appearance and/or
other technical complexities based on the prior art techniques used
(Specification 1 and 2). Appellants employ a coating dispenser positioned
relative to a substrate end such that an axis extending through a delivery end
thereof subtends an oblique angle with the substrate and moves coating
material through the dispenser to form a graded coating on the substrate.
The thickest portion of the graded coating is formed on the substrate side
closest to the dispenser. Claim 1 is reproduced below:
1. A method for forming a graded coating on a surface of a substrate
having a first end and a second end, comprising the steps of:
displacing a continuous glass ribbon defined as the substrate along a
horizontal path from a glass forming chamber in a downstream direction
relative to the forming chamber;
positioning a coating dispenser defined as a first coating dispenser
relative to the first end of the substrate such that an axis extending through a
delivery end of said coating dispenser subtends a predetermined oblique
angle with the substrate; and
moving coating material defined as a first coating material from said
coating dispenser toward the substrate to deposit the coating material onto
the substrate in one pass to form a graduated coating on a surface of the
substrate,
2
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Last modified: September 9, 2013