Appeal No. 96-3149
Application 08/305,428
The appellants’ invention is directed to an apparatus for
controlling air flow in an air duct. The subject matter before
us on appeal is illustrated by reference to claim 13, which reads
as follows:
13. In combination,
a fiber duct for receiving a fiber laden pressurized air
stream, said duct having an air permeable wall for exhausting air
therethrough while retaining fiber within said duct;
delivery means at a lower end of said fiber duct for feeding
a fiber wadding from said duct;
a first air duct communicating with said wall to receive the
air exhausted from said fiber duct;
a second air duct communicating with said first air duct to
receive an upward flow of the air therefrom;
a stop in said second air duct;
a throttle valve for throttling the flow of air in said
second air duct, said valve being pivotally mounted on a pivot
axis for pivoting within said second air duct between a lowered
position resting on said stop and a raised position spaced from
said stop; and
at least one of said stop and said valve having means to
allow a minimum air flow therethrough with said valve in said
lowered position.
THE REFERENCES
The references relied upon by the examiner to support the
final rejection are:
Ballard 3,580,644 May 25, 1971
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