Appeal 2006-2908
Application 10/370,840
(a) a base including an aperture sufficiently large for the feed stream
of plastic batch material to pass therethrough;
(b) a plurality of adjustable plates movably mounted to the base, each
adjustable plate being capable of independent movement relative to each
other in an in-and-out direction relative to the aperture; and
(c) a cover for shielding the adjustable plates securely mounted to the
base, wherein by adjusting the adjustable plates in various positions, the
flow velocity gradient of the plastic material provided to the extrusion die is
adjusted such that bow in a honeycomb extrudate can be corrected in any
direction to true “zero” magnitude.
The Examiner relies upon the following references as evidence of
obviousness:
Ziegler US 5,102,602 Apr. 7, 1992
Brew US 6,039,908 Mar. 21, 2000
Grover US 6,663,378 B2 Dec. 16, 2003
Groeblacher US 6,769,899 B2 Aug. 3, 2004
Appellants’ claimed invention is directed to a bow deflector device for
controlling a flow velocity gradient of a feed stream of plastic material that
is fed to an extrusion die. The device comprises a base having an aperture
that is sufficiently large for the plastic feed to pass through. The device also
comprises a plurality of adjustable plates that are capable of independent
movement in an in-and-out direction relative to the aperture, as well as a
cover for shielding the plates. The adjustment of the plates also adjusts the
flow velocity gradient of the plastic material that is provided to the extrusion
die such that bow in a honeycomb extrudate is corrected in any direction to a
true “zero” magnitude.
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