Appeal No. 95-2640
Application No. 07/949,289
This is a decision on appeal from the final rejection of
claims 12 through 23, all of the claims pending in the
application.
The invention pertains to an electrostatic shutter tube.
More particularly, a shutter electrode therein is made to
conform to the electric field produced by a first electrode.
The shutter electrode has a rim positioned in a location where
one of the equipotential lines of the electric field is to be
produced and in a shape which conforms to the predetermined
shape of the line. The shutter electrode also has a minimal
thickness at least at its edge. The shutter electrode shape
and location is said to result in a shutter electrode which
does not substantially disturb the equipotential lines of the
electric field produced by the first electrode.
Independent claim 12 is reproduced as follows:
12. An electrostatic shutter tube for producing a
representation of a photon image, said tube comprising:
a. an electron source for emitting a flow of electrons in
response to an incident photon image;
b. a target on which an image may be inscribed by
incident electrons;
2
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Last modified: November 3, 2007