COLE, Judge.
Appellant in this case has appealed from a decision of the Board of Appeals of the United States Patent Office, sustaining the rejection by the Primary Examiner of claims 32,, 52, 53 and 54 of appellant's application serial No. 100,823 for patent on a screw extrusion press, on the ground of lack of invention over the prior art.
Claim 32, which is typical of the appealed claims, is as follows:
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