O'CONNELL, Judge.
This is an appeal from a decision of the Board of Appeals of the United States Patent Office affirming the decision of the Primary Examiner rejecting claims numbered 7, 9, 10, 13, 16, and 19-24 in appellants' application for a patent for an improvement in a core blowing machine and for the cartridge used in the machine. Claims 15 and 18 for the cartridge were allowed by the Board of Appeals.
The following references were relied upon:
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