Patent Appeal No. 7731. February 9, 1967. Herbert B. Keil, Richard L. Johnston, Chicago, Ill., for appellants. Joseph Schimmel, Washington, D.C., for the Commissioner of Patents. Before WORLEY, Chief Judge, and RICH, SMITH, and ALMOND, Judges, and Judge WILLIAM H. KIRKPATRICK. Senior District Judge, Eastern district of Pennsylvania, sitting by designation. ALMOND, Judge. This is an appeal from the decision of the Patent Office Board of Appeals affirming the rejection of claims 13 and 14 of application