No. 23129. October 25, 1967. Rehearing Denied February 6, 1968. Theo F. Weiss, San Antonio, Tex., Seymour Swerdlow, New York City, for petitioner, United States Rubber Co., Clemens, Knight, Weiss Spencer, San Antonio, Tex., Arthur, Dry, Kalish, Taylor Wood, New York City, of counsel. Marcel Mallet-Prevost, Asst. Gen. Counsel, N.L.R.B., Glen M. Bendixsen, Atty., N.L.R.B., Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel., Warren M. Laddon, Atty., N.L.R.B., Washington, D.C.,