Nos. 8972, 9000. Argued September 26, 1963. Decided December 27, 1963. J.W. Alexander, Jr., Charlotte, N.C. (Blakeney, Alexander Machen, Charlotte, N.C., on brief), for petitioner Overnite Transp. Co. Robert J. Sanders (Sanders Walker, Charlotte, N.C., on brief), for petitioners, Jack Eudy and others. Warren M. Davison, Atty., N.L.R.B. (Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Assoc. Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, and Lee M. Modjeska, Atty., N.L.R.B., on brief),