No. 16119. Argued May 2, 1967. Decided August 1, 1967. James J. Leyden, Philadelphia, Pa. (Herbert G. Keene, Jr., Schnader, Harrison, Segal Lewis, Philadelphia, Pa., on the brief), for petitioner. Warren M. Davison, Atty., N.L.R.B., Washington, D.C. (Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Linda R. Sher, Atty., N.L.R.B., on the brief), for respondent. Before McLAUGHLIN, HASTIE and SEITZ, Circuit Judges. OPINION OF THE COURT