No. 14737. Argued May 22, 1964. Decided June 4, 1964. Joseph C. Thackery, N.L.R.B., Washington, D.C. (Arnold Ordman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Assistant General Counsel, Melvin J. Welles, Attorneys, National Labor Relations Board, on the brief), for petitioner. Martin J. Vigderman, Philadelphia, Pa. (Abraham E. Freedman, Freedman, Landy Lorry, Philadelphia, Pa., on the brief), for respondents. Before KALODNER, GANEY and SMITH, Circuit Judges