No. 14436. Argued November 8, 1963. Decided April 30, 1964. Robert D. Corbin, Newark, N.J. (Joseph P. Dunn, Newark, N.J., on the brief), for petitioner. Melvin J. Welles, N.L.R.B., Washington, D.C. (Arnold Ordman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Asst. General Counsel, Janet Kohn, Attorney, N.L.R.B., on the brief), for respondent. Louis Sherman, Laurence J. Cohen, Washington, D.C. (Sherman, Dunn Sickles, Washington, D.C., on the brief), for Building