No. 16032. Argued January 19, 1967. Decided April 25, 1967. Solomon Hirsh, National Labor Relations Board, Washington, D.C. (Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Assoc. Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Peter M. Giesey, Atty., National Labor Relations Board, on the brief), for petitioner. Ernest Prupis, Elizabeth, N.J. (Weltchek Weltchek, Elizabeth, N.J., on the brief), for respondent. A.E. Robert Friedman, Brooklyn, N.Y., amicus curiae. Before HASTIE, GANEY and