No. 16588. Argued January 22, 1962. Decided June 7, 1962. Petition for Rehearing Denied October 12, 1962. Mr. David Previant, Milwaukee, Wis., with whom Messrs. Hugh Hafer, Seattle, Wash., and David Leo Uelmen, Milwaukee, Wis., were on the brief, for petitioners. Mr. Melvin J. Welles, Atty., N.L.R.B., of the bar of the Court of Appeals of New York, pro hac vice, by special leave of court, with whom Messrs. Stuart Rothman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, and Marcel Mallet-Prevost