No. 7656. Argued June 11, 1958. Decided July 12, 1958. Rosanna A. Blake, Attorney, National Labor Relations Board, Washington, D.C. (Jerome D. Fenton, General Counsel, Thomas J. McDermott, Associate General Counsel, Marcel Mallet-Prevost, Asst. General Counsel, and Frederick U. Reel, Attorney, National Labor Relations Board, Washington, D.C., on brief), for petitioner. E.C. Brooks, Jr., Durham, N.C. (Eugene C. Brooks, III, Durham, N.C., on brief), for respondents. Before SOBELOFF, Chief Judge, and