Nos. 23486, 24346. Argued December 18, 1970. Decided April 6, 1971. Mr. Bernard M. Mamet, Chicago, Ill., for petitioner in No. 23,486. Mr. Paul G. Gebhard, Chicago, Ill., with whom Mr. Arthur B. Smith, Jr., Chicago, Ill., was on the brief, for petitioner in No. 24,346 and intervenor in No. 23,486. Mr. Frank Itkin, Atty., National Labor Relations Board, of the bar of the Supreme Court of New Jersey, pro hac vice, by special leave of court, for respondent. Messrs. Arnold Ordman, General Counsel, Dominick