No. 75-1907. Argued April 14, 1976. Decided June 25, 1976. James A. Burstein, Chicago, Ill., for petitioner. Elliott Moore, Deputy Assoc. Gen. Counsel, Robert G. Sewell, Anne E. Libbin, N.L. R.B., Washington, D.C., for respondent. Petition for review from the National Labor Relations Board. Before HASTINGS, Senior Circuit Judge, TONE, Circuit Judge, and NOLAND, District Judge. The Honorable James E. Noland, United States District Judge for the Southern District of Indiana, is sitting by designation