No. 81-1478. Argued October 27, 1981. Decided February 22, 1982. Rehearing and Rehearing En Banc Denied May 17, 1982. Richard H. Zamboldi (argued), Richard W. Perhacs, Elderkin, Martin, Kelly, Messina Zamboldi, Erie, Pa., for petitioner. David A. Fleischer (argued), William A. Lubbers, Gen. Counsel, John E. Higgins, Jr., Deputy Gen. Counsel, Robert E. Allen, Acting Associate Gen. Counsel, Elliott Moore, Deputy Associate Gen. Counsel, N.L.R.B., Washington, D.C., for respondent. Petition for review