No. 78-1565. Argued January 22, 1979. Decided March 27, 1979. Linda J. Dreeben, N.L.R.B., Washington, D.C., for petitioner. Leland B. Cross, Jr., Indianapolis, Ind., for respondent. Petition for review from the National Labor Relations Board. Before PELL, Circuit Judge, MARKEY, Chief Judge, and WOOD, Circuit Judge. The Honorable Howard T. Markey, Chief Judge of the United States Court of Customs and Patent Appeals, is sitting by designation. MARKEY, Chief Judge. The National Labor Relations Board