No. 79-2360. Argued May 7, 1980. Decided July 18, 1980. Mary Pat Koesterer, Quarles Brady, Milwaukee, Wis., for petitioner. Robert Tendrich, N.L.R.B., Washington, D.C., for respondent. Appeal from the National Labor Relations Board. Before SWYGERT and CUMMINGS, Circuit Judges, and NICHOLS, Associate Judge. The Honorable Philip Nichols, Jr., Associate Judge of the United States Court of Claims, is sitting by designation. SWYGERT, Circuit Judge. The National Labor Relations Board found that Pelton