No. 84-2505. Argued June 4, 1985. Decided September 25, 1985. John Walsh, Associate Gen. Counsel, N.L.R.B., Washington, D.C., for petitioner. Clyde E. Craig, Wiley, Craig, Armbruster Wilburn, St. Louis, Mo., for respondent. Before CUMMINGS, Chief Judge, ESCHBACH, Circuit Judge, and WRIGHT, Senior Circuit Judge. The Honorable Eugene A. Wright, Senior Circuit Judge of the United States Court of Appeals for the Ninth Circuit, is sitting by designation. EUGENE A. WRIGHT, Senior Circuit Judge. FACTS Helmkamp