
    458 A.2d 286
    Heimbach, Appellants v. C. Porter Manufacturing Co.
    Argued September 8, 1982.
    Samuel A. Litzenberger, for appellants;
    Fredric David Rubin, for appellee.
    Before BROSKY, ROWLEY and MONTGOMERY, JJ.
   The order of the lower court is hereby affirmed.  