
    December 10, 1982.
    454 A.2d 148
    Aluminum Co. of Amer. v. Kemper International Insurance. Appeal of Kemper International Insurance Company. Alcoa, etc., et al., v. Kemper Insurance Co. Appeal of: Factory Mutual Insurance Company. Alcoa, et al., v. Kemper Insurance Co., et al. Appeal of: Industrial Risk Insurers.
    
      Argued March 17, 1982.
    Harding A. Orren, for appellants; Robert Walter Doty, for appellees.
    Before SPAETH, JOHNSON and HOFFMAN, JJ.
   Affirmed.  