Dennis (evetta, Thomas), Williams (patricia), Smith(darlene), Cast (ruth Ann), Vick (estella) v. Pertec Computer Corp., F/k/a Pertec Corp., Successor Tocomputer Machinery Corp., Scan Optics, Inc., Unisys Corp.,as Successor in Interest to Sperry Rand Corp.; Faulkner(carol, Gerald) v. Pertec Computer Corp., F/k/a Perteccorp., Successor to Computer Machinery Corp., Unisys Corp.,as Successor in Interest to Sperry Rand Corp., John Doe 1through John Doe 50 ;, 980 F.2d 722 (3d Cir. 1992)