Insulation panels for use in box cars

Claim 1

IN A CLOSED BOX CAR ARRANGEMENT PROVIDED WITH ATTACHMENT MEANS ON THE INTERIOR SURFACE OF ONE CAR WALL AND AN INSULATION PANEL UNIT HAVING A MOUNTING SURFACE AT WHICH THE PANEL UNIT IS MOUNTED TO THE INTERIOR SURFACE OF THE CAR WALL AT THE ATTACHMENT MEANS: THE IMPROVEMENT OF AN INSULATION, PANEL UNIT COMPRISING; A BASE PANEL, A PLURALITY OF STRIP MEMBERS SPACED FROM SAID BASE PANEL WITH THE REMOTE SURFACE OF EACH STRIP MEMBER LYING IN A COMMON PLANE, SAID STRIP MEMBERS BEING ARRANGED RELATIVE TO SAID BASE PANEL TO OVERLIE THE ATTACHMENT MEANS TO THE BOX CAR, AND CELLULAR PLASTIC INSULATING MATERIAL IN CONTINUOUS EXTENSION BETWEEN SAID BASE PANEL AND SAID COMMON PLANE AND BONDED TO THE CONTACTED SURFACES OF SAID BASE PANEL AND STRIP MEMBERS, THE SURFACE OF EACH OF SAID STRIP MEMBERS AND OF SAID CELLULAR PLASTIC MATERIAL IN SAID COMMON PLANE DEFINING THE MOUNTING SURFACE OF THE INSULATION PANEL UNIT, WHEREBY UPON MOUNTING OF SAID INSULATION PANEL UNIT AT SAID STRIP MEMBERS TO THE ATTACHMENT MEANS OF THE BOX CAR SAID MOUNTING SURFACE IS DRAWN AGAINST THE INTERIOR SURFACE OF THE CAR WALL AND THE CELLULAR PLASTIC INSULATING MATERIAL SURFACE PORTION THEREOF CONFORMS TO THE CONTOUR OF THE INTERIOR SURFACE.