A process for producing an arched pane arrangement for a motor vehicle, using a flexible die, a plastic film being pressed onto the arched glass pane in order to form a film combination and the film combination being subjected to heat treatment at an pressure which is below atmospheric pressure in order to laminate the plastic film onto the pane. The front end of the inner tube has an outer surface formed with a position-limiting groove. The corrosion of the rebar generates iron oxides, which because of their greater volume, cause areas of localized pressure within the concrete. The bottom panel 14 includes air passing means to pass air through from an air assisted patient transfer mattress onto a supporting surface.