Refrigerator door construction

Claim 1

A REFRIGERATOR DOOR CONSTRUCTION ADAPTED TO MOVE WITHIN A FREEZER CABINET COMPRISING A TRANSPARENT SHEET, SAID TRANSPARENT SHEET BEING HELD IN PLACE BY A FRAME COMPRISING AT LEAST THREE SECTIONS, A FIRST METALLIC SECTION ADAPTED TO THE OUTER SURFACE OF SAID FRAME AND EXPOSED TO THE NON-REFRIGERATED ATMOSPHERE, A SECOND NON-HEAT CONDUCTIVE PLASTIC SECTION GENERALLY INWARDLY SPACED FROM SAID METALLIC OUTER SURFACE AND BEING SLIDEABLY CONNECTED TO SAID FIRST SECTION BY EMBRACEABLY FITTING LONGITUDINAL GROOVES IN SAID FIRST AND SECOND SECTIONS, A THIRD NON-HEAT CONDUCTIVE PLASTIC SECTION ADAPTED TO BE THE INNER SURFACE OF SAID FRAME, SAID THIRD SECTION BEING SLIDEABLY CONNECTED TO SAID SECOND SECTION BY EMBRACEABLY FITTING LINGITUDINAL GROOVES IN SAID SECOND AND THIRD SECTIONS, SAID TRANSPARENT SHEET BEING INTERPOSED BETWEEN SAID FIRST AND THIRD FRAME SECTIONS, SUPPORTING PLANAR SURFACES IN SAID FIRST METALLIC AND THIRD PLASTIC SECTIONS EMBRACING THE SURFACES OF SAID TRANSPARENT SHEET, SAID SECOND NON-HEAT CONDUCTIVE PLASTIC SECTION HAVING A LONGITUDINAL GROOVE ALONG ITS BOTTOM SURFACE ADAPTED TO RECEIVE A DOOR CABINET TRACK, SAID REFRIGERATOR DOOR BEING MOUNTED ON SAID DOOR CABINET TRACK BY MEANS OF SAID GROOVE AND BEING ADAPTED TO SLIDING MOVEMENT ALONG SAID TRACK.