Refrigerated display unit

Claim 1

AN UPRIGHT REFRIGERATED DISPLAY UNIT COMPRISING A PLURALITY OF SECTIONS, EACH OF SAID SECTIONS COMPRISING A PLURALITY OF VERTICALLY SPACED SHELVES, EACH HAVING UNINTERRUPTED UPPER AND LOWER SURFACES, MEANS FOR REMOVABLY SUPPORTING SAID SHELVES ABOVE ONE ANOTHER AND ENABLING EACH SHELF TO BE VERTICALLY ADJUSTED, MEANS FORMING A PLURALITY OF VERTICALLY DISPOSED DUCTS BEHIND SAID SHELVES AND FORMING REAR WALLS FOR THE SPACES BETWEEN SAID SHELVES, MEANS FORMING AN ORIFICE FOR EACH OF SAID DUCTS TO CONTROL FLOW THERETHROUGH, MEANS FORMING AN OUTLET IN THE REAR WALL BETWEEN EACH ADJACENT PAIR OF SHELVES, EACH OUTLET BEING CLOSER TO THE UPPER ONE OF THE PAIR OF SHELVES, ALL BUT ONE OF SAID VERTICAL DUCTS TERMINATING AT SEPARATE OUTLETS, EACH OF SAID OUTLETS INCLUDING. A PLURALITY OF VANES DIRECTED SLIGHTLY DOWNWARDLY AND POSITIONED TO INTERCEPT APPROXIMATELY EQUAL AMOUNTS OF AIR FLOWING THROUGH THE ASSOCIATED DUCT, MEANS FORMING AN ADDITIONAL OUTLET ABOVE THE FRONT EDGES OF SAID SHELVES AND CONNECTED TO THE REMAINING DUCT TO DIRECT A CURTAIN OF COLD AIR DOWNWARDLY IN FRONT OF SAID SHELVES, MEANS FORMING AN INLET AT THE FRONT EDGE OF THE LOWER SHELF, A PASSAGE CONNECTING SAID INLET WITH SAID VERTICAL DUCTS, FAN MEANS AND COOLING MEANS IN SAID PASAGE TO MOVE THE AIR FROM SAID INLET TOWARD SAID VERTICAL DUCTS AND TO COOL THE AIR, DRAIN MEANS COMMUNICATING WITH SAID PASSAGE TO DRAIN WATER RESULTING FROM MELTED FROST ACCUMULATED ON SAID COOLING MEANS, A HEATING DEVICE NEAR SAID DRAIN MEANS TO PREVENT THE WATER FROM FREEZING, MEANS FORMING AN UPRIGHT PASSAGE OUTSIDE SAID INLET, HEATING MEANS IN SAID UPRIGHT PASSAGE TO ESTABLISH AN UPWARDLY MOVING CURTAIN OF WARM AIR OUTSIDE THE CURTAIN OF COLD AIR, A HEATING ELEMENT AT THE LOWER SURFACE OF EACH OF SAID SHELVES BELOW WHICH THERE IS A COLD AIR OUTLET, A PRICE TAG MOLDING AT THE FRONT EDGES OF AT LEAST SOME OF SAID SHELVES AN ADDITIONAL HEATING ELEMENT BEHIND EACH OF SAID PRICE TAG MOLDINGS, FLEXIBLE MEANS TO CONNECT SAID HEATING ELEMENTS TO AN ELECTRICAL SUPPLY OUTLET IN EACH OF SAID SECTIONS FOR EACH OF SAID SHELVES HAVING A HEATING WIRE TO SUPPLY CURRENT THROUGH THE HEATING ELEMENTS, WHEREBY EACH OF SAID SHELVES CAN BE ADJUSTED VERTICALLY WITHOUT INTERRUPTING THE ELECTRICAL CONNECTIONS AND CAN BE REMOVED FROM THE SECTION, A ROLLER ROTATABLY SUPPORTED IN FRONT OF AND ABOVE SAID SHELVES, AND A CURTAIN FINER THAN 100 MESH MOUNTED ON SAID ROLLER FOR RETRACTION THEREON AND FOR MOVEMENT DOWNWARDLY IN FRONT OF SAID SHELVES AND BETWEEN THE COLD AND WARM AIR CURTAINS.