Refrigerated display case and elements thereof

Claim 1

A NOZZLE ASSEMBLY FOR USE IN MAINTAINING NONENTRAINING PARALLEL PANELS OF DIFFERENTLY CONDITIONED AIR ACROSS THE OPEN SIDE OF AN OTHERWISE ENCLOSED SPACE WHICH COMPRISES AT LEAST TWO NOZZLES ARRANGED IN SIDE-BY-SIDE RELATION SHIP TO EXTEND CONTINUOUSLY ALOGN THE LENGTH OF ONE EDGE OF THE OPEN SIDE AND POSITIONED TO DIRECT THE AIR PANELS TOWARDS THE OPPOSITED EDGE THEREOF, ONE OF SAID NOZZLES BEING AN INNER CONDITIONED AIR DIRECTING NOZZLE HAVING AN INNER EDGE PORTION POSITIONED ADJACENT THE OPEN SIDE OF THE ENCLOSED SPACE, THE OTHER NOZZLE BEING AN OUTER DIFFERENTLY CONDITIONED AIR NOZZLE HAVING AN OUTER EDGE POSITIONED TOWARDS THE AMBIENT ATMOSPHERE, SAID NOZZLES EMBODYING MEANS FOR ISSUING THE AIR STREAMS AT LOWER VELOCITY FROM THE INNER PORTION OF THE INNER NOZZLE AND FROM THE OUTER PORTION OF THE OUTER NOZZLE THAN THE AIR STREAMS ISSUIGN FROM OTHER PORTIOSN OF THE INNER AND OUTER NOZZLES, SAID MEANS COMPRISING A PLURALITY OF VANES EXTENDING LENGTHWISE ACROSS EACH OF THE NOZZLES DIVIDING THE NOZZLES INTO VANED SECTIONS, AND ADDITIONAL VANED SECTIONS IN COMMUNICATION WITH THE VANED SECTIONS IN THE INNER PORTIONS OF THE INNER NOZZLE AND THE OUTER PORTIONS OF THE OUTER NOZZLE TO IMPART RESISTANCE TO GASEOUS FLOW WHEREBY THE VOLUME OF AIR PASSIGN THROUGH SAID VANED SECTIONS HAVING BARRIERS IS LESS THAN THROUGHT THE REMAINDER OF THE VANED SECTIONS WITH CORRESPONDING DECREASE IN VELOCITY OF AIR ISSUING FROM THE CORRESPONDING INNER PORTIONS OF THE INNER NOZZLE AND OUTER PORTIONS OF THE OUTER NOZZLE.