Means for reducing frost build-up

Claim 1

IN A CONSTRUCTION OF THE TYPE DEFINING AN OPEN SIDE AND INCLUDING AIR INLET MEANS AND A PLURALITY OF AIR NOZZLES EXTENDING IN SIDE-BY-SIDE RELATIONSHIP ACROSS OPPOSITE EDGES OF SAID OPEN SIDE, PASSAGES DEFINED IN SAID CONSTRUCTION COMMUNICATING EACH OF THE CORRESPONDING INLETS AND NOZZLES, AND CIRCULATING MEANS LOCATED IN AT LEAST ONE OF THE INNER ONES OF SAID PASSAGES FOR DRIVING AIR STREAMS THROUGH SAID PASSAGE AND ACROSS SAID OPEN SIDE BETWEEN CORRESPONDING INLETS AND NOZZLES, SAID AIR STREAMS CROSSING SAID OPEN SIDE IN SIDE-BY-SIDE CONTACTING RELATIONSHIP, THE IMPROVEMENT COMPRISING HEAT CONDUCTIVE MEANS EXTENDING ACROSS SAID PASSAGES WHEREBY SAID HEAT CONDUCTIVE MEANS ARE CONTACTED BY THE AIR STREAMS CIRCULATING IN SAID PASSAGES, SAID HEAT CONDUCTIVE MEANS COMPRISING MEMBERS HAVING A PLURALITY OF EXTENDING PORTIONS AND A COMMON INTERMEDIATE BASE, SAID EXTENDING PORTIONS EXTENDING OUTWARDLY FROM SAID BASE AT LEAST PART WAY INTO EACH OF SAID ADJACENT PASSAGES, ONE EXTENDING PORTION OF SAID HEAT CONDUCTIVE MEANS BEING LOCATED FOR CONTACT WITH THE AIR CIRCULATING IN AN OUTER PASSAGE, AND A FURTHER EXTENDING PORTION OF SAID HEAT CONDUCTIVE MEANS BEING LOCATED FOR CONTACT WITH AIR CIRCULATING IN AN ADJACENT INNER PASSAGE WHEREBY HEAT FROM THE WARMER AIR STREAM WILL BE CONDUCTED BY SAID HEAT CONDUCTIVE MEANS TO THE PORTION OF SAID HEAT CONDUCTIVE MEANS CONTACTING SAID COLDER AIR STREAM.