Electrically heated covering

Claim 1

AN ELECTRICALLY HEATED COVERING IN THE FORM OF A SUBSTANTIALLY RECTANGULAR FLAT ASSEMBLY WHICH IS ADAPTED TO WRAP AND COMPLETELY ENCLOSE ARTICLES AND MATERIALS AT ELEVATED TEMPERATURES TO AID THE CURING AND HARDENING OF MATERIALS SUCH AS CONCRETE AND TO AID THE PRESERVING, STORAGE AND SEASONING OF MATERIALS SUCH AS TIMEBER OR OTHER ARTICLES HARMED AT LOW TEMPERATURES, SAID COVERING ASSEMBLY COMPRISING TOP AND BOTTOM WATER-IMPERVIOUS SYNTHETIC PLASTIC SHEETS WHICH ARE JOINED TOGETHER AT THEIR MARGINAL EDGES TO FORM A WATERPROOF ENVELOPE, SAID OUTHER TOP AND BOTTOM PLASTIC SHEETS EACH BEING LAMINATED AND BEING REINFORCED ON THE INSIDE BY A LAYER OF WOVEN TEXTILE FABRIC BONDED THERETO, A FILLING OF MINERAL FIBROUS INSULATION WHICH IS DISPOSED AS A LAYER BETWEEN SAID TOP AND BOTTOM WATER-IMPERVIOUS LAMINATED PLASTIC SHEETS TO CONSTITUTE AN INSULATION BATTING WITHIN SAID ASSEMBLY, HEATING ELEMENTS IN THE FORM OF INSULATED ELECTRICAL WIRING, SAID WIRING BEING SECURED WITHIN THE INTERIOR OF THE ASSEMBLY TO DISBRIBUTE HEAT WITHIN THE ASSEMBLY, THE SIDE EDGES OF SAID RECTANGULAR ASSEMBLY BEING PROVIDED WITH PROJECTING FLAPS WHICH ARE OF GENERALLY RECTANGULAR SHAPE AND HAVE A WIDTH LESS THAN THE WIDTH OF THE ASSEMBLY, AN ELECTRICAL INLET CONNECTOR ADAPTED TO BE FITTED INTO A SOURCE OF ELECTRICAL CURRENT SUPLY AND SAID TOP AND BOTTOM SHEETS BEING PROVIDED WITH A ROW OF EYELETS LOCATED AT THE OUTER EDGE OF ONE SIDE AND WITH A CORRESPONDING ROW OF EYELETS LOCATED ALONG AN INNER LINE PARALLEL TO THE OPPOSITE EDGE, WHEREBY THE SIDE FLAPS CAN BE TURNED IN AND THE ASSEMBLY CAN BE WRAPPED AROUND AN ARTICLE TO PLACE THE EYELETS OF ONE EDGE IN ALIGNMENT WITH THE CORRESPONDING EYELETS ADJACENT THE OTHER EDGE TO ADAPT THE ASSEMBLY FOR LACING.