INSULATED LETTER DROP PLATE

摘要

An insulated drop plate comprised of a back plate having an opening for the mail. Having two hinges at its upper part to attach a cover to. A frame for retaining a first insulation around its perimeter and around the opening. Suitable insulation. This back plate being also provided with an upper curved extension to cover and conceal said hinges. A cover provided with two complementary hinges to be articulated with the first hinges on the back plate. And with a frame around the perimeter for the retention of a second insulation. A wire joining the first and secon d hinges. And a coil spring on the wire to keep the cover normally closed.