Patent ID: 8253080

Claim:
Heating apparatus comprising a stratified and flattened body, said body comprising, symmetrically from the center outwards: two first layers of laminar electricity conducting elements adhesively coupled together by interposing one center layer of first laminar insulating material; two second layers of second laminar insulating material covering said two first layers; and at least one third layer of laminar insulating material covering said second layers, wherein said second layers comprise sheets of removable adhesive material that can be removed by manually pulling them from said first layers, said sheets of removable adhesive material being polyethylene, wherein said center layer comprises: a laminar supporting core in insulating material, wherein the insulating material is a sheet of polyester; two first elements for coating said laminar core, said two first elements being two respective sheets of nonwoven fabric; and two second elements for insulating covering said first elements so to insulate said center layer from said first layers.