Abstract: The composite sound insulation system for room boundary surfaces includes a sound-proofing layer (D) in communication with the corresponding floor, wall, or ceiling covering (V) which preferably has an inner loss factor &eegr;int of at least 0.1, and more particularly of at least 0.2, and a footfall sound-proofing layer (S) adjoining the floor, wall, or ceiling covering (V) or the sound-proofing layer (D) on the side facing away from the room and having a dynamic stiffness (s′) of at most 20 MN/imn3, preferably of at most 10 MN/m3. The floor, wall, or ceiling covering (V) preferably is a paneling having a thickness of at most 40 mm, preferably of at most 20 mm, and more particularly at most 10 mm, which can be made of two parts, in which case (V1, V2)for instance, at least one sound-proofing layer (D) is arranged between the two parts (V1, V2).

Abstract: The present invention relates to a heating member with a resistive surface (1) that comprises at least one resistive layer (10), two conductive layers (20, 30) as well as isolation layers (40, 50) respectively arranged between said layers (10, 20, 30). The first conductive layer (30) is made in the form of a neutral conductor, while the second conductive layer (30) is made in the form of a protection conductor. In a preferred embodiment of this invention, the resistive layer (10) comprises respectively a contact electrode (11, 12) on both sides in the edge area, while the first and second conductive layers (20, 30) each include a contact electrode (21, 31) in the edge area. The contact electrodes (11, 12, 21, 31) protrude longitudinally and on at least one side above their respective layers (10, 20, 30). A contact electrode (12) of the first resistive layer (10) coincides with the contact electrode (31) of the first conductive layer (30).

Abstract: A resistor heating element (1) has a resistive sheet layer (2) which contains a resistive material (preferably an electroconductive polymer) and is placed between at least two electroconductive layers (3, 4, 7) shaped as plane electrodes in order to form a sandwich element. Each layer (3, 4, 7) can be connected to a power supply line via contact studs. At least one recess (5) in the first electroconductive layer (3) is shifted relatively to a recess (6) in the second electroconductive layer (4) so that the two recesses (5, 6) (viewed in projection one on top of the other) are placed at a distance from each other. These recesses (5, 6) are located in the border region of the electroconductive layer (3, 4, 7) and at least one contact stud (34) can come into electrical contact and be mechanically connected to the other electroconductive layer (3) in the region of the recess (5) of a first electroconductive layer (4) via the resistive layer (2).

Abstract: The composite sound insulation system for room boundary surfaces consists of a sound-proofing layer (D) in communication with the corresponding floor, wall, or ceiling covering (V) which preferably has an inner loss factor &eegr;int of at least 0.1, and more particularly of at least 0.2, and of a footfall sound-proofing layer (S) adjoining the floor, wall, or ceiling covering (V) or the sound-proofing layer (D) on the side facing away from the room and having a dynamic stiffness s′ of at most 20 MN/m3, preferably of at most 10 MN/m3. The floor, wall, or ceiling covering (V) preferably is a paneling having a thickness of at most 40 mm, preferably of at most 20 mm, and more particularly at most 10 mm, and it can be made of two parts, in which case for instance at least one sound-proofing layer (D) is arranged between the two parts (V1, V2).