| 摘要 |
972,453. Laminates and laminating. TRIPLEX SAFETY GLASS CO. Ltd. July 15, 1963 [July 16, 1962], No. 14526/62. Heading B5N. [Also in Division H5] An electrically heated laminated transparent panel comprises wires 23 laid between a sheet 20 of glass and a sheet 22 of vinyl-butyl aldehyde resin and a further sheet 21 of glass, the ends of the wires 23 being joined by conductive strips 24 and the whole assembly being bonded under heat to form a unitary assembly. Alternatively, the wires may be laid between two sheets only of polymethyl methacrylate. In construction the wires 23 are drawn from neck 25 over combs 27, 28 between pads 29 by clamping means 31 which is movable from one side to the other of the glass sheet 20. After being laid on the glass sheet 20 a solvent in the form of a dilute solution of the vinyl-butyl aldehyde resin in chloroform is sprayed over the wires by a spray gun 32. The wires are then cut and further series of wires are laid on the glass sheet as required. The pads 29 are wetted with ammonium sulphide and are pressed together on the wires forming on them a coating of copper sulphide, thereby reducing reflection therefrom. Alternatively oxidation may be caused by passing an electric heating current through the wires. Connection of the strips 24 to the wires 23 may be by a soldering process. The strips 24 are of copper and the wires 23 either cupro-nickel or tungsten. |
