Vorrichtung zur Herstellung von Metalloxyd-UEberzugstreifen auf gebogenen Glasscheiben

摘要

As shown, an apparatus for forming a band of metal oxide film having a curved cut-off line on an elongated glass sheet comprises a horizontally extending tunnel-like, heating furnace 124, a skeleton mould 100 for supporting a flat glass sheet G in a substantially horizontal plane, a spraying station 130 located beyond said furnace 124, a conveyer 108 extending in a horizontal plane through said furnace 124 and said spraying station 130 for conveying said skeleton mould 100 therethrough, said spraying station 130 comprising a spray gun 132 located above said conveyer 108 and disposed to spray metal oxide film-forming composition at an acute angle toward said conveyer 108, cam means 162 having a curved surface 166 extending transversely to said conveyer 108 and spaced therefrom, said spray gun 132 being mounted to move transversely to said conveyer 108 while guided by said cam means 162 along a curved path spaced from said horizontal path of said conveyer 108 and means for supplying metal oxide film-forming composition to said spray gun 132 while the latter moves transversely to the conveyer 108. The conveyer is formed by stub-rolls. A glassbending lehr 190 and a tempering station 200 may be located beyond said spraying station 130 (Fig. 4). Glass laden moulds 100 heated in a furnace 124 pass into spraying station 130 where the glass sheet is sprayed from gun 132 which follows an arcuate path as a result of the cam means. Then the moulds 100 pass into a bending furnace 190 and then a tempering station 200. The periods of time the moulds 100 are in the various stations are determined by electrical circuits actuated by elements responsive to the surface temperatures of the glass sheets. When the treatment in a certain station is complete a circuit is set up which sets off the necessary steps for the continued passage of the moulds 100 through the apparatus. The metal oxide coatings may contain tin, indium, cadmium, antimony, bismuth, iron, zinc, copper, vanadium, chromium, manganese, cobalt and nickel oxides.