C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
117/64, 204/91.3
C03C 17/42 (2006.01) C03C 19/00 (2006.01)
Patent
CA 1199888
- 14 - ABSTRACT OF THE DISCLOSURE The disclosed method is one for applying an opaque screening area (46) to a surface of a glass sheet (40). The method is initiated by applying to the surface of the glass sheet a masking material (42) which defines the edges of the opaque screening area. The masking material is nonreactive with the glass surface and is heat decomposable into products which can be removed from the glass surface without damage thereto. The masking material extends away from the defined edges of the opaque screening area to provide a wide area of masking material. A ceramic- containing material is applied on areas of the surface of the glass sheet to which the opaque screening areas are to be applied. The ceramic-containing material also coats at least a part of the masking material. The glass sheet is heated to decompose the masking material so that it and any ceramic material overlying it can be removed from the surface of the glass sheet and to heat fuse the fusable components of the ceramic material to the surface of the glass sheet thereby to form the opaque screening area. The decomposed masking material and any ceramic material over- lying it are removed from the glass sheet so that the opaque screening area is defined by a sharp edge which had been defined by the masking material before its removal.
417349
Ford Motor Company Of Canada Limited
Sim & Mcburney
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