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US 5,224,978 AGranted
Method for making hot rolled diffusing glazings
AssigneeSaint-Gobain Vitrage International
InventorsPhilippe Hermant, Gerard Chambard, Guillaume Saalburg
Life of this patent
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Abstract
A hot rolled sheet of glass having impressions impressed in the hot glass by a roller having raised projections. The projections are pyramidal or truncated pyramidal with either a square or hexagonal base. The projections produce craters which are separated from one another by a distance smaller than a largest dimension of the craters. In a variant, non-diffusing areas are inserted adjacent to diffusing zones.
Claims11
A process for obtaining a diffusing glazing, comprising the steps of:
- rolling a sheet of glass between a smooth lower roller and an upper roller in a hot rolling technique, wherein the upper roller has a plurality of regularly spaced, identical pyramidal tips having a largest dimension and being separated by a distance which is smaller than the largest dimension;
- and
- forming smooth areas in the sheet of glass which are free of craters formed by said pyramidal tips, said smooth areas being recessed in a surface of the glass and having an approximately planar bottom.
A process for obtaining a diffusing glazing by a hot rolling technique, comprising the steps of:
- rolling a sheet of glass between a smooth lower roller and an upper roller, wherein the upper roller has a plurality of regularly spaced, identical pyramidal tips having a largest dimension and being separated by a distance which is smaller than the largest dimension, wherein the pyramidal tips taper in a first direction, and wherein each of said pyramidal tips includes a pyramidal crater tapering in an opposite direction.
Dependencies are inferred from the claim text.