Method for the production of curved glass sheets
AssigneeSaint-Gobain Vitrage International
InventorsBernard Letemps, Jacques Leclercq
Life of this patent
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Abstract
A method of and a device for curving glass sheets preheated to curving temperature operate by passage of the glass sheets simultaneously over a principal shaping bed having a longitudinal trajectory which is substantially circular or substantially a cone of revolution, and one or more secondary shaping beds, the generatrices of which are inclined relative to those of the principal bed. The invention is applicable, notably, to the production of automobile panes having angled corners.
Claims8
Method of curving glass sheets preheated to curving temperature, comprising the steps of:
- a first step of passing the glass sheets over a curved principal shaping bed located outside of a furnace and having a substantially circular longitudinal trajectory so as to produce a principal curvature;
- and
- simultaneously with said first step, a second step of producing a secondary curvature by passing the glass sheets between, and in contact with, two series of revolving elements forming at least one secondary shaping bed, the generatrix of which is inclined relative to that of the principal bed and intersects said principal bed.
Method of curving glass sheets preheated to curving temperature, comprising the steps of:
- a first step of passing the glass sheets over a curved principal shaping bed having a substantially conical longitudinal trajectory so as to produce a principal curvature;
- and
- simultaneously with said first step, a second step of producing a secondary curvature by passing the glass sheets over at least one secondary shaping bed, the generatrix of which is inclined relative to that of the principal bed and intersects said principal bed.
Dependencies are inferred from the claim text.