SHEET GLASS SAG-BENDING MOULD Russian patent published in 2010 - IPC C03B23/02 

FIELD: chemistry.

SUBSTANCE: invention relates to production of curved glass. The sheet glass sag-bending mould is made from two articulated surfaces, each designed using the formula: (Y±A)²+Z²=4FX, where, F is focal distance; A is distance between articulation lines and lines parallel to the said articulation lines and pass through the foci of the surfaces; x, y and z are coordinates; the value A varies from 3 to 4.

EFFECT: increase in angle of dispersion of signalling lights by more than 17°.

2 dwg