Bending glass sheets

Details Bending glass sheets Bending glass sheets

1994-02-25

1995-08-01

Jones, W. Gary

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65273, 65290, 65291, C03B 23023, C03B 2303

Patent

active

054377030

ABSTRACT:
A method is provided in which a glass sheet is bent on a mould having a movable end, comprising the steps of: heating the glass sheet to its bending temperature; subjecting the glass sheet to an initial gravity bending step; providing support to a portion of the glass sheet located on the movable end of the mould; while providing said support, lowering said movable end away from the glass sheet; subjecting the glass sheet to a press bending step; cooling the bent glass sheet. Support may be provided by a reduced pressure within an upper mould, a mechanical arm, or gas directed in a generally upwards direction. The invention may be used for bending glass for architectural or automotive purposes, e.g. for bending a pair of glass sheets, one on top of the other, for use in the manufacture of a laminated windscreen, to achieve deep and/or complex bent shapes.

REFERENCES:
patent: 4229200 (1980-10-01), Seymour
patent: 4501603 (1985-02-01), Frank et al.
patent: 4514208 (1985-04-01), Nitschke
patent: 4720296 (1988-01-01), Bartusel et al.
patent: 4865638 (1989-09-01), Kudo
patent: 4892574 (1990-01-01), Cortes
patent: 5049178 (1991-09-01), Pereman et al.
patent: 5302176 (1994-04-01), Shibuya et al.

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