Method and apparatus for curving a glass sheet

A method of curving a glass sheet which has been heated to bending temperature, comprising blowing a hot gas stream with a large cross-sectional area against said sheet to press said sheet against a curved forming surface of a curving form,

• increasing the static pressure component of the gas current at at least one region adjacent a portion of the periphery of said form where said surface is sharply curved, by means of a barrier disposed on said portion of the periphery, and
• reducing the static pressure between the glass sheet and said forming surface in said region by providing a passageway through said form from said region to a space on the opposite side of said form, in which space the static pressure is reduced.

An apparatus for curving a glass sheet which has been heated to bending temperature, comprising a curving form having a forming surface against which said glass sheet is applied, and at least one pressure baffle adjacent to, but spaced from, said curving form,

• said baffle being disposed adjacent at least one region of the periphery of said curving surface which sharply curved and being oriented approximately perpendicularly to the terminal tangents of said forming surface of the curving form.

An apparatus for curving a glass sheet which has been heated to its bending temperature, comprising a curving form bearing a curved forming surface,

• the periphery of said curved forming surface bearing, in at least one region where said surface is steeply curved, at least one pressure baffle disposed on said periphery, oriented approximately perpendicularly to the terminal tangents of the forming surface of the curving form, said curving form bearing holes therethrough in the region adjacent said pressure baffle.