| 摘要 |
The present invention relates to a process for manufacturing flat sheets of a glass-based material and to a device associated with the process. The process comprises delivering the glass-based material (10) from a delivery system (16) to a reservoir (24) between two porous walls (12), the reservoir having a vertical length (L), a horizontal width (W) between side edges (22, 22' of the walls and including a gap (14) between the walls which varies along the vertical length of the reservoir, the material being separated from the walls by a gas film (28), drawing the glass-based material in a sheet from an outlet of the reservoir, and wherein a flow of the glass-based material delivered to the reservoir is varied across the width of the reservoir, or wherein the gap (14) varies across the horizontal width (w) of the reservoir (24)
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