| 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 passing a stream of the material (10) through a reservoir (24) comprising a hollow central portion defined and delimited by the porous walls (12) of the reservoir, in which the material accumulates and through which it flows, in an almost steady state and with a limited residence time, any contact between the material and the walls being prevented, the hollow central part of the reservoir having a substantially rectangular, horizontal cross-section whose width decreases continuously from a maximum width D to a minimum width D', in the direction of flow of the material, over at least a portion of the flow path of the material. The drawn glass has a viscosity less than about 10 7 poise at an outlet of the reservoir (24). |
