| 摘要 |
<p>A method and quench unit (10, 10a, 10b) disclosed provide tempering of a heated glass sheet by impinging pressurized gas against its opposite surfaces while within a chamber (18) at super-atmospheric pressure. An enclosure (16) of the quench unit defines the chamber (18) and is preferably pressurized by the spent quenching gas which is delivered through opposed blastheads (12). The spent quenching gas is removed from the chamber (18) to maintain the gas pressure below a predetermined level. A gas supply system (24) disclosed cools and pressurizes the spent quenching gas received from the chamber (18) and then feeds this gas back to the blastheads (12) in a recirculating fashion for impingement with the glass sheet in the chamber.</p> |
