| 摘要 |
<p>An apparatus for heating glass sheets for tempering. The apparatus comprises: a heating furnace (1) having a longitudinal direction and a lateral direction, a conveyor (2) in the furnace for carrying glass sheets (G) in the longitudinal furnace direction, and means (3-8) for circulating and heating convection air. These means include nozzle enclosures (6) provided with jet orifices (9) for blasting heated convection air towards the conveyor. The nozzle enclosures (6) lengthwise of the furnace are disposed at an acute angle relative to the glass traveling direction. The angle is at least 2 degrees, preferably 2-10 degrees, most preferably about 3-5 degrees.</p> |
