F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
F27B 9/24 (2006.01) C03B 29/08 (2006.01)
Patent
CA 2373332
The invention relates to a method and an apparatus for heating glass panels in a tempering furnace equipped with rollers. Glass panels (7) are carried on a conveyor established by rollers (6) into a tempering furnace (1) for the duration of a heating cycle, followed by carrying the glass panels (7) into a tempering station (21), and the glass panels (7) are heated in the tempering furnace (1) by means of bottom- and top-heating radiation elements (2, 3), as well as by bottom- and top-heating convection elements (4, 4a, 4b, 4c, 4, 4a', 4b', 4c', 5) whereby convection air is supplied into the tempering furnace (1). The glass panels' (7) bottom side is heated by means of the bottom-heating convection elements (4, 4a, 4b, 4c, 4', 4a', 4b', 4c'), which are lengthwise of the furnace (1) and define convection heating zones (A, B, C, D, E, F, G, H, I and J) side by side in a lateral direction of the tempering furnace (1). Thus, the convection heating effects of the convection heating zones (A, B, C, D, E, F, G, H, I and J) can be altered relative to each other for profiling the heat transfer coefficient in a lateral direction of the furnace.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Tamglass Ltd. Oy
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