C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/47
C03B 27/04 (2006.01) C03B 29/08 (2006.01) C03B 35/16 (2006.01)
Patent
CA 1190747
GLASS SHEET ROLLER CONVEYOR FURNACE INCLUDING GAS JET PUMP HEATING ABSTRACT OF THE DISCLOSURE A roller conveyor furnace (12) is disclosed as including at least one gas jet pump (24) for pro- viding forced convection heating of glass sheets during conveyance on rolls (22) of the furnace con- veyor (20). A source (26) of compressed gas loca- ted externally of the furnace is communicated with the gas jet pump to supply a primary gas flow thereto and induce an amplified extent of a secon- dary gas flow in order to provide a combined flow of heated gas that produces the forced convection heating. Upper and lower arrays (70,72) of the gas jet pumps are disclosed as being usable sepa- rately or in cooperation with each other in one embodiment to maintain temperature uniformity and glass sheet planarity. Each array includes an as- sociated conduit support (74,76) that mounts the gas jet pumps thereof in a spaced relationship transverse to the direction of conveyance either above or below the conveyor rolls. In another em- bodiment, the compressed gas supplied to the gas jet pumps (24) is heated to provide the primary source fox heating the furnace. One gas jet pump utilized comprises a simple jet opening, while another pump comprises a restricted opening and a contoured surface along which the primary gas flow is guided, and a further pump includes a de- flector that initially guides the primary gas flow from a restricted opening along the contoured surface.
394882
Mcmaster Harold A.
Smart & Biggar
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