Title: Glass treating furnace

Abstract: A furnace for treating glass sheet material and the like in a glass tempering system. The furnace includes an upper glass treating zone and a lower gas treating and distributing zone for homogenizing gases of different temperatures to minimize exposure of the sheet being treated in the treating zone to uneven temperatures. Diametrically opposed inlets and outlets are provided in the side walls controlled by doors, and a slot in the top wall extends between the inlets and outlets to permit movement of a material carrier through the furnace. A pressure chamber communicates with the slot to cool conveyor elements at the top of the furnace, and also to provide a pressure barrier resisting the escape of gases from the furnace through the slots. Air curtains impinge on the tops of the doors in their closed positions to reduce leakage at the top of the doors.

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Inventors: McMaster, Harold A. (Woodville, OH, US)
Nitschke, Norman C. (Perrysburg, OH, US)

Application Number: 542152
Filing Date: 1975-01-20
Publication_date: 1976-05-18
Assignee:
Primary Class(es): 65/350 65/349, 432/64, 432/126, 432/145, 432/176, 432/185, 432/250
Other Classes:
US Patent Ref:

1311286	Jul, 1919	Munhollon	432/176.
1868824	Jul, 1932	Grapp	432/176.
2089250	Aug, 1937	Cone	432/145.
2664838	Jan, 1954	Sorensen	432/250.
2819889	Jan, 1958	Dany	432/64.
2841925	Jul, 1958	McMaster	65/350.

Other Refs:
Primary Examiner: Kellogg, Arthur D.
Assistant Examiner:
Attorney: Reising, Ethington, Barnard, Perry & Brooks