Forced convection heating apparatus and process for heating glass sheets therewithin
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United States of America Patent
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-
Apr 4, 2000
Grant Date -
N/A
app pub date -
Jul 13, 1998
filing date -
Jan 19, 1996
priority date (Note) -
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Abstract
A forced convection heating apparatus and process for heating glass sheets therewithin includes a housing (200) having an interior region, a conveyor for conveying the glass sheets through the interior region of the housing (200), a gas burner (204) operably associated with the housing (200) for producing hot combustion gases, thereby providing a heat input to the apparatus. An adjustor (210) is operably connected to, and controls, the inputs to the gas burner (204) to vary the heat input, and, thereby, maintain the temperature of the working fluid at a preselected set point. At least one velocity control for controlling the impingement velocity of the working fluid onto the top and/or bottom surfaces of the glass sheet is also provided. The impingement velocity, and thereby the rate of convective heat exchange between the working fluid and the glass sheet, is controlled independently of the heat input to the apparatus.
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