CONTROLLING THICKNESS OF NEWLY DRAWN GLASS SHEET
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Abstract
Variation in temperature profile across the width of newly formed glass sheet produces objectionable thickness variations which adversely effect optical quality. Precision control of the temperature profile across the width of newly drawn sheet glass is obtained through the provisions of a plurality of closed spaced, individually regulated fluid control jets or tubes positioned across the width of such sheet within a closure with the exit ends of such tubes being shielded from the glass by means of a wall member having high conductivity, low expansion, and high emissivity.
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