The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 1976
Filed:
Oct. 15, 1974
John E Sensi, Arnold, PA (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
Movable lateral and longitudinal dam barriers are provided in a glass forming chamber of the type containing a molten metal. The movable lateral dam barriers control longitudinal convection currents in the molten metal to control the temperature of the glass as it moves through the forming chamber. The lateral dam barriers can be moved to change longitudinal convection currents to achieve the optimum temperature conditions in the glass ribbon for producing flat glass of a specific thickness at any desired ribbon speed. The lateral dam barrier can also be moved to change convection currents and glass ribbon temperature to facilitate the change over from producing a glass ribbon of one thickness to a glass ribbon of a different thickness. The movable longitudinal dam barriers control lateral convection currents in the molten metal to flatten the edge-to-edge temperature profile across the ribbon of a glass ribbon moving through the chamber supported on the molten metal.