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:
Mar. 12, 2013
Filed:
Aug. 23, 2011
Kenneth William Aniolek, Painted Post, NY (US);
Steven Roy Burdette, Big Flats, NY (US);
Liam Ruan DE Paor, Lexington, KY (US);
Eunyoung Park, Elmira, NY (US);
Kenneth William Aniolek, Painted Post, NY (US);
Steven Roy Burdette, Big Flats, NY (US);
Liam Ruan de Paor, Lexington, KY (US);
Eunyoung Park, Elmira, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
Methods and apparatus for controlling the stress in, and the shape of, the glass ribbon () formed in a downdraw glass manufacturing process (e.g., the fusion downdraw process) are provided. In certain embodiments, the control is achieved by cooling the bead portions () of the ribbon () at a rate which provides a heat flux Q″at the thickest part of the bead () which is given by Q″=Q″+ΔQ″, where (i) Q″is the heat flux at a transverse position adjacent to the bead portion () at which the ribbon's thickness equals 1.05*t, where tis the final thickness at the ribbon's center line (), and (ii) ΔQ″≧(t/t−1)Q″+10 kilowatts/meter, where tis the thickness of the thickest part of the bead portion. The cooling can take place along the entire length of the ribbon () or at selected locations, e.g., in the portion () of the draw which includes the glass transition temperature region () or the portion () of the draw where individual glass sheets () are cut from the ribbon ().