Apparatus and method for making glass sheet with improved sheet stability

A glass plate and glass ribbon technology, applied in glass cutting devices, glass forming, glass forming, etc., can solve problems affecting plate properties, etc.

Inactive Publication Date: 2012-05-02
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, it has been found that separating a glass sheet from a glass ribbon while the glass is substantially elastic can cause unfavorable motion of the glass ribbon above the separation line, which can propagate into viscoelastic, or even viscous, regions, thereby affecting sheets formed in those regions properties of

Method used

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  • Apparatus and method for making glass sheet with improved sheet stability
  • Apparatus and method for making glass sheet with improved sheet stability
  • Apparatus and method for making glass sheet with improved sheet stability

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Embodiment Construction

[0102] Unless otherwise indicated, all values ​​used in the specification and claims, such as values ​​expressing weight and mole percentages of ingredients, dimensions and certain physical properties, are to be understood in all instances as being modified by the term "about" . It should also be understood that the precise numerical values ​​used in the specification and claims form other embodiments of the invention. Efforts have been made to ensure the accuracy of the numerical values ​​disclosed in the examples. Any measured value, however, inherently contains certain errors necessarily resulting from the standard deviation based on their respective measurement techniques.

[0103] As used herein, in describing and claiming the present invention, the use of the indefinite article "a" or "an" means "at least one" and should not be limited to "only one" unless expressly stated otherwise. Thus, for example, reference to "a suction cup" includes reference to one, two or more...

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Abstract

Apparatus and equipment for making glass sheet from a glass ribbon including scoring, bending and separation in vertical state with improved glass ribbon stability provided by edge restrainers located above the score-line that also travel with substantially the same vertical velocity with the elastic ribbon. The edge restrainers on both sides of the glass ribbon serve to limit the motion and perturbation of the ribbon during scoring, bending and separation, advantageously by tensioning the glass ribbon where needed. The invention can reduce disturbance of the glass ribbon in upstream visco-elastic and / or viscous zones due to scoring, bending and separation, therefore enhance forming process stability and product attributes such as thickness variation, stress and stress variation, and the like. The invention can be particularly advantageous for making glass sheet with large width and / or low thickness using the fusion down-draw, slot down-draw, re-draw down-draw, and other down-draw processes.

Description

[0001] This application claims priority to US Provisional Patent Application No. 61 / 378544, filed August 31, 2010, and US Patent Application No. 12 / 942124, filed November 9, 2010. [0002] Cross-references to related applications [0003] This application claims priority to U.S. Provisional Patent Application Serial No. 61 / 378544, filed August 31, 2010, entitled "APPARATUS AND METHOD FOR MAKING GLASS SHEET WITH IMPROVED SHEET STABILITY," on which this application is based , and its entire contents are incorporated herein by reference. technical field [0004] The present invention generally relates to apparatus and methods for making glass sheets. In particular, the present invention relates to apparatus and methods for stabilizing glass sheets during the formation and processing of glass sheets in a vertical position. The present invention can be used, for example, to prepare glass sheets suitable for LCD glass substrates using a down-draw process, such as a Fusion down-dr...

Claims

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Application Information

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IPC IPC(8): C03B15/02C03B17/06
CPCC03B33/037C03B33/0215B26F3/002C03B33/033Y02P40/57Y10T225/12Y10T225/321Y10T225/325C03B17/00C03B17/06
Inventor G·N·库达瓦L·王W·徐N·周
Owner CORNING INC
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