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Method and apparatus for controlling sheet thickness

A technology to control glass and target thickness, applied in the direction of manufacturing tools, glass blowing, glass forming, etc., can solve the problems of discontinuous thickness, weakening convective cooling limitation, and cannot easily adjust digital control and feedback systems, etc.

Inactive Publication Date: 2014-07-23
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such leaks can lead to uncontrolled heat loss from the flat glass, as well as thickness discontinuities in the flat glass
The system cannot be easily adapted for digital control and feedback systems, which are required for automated control
The resolution of the field of view of the system is limited by the use of convective cooling of the intermediate wall which reduces the effect of heat conduction
Attempts to form a tangible thermal signature are ineffective due to such weakening

Method used

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  • Method and apparatus for controlling sheet thickness
  • Method and apparatus for controlling sheet thickness
  • Method and apparatus for controlling sheet thickness

Examples

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Embodiment Construction

[0045] The present invention will now be described in detail with reference to the accompanying drawings. In this detailed description, numerous specific details are given in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without some or all of these specific details. In other instances, well known features and / or method steps may not have been described in detail so as not to unnecessarily obscure the invention. Additionally, like or identical reference numerals may be used to designate the same or similar elements.

[0046] FIG. 1 illustrates a system and process for forming a glass ribbon 113 having a controlled thickness. A pull-down forming member 101 of known construction, such as shown in US Pat. Nos. 1,829,641 and 3,338,696, includes tapered sides 103 , 105 terminating in a wedge-shaped root 107 . The glass ribbon 113 begins as two streams 109, 111...

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Abstract

The invention relates generally to methods and apparatus for forming a glass sheet. More specifically, the invention relates to a method and an apparatus for controlling the thickness of a glass sheet formed from molten glass.

Description

[0001] This application claims the benefit of priority to US Patent Application No. 61 / 251481, filed October 14, 2009. technical field [0002] The present invention generally relates to methods and apparatus for manufacturing glass sheets. More specifically, the present invention relates to methods and apparatus for controlling the thickness of flat glass made from molten glass. Background technique [0003] US Patent No. 3,682,609 describes a system for controlling the thickness of a slab made of molten glass. In the system of US Patent No. 3,682,609, molten glass flows down opposite sides of the forming member and joins at the wedge-shaped root of the forming member to form a sheet of glass. The sheet glass passes between a pair of opposing enclosures having front walls facing the sheet glass. The front wall is made of a material with high thermal conductivity, low expansion, and low emissivity, such as silicon carbide. Disposed within the shroud is a fluid conduit hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B9/00
CPCC03B17/064C03B17/067C03B18/04C03B18/20Y02P40/57
Inventor O·N·博拉塔夫K·R·葛洛S·M·米利洛
Owner CORNING INC
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