Corning Incorporated

Kenneth William Aniolek

Steven Roy Burdette

Eunyoung Park

Liam Ruan De Paor

Douglas Munroe Beall

Douglas Clippinger Allan

Vladislav Yuryevich Golyatin

Kenneth Richard Miller

Alan Thomas Stephens, Ii

Kiat Chyai Kang

Priyank Paras Jain

Seth Thomas Nickerson

Ilia Andreyevich Nikulin

Alan T Ii Stephens

An apparatus for making a laminate glass ribbon, the glass ribbon having: a center laminate region, a first edge, a second edge, and first, second, third, and fourth, beads portions as defined herein, the apparatus includes: a bead thermal conditioning region including: a fluid source for selectively applying a fluid to one or more of the first, second, third, and fourth bead portions. Also disclosed is a method for bead thermal conditioning in the disclosed laminate fusion apparatus.

Thermal control of the bead portion of a glass ribbon

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&#x2033;at the thickest part of the bead () which is given by Q&#x2033;=Q&#x2033;+&#x394;Q&#x2033;, where (i) Q&#x2033;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) &#x394;Q&#x2033;&#x2267;(t/t&#x2212;1)Q&#x2033;+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 ().

In a method of making a glass sheet using an overflow fusion downdraw process, a glass sheet quality metric level Qis selected, where Qis a measure of allowable retardation in the glass sheet. A glass ribbon temperature Tat which a potential glass ribbon thermal artifact could occur in a glass ribbon while the glass ribbon is being drawn through a drawing machine enclosure is identified. A thermal artifact envelope Eis determined, where Econtains types of glass ribbon thermal artifacts allowable at Tand Q. A glass melt is overflowed from an isopipe to form a glass ribbon at the root of the isopipe. The glass ribbon is drawn below the root of the isopipe through the drawing machine enclosure to form the glass sheet. The drawing machine enclosure is altered at a location corresponding to where the glass ribbon would be at Tsuch that during drawing of the glass ribbon the potential glass ribbon thermal artifact is not formed in the glass ribbon at Tor, if the potential glass ribbon thermal artifact is formed in the glass ribbon at T, the potential glass ribbon thermal artifact is within E.

Method of producing uniform light transmission fusion drawn glass

A radial cell ceramic honeycomb structure is provided that is particularly adapted for use as a catalytic carrier or a particulate filter in an automotive or diesel exhaust system. The honeycomb structure includes a network of interconnected webs having a central axis. The network of webs includes radial webs of varying lengths, only some of which substantially extend the entire radial length of the network, and tangential webs that intersect to define rings of gas-conducting radial cells, and a rounded outer skin that surrounds the cells formed by the interconnected webs. The radial webs extending to the periphery of the network join an inner edge of the outer skin in a substantially orthogonal orientation to reduce thermally generated stresses and to increase strength of the resulting structure. The number of radial webs in the network changes along the radial length at transition zones that are defined by one of the tangential webs such that a desired cell density is achieved across the network.

Radial cell ceramic honeycomb structure

Growing community of inventors

Painted Post, NY, United States of America

Kenneth William Aniolek