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    METHOD AND APPARATUS FOR FORMING GLASS TUBING FROM GLASS PREFORMS
    1.
    发明专利
    METHOD AND APPARATUS FOR FORMING GLASS TUBING FROM GLASS PREFORMS 未知

    公开(公告)号：CA3028264A1

    公开(公告)日：2017-12-14

    申请号：CA3028264

    申请日：2017-06-07

    Applicant: CORNING INC

    Inventor： ALLEN MARTIN WADE ,  COOK LAURA BETH ,  FLETCHER TONIA HAVEWALA ,  HAWTOF DANIEL WARREN ,  JAKOBSON PAUL ANTHONY ,  MCENROE DAVID JOHN ,  PALUMBO ANIELLO MARIO

    IPC: C03B23/07 ,  C03B23/047

    Abstract: Methods of forming a glass tube are described. In one embodiment, the method includes heating a glass boule to a temperature above a glass transition temperature of the glass boule, drawing the glass tube from the glass boule in a vertically downward direction, and flowing a pressurized gas through a channel of the glass boule as the glass tube is drawn. The glass boule includes an outer surface defining an outer diameter of the glass boule and a channel extending through the glass boule defining an inner diameter of the glass boule. Drawing the glass tube decreases the outer diameter of the glass boule to an outer diameter of the glass tube and flowing the pressurized gas through the channel increases the inner diameter of the glass boule to an inner diameter of the glass tube. Glass boules, glass tubes, and apparatuses for making the same are also described.

    3.
    发明专利
    未知

    公开(公告)号：BR9810245A

    公开(公告)日：2000-09-19

    申请号：BR9810245

    申请日：1998-06-11

    Applicant: CORNING INC

    Inventor： BLACKWELL JEFFERY L ,  HAWTOF DANIEL WARREN ,  HENDERSON DANNY LEE ,  XIAODONG FU

    IPC: C03B20/00 ,  C01B33/18 ,  C03B8/02 ,  C03B19/14 ,  C03B37/014

    Abstract: The present invention is directed to a method for making silica glass and silica glass preforms. A liquid, preferably halide-free, silicon-containing compound capable of being converted by thermal oxidative decomposition to SiO2 is provided and introduced directly into the flame of a combustion burner, which converts the compound to silica, thereby forming finely divided amorphous soot. The soot is vaporized proximate the site where the liquid is converted into silica glass by atomizing the liquid, preferably with a stream of atomizing gas. A heater proximate the burner face and around the burner flame increases soot capture rate and allows for a reduction of the velocity of the atomizing gas. The amorphous soot is deposited on a receptor surface where, either substantially simultaneously with or subsequently to its deposition, the soot is consolidated into a body of fused silica glass.

    4.
    发明专利
    未知

    公开(公告)号：DE69311841T2

    公开(公告)日：1998-02-12

    申请号：DE69311841

    申请日：1993-04-26

    Applicant: CORNING INC

    Inventor： HARVEY JILL ANN ,  SPICER HENRY ANTHONY ,  HAWTOF DANIEL WARREN

    IPC: G02B6/00 ,  C03B37/027 ,  C03B37/029

    Abstract: A method and apparatus for drawing an optical waveguide fiber which minimizes fiber bow caused by differential stresses in the cladding layer of the fiber are disclosed. The fiber is drawn from a preform (10) which is heated in a draw furnace (12). Gases introduced at the top of the furnace form a boundary layer adjacent to the fiber which passes through the furnace, along with the fiber, into a tube. The tube isolates the fiber from the ambient atmosphere so that the boundary layer of gases established in the furnace remains substantially uniform until the viscosity of the cladding layer of the fiber is high enough to minimize differential stresses around the circumference of the fiber.

    6.
    发明专利
    未知

    公开(公告)号：DE69311841D1

    公开(公告)日：1997-08-07

    申请号：DE69311841

    申请日：1993-04-26

    Applicant: CORNING INC

    Inventor： HARVEY JILL ANN ,  SPICER HENRY ANTHONY ,  HAWTOF DANIEL WARREN

    IPC: G02B6/00 ,  C03B37/027 ,  C03B37/029

    Abstract: A method and apparatus for drawing an optical waveguide fiber which minimizes fiber bow caused by differential stresses in the cladding layer of the fiber are disclosed. The fiber is drawn from a preform (10) which is heated in a draw furnace (12). Gases introduced at the top of the furnace form a boundary layer adjacent to the fiber which passes through the furnace, along with the fiber, into a tube. The tube isolates the fiber from the ambient atmosphere so that the boundary layer of gases established in the furnace remains substantially uniform until the viscosity of the cladding layer of the fiber is high enough to minimize differential stresses around the circumference of the fiber.

    9.
    发明专利
    未知

    公开(公告)号：DE69311841T3

    公开(公告)日：2003-09-18

    申请号：DE69311841

    申请日：1993-04-26

    Applicant: CORNING INC

    Inventor： HARVEY JILL ANN ,  SPICER HENRY ANTHONY ,  HAWTOF DANIEL WARREN

    IPC: G02B6/00 ,  C03B37/027 ,  C03B37/029

    Abstract: A method and apparatus for drawing an optical waveguide fiber which minimizes fiber bow caused by differential stresses in the cladding layer of the fiber are disclosed. The fiber is drawn from a preform (10) which is heated in a draw furnace (12). Gases introduced at the top of the furnace form a boundary layer adjacent to the fiber which passes through the furnace, along with the fiber, into a tube. The tube isolates the fiber from the ambient atmosphere so that the boundary layer of gases established in the furnace remains substantially uniform until the viscosity of the cladding layer of the fiber is high enough to minimize differential stresses around the circumference of the fiber.

    10.
    发明专利
    未知

    公开(公告)号：BR0010012A

    公开(公告)日：2002-01-15

    申请号：BR0010012

    申请日：2000-04-17

    Applicant: CORNING INC

    Inventor： ALLEN MARTIN W ,  HAWTOF DANIEL WARREN ,  POWERS DALE ROBERT ,  CHOWDHURY DIPAKBIN Q ,  BOOKBINDER DANA C

    IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03B37/027 ,  C03B37/00

    Abstract: A method of fabricating an optical waveguide fiber that includes the steps of providing a cylindrical glass optical fiber preform having a longitudinally extending centerline hole, and closing the hole under conditions suitable to result in uniform and symmetric hole closure. The method may include first plugging a first end and a second end of the centerline hole to prevent gas flow therethrough. The method preferably involves closing the centerline hole of the preform by drawing the preform down into an optical waveguide fiber.

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