公开(公告)号：US20170240456A1

公开(公告)日：2017-08-24

申请号：US15432404

申请日：2017-02-14

Applicant: Corning Incorporated

Inventor： Ravindra Kumar Akarapu ,  Ming-Jun Li ,  Anping Liu ,  Barada Kanta Nayak ,  Bruce Warren Reding

IPC: C03B37/12 ,  C03B37/025 ,  G02B6/02

CPC classification number: C03B37/12 ,  C03B37/025 ,  C03B37/02727 ,  C03B2205/20 ,  C03B2205/42 ,  G02B5/10 ,  G02B6/02 ,  Y02P40/57

Abstract: A method and corresponding apparatus for processing optical fiber include directing light from a directed light source toward an optical fiber on a fiber draw. A fiber core of the optical fiber is heated, using at least the light from the directed light source, to a fiber core temperature within a glass transformation temperature range of the fiber core. The method can be used to reduce fictive temperature of the fiber core, with Rayleigh scattering being reduced, leading to lower attenuation losses in the fiber core.

公开(公告)号：US11999074B2

公开(公告)日：2024-06-04

申请号：US17634771

申请日：2020-08-07

Applicant: CORNING INCORPORATED

Inventor： Ravindra Kumar Akarapu ,  Priyank Paras Jain ,  Xinghua Li ,  John Forrest Wight, Jr.

IPC: B28B11/24 ,  B28B3/26

CPC classification number: B28B11/243 ,  B28B3/269

Abstract: An extrusion system (100) according to certain aspects includes at least one infrared emitting device (102) arranged in a generally cylindrical shape with a hollow interior. The at least one infrared emitting device (102) is positioned downstream of an outlet of an extrusion die (110) to irradiate a perimeter of wet extrudate material in a uniform manner to form stiffened wet extrudate material (116) before such material is received by an extrudate support channel (118). The at least one infrared emitting device (102) generally uniformly stiffens the skin of the wet extrudate material (116) to resist mechanical deformation of the extrudate material during subsequent handling steps. Such skin stiffening allows for increased tolerance of handling forces and permits extrusion of softer wet extrudate material without compromising the shape of a fired ceramic product.

公开(公告)号：US11952305B2

公开(公告)日：2024-04-09

申请号：US17490720

申请日：2021-09-30

Applicant: CORNING INCORPORATED

Inventor： Ravindra Kumar Akarapu ,  Joel Patrick Carberry ,  David Alan Deneka ,  Steven Akin Dunwoody ,  Kenneth Edward Hrdina ,  John Michael Jewell ,  Yuanjie Jiang ,  Nikolaos Pantelis Kladias ,  Ming-Jun Li ,  Barada Kanta Nayak ,  Dale Robert Powers ,  Chunfeng Zhou ,  Vincent Matteo Tagliamonti ,  Christopher Scott Thomas

IPC: C03B37/027 ,  C03B37/029

CPC classification number: C03B37/02727 ,  C03B37/029 ,  C03B2205/55 ,  C03B2205/56

Abstract: In some embodiments, a method for processing an optical fiber includes: drawing an optical fiber through a draw furnace, conveying the optical fiber through a flame reheating device downstream from the draw furnace, wherein the flame reheating device comprises one or more burners each comprising: a body having a top surface and an opposing bottom surface, an opening within the body extending from the top surface through the body to the bottom surface, wherein the optical fiber passes through the opening, and one or more gas outlets within the body; and igniting a flammable gas provided by the one or more gas outlets to form a flame encircling the optical fiber passing through the opening, wherein the flame heats the optical fiber by at least 100 degrees Celsius at a heating rate exceeding 10,000 degrees Celsius/second.

公开(公告)号：US11130701B2

公开(公告)日：2021-09-28

申请号：US16910266

申请日：2020-06-24

Applicant: CORNING INCORPORATED

Inventor： Ravindra Kumar Akarapu ,  Garrett Andrew Piech ,  Sergio Tsuda ,  James Andrew West

IPC: C03B33/08 ,  B23K26/53 ,  B23K26/06 ,  B23K26/00 ,  B23K26/067 ,  B23K26/073 ,  B23K26/08 ,  B23K26/38 ,  C03B33/10 ,  B23K103/00

Abstract: A method for laser processing a transparent workpiece includes forming a contour line that includes defects, by directing a pulsed laser beam output by a beam source through an aspheric optical element positioned offset in a radial direction from the beam pathway and into the transparent workpiece such that the portion of the pulsed laser beam directed into the transparent workpiece generates an induced absorption within the transparent workpiece that produces a defect within the transparent workpiece. The portion of the pulsed laser beam directed into the transparent workpiece includes a wavelength λ, an effective spot size wo,eff, and a non-axisymmetric beam cross section having a minimum Rayleigh range ZRx,min in an x-direction and a minimum Rayleigh range ZRy,min in a y-direction. Further, the smaller of ZRx,min and ZRy,min is greater than F D = π ⁢ ⁢ w 0 , eff 2 λ , where FD is a dimensionless divergence factor comprising a value of 10 or greater.

公开(公告)号：US20190255735A1

公开(公告)日：2019-08-22

申请号：US16308222

申请日：2017-06-07

Applicant: Corning Incorporated

Inventor： Ravindra Kumar Akarapu ,  Priyank Paras Jain ,  Christopher John Malarkey ,  Barada Kanta Nayak

IPC: B28B11/16 ,  B28B3/20 ,  B01D46/00 ,  B01D46/24 ,  B01D53/94 ,  F01N3/28

Abstract: A method of manufacturing a honeycomb body, comprising extruding honeycomb extrudate (200) in an axial direction (A), the honeycomb extrudate (200) having an outer periphery (206); and laser machining in situ the honeycomb extrudate (200) to form a laser cut in the honeycomb extrudate. A system for in situ cutting a wet green ceramic extrudate, comprising a laser (500, 732, 826) configured to irradiate laser energy to an outer periphery of a wet green ceramic article, the laser energy adapted to cut through at least a portion of the outer periphery (206).

公开(公告)号：US11745384B2

公开(公告)日：2023-09-05

申请号：US16954250

申请日：2018-12-16

Applicant: CORNING INCORPORATED

Inventor： Ravindra Kumar Akarapu ,  Amit Halder ,  Priyank Paras Jain ,  Weidong Li

IPC: B28B3/26 ,  B29C48/11 ,  B29C48/32 ,  B29C48/30 ,  B29C48/345 ,  B29C48/00 ,  B01D46/24 ,  B01D53/94 ,  B01J35/04 ,  B28B3/20 ,  F01N3/28

CPC classification number: B28B3/269 ,  B29C48/022 ,  B29C48/11 ,  B29C48/30 ,  B29C48/32 ,  B29C48/345 ,  B01D46/2418 ,  B01D53/94 ,  B01D2255/9155 ,  B01D2279/30 ,  B01J35/04 ,  B23H2200/30 ,  B28B2003/203 ,  F01N3/2828 ,  F01N2330/06 ,  F01N2330/48

Abstract: A thin-walled honeycomb body (100) having a plurality of repeating cell structures (110) formed of intersecting porous thick walls (112V, 112H) and thin walls (114V, 114H). Each repeating cell structure (110) is bounded on its periphery by the thick walls (112V, 122H) of a first transverse thickness (Tk) and the thin walls (114V, 114H) have a second transverse thickness (Tt) that subdivides each repeating cell structure (110) into between 7 and 36 individual cells (108). In the thin-walled honeycomb body (100), the first transverse thickness (Tk) of the thick walls (112V, 112H) is less than or equal to 0.127 mm (0.005 inch) and the second transverse thickness (Tt) of the thin walls (114V, 114H) is less than or equal to 0.0635 mm (0.0025 inch), and Tk>Tt. Honeycomb extrusion dies and methods of manufacturing the thin-walled honeycomb body (100) having thick walls (112V, 112H) and thin walls (114V, 114H) are provided.

公开(公告)号：US20220332013A1

公开(公告)日：2022-10-20

申请号：US17634804

申请日：2020-08-07

Applicant: CORNING INCORPORATED

Inventor： Ravindra Kumar Akarapu ,  Amit Halder ,  Xinghua Li

IPC: B28B11/24 ,  B28B3/26 ,  B28B17/00

Abstract: An extrusion system (100) includes at least one sensor (102, 104) to detect localized presence of oil (701) on an exterior surface (715) or skin of wet extrudate material (714 e.g., ceramic material having a honeycomb cross-sectional shape), and at least one infrared emitting device (106, 108) configured to impinge infrared emissions on at least a portion of the exterior surface responsive to one or more sensor signals. Localized impingement of infrared emissions may reduce presence of oil streaks (701) without undue differential drying of the extrudate skin (715), and avoid surface fissures that would otherwise result in fired ceramic bodies. Separately controllable infrared emitters (502), or at least one controllable infrared blocking or redirecting element (603), may be used to impinge infrared emissions on selected areas. A humidification section (120) arranged downstream of infrared emitters (106, 108) may be used to at least partially rehydrate the wet extrudate material, if necessary.

公开(公告)号：US20200331793A1

公开(公告)日：2020-10-22

申请号：US16910266

申请日：2020-06-24

Applicant: CORNING INCORPORATED

Inventor： Ravindra Kumar Akarapu ,  Garrett Andrew Piech ,  Sergio Tsuda ,  James Andrew West

IPC: C03B33/08 ,  B23K26/53 ,  B23K26/06 ,  B23K26/00 ,  B23K26/067 ,  B23K26/073 ,  B23K26/08 ,  B23K26/38 ,  C03B33/10

Abstract: A method for laser processing a transparent workpiece includes forming a contour line that includes defects, by directing a pulsed laser beam output by a beam source through an aspheric optical element positioned offset in a radial direction from the beam pathway and into the transparent workpiece such that the portion of the pulsed laser beam directed into the transparent workpiece generates an induced absorption within the transparent workpiece that produces a defect within the transparent workpiece. The portion of the pulsed laser beam directed into the transparent workpiece includes a wavelength λ, an effective spot size wo,eff, and a non-axisymmetric beam cross section having a minimum Rayleigh range ZRx,min in an x-direction and a minimum Rayleigh range ZRy,min in a y-direction. Further, the smaller of ZRx,min and ZRy,min is greater than FDπw0,eff2/λ, where FD is a dimensionless divergence factor comprising a value of 10 or greater.

公开(公告)号：US20180093914A1

公开(公告)日：2018-04-05

申请号：US15718848

申请日：2017-09-28

Applicant: CORNING INCORPORATED

Inventor： Ravindra Kumar Akarapu ,  Garrett Andrew Piech ,  Sergio Tsuda ,  James Andrew West

IPC: C03B33/08 ,  C03B33/10 ,  B23K26/00 ,  B23K26/06 ,  B23K26/073 ,  B23K26/08 ,  B23K26/38 ,  B23K26/067

Abstract: A method for laser processing a transparent workpiece includes forming a contour line that includes defects, by directing a pulsed laser beam output by a beam source through an aspheric optical element positioned offset in a radial direction from the beam pathway and into the transparent workpiece such that the portion of the pulsed laser beam directed into the transparent workpiece generates an induced absorption within the transparent workpiece that produces a defect within the transparent workpiece. The portion of the pulsed laser beam directed into the transparent workpiece includes a wavelength λ, an effective spot size wo,eff, and a non-axisymmetric beam cross section having a minimum Rayleigh range ZRx,min in an x-direction and a minimum Rayleigh range ZRy,min in a y-direction. Further, the smaller of ZRx,min and ZRy,min is greater than F D  π   w 0 , eff 2 λ , where FD is a dimensionless divergence factor comprising a value of 10 or greater.

公开(公告)号：US20150352748A1

公开(公告)日：2015-12-10

申请号：US14295536

申请日：2014-06-04

Applicant: Corning Incorporated

Inventor： Ravindra Kumar Akarapu ,  Derik Alan Bruins ,  Jacob George ,  Amit Halder ,  Charlotte Diane Milia ,  Kaitlin Smith Olmstead

IPC: B29C35/04

CPC classification number: B29C35/04 ,  B28B11/241 ,  B28B11/243 ,  B28B17/0081 ,  B29C2035/0822 ,  B29C2035/0855 ,  C04B41/0072 ,  C04B41/009 ,  C04B41/5089 ,  C04B41/85 ,  C04B2111/00793 ,  F26B2210/02 ,  C04B35/00 ,  C04B38/0006 ,  C04B35/195 ,  C04B14/465 ,  C04B41/5035

Abstract: A method and system to dry crack-free and high strength skin including an inorganic binder of an average particle size (D50) in a range between 10 nm and 700 nm on a porous ceramic body. The method includes supporting the honeycomb body on an end face such that axial channels and outer periphery are substantially vertical. A gas is flowed past the honeycomb body substantially parallel to the axial channel direction, substantially equally around the outer periphery of the skin, to uniformly dry the skin to form a partially dried skin under mild conditions. Then the partially dried skin may be dried more severely resulting in rapidly dried crack-free and high strength skin.

Abstract translation: 包括在多孔陶瓷体上的平均粒度（D50）为10nm〜700nm的无机粘合剂的无裂纹高强度皮肤的方法和系统。 该方法包括将蜂窝体支撑在端面上，使得轴向通道和外周基本垂直。 基本平行于轴向通道方向的气体大致均匀地流过蜂窝体，使皮肤均匀地干燥皮肤以在温和的条件下形成部分干燥的皮肤。 然后部分干燥的皮肤可能被更严重地干燥，导致快速干燥的无裂纹和高强度的皮肤。