Patents by Inventor Gautam Narendra Kudva
Gautam Narendra Kudva has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20180079675Abstract: A glass forming apparatus and method include a cooling mechanism in a wall of the apparatus that enhances radiation heat transfer between the glass and the wall of the apparatus and is tunable in both the vertical and horizontal directions. The apparatus and method also include a heating mechanism that affects radiation heat transfer between the glass and the wall of the apparatus, is tunable in both the vertical and horizontal directions, and is independently operable from the cooling mechanism.Type: ApplicationFiled: April 8, 2016Publication date: March 22, 2018Inventors: Bushra Afzal, Anmol Agrawal, Kenneth William Aniolek, John Michael Feenaughty, Ming-Huang Huang, Gautam Narendra Kudva, Shawn Rachelle Markham, Ilia Andreyevich Nikulin
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Publication number: 20170369356Abstract: Methods and apparatus provide for: conveying a glass web from a source toward a destination in a transport direction; scoring the glass web in a width direction thereof to produce a score line having a plurality of separated score segments, thereby defining a section of the glass web between the score line and a leading edge of the glass web; supporting the glass web such that an increasing portion of the section of the glass web becomes cantilevered as the glass web is conveyed such that the portion of the section of the glass web is sufficiently large to generate stress in the respective score segments and drive respective cracks through the thickness of the glass web; and permitting the section of the glass web to separate from the glass web along the score line.Type: ApplicationFiled: January 22, 2016Publication date: December 28, 2017Inventors: Robertson Dewhurst Booth, Douglas Edward Brackley, Michael Vincent Ficarra, Andrew Peter Kittleson, Gautam Narendra Kudva, Eric Lee Miller, Ian David Tracy
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Patent number: 9708136Abstract: Non-contact, liquid-ejecting bearings (3) are provided for conveying flexible glass sheets (13), such as LCD substrates, at high conveyance speeds, e.g., speeds of 15 meters/minute and above. The operating parameters and physical properties of the bearings satisfy at least one of the following conditions: (a) the average flow rate from the bearing's orifices (22) is in the range of 100-800 milliliters/minute/orifice; (b) the orifices' average horizontal pitch (P) is in the range of 20-55 millimeters; and/or (c) the orifices' average size (e.g., D0) is in the range of 1.0-4.5 millimeters. The bearings (3) can reduce the time-averaged, peak-to-peak variation in the spacing between a LCD substrate (13) traveling at 15 meters/minute and the face (20) of the bearing (3) to less than 100 microns, thus reducing the chances that the bearing (3) will lose control of the substrate (13) or that the substrate (13) will hit the bearing (3).Type: GrantFiled: September 13, 2011Date of Patent: July 18, 2017Assignee: Corning IncorporatedInventors: Gautam Narendra Kudva, Weiwei Luo, Yoshihiro Nakamura, Tetsuzou Yamada
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Publication number: 20170197864Abstract: A method of continuously processing glass ribbon having a thickness<0.3 mm. The method includes providing a glass processing apparatus having a first processing zone, a second processing zone and a third processing zone. The glass ribbon is continuously fed from the first processing zone, through the second processing zone to the third processing zone. The feed rate of the glass ribbon is controlled through each processing zone using a global control device. A first buffer zone is provided between the first processing zone and the second processing zone in which the glass substrate is supported in a first catenary between two, spaced-apart, payoff positions. A second buffer zone is provided between the second processing zone and the third processing zone in which the glass substrate is supported in a second catenary between two, spaced-apart, payoff positions.Type: ApplicationFiled: July 7, 2015Publication date: July 13, 2017Inventors: Tomohiro Aburada, Jeffrey Robert Amadon, Douglas Edward Brackley, Gautam Narendra Kudva, Gary Edward Merz, Eric Lee Miller, Michael Yoshiya Nishimoto, Ian David Tracy, Matthew Daniel Trosa, Rui Zhang
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Patent number: 9682882Abstract: Methods for producing a glass ribbon include the step of drawing a glass ribbon from a quantity of molten glass and detecting an instability in the glass ribbon. In response to the detected instability, the method can further include the step of automatically adjusting an operating variable for each of a plurality of stabilizing elements simultaneously with a controller to at least partially counter the detected instability.Type: GrantFiled: July 17, 2014Date of Patent: June 20, 2017Assignee: Corning IncorporatedInventors: Tomohiro Aburada, Jeffrey Robert Amadon, Adam Charles Berkey, Terrence Richard Horsfall, Gautam Narendra Kudva, Michael Yoshiya Nishimoto
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Patent number: 9670086Abstract: A glass manufacturing apparatus comprises a forming device configured to produce a glass ribbon and a control device configured to independently operate a first pull roll apparatus and a second pull roll apparatus such that at least one of a first upstream pair of draw rolls rotates with a substantially constant torque and at least one of a first downstream pair of draw rolls rotates with a substantially constant angular velocity. In further examples, methods of manufacturing a glass ribbon are provided.Type: GrantFiled: March 9, 2016Date of Patent: June 6, 2017Assignee: Corning IncorporatedInventors: James Gary Anderson, Steven Roy Burdette, Liam Ruan de Paor, Lewis Kirk Klingensmith, Gautam Narendra Kudva, Gary Graham Squier, David John Ulrich
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Patent number: 9593033Abstract: A glass manufacturing apparatus comprises a forming device configured to produce a glass ribbon and a control device configured to independently operate a first pull roll apparatus, a second pull roll apparatus, and a third pull roll apparatus such that at least one of a first upstream pair of draw rolls rotates with a substantially constant torque, at least one of a first midstream pair of draw rolls rotates with a substantially constant torque, and at least one of a first downstream pair of draw rolls rotates with a substantially constant angular velocity. In further examples, methods of manufacturing a glass ribbon are provided.Type: GrantFiled: October 4, 2013Date of Patent: March 14, 2017Assignee: Corning IncorporatedInventors: Tomohiro Aburada, Steven Roy Burdette, Masumi Kihata, Chris Scott Kogge, Gautam Narendra Kudva, Michael Yoshiya Nishimoto, Gary Graham Squier, David John Ulrich
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Patent number: 9388065Abstract: A glass manufacturing apparatus is described herein that comprises a forming device configured to produce a glass ribbon and a pull roll device which draws the glass ribbon downward from the forming device. The pull roll device has a first roll apparatus, a second roll apparatus, and a third roll apparatus. The pull roll device is configured to at least independently operate the first roll apparatus and the second roll apparatus such that at least one of a first upstream pair of draw rolls rotates with a substantially constant torque and at least one of a first downstream pair of draw rolls rotates with a substantially constant angular velocity. In further examples, methods of manufacturing a glass ribbon are provided.Type: GrantFiled: May 29, 2013Date of Patent: July 12, 2016Assignee: Corning IncorporatedInventors: Anmol Agrawal, Steven Roy Burdette, Gautam Narendra Kudva, Michael Yoshiya Nishimoto, Vinay Patel
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Publication number: 20160185644Abstract: A glass manufacturing apparatus comprises a forming device configured to produce a glass ribbon and a control device configured to independently operate a first pull roll apparatus and a second pull roll apparatus such that at least one of a first upstream pair of draw rolls rotates with a substantially constant torque and at least one of a first downstream pair of draw rolls rotates with a substantially constant angular velocity. In further examples, methods of manufacturing a glass ribbon are provided.Type: ApplicationFiled: March 9, 2016Publication date: June 30, 2016Inventors: James Gary Anderson, Steven Roy Burdette, Liam Ruan de Paor, Lewis Kirk Klingensmith, Gautam Narendra Kudva, Gary Graham Squier, David John Ulrich
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Patent number: 9321677Abstract: A glass element having a thickness from 25 ?m to 125 ?m, a first primary surface, a second primary surface, and a compressive stress region extending from the first primary surface to a first depth, the region defined by a compressive stress ?I of at least about 100 MPa at the first primary surface. Further, the glass element has a stress profile such that when the glass element is bent to a target bend radius of from 1 mm to 20 mm, with the center of curvature on the side of the second primary surface so as to induce a bending stress ?B at the first primary surface, ?I+?B<0. Still further, the glass element has a puncture resistance of ?1.5 kgf when the first primary surface of the glass element is loaded with a tungsten carbide ball having a diameter of 1.5 mm.Type: GrantFiled: January 21, 2015Date of Patent: April 26, 2016Assignee: Corning IncorporatedInventors: Theresa Chang, Polly Wanda Chu, Michael Patrick Donovan, Adam James Ellison, Timothy Michael Gross, Guangli Hu, Gautam Narendra Kudva, Nicholas James Smith
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Patent number: 9315410Abstract: Methods and apparatuses for managing pulling forces applied to a glass ribbon in a draw apparatus are disclosed. The method includes applying a front-side and a rear-side drive torque to a glass. The method further includes calculating automatically with the at least one electronic controller a front-side and a rear-side average pulling force applied to the glass ribbon and corresponding to a first time period of at least one rotation of the front-side or rear-side stub roller, respectively. The front-side average pulling force and the rear-side average pulling force are compared to establish a pulling force differential between the front-side average pulling force and the rear-side average pulling force. One or more of the front-side drive torque or the rear-side drive torque are modified to decrease the pulling force differential between the front-side average pulling force and the rear-side average pulling force.Type: GrantFiled: April 28, 2015Date of Patent: April 19, 2016Assignee: CORNING INCORPORATEDInventors: Chris Scott Kogge, Gautam Narendra Kudva, Michael Yoshiya Nishimoto
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Patent number: 9315409Abstract: A glass manufacturing apparatus comprises a forming device configured to produce a glass ribbon and a control device configured to independently operate a first pull roll apparatus and a second pull roll apparatus such that at least one of a first upstream pair of draw rolls rotates with a substantially constant torque and at least one of a first downstream pair of draw rolls rotates with a substantially constant angular velocity. In further examples, methods of manufacturing a glass ribbon are provided.Type: GrantFiled: November 29, 2011Date of Patent: April 19, 2016Assignee: Corning IncorporatedInventors: James Gary Anderson, Steven Roy Burdette, Liam Ruan de Paor, L. Kirk Klingensmith, Gautam Narendra Kudva, Gary Graham Squier, David John Ulrich
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Publication number: 20160016838Abstract: Methods for producing a glass ribbon include the step of drawing a glass ribbon from a quantity of molten glass and detecting an instability in the glass ribbon. In response to the detected instability, the method can further include the step of automatically adjusting an operating variable for each of a plurality of stabilizing elements simultaneously with a controller to at least partially counter the detected instability.Type: ApplicationFiled: July 17, 2014Publication date: January 21, 2016Inventors: Tomohiro Aburada, Jeffrey Robert Amadon, Adam Charles Berkey, Terrence Richard Horsfall, Gautam Narendra Kudva, Michael Yoshiya Nishimoto
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Publication number: 20150307384Abstract: A glass manufacturing apparatus comprises a forming device configured to produce a glass ribbon and a control device configured to independently operate a first pull roll apparatus and a second pull roll apparatus such that the first pull roll apparatus rotates with a substantially constant torque the second pull roll apparatus rotates with a substantially constant angular velocity. The control device is further configured to adjust the substantially constant torque of the first pull roll apparatus based on an operating condition of at least one of the first pull roll apparatus and the second pull roll apparatus. In further examples, methods of manufacturing a glass ribbon are provided.Type: ApplicationFiled: April 24, 2014Publication date: October 29, 2015Applicant: Corning IncorporatedInventors: Tomohiro Aburada, Jeffrey Robert Amadon, Chris Scott Kogge, Gautam Narendra Kudva
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Patent number: 9145324Abstract: Roller pairs and draw apparatus for processing glass ribbons are disclosed. The roller pairs applying force to a glass ribbon moving through the draw apparatus. The roller pairs include a first roller assembly and a second roller assembly positioned along opposite sides of the glass ribbon. A shaft of the second roller assembly is coupled to an actuation system that includes a repositionable support member allowing translation of the shaft of the second roller assembly in a direction transverse to the draw direction of the glass ribbon, a pneumatic actuator controlling a position of the contact wheel of the second roller assembly in the direction transverse to the draw direction of the glass ribbon, and a pneumatic reservoir in fluid communication with the pneumatic actuator delivering fluid at an elevated pressure to the pneumatic actuator.Type: GrantFiled: December 20, 2012Date of Patent: September 29, 2015Assignee: Corning IncorporatedInventors: Tomohiro Aburada, Masumi Kihata, Gautam Narendra Kudva, Michael Yoshiya Nishimoto, James Paul Peris, George Davis Treichler
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Patent number: 9139462Abstract: A glass manufacturing apparatus includes a control device configured to modify a predetermined diameter of at least one of a first downstream pair of draw rolls in a first downstream equation based on a monitored actual velocity of a first edge portion of a glass ribbon such that a predetermined ribbon velocity of the first edge portion of the glass ribbon in the first downstream equation changes to substantially match the monitored actual velocity without substantially changing a first downstream angular velocity of the at least one of the first downstream pair of draw rolls. In further examples, methods of manufacturing a glass ribbon include the step modifying the predetermined diameter of at least one of a first downstream pair of draw rolls in the first downstream equation based on the monitored actual velocity of the first edge portion of the glass ribbon.Type: GrantFiled: February 26, 2013Date of Patent: September 22, 2015Assignee: Corning IncorporatedInventor: Gautam Narendra Kudva
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Patent number: 9120700Abstract: Methods and apparatus are disclosed for etching flexible glass sheets (13) in which the sheets (13) are transported in a vertical or near vertical orientation past non-contact, liquid-ejecting bearings (3) which apply an etching solution (e.g., an aqueous NaF/H3PO4 solution) to one or both sides of the sheets (13). In certain embodiments, the uppermost liquid-ejecting bearing (3) is above the top edge of the sheet (13) and thus is able to apply etching solution to the top of the sheet. In other embodiments, a top shower (11), which includes a set of spray nozzles (21) located above and distributed along the length of the apparatus, is used to apply etching solution to the top of the sheet (13). Using the disclosed methods and apparatus, glass sheets (13) produced by a fusion process are provided which have areas greater than five square meters and average surface roughness values in the range of 0.5 nanometers to 1.1 nanometers.Type: GrantFiled: March 26, 2010Date of Patent: September 1, 2015Assignee: Corning IncorporatedInventors: Gautam Narendra Kudva, Chih Yuan Lu, Weiwei Luo, Yoshihiro Nakamura, Tetsuzou Yamada
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Publication number: 20150225277Abstract: Methods and apparatuses for managing pulling forces applied to a glass ribbon in a draw apparatus are disclosed. The method includes applying a front-side and a rear-side drive torque to a glass. The method further includes calculating automatically with the at least one electronic controller a front-side and a rear-side average pulling force applied to the glass ribbon and corresponding to a first time period of at least one rotation of the front-side or rear-side stub roller, respectively. The front-side average pulling force and the rear-side average pulling force are compared to establish a pulling force differential between the front-side average pulling force and the rear-side average pulling force. One or more of the front-side drive torque or the rear-side drive torque are modified to decrease the pulling force differential between the front-side average pulling force and the rear-side average pulling force.Type: ApplicationFiled: April 28, 2015Publication date: August 13, 2015Inventors: Chris Scott Kogge, Gautam Narendra Kudva, Michael Yoshiya Nishimoto
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Publication number: 20150210588Abstract: A glass element having a thickness from 25 ?m to 125 ?m, a first primary surface, a second primary surface, and a compressive stress region extending from the first primary surface to a first depth, the region defined by a compressive stress ?I of at least about 100 MPa at the first primary surface. Further, the glass element has a stress profile such that when the glass element is bent to a target bend radius of from 1 mm to 20 mm, with the center of curvature on the side of the second primary surface so as to induce a bending stress ?B at the first primary surface, ?I+?B<0. Still further, the glass element has a puncture resistance of ?1.5 kgf when the first primary surface of the glass element is loaded with a tungsten carbide ball having a diameter of 1.5 mm.Type: ApplicationFiled: January 21, 2015Publication date: July 30, 2015Inventors: Theresa Chang, Polly Wanda Chu, Patrick Joseph Cimo, Michael Patrick Donovan, Adam James Ellison, Timothy Michael Gross, Guangli Hu, Gautam Narendra Kudva, Nicholas James Smith, Butchi Reddy Vaddi, Natesan Venkataraman
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Patent number: 9038418Abstract: Methods and apparatuses for managing pulling forces applied to a glass ribbon in a draw apparatus are disclosed. The method includes applying a front-side and a rear-side drive torque to a glass. The method further includes calculating automatically with the at least one electronic controller a front-side and a rear-side average pulling force applied to the glass ribbon and corresponding to a first time period of at least one rotation of the front-side or rear-side stub roller, respectively. The front-side average pulling force and the rear-side average pulling force are compared to establish a pulling force differential between the front-side average pulling force and the rear-side average pulling force. One or more of the front-side drive torque or the rear-side drive torque are modified to decrease the pulling force differential between the front-side average pulling force and the rear-side average pulling force.Type: GrantFiled: September 25, 2012Date of Patent: May 26, 2015Assignee: Corning IncorporatedInventors: Chris Scott Kogge, Gautam Narendra Kudva, Michael Yoshiya Nishimoto