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Class 65/491 - Diameter or coating thickness


Subclass of Class 65 - Glass manufacturing
Definition: Apparatus including the means to measure, control, or indicate
No. of patents: 71
Last issue date: 12/04/2007


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NumberTitleIssue Date
7302814Apparatus for preventing deflection of substrate tube
An apparatus for producing an optical fiber preform to perform the deposition process by modified chemical vapor deposition. The Apparatus comprises a main heat source location sensor (800) for detecting the location of a main heat source for heating a substr...
12/04/2007
7137279Cap assembly and optical fiber cooling process
A cap assembly for collecting cooling gas from a coolant chamber tube is disclosed. The cap assembly having connecting means and outlet means extending from its side walls being generally shaped and sized for detachable mounting on the body of the cooling gas chambe...
11/21/2006
6958096Systems and methods for coating optical fiber
A fiber coating applicator includes a chamber and a cup positioned over the chamber. The cup is connected to the chamber by an entrance aperture. The chamber includes an exit aperture opposite the entrance aperture. The cup, entrance aperture, chamber, and exit aper...
10/25/2005
6923023Methods and apparatuses for controlling optical fiber primary coating diameter
Methods and apparatuses estimate and control optical fiber primary coating diameter for wet-on-wet optical fiber manufacturing. The primary coating diameter for a particular length of optical fiber is calculated based upon a measurement of the weight of primary and/...
08/02/2005
6923024VAD manufacture of optical fiber preforms with improved deposition control
The specification describes a VAD method for dynamically controlling the growth rate of both the core soot and the cladding soot in response to separate growth monitors. ...
08/02/2005
6907757Drawing method of optical fiber and drawing furnace
The drawing method of the present invention uses a drawing furnace comprising a furnace muffle tube, a furnace body and a heater. According to the method, an optical fiber preform is inserted from the inlet of the furnace muffle tube, the optical fiber preform is me...
06/21/2005
6848276Optical fiber manufacture method, preform manufacture method, and preform manufacture apparatus
A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress o...
02/01/2005
6789399Method for measuring the twisting of an optical fiber, and a method and apparatus for manufacturing optical fibers
When an optical fiber 3 is formed by drawing a preform 1, twisting is generated in the optical fiber 3. An outer diameter of the optical fiber 3 is continuously measured along a longitudinal direction of the optical fiber 3 from tw...
09/14/2004
6571583Device for drawing an optical fiber including a more accurate diameter measuring sensor
A device draws an optical fiber from one end of a preform melted by a furnace, an optical sensor being disposed a the exit from the furnace to measure the diameter of the optical fiber for the purpose of adjusting the tension with which the optical fiber ...
06/03/2003
6553790Process for fabricating optical fiber involving tuning of core diameter profile
A silica-based core rod is traversed by a heat source along its longitudinal axis, to provide heated, softened regions. During the traverse, compressive or tensile movements are provided along the rod's longitudinal axis, these movements inducing, respect...
04/29/2003
6516636Method for producing a tube made of quartz glass using low internal pressure and control of diameters
In a known method for the manufacture of a tube made of a vitreous material, especially of quartz glass, a hollow cylindrical semifinished product made of a vitreous material is carried essentially vertically to a heating zone, wherein it is heated and dr...
02/11/2003
6474105Modulating a diameter-increasing step of a fiber preform with no modulation prior to a predetermined diameter
The method includes axially modulating at least one plasma build-up pass in order to improve the opto-geometrical properties of the preform. The modulation preferably takes place during the final passes of plasma build-up and takes place by modulating the...
11/05/2002
6438997Method of elongating glass preform
In a method of elongating a glass preform comprising the steps of holding both ends of the glass preform 1a with a first holding section 2 and a second holding section 3, respectively; moving the first holding section 2 and the second holding section 3 in...
08/27/2002
6371394Method for winding a fibre element having different longitudinal portions
Method for winding a fiber element onto a support. The fiber element having at least two longitudinal portions (Pi) with different characteristics. The method including the steps of supplying the fiber element to the support and associating wit...
04/16/2002
6314765Method and apparatus for controlling the shape and position of a deformable object
A method and apparatus for controlling the shape and position of a deformable object are described. At least a portion of an object is heated to a temperature sufficient to render the heated portion deformable by a force. An image profile of the heated po...
11/13/2001
6220057Apparatus and method for drawing a glass ingot
A method for drawing a glass ingot comprises holding a vertically suspended glass ingot 5 at an upper end thereof, passing the ingot through a heating furnace 10 having upper and lower openings, and drawing the glass ingot while moving one end or both end...
04/24/2001
6178778Method of stretching an optical fiber preform with monitoring the diameter at two locations
In the manufacturing of optical fiber preform with excellent accuracy of outer diameter made of the rod as drawn from synthetic quartz ingot, the outer diameter measuring devices 67 and 68 measure the outer diameters of the cone 2 and rod 3 drawn from the...
01/30/2001
6138480Apparatus for controlling optical fiber diameter based on initial gob movement
Disclosed is a method of controlling the diameter of a glass rod drawn from a glass preform. The diameter control begins as soon as a glass gob begins to move away from a heated portion of the preform. The velocity of the gob is measured and furnace tempe...
10/31/2000
6098428Process for drawing glass fiber using prediction of future geometric parameter of the fiber
A glass blank is sent to a heating zone where it is softened region by region and drawn continuously in a controlled manner as a drawing bulb is formed. Estimates of at least one controlled variable are predicted free of dead time; in addition, at least o...
08/08/2000
5958102Apparatus and method for making an optical fiber preform using a correction pass
A method for making an optical fiber preform comprises depositing fine particles of glass serving as a dad on the surfaces of a rod-shaped core over a given length of the rod-shaped core by use of a plurality of oxyhydrogen flame burner units, detecting a...
09/28/1999
5944865Apparatus for fabricating an optical fiber coated with metal and method therefor
An apparatus for fabricating an optical fiber coated with metal, constructed with a crucible for melting the optical fiber preform to draw an uncoated optical fiber, a diameter measuring device for measuring the diameter of the uncoated optical fiber to r...
08/31/1999
5942019Elongating apparatus and method for glass preform and furnace body for elongating apparatus
A furnace body for a glass preform elongating apparatus which makes an elongated body by passing the glass preform through the furnace body and elongating the glass preform while heating the glass preform, the furnace body comprising a furnace core tube s...
08/24/1999
5868815Method of making an optical fiber by blowing on a preform tube to enhance collapse
The specification describes a process and apparatus for monitoring and controlling the ellipticity of preform tubes during Modified Chemical Vapor Deposition. In response to computer generated signals from the monitoring device, the tube collapse rate is ...
02/09/1999
5855640Apparatus for delivering a coated glass stream for forming charges of glass
A method for delivering a coated glass stream having a first inner layer and a second outer layer wherein the method includes providing a vertical orifice, delivering molten glass from a first source through the orifice, providing a gap about the orifice ...
01/05/1999
5841524Compact device for monitoring the coating of a moving filamentary product
An apparatus for monitoring a moving filamentary product having a device for monitoring the centering of the filamentary product relative to the coating, and a device for monitoring the quality of the coating. The centering monitoring device includes two ...
11/24/1998
5672193Production apparatus for producing an optical fiber cable
An apparatus for accurately inspecting an electroconductive film using an eddy current and an apparatus for production of an optical fiber which measures on-line the electrical resistance, which shows the state of formation of the electroconductive hermet...
09/30/1997
5558692Optical waveguide preform measurement during manufacture
An apparatus and method for measuring preform diameter and runout during manufacture of the preform. A Keyence LB1201 displacement gauge is used to determine distance between a sensing unit and the surface of an optical waveguide preform. It was found tha...
09/24/1996
5469149Method and apparatus for producing a wound package of an endless thermoplastic material
A method and apparatus for continuously producing an endless thermoplastic material, such as yarn or tape, and winding the material into a package. A physical parameter of the package, such as its diameter or weight, is monitored, and a control signal is ...
11/21/1995
5449393Method and apparatus for detecting irregular part of optical fiber
A method and apparatus are provided for detecting irregular portions of an optical fiber which arise due to microscopic bubbles, bruises, and the like during an optical fiber drawing process. The present invention operates by varying the pulling rate of a...
09/12/1995
5443610Apparatus for controlling fiber diameter during drawing
A system for controlling the drawing of a hermetically-coated optical waveguide fiber from a preform is provided in which two measurements of fiber diameter are made and combined into an overall control signal. The first measurement is made on bare fiber ...
08/22/1995
5366527Method and apparatus for coating optical waveguide fibers
A method and apparatus is provided for controlling the diameter of a coated optical waveguide fiber. The viscosity profile of the coating material is controlled by adjusting the temperature of a portion of the coating assembly based on a measurement of th...
11/22/1994
5221306Method and apparatus for modifying the transverse cross section of a body
The transverse cross section of a body is modified by the steps of: a) determining the extent to which the body has material in excess of a desired shape at a plurality of points, b) exposing the body to a local heat source having a temperature sufficient...
06/22/1993
5208645Method and apparatus for optically measuring the thickness of a coating
A method and an apparatus for measuring the thickness of a coating provided around a cylindrical object such as an optical fiber optically. The cylindrical object is irradiated by a measuring light and the light derived from the object is received by a ph...
05/04/1993
5192350Method of flame finishing optical fiber preforms
A cylindrical piece of glass (4) is subjected to heating passes on a glassmaker's lathe. Possible opto-geometrical defects of said piece of glass are detected and measured and then said defects are corrected by machining the outside surface thereof during...
03/09/1993
5183490Optical fiber soot synthesis apparatus
An optical fiber soot synthesis apparatus which synthesizes around a fiber starting member forming a core of an optical fiber an optical fiber soot forming a cladding and which accurately calculates in real time the mass of the optical fiber soot when dep...
02/02/1993
5176731Device for performing measurements on a transparent object, method of manufacturing a fiber and fiber manufactured by means of said method
In a device for performing measurements on at least partly transparent objects such as optical fibres a radiation beam is directed on the object. The radiation deflected by the object is imaged by means of a lens system (321, 322) on a radiation-sensitive...
01/05/1993
5135554Method and apparatus for continuous sputter coating of fibers
Apparatus and method for continuously forming sputter-coated glass fibers. The apparatus includes a sputter vessel into which freshly drawn fiber is passed before surface contamination can occur. The sputter vessel includes modular sputtering units which ...
08/04/1992
4973343Optical fiber coating control apparatus
In accordance with the invention, the functions of two TV cameras in the prior art for monitoring polymer coating concentricity and/or carbon coating thickness are accomplished by a single TV camera (48). Rather than being projected onto an opaque dispers...
11/27/1990
4964891Programmably controlled fiber glass strand feeders and improved methods for making glass fiber mats
The specification of the instant invention discloses improvements in methods for making various types of mats of fiberous material. In particular, the improvements relate to methods for making continuous fiber glass strand mats using reciprocating strand ...
10/23/1990
4874416Base material of optical fibers and a method for the preparation thereof
In place of the conventional rod-in-tube method, a novel method is proposed for the preparation of a high-quality base material of quartz glass for optical fibers according to which a glassy rod composed of the core portion of a larger refractive index an...
10/17/1989
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