专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20200369554A1 OPTICAL FIBER MANUFACTURING METHOD AND OPTICAL FIBER MANUFACTURING APPARATUS 审中-公开
公开(公告)号：US20200369554A1
公开(公告)日：2020-11-26
申请号：US15931983
申请日：2020-05-14
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Takahiro SAITO , Iwao OKAZAKI
IPC分类号： C03B37/025 , C03C25/106
摘要： An optical fiber manufacturing method includes a process of passing a glass fiber through a fiber path before applying a resin. The glass fiber is drawn from a glass preform, the fiber path is formed through a cooling tube, and the cooling tube is housed in a casing and is cooled by a coolant. The process includes supplying a dry gas into a dry space formed between the casing and the cooling tube. The dry gas has a first dew point lower than the temperature of the cooling tube. The process includes measuring, by a dew point meter, a second dew point at one or both of an inlet and an outlet of the fiber path. The process includes controlling the temperature of the coolant in the cooling tube such that the temperature of the cooling tube is higher than the second dew point measured by the dew point meter.

2. 发明公开

US20240264365A1 OPTICAL FIBER 审中-公开
公开(公告)号：US20240264365A1
公开(公告)日：2024-08-08
申请号：US18426451
申请日：2024-01-30
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Yudai WATANABE , Kazuyuki SOHMA , Iwao OKAZAKI , Takahiro NOMURA
IPC分类号： G02B6/02
CPC分类号： G02B6/02395 , G02B6/02004
摘要： The optical fiber includes a glass fiber and a coating resin layer. The coating resin layer includes a primary resin layer and a secondary resin layer. The glass fiber has an outer diameter of from 79 μm to 81 μm. The secondary resin layer has an outer diameter of from 120 μm to 170 μm. The primary resin layer has an in situ elastic modulus of from 0.1 MPa to 0.4 MPa. The secondary resin layer has an in situ elastic modulus of from 1200 MPa to 2800 MPa. A maximum value of amplitude of an amount of eccentricity is 10 μm or less in a spectrum obtained by measuring the amount of eccentricity of the glass fiber and by applying Fourier transform to a waveform representing the amount of eccentricity.

3. 发明申请

US20220127104A1 WINDING DEVICE AND WINDING METHOD 有权
公开(公告)号：US20220127104A1
公开(公告)日：2022-04-28
申请号：US17422910
申请日：2020-01-15
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Takahiro SAITO , Iwao OKAZAKI , Ryutarou MIYAZAKI , Yoshihiro MORIMOTO , Masayuki KATO
IPC分类号： B65H54/02 , B65H57/14
摘要： This winding device includes: a bobbin for winding an optical fiber, the bobbin being a striated body; a cover that covers the outer periphery of the bobbin, the cover having provided thereto a slit that is parallel to the axial direction of the bobbin, and the optical fiber being inserted through the slit; and a roller for directly guiding the optical fiber to the bobbin. In accordance with the bobbin winding barrel diameter of the optical fiber on the bobbin, the bobbin and the roller are caused to move relatively, or the position of the slit in the cover is caused to move in the circumferential direction.

4. 发明公开

US20240053535A1 METHOD FOR MANUFACTURING OPTICAL FIBER AND OPTICAL FIBER 审中-公开
公开(公告)号：US20240053535A1
公开(公告)日：2024-02-15
申请号：US18229343
申请日：2023-08-02
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Takahiro NOMURA , Kazuyuki SOHMA , Iwao OKAZAKI
IPC分类号： G02B6/02 , C03B37/025 , C03C25/106
CPC分类号： G02B6/02395 , C03B37/025 , C03C25/106 , C03B2203/02
摘要： A method for manufacturing an optical fiber includes: melting an optical fiber preform and drawing a glass fiber; applying a resin composition to an outer periphery of the glass fiber; and curing the resin composition applied, wherein an amount of eccentricity of a central axis of the glass fiber, in a cross section perpendicular to the central axis of the glass fiber, from a central axis relative to an outer periphery of the resin composition or an outer periphery of a coating resin layer formed by curing the resin composition is measured at 50 points or more over a length range of 50 m or more of the glass fiber, and wherein the resin composition is applied such that a mean value a and a standard deviation a of the amount of eccentricity satisfy a+3σ≤10 μm.

5. 发明申请

US20220024800A1 SEAL STRUCTURE OF WIRE DRAWING FURNACE FOR OPTICAL FIBER, AND PRODUCTION METHOD FOR OPTICAL FIBER 有权
公开(公告)号：US20220024800A1
公开(公告)日：2022-01-27
申请号：US17295630
申请日：2019-11-20
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Iwao OKAZAKI , Satoshi YOSHIKAWA , Takashi YAMAZAKI , Makoto AOKI
IPC分类号： C03B37/029
摘要： This seal structure of a wire drawing furnace for an optical fiber is for sealing a gap between an upper end opening of the wire drawing furnace for an optical fiber and a glass base material for an optical fiber inserted from the upper end opening into a furnace core tube. This seal structure has: a plurality of blade members circumferentially arranged in contact with a circumferential side surface of the glass base material for an optical fiber; a guide member, provided around the plurality of blade members, for allowing the plurality of blade members to slide linearly toward the circumferential side surface of the glass base material for an optical fiber; and a pushing/pulling action mechanism that causes the blade members to move in the radial direction of the glass base material for an optical fiber. The center of gravity of the plurality of blade members is located behind the tip surface of the guide member.

6. 发明申请

US20150101368A1 OPTICAL FIBER COOLING APPARATUS AND OPTICAL FIBER MANUFACTURING METHOD 审中-公开
公开(公告)号：US20150101368A1
公开(公告)日：2015-04-16
申请号：US14510517
申请日：2014-10-09
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Norihiro UENOYAMA , Iwao OKAZAKI , Manabu SHIOZAKI , Tadashi ENOMOTO
IPC分类号： C03B37/02
CPC分类号： C03B37/02718
摘要： When a lower gauge pressure of a cooling tube part is set at A, and the number of divided units of the cooling tube part is set at N, and a length of each of the divided units of the cooling tube part is set at Li (i=1 to N), and a radius of each of the divided units of the cooling tube part is set at Ri (i=1 to N), and a gas flow rate of a coolant gas passed through each of the divided units of the cooling tube part is set at Qi (i=1 to N), and a viscosity coefficient of a coolant gas is set at μ1, and a radius of an optical fiber is set at r1, and a drawing speed of the optical fiber is set at V1, and a pressure loss of a straight tube part is set at B, and the number of divided units of the straight tube part is set at n, and a length of each of the divided units of the straight tube part is set at LLj (j=1 to n), and a radius of each of the divided units of the straight tube part is set at RRj (j=1 to n), and a gas flow rate of a pressurized gas passed through the straight tube part is set at Qgas, and a viscosity coefficient of the pressurized gas is set at μ2, and a pressure loss of a pressurizing chamber is set at C, and internal pressure correlation constants of the pressurizing chamber are set at D1 to D5, and a shape correction coefficient of the pressurizing chamber is set at k (1≦k≦2), an optical fiber cooling apparatus satisfies the following formula. A−B−kC≦0 where  [ Mathematical   Formula   1 ] A = ∑ i = 1 N  ( - Q i + π   V 1  ( R i 2 - r 1 2 2   ln  ( r 1 / R i ) + r 1 2 ) π 8   μ 1  ( r 1 2 - R i 2 )  ( r 1 2 + R i 2 + R i 2 - r 1 2 ln  ( r 1 / R i ) ) ) × L i   [ Mathematical   Formula   2 ] B = ∑ j = 1 n  - ( Q gas + π   V 1  ( RR j 2 - r 1 2 2   ln  ( r 1 / RR j ) + r 1 2 ) π 8   μ 2  ( r 1 2 - RR j 2 )  ( r 1 2 + RR j 2 + RR j 2 - r 1 2 ln  ( r 1 / RR j ) ) ) × LL j   [ Mathematical   Formula   3 ] C = D   1 + D   2 × Q gas + D   3 × Q gas 2 + D   4 × V   1 + D   5 × Q gas × V   1

7. 发明公开

US20240199480A1 METHOD FOR MANUFACTURING OPTICAL FIBER 审中-公开
公开(公告)号：US20240199480A1
公开(公告)日：2024-06-20
申请号：US18555974
申请日：2022-03-31
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Iwao OKAZAKI , Yuuki SHIBUYA , Keisei MORITA
IPC分类号： C03C25/1065 , C03C25/20 , C03C25/26
CPC分类号： C03C25/1065 , C03C25/20 , C03C25/26
摘要： A method for manufacturing an optical fiber coats a first resin on a glass fiber drawn from a glass base material, and cures the first resin to form a first coating. The method includes causing the glass fiber to travel at a first velocity during a first time period, increasing the velocity from the first velocity to a second velocity during a second time period following the first time period, and maintaining the velocity at the second velocity during a third time period following the second time period. A relationship 1.0

8. 发明公开

US20240192438A1 OPTICAL FIBER 审中-公开
公开(公告)号：US20240192438A1
公开(公告)日：2024-06-13
申请号：US18532022
申请日：2023-12-07
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Takahiro NOMURA , Kazuyuki SOHMA , Yudai WATANABE , Iwao OKAZAKI
IPC分类号： G02B6/02
CPC分类号： G02B6/02395 , G02B6/02004
摘要： The optical fiber includes a glass fiber and a coating resin layer. The coating resin layer includes a primary resin layer and a secondary resin layer. The glass fiber has an outer diameter of from 124 μm to 126 μm. The secondary resin layer has an outer diameter of from 145 μm to 170 μm. The primary resin layer has an in situ elastic modulus of from 0.1 MPa to 0.5 MPa. The secondary resin layer has an in situ elastic modulus of from 1200 MPa to 2800 MPa. A maximum value of amplitude of an amount of eccentricity is 6 μm or less in a spectrum obtained by measuring the amount of eccentricity of the glass fiber and by applying Fourier transform to a waveform representing the amount of eccentricity.

9. 发明申请

US20200369556A1 OPTICAL FIBER MANUFACTURING METHOD AND OPTICAL FIBER MANUFACTURING APPARATUS 审中-公开
公开(公告)号：US20200369556A1
公开(公告)日：2020-11-26
申请号：US16876475
申请日：2020-05-18
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Takahiro SAITO , Iwao OKAZAKI , Yoshihiro MORIMOTO , Makoto AOKI
IPC分类号： C03B37/027 , C03B37/029
摘要： An optical fiber manufacturing method includes a first process of passing a glass fiber through a fiber path. The fiber path is formed through a cooling tube that is housed in a first casing. The method also includes a second process of leading the glass fiber into a second casing before leading into the first casing. The first process includes supplying a first dry gas, having a dew point lower than the temperature of the cooling tube, into a first dry space formed between the first casing and the cooling tube. The second process includes supplying a second dry gas into a second dry space formed inside the second casing so as to cause air pressure in the second dry space to be higher than air pressure in an external space. The dew point of the second dry gas is lower than the dew point in the external space.

10. 发明申请

US20160002090A1 OPTICAL FIBER DRAWING METHOD AND OPTICAL FIBER DRAWING APPARATUS 有权
标题翻译：光纤绘图方法和光纤绘图设备
公开(公告)号：US20160002090A1
公开(公告)日：2016-01-07
申请号：US14769827
申请日：2014-02-18
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Iwao OKAZAKI , Takashi YAMAZAKI , Tatsuya KONISHI , Katsuyuki TSUNEISHI
IPC分类号： C03B37/027 , C03B37/029
CPC分类号： C03B37/02736 , C03B37/029 , C03B2205/80 , C03B2205/92
摘要： Capacity of space in a drawing furnace is decreased so as to reduce variations in pressure in the furnace and also the side of an insertion port of a glass perform is stably sealed. When drawing is started, an outer peripheral surface of the optical fiber glass preform 11 is sealed with a first seal part 17 of the seal mechanism. After a vicinity of a taper part of the optical fiber glass preform 11 starts to pass through the first seal part 17, switching to a second seal part 18 arranged above the first seal part 17 is performed, and an outer peripheral surface of a sleeve member 20 fixed so as to surround an outer periphery of the dummy rod 12 is sealed with the second seal part 18.
摘要翻译：降低了拉丝炉中的空间容量，以减少炉内的压力变化，玻璃的插入口的一侧的稳定的密封。当拉伸开始时，光纤玻璃预制件11的外周表面被密封机构的第一密封部分17密封。在光纤玻璃预制件11的锥形部附近开始通过第一密封部17之后，切换到布置在第一密封部17的上方的第二密封部18，并且套筒部件的外周面固定在包围虚拟棒12的外周的部分20被第二密封部18密封。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式