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1. 发明申请

US20020134114A1 Device for continuously twisting an optical fiber 有权
标题翻译：用于连续扭曲光纤的装置
公开(公告)号：US20020134114A1
公开(公告)日：2002-09-26
申请号：US09994605
申请日：2001-11-28
申请人： THE FURUKAWA ELECTRIC CO., LTD.
发明人： Nobuaki Orita
IPC分类号： C03B037/022
CPC分类号： C03B37/032 , C03B2203/19 , C03B2203/36 , C03B2205/06
摘要： A device for continuously twisting an optical fiber, which can add a sufficient twist to an optical fiber, is provided. Reciprocating rollers reciprocate so that the moving direction would be opposite each other along a center axis of rotation. The optical fiber passes through a gap between the reciprocating rollers and runs in contact with the outer circumferential surface of respective reciprocating rollers in order. Reciprocation of the reciprocating rollers adds a twist to the optical fiber. When null is a contacting angle between the optical fiber and the reciprocating rollers, F is maximum static friction of the optical fiber against the outer circumferential surface of the reciprocating rollers, and T is tension of the optical fiber, the coefficient of friction null between the optical fiber and the outer circumferential surface of the reciprocating rollers is lead from an operational formula of nullnull(1/null)nullIn(F/T). This coefficient of friction is set at a value in a range from not less than 0.6 to not more than 0.9.
摘要翻译：提供一种用于连续扭曲光纤的装置，其可以向光纤增加足够的扭曲。往复滚轮往复运动，使得移动方向沿着中心旋转轴线彼此相对。光纤通过往复运动辊之间的间隙并依次与各个往复运动辊的外圆周表面相接触。往复运动的往复运动辊的往复运动给光纤增加了一个扭曲。当phi是光纤和往复辊之间的接触角时，F是光纤相对于往复辊的外周面的最大静摩擦力，T是光纤的张力，光纤和往复滚轮的外圆周表面从μ=（1 / +）的运算公式引出，在（F / T）中。该摩擦系数设定在0.6以上0.9以下的范围。

2. 发明申请

US20030126890A1 Optical fiber drawing method 审中-公开
标题翻译：光纤拉丝法
公开(公告)号：US20030126890A1
公开(公告)日：2003-07-10
申请号：US10269053
申请日：2002-10-11
申请人： The Furukawa Electric Co., Ltd.
发明人： Nobuaki Orita , Shinpei Todo , Yasuhiro Naka
IPC分类号： C03C025/24
CPC分类号： C03B37/032 , C03B37/027 , C03B37/02718 , C03B2205/42
摘要： A method for fiber drawing of an optical fiber, which method comprises: using a drawing apparatus in which the distance between an outlet of a drawing furnace for heat-drawing from an optical fiber preform and a capstan or pulley where an optical fiber drawn vertically downwards changes its direction toward a take-up device is not less than 14 m; providing, between the outlet of the drawing furnace and an optical fiber cooler arranged below the outlet, a natural cooling space of not less than 1.5 m in which no forced gas flow is generated around the optical fiber, to allow the optical fiber to be cooled naturally; cooling the optical fiber by the optical fiber cooler; and coating the optical fiber with a resin.
摘要翻译：一种用于光纤拉丝的方法，该方法包括：使用拉丝装置，其中从光纤预制棒进行热拉拔的拉丝炉的出口与主轴或滑轮之间的距离，其中光纤垂直向下拉改变其方向朝向卷取装置不小于14米; 在拉丝炉的出口和布置在出口下方的光纤冷却器之间提供不小于1.5m的自然冷却空间，其中在光纤周围不产生强制气体流动，以允许光纤被冷却自然; 用光纤冷却器冷却光纤; 并用树脂涂覆光纤。

3. 发明申请

US20030053778A1 Optical fiber preform and the method of producing the same 有权
标题翻译：光纤预制棒及其制造方法
公开(公告)号：US20030053778A1
公开(公告)日：2003-03-20
申请号：US10242609
申请日：2002-09-13
申请人： THE FURUKAWA ELECTRIC CO., LTD
发明人： Yukio Koumura , Yasuhiro Naka , Nobuaki Orita
IPC分类号： G02B006/16 , C03B037/018
CPC分类号： C03B37/027 , C03B37/01446 , C03B37/01466 , C03B2205/90 , Y02P40/57 , Y10T428/24926 , Y10T428/2495
摘要： An optical fiber preform (1) serving as a material of an optical fiber has a shoulder portion (12) thrusting beyond a middle portion (M) in a base end region (K) which is on the upper side when the optical fiber preform is suspended for a drawing process. The optical fiber preform (1) of this configuration can be easily produced by appropriately setting the heating condition, etc. for the sintering step in the production process. Thus, it is possible to omit the elongating step after the sintering step, thereby simplifying the production process. Further, in the prior-art technique, turbulence is generated in the gas flow in the furnace of the drawing apparatus toward the end of the drawing step, making it impossible to draw in a stable manner. In contrast, in this embodiment, due to the shoulder portion (12), there is a small gap between the inner wall surface of the furnace and the optical fiber preform; due to this small gap, the gas flow is regulated, and the drawing can be conducted in a stable manner even toward the end of the drawing step.
摘要翻译：用作光纤材料的光纤预制件（1）具有在光纤预制件是上侧时位于上侧的基端区域（K）中的超过中间部分（M）的肩部（12）暂停绘制过程。通过在生产过程中适当地设定烧结步骤的加热条件等，可以容易地制造这种结构的光纤预制件（1）。因此，可以省略烧结步骤后的延伸工序，从而简化了制造工序。此外，在现有技术中，在拉拔装置的炉内的气流中产生湍流，使得不可能稳定地绘制。相反，在本实施方式中，由于肩部（12），炉内壁面和光纤预制体之间存在小间隙，由于这种小的间隙，气流被调节，并且即使在拉拔步骤结束时也可以以稳定的方式进行拉伸。

4. 发明申请

US20020166345A1 Resin coating device for optical fiber 审中-公开
标题翻译：光纤树脂涂层装置
公开(公告)号：US20020166345A1
公开(公告)日：2002-11-14
申请号：US10079859
申请日：2002-02-22
申请人： The Furukawa Electric Co, Ltd.
发明人： Yasuhiro Naka , Sinpei Todo , Nobuaki Orita
IPC分类号： C03C025/10
CPC分类号： C03C25/18 , C03C25/106 , C03C25/1065
摘要： There is provided an optical-fiber resin coating device which can uniformly coat resin on an optical fiber at a high fiber-pulling velocity while preventing thickness deviation, outer-diameter variation and breaking of the optical fiber. The optical-fiber resin coating device includes a coating die (2N) with a coating die hole (6N) having at least a taper hole portion (6Na) and a land hole portion (6Nb), a nipple (1) having a nipple hole (5), and at least one intermediate die (2A) disposed between the coating die (2N) and the nipple (1) and having an intermediate die hole (6A). The inner diameter of the intermediate die hole (6A) of the intermediate die (2A) is smaller than the inner diameter of the inlet of the taper hole portion (6Na) of the coating die (2N) and equal to 1.5 times or more and 4 times or less of the inner diameter of the land hole portion (6Nb) of the coating die (2N), the angle of the taper hole portion (6Na) of the coating die (2N) is equal to 8 degrees or less, and the length of the taper hole portion (6Na) of the coating die (2N) is equal to 12 mm or more.
摘要翻译：提供了一种光纤树脂涂覆装置，其可以在防止光纤的厚度偏差，外径变化和断裂的同时以高的拉丝速度在光纤上均匀地涂覆树脂。光纤树脂涂布装置包括具有至少具有锥形孔部分（6Na）和露台孔部分（6Nb）的涂布模孔（6N）的涂料模（2N），具有乳头孔的乳头（1）（5），以及设置在所述涂覆模（2N）和所述乳头（1）之间并具有中间模孔（6A）的至少一个中间模具（2A）。中间模具（2A）的中间模孔（6A）的内径小于涂层模具（2N）的锥孔部分（6Na）的入口的内径，等于1.5倍以上，涂布模具（2N）的接地孔部分（6Nb）的内径的4倍以下时，涂布模具（2N）的锥孔部（6Na）的角度为8度以下，涂层模具（2N）的锥形孔部分（6Na）的长度等于或大于12mm。

5. 发明申请

US20020144523A1 Optical fiber drawing furnace 审中-公开
标题翻译：光纤拉丝炉
公开(公告)号：US20020144523A1
公开(公告)日：2002-10-10
申请号：US09971563
申请日：2001-10-09
申请人： The Furukawa Electric Co., Ltd.
发明人： Nobuaki Orita , Yoshiyuki Sakata
IPC分类号： C03B037/029
CPC分类号： C03B37/029
摘要： An optical fiber drawing furnace, comprising a furnace core tube where an optical fiber preform is inserted, fused with heat by a cylindrical heating element that is provided around the furnace core tube, and drawn to an optical fiber, wherein a protective tube is provided being contacted with an upper end edge of the furnace core tube.
摘要翻译：一种光纤拉丝炉，其特征在于，包括插入有光纤预制棒的炉芯管，通过设置在炉芯管周围的圆筒形加热元件，将其熔化并拉入光纤，其中设置有保护管与炉芯管的上端边缘接触。

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