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1. 发明专利

DE69604974T2 未知
公开(公告)号：DE69604974T2
公开(公告)日：2000-04-13
申请号：DE69604974
申请日：1996-07-04
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： TSUCHIYA ICHIRO , KOBAYASHI KOHEI , OHTA HIROAKI , KUWAHARA KAZUYA , TSUNEISHI KATSUYUKI , MIYAKI HIDEO , MATSUDA YASUO
IPC分类号： G02B6/00 , C03B37/027 , C03B37/029 , H05B3/14 , H05B3/44 , H05B3/62 , F27D11/02
摘要： There is provided an optical fiber drawing furnace capable of drawing an optical fiber (20) having small non-circularity, which drawing furnace includes a muffle tube (13), in which an optical fiber preform (15) is supplied, a heater (18) surrounding the muffle tube (13), a plurality of electrode connecting portion (22-25) extending from the heater (18), a plurality of electrodes (29, 30) connected to electrode connecting portions (22-25), and in conjunction therewith to an electric power source (33), and unifying means for unifying the temperature distribution along the circumferential direction. Also, there is provided an optical fiber drawing furnace capable of drawing an optical fiber (20) having small non-circularity, which drawing furnace includes an inner heater (41) surrounding a muffle tube (13), a pair of inner electrode connecting portions (43) extending from the inner heater (41), arranging in opposition to each other across the inner heater (41) and connecting to a power source (39) via a pair of electrodes (44), an outer heater (42) surrounding the inner heater (41), and a pair of outer electrode connecting portions (45) extended from the outer heater (42) and arranged in opposition to each other across the outer heater (42) in a direction perpendicular to opposing direction of the pair of inner electrode connecting portions (43), the outer electrode connecting portions (45) being connected to the power source (39) via a pair of electrodes (46).

2. 发明专利

AU718301B2 Optical fiber drawing furnace 未知
公开(公告)号：AU718301B2
公开(公告)日：2000-04-13
申请号：AU5834196
申请日：1996-07-04
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： TSUCHIYA ICHIRO , KOBAYASHI KOHEI , OHTA HIROAKI , KUWAHARA KAZUYA , TSUNEISHI KATSUYUKI , MIYAKI HIDEO , MATSUDA YASUO
IPC分类号： G02B6/00 , C03B37/027 , C03B37/029 , H05B3/14 , H05B3/44
摘要： There is provided an optical fiber drawing furnace capable of drawing an optical fiber (20) having small non-circularity, which drawing furnace includes a muffle tube (13), in which an optical fiber preform (15) is supplied, a heater (18) surrounding the muffle tube (13), a plurality of electrode connecting portion (22-25) extending from the heater (18), a plurality of electrodes (29, 30) connected to electrode connecting portions (22-25), and in conjunction therewith to an electric power source (33), and unifying means for unifying the temperature distribution along the circumferential direction. Also, there is provided an optical fiber drawing furnace capable of drawing an optical fiber (20) having small non-circularity, which drawing furnace includes an inner heater (41) surrounding a muffle tube (13), a pair of inner electrode connecting portions (43) extending from the inner heater (41), arranging in opposition to each other across the inner heater (41) and connecting to a power source (39) via a pair of electrodes (44), an outer heater (42) surrounding the inner heater (41), and a pair of outer electrode connecting portions (45) extended from the outer heater (42) and arranged in opposition to each other across the outer heater (42) in a direction perpendicular to opposing direction of the pair of inner electrode connecting portions (43), the outer electrode connecting portions (45) being connected to the power source (39) via a pair of electrodes (46).

3. 发明专利

AU7084894A Optical fiber drawing furnace and drawing method 未知
公开(公告)号：AU7084894A
公开(公告)日：1995-02-13
申请号：AU7084894
申请日：1994-07-12
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： NAGAYAMA KATUYA , KOBAYASHI KOUHEI , OHTA HIROAKI , TUTIYA ITIRHO
IPC分类号： C03B37/027 , C03B37/029
摘要： An optical fiber drawing furnace according to the invention comprises a core chamber into which an optical fiber parent material is inserted through the upper end thereof and from which a drawn optical fiber is taken out through an opening provided at the lower end thereof, gas supply means for introducing an inert gas into the core chamber to produce an inert gas atmosphere in the core chamber, heating means provided around the outer periphery of the core chamber for heating the optical fiber parent material to heat and melt the lower portion of the optical fiber parent material for drawing the optical fiber, and an internal core pipe provided inside the core chamber and comprising a cylindrical-shaped portion communicating at the lower portion thereof with the opening of the core chamber and a funnel-shaped portion provided on the upper side of the cylindrical-shaped portion and shaped to gradually increase in diameter toward the top thereof and surround the lower part of a melted portion of the optical fiber parent material.

4. 发明专利

AU5834196A Optical fiber drawing furnace 未知
公开(公告)号：AU5834196A
公开(公告)日：1997-01-16
申请号：AU5834196
申请日：1996-07-04
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： TSUCHIYA ICHIRO , KOBAYASHI KOHEI , OHTA HIROAKI , KUWAHARA KAZUYA , TSUNEISHI KATSUYUKI , MIYAKI HIDEO , MATSUDA YASUO
IPC分类号： G02B6/00 , C03B37/027 , C03B37/029 , H05B3/14 , H05B3/44
摘要： There is provided an optical fiber drawing furnace capable of drawing an optical fiber (20) having small non-circularity, which drawing furnace includes a muffle tube (13), in which an optical fiber preform (15) is supplied, a heater (18) surrounding the muffle tube (13), a plurality of electrode connecting portion (22-25) extending from the heater (18), a plurality of electrodes (29, 30) connected to electrode connecting portions (22-25), and in conjunction therewith to an electric power source (33), and unifying means for unifying the temperature distribution along the circumferential direction. Also, there is provided an optical fiber drawing furnace capable of drawing an optical fiber (20) having small non-circularity, which drawing furnace includes an inner heater (41) surrounding a muffle tube (13), a pair of inner electrode connecting portions (43) extending from the inner heater (41), arranging in opposition to each other across the inner heater (41) and connecting to a power source (39) via a pair of electrodes (44), an outer heater (42) surrounding the inner heater (41), and a pair of outer electrode connecting portions (45) extended from the outer heater (42) and arranged in opposition to each other across the outer heater (42) in a direction perpendicular to opposing direction of the pair of inner electrode connecting portions (43), the outer electrode connecting portions (45) being connected to the power source (39) via a pair of electrodes (46).

5. 发明专利

DE69604974D1 未知
公开(公告)号：DE69604974D1
公开(公告)日：1999-12-09
申请号：DE69604974
申请日：1996-07-04
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： TSUCHIYA ICHIRO , KOBAYASHI KOHEI , OHTA HIROAKI , KUWAHARA KAZUYA , TSUNEISHI KATSUYUKI , MIYAKI HIDEO , MATSUDA YASUO
IPC分类号： G02B6/00 , C03B37/027 , C03B37/029 , H05B3/14 , H05B3/44 , H05B3/62 , F27D11/02
摘要： There is provided an optical fiber drawing furnace capable of drawing an optical fiber (20) having small non-circularity, which drawing furnace includes a muffle tube (13), in which an optical fiber preform (15) is supplied, a heater (18) surrounding the muffle tube (13), a plurality of electrode connecting portion (22-25) extending from the heater (18), a plurality of electrodes (29, 30) connected to electrode connecting portions (22-25), and in conjunction therewith to an electric power source (33), and unifying means for unifying the temperature distribution along the circumferential direction. Also, there is provided an optical fiber drawing furnace capable of drawing an optical fiber (20) having small non-circularity, which drawing furnace includes an inner heater (41) surrounding a muffle tube (13), a pair of inner electrode connecting portions (43) extending from the inner heater (41), arranging in opposition to each other across the inner heater (41) and connecting to a power source (39) via a pair of electrodes (44), an outer heater (42) surrounding the inner heater (41), and a pair of outer electrode connecting portions (45) extended from the outer heater (42) and arranged in opposition to each other across the outer heater (42) in a direction perpendicular to opposing direction of the pair of inner electrode connecting portions (43), the outer electrode connecting portions (45) being connected to the power source (39) via a pair of electrodes (46).

6. 发明专利

AU678028B2 Optical fiber drawing furnace and drawing method 未知
公开(公告)号：AU678028B2
公开(公告)日：1997-05-15
申请号：AU7084894
申请日：1994-07-12
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： NAGAYAMA KATUYA , KOBAYASHI KOUHEI , OHTA HIROAKI , TUTIYA ITIRHO
IPC分类号： C03B37/027 , C03B37/029
摘要： An optical fiber drawing furnace according to the invention comprises a core chamber into which an optical fiber parent material is inserted through the upper end thereof and from which a drawn optical fiber is taken out through an opening provided at the lower end thereof, gas supply means for introducing an inert gas into the core chamber to produce an inert gas atmosphere in the core chamber, heating means provided around the outer periphery of the core chamber for heating the optical fiber parent material to heat and melt the lower portion of the optical fiber parent material for drawing the optical fiber, and an internal core pipe provided inside the core chamber and comprising a cylindrical-shaped portion communicating at the lower portion thereof with the opening of the core chamber and a funnel-shaped portion provided on the upper side of the cylindrical-shaped portion and shaped to gradually increase in diameter toward the top thereof and surround the lower part of a melted portion of the optical fiber parent material.

7. 发明专利

DE69421594T2 未知
公开(公告)号：DE69421594T2
公开(公告)日：2000-05-04
申请号：DE69421594
申请日：1994-07-12
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： NAGAYAMA KATSUYA , KOBAYASHI KOHEI , OHTA HIROAKI , TSUCHIYA ICHIRO
IPC分类号： C03B37/027 , C03B37/029
摘要： An optical fiber drawing furnace according to the invention comprises a core chamber into which an optical fiber parent material is inserted through the upper end thereof and from which a drawn optical fiber is taken out through an opening provided at the lower end thereof, gas supply means for introducing an inert gas into the core chamber to produce an inert gas atmosphere in the core chamber, heating means provided around the outer periphery of the core chamber for heating the optical fiber parent material to heat and melt the lower portion of the optical fiber parent material for drawing the optical fiber, and an internal core pipe provided inside the core chamber and comprising a cylindrical-shaped portion communicating at the lower portion thereof with the opening of the core chamber and a funnel-shaped portion provided on the upper side of the cylindrical-shaped portion and shaped to gradually increase in diameter toward the top thereof and surround the lower part of a melted portion of the optical fiber parent material.

8. 发明专利

DE69421594D1 未知
公开(公告)号：DE69421594D1
公开(公告)日：1999-12-16
申请号：DE69421594
申请日：1994-07-12
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： NAGAYAMA KATSUYA , KOBAYASHI KOHEI , OHTA HIROAKI , TSUCHIYA ICHIRO
IPC分类号： C03B37/027 , C03B37/029
摘要： An optical fiber drawing furnace according to the invention comprises a core chamber into which an optical fiber parent material is inserted through the upper end thereof and from which a drawn optical fiber is taken out through an opening provided at the lower end thereof, gas supply means for introducing an inert gas into the core chamber to produce an inert gas atmosphere in the core chamber, heating means provided around the outer periphery of the core chamber for heating the optical fiber parent material to heat and melt the lower portion of the optical fiber parent material for drawing the optical fiber, and an internal core pipe provided inside the core chamber and comprising a cylindrical-shaped portion communicating at the lower portion thereof with the opening of the core chamber and a funnel-shaped portion provided on the upper side of the cylindrical-shaped portion and shaped to gradually increase in diameter toward the top thereof and surround the lower part of a melted portion of the optical fiber parent material.

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