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    3.
    发明专利
    未知

    公开(公告)号：ID19892A

    公开(公告)日：1998-08-20

    申请号：ID989801

    申请日：1998-02-13

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： TSUCHIYA ICHIRO ,  OKUNO KAORU ,  MIYAKI HIDEO ,  OISHI KAZUMASA

    IPC: G02B6/44 ,  C03C25/12 ,  C03C25/18 ,  D06B1/08 ,  C03C25/00 ,  C03C17/00 ,  G02B1/10 ,  C03B37/00

    Abstract: In a resin coating applicator, a holder (14) is fixed on a base (15) fitted to a drawing machine, and in the holder (14), hot water can be circulated from an inlet (18). The inner circumferential surface of the holder (14) is formed into a tapered shape so that the outer circumferential surface of a cup-like member (14) of a cartridge type coating sub-assembly (1) is fitted to the holder (14). The respective outer circumferential surfaces of a nipple (2) and a coating die (3) are cylindrical so as to be fitted to the inner circumferential surfaces of an inner cylindrical member (6), and they are positioned by a step portion. Further, they are pressed from the upper and lower sides by the bottom portion of the cup-like member (4) and a lid member (5). The lid member (5) is fastened to the cup-like member (4) integrally by a thread.

    Process for production of glass preform for optical fiber
    7.
    发明专利
    Process for production of glass preform for optical fiber 未知

    公开(公告)号：AU672268B2

    公开(公告)日：1996-09-26

    申请号：AU5636194

    申请日：1994-02-25

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： ITO MASUMI ,  DANZUKA TOSHIO ,  OHGA YUICHI ,  HOSHINO SUMIO ,  TSUCHIYA ICHIRO

    IPC: C03B8/04 ,  C03B20/00 ,  C03B37/014 ,  G02B6/00 ,  C03B37/018

    Abstract: In order to provide an improved process for the production of a glass preform for an optical fiber which includes substantially no bubble therein and also have a substantially uniform shape, there is provided a process for the production of a glass preform which comprises at least silica for an optical fiber comprising producing a body comprising a rod on which fine glass particles are deposited preferably by the vapor phase reactions and heating the body to vitrify under a reduced atmosphere or a vacuumed atmosphere so that the glass preform is produced; in which process the heating comprises a first heating step of degassing the body at a first heating temperature, a second heating step of shrinking the body at a second heating temperature which is higher than the first heating temperature and which is lower than a third heating temperature, and a third heating step of vitrifying the shrunken body at the third temperature which corresponds to a vitrification temperature of the fine glass particles so as to produce the glass preform.

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