Fabrication method and fabrication apparatus for porous glass base material for optical fiber
US-10501362-B2 · Dec 10, 2019 · US
US12264097B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12264097-B2 |
| Application number | US-202318481255-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 5, 2023 |
| Priority date | Sep 3, 2019 |
| Publication date | Apr 1, 2025 |
| Grant date | Apr 1, 2025 |
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Provided is a glass particulate deposit manufacturing method for manufacturing a glass particulate deposit comprising mounting a fixing jig on an outer periphery of an outermost pipe of a burner; inserting a burner cover from a tip end of the outermost pipe of the burner; and sandwiching and compressing a part of the fixing jig between the burner cover and the outermost pipe of the burner to fix the burner cover to the burner, wherein an outer diameter of a part of the fixing jig that is not compressed is greater than an inner diameter of a part of the burner cover inserted to the tip end of the outermost pipe of the burner.
Opening claim text (preview).
What is claimed is: 1. A burner comprising: a multi-pipe burner; a burner cover; and a fixing jig mounted on an outer periphery of an outermost pipe of the multi-pipe burner, a part of the fixing jig being sandwiched and compressed between the burner cover and the multi-pipe burner to fix the burner cover to the multi-pipe burner, wherein an outer diameter of a part of the fixing jig that is not compressed is greater than an inner diameter of a part of the burner cover; and an abutting part is formed wherein the part of the fixing jig that is compressed and a part of the fixing jig that is not compressed meet, the abutting part having an end face where the burner cover is in contact. 2. The burner according to claim 1 , wherein the fixing jig contains at least one of PTFE, PFA and polyimide. 3. The burner according to claim 1 , wherein the fixing jig includes a tape or a film wrapped on the outer periphery of the outermost pipe of the multi-pipe burner. 4. The burner according to claim 1 , wherein an inner/outer diameter difference between an inner diameter of the burner cover and an outer diameter of the outermost pipe of the multi-pipe burner in a section orthogonal to a longitudinal direction of the multi-pipe burner at the time when the burner cover is fixed to the multi-pipe burner is equal to or greater than 0.5 mm and equal to or smaller than 4 mm. 5. The burner according to claim 1 , wherein a protruding distance of a tip end of the burner cover from a tip end of the multi-pipe burner is equal to or greater than 20 mm and equal to or smaller than 40 mm.
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