The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 2017
Filed:
Feb. 18, 2014
Sumitomo Electric Industries, Ltd., Osaka-shi, Osaka, JP;
Iwao Okazaki, Yokohama, JP;
Takashi Yamazaki, Yokohama, JP;
Tatsuya Konishi, Yokohama, JP;
Katsuyuki Tsuneishi, Yokohama, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka-shi, Osaka, JP;
Abstract
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 preformis sealed with a first seal partof the seal mechanism. After a vicinity of a taper part of the optical fiber glass preformstarts to pass through the first seal part, switching to a second seal partarranged above the first seal partis performed, and an outer peripheral surface of a sleeve memberfixed so as to surround an outer periphery of the dummy rodis sealed with the second seal part