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:
Jan. 11, 2005
Filed:
Jan. 31, 2002
Sung-koog OH, Kumi-shi, KR;
Man-seok Seo, Kwangju-Kwangyokshi, KR;
Jin-seong Yang, Kumi-shi, KR;
Mun-hyun DO, Kumi-shi, KR;
Sung-Koog Oh, Kumi-shi, KR;
Man-Seok Seo, Kwangju-Kwangyokshi, KR;
Jin-Seong Yang, Kumi-shi, KR;
Mun-Hyun Do, Kumi-shi, KR;
Samsung Electroncis Co., LTD, Suwon-si, KR;
Abstract
An optical fiber preform manufacturing method whereby a clad layer and core layer are deposited on the inner surface of a preform tube for forming a deposited tube. One end of the deposited tube is shrunk and closed. The deposited tube which has a closed end is arranged extending vertically through a circular heater. A heat is applied to the deposited tube at a temperature lower than the softening point of a deposited tube, exhausting contaminants existing in the interior of the deposited tube while moving the circular heater. The heating temperature of the circular heater is then set to a temperature not lower than the softening point of the deposited tube-to shrink and close the deposited tube.