The Furukawa Electric Co., Ltd.

Akira Nogami

Yoshinori Ishida

Yukio Kohmura

Toshihiro Mikami

Nobuyoshi Mine

Toshiaki Nakao

Katsuo Yamamoto

Seiji Fukushima

Shoji Tomioka

Hisatsugu Nakamura

An optical fiber soot synthesis apparatus which synthesizes around a fiber starting member forming a core of an optical fiber an optical fiber soot forming a cladding and which accurately calculates in real time the mass of the optical fiber soot when deposited so as to control the synthesis of the optical fiber soot. The optical fiber soot synthesis apparatus measures the weight of the rotating fiber starting member and optical fiber soot by a pair of soot weight detection sensors arranged at a fiber starting member support and rotational drive mechanisms divided so as to prevent the weight of the rotational drive mechanisms from having much of an effect. The computation and control apparatus performs operational processing from the measured weights and calculates the mass of only the optical fiber soot synthesized on the fiber starting member in real time. The computation and calculation apparatus refers to the calculated mass to control the synthesis of the optical fiber soot.

Optical fiber soot synthesis apparatus

A vulcanization apparatus for a continuous length of article comprises a curved vulcanizing pipe devised to ensure, with the aid of a heating liquid medium recirculation system assembled thereto, a stable and even vulcanization of such a continuous length of article without damaging the same, a tubular cleaner for removing the heating liquid medium deposited on said continuous length of article and a cooling pipe, said vulcanizing pipe, tubular cleaner and cooling pipe being connected together in the cited sequence, without a provision of any spacious separating means or sealing means therebetween, in an arrangement in which a mutual ingression between the heating liquid and cleaning and/or cooling medium can be prevented from and in which the economy can be improved in cost as well as in space while ensuring safety.

Vulcanization apparatus for a continuous length of article of rubber,

Growing community of inventors

Ichihara, Japan

Akira Nogami