The Furukawa Electric Co., Ltd.

Mitsui Wood Systems, Inc.

Masahiro Hirao

Kazuhiro Kurihara

Takashi Shigematsu

Yasushi Kihara

Jun Yamakawa

Kiyohisa Kitagawa

Yoshimi Iwamoto

A manufacturing apparatus for multi-fiber optical ferrule includes a spacer whose hardness is equivalent to or higher than the hardness of pins for forming fiber holes. Further, corner portions with respect to the arrangement direction of the pins for forming fiber holes of the spacer are formed as inclined surfaces or rounded surfaces.

Manufacturing apparatus for producing a multi-fiber optical ferrule

In a prior art multiple-fiber optical connector, it was difficult to easily and securely insert and mount a plurality of optical fibers led out from the multiple-fiber optical fiber ribbon. Further, in such a prior art multiple-fiber optical connector, it was not possible to prevent a transmission loss from being generated due to local deformation of optical fibers, which is produced in mounting optical fibers, and a connection loss from being generated due to hardening and contraction of an adhesive agent, which are in the final assembling process. In order to solve such problems, a structure of an optical connector was designed as shown below; That is, a tapered portion ( ) is provided in a fiber ribbon insertion hole ( ) in order to narrow the width thereof, and the tip end ( ) of a sheathed portion of a multiple-fiber optical fiber ribbon ( ) is engaged in and stopped in the intermediate portion ( ) of the tapered portion ( ), whereby the insertion position is determined. In addition, in order to guide the led out optical fiber ( ) continuously from the tapered portion ( ), a conical introducing portion ( ) having an adequate diameter is provided, and it becomes possible to collectively insert a plurality of optical fibers securely into appointed minute holes for inserting optical fibers. Furthermore, no insertion window for an adhesive agent is necessary.

Multiple-fiber optical connector, and method for assembling the same

A method of compression-molding a slurry of a hydraulic inorganic material such as cement or slag, a light-weight aggregate, a reinforced fiber material and other filler material kneaded with water so as to manufacture an inorganic molded product. The slurry is put into a molding frame having a filtering cloth placed over the bottom surface thereof and is then compression-molded in the molding frame by using a molding die while it is suction-dehydrated from on both sides of the molding die surface and the filtering cloth surface. The molding die has a number of vent holes for sucking-dehydration each of which vent holes comprises a small-diameter hole and a large-diameter hole continuous therewith.

Method of manufacturing an inorganic molded product

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Tokyo, Japan

Masahiro Hirao