Sumitomo Electric Industries, Limited

Takehiko Okada

Shigeru Suemori

Yasushi Ito

Kazuhiro Hamada

Takashi Tanaka

Masakazu Watanabe

Shigeki Yasui

An apparatus for assembling an optical cable comprises a spacer paying-out portion , a stationary ribbon supply unit , a gathering portion and a taking-up portion . The spacer paying-out portion supplies a spacer having a spiral groove in the surface of a long spacer body from a supply reel while revolving around a line axis X-X. The stationary ribbon supply unit supplies a plurality of optical fiber ribbons . The gathering portion forms the optical fiber ribbons sent out of the stationary ribbon supply unit into a cable core by holding the optical fiber ribbons within the spiral groove of the spacer sent out of the spacer paying-out portion and running forward while rotating on its center axis. The taking-up portion winds the cable core on a taking-up reel while revolving around the line axis. A winding roller ( ) having an rotational direction identical to an rotational direction of the supply reel of the spacer and used for winding the spacer or the cable core is installed adjacently before and after the gathering portion whereby to revolve the winding roller around the line axis in synchronization with the revolution of the spacer paying-out portion . Accordingly, it is possible to prevent a twisting of the spacer in the gathering portion resulting from a winding habit of the spacer during a step of assembling cables.

Apparatus and method for assembling optical cable

The present invention relates to an extrusion coating apparatus having a structure which is capable of correctly forming and applying a coating layer with a desirable cross-sectional form even when thermal distortion occurs in its extrusion unit. This extrusion coating apparatus comprises an extrusion unit extruding a thermoplastic resin while heating the resin, a coating unit providing a coating layer of the thermoplastic resin from the extrusion unit around a linear body pulled at a predetermined tension, and various distortion-absorbing structures absorbing the distortion in the extrusion unit caused by heating the thermoplastic resin.

Extrusion coating apparatus

The present invention relates to an apparatus and method for making a slotted rod for an optical cable, which improves manufacturing efficiency, while alleviating the load applied to the apparatus. In the present invention, a rotatable die for forming a slot in a resin surface covering a tension member is rotated about the moving direction of the tension member such that the rotatable die alternately reverses its rotational direction for every predetermined reverse pitch of the tension member, and the tension member is alternately twisted in rotational directions opposite to the rotational directions of the rotatable die in synchronization with the rotation of the rotatable die.

Apparatus and method for making slotted rod for optical cable

A method and apparatus for stranding tape-shaped optical fibers of the present invention strands a plurality of tape-shaped optical fibers each of which is constituted by a plurality of optical fibers arranged into a tape-shaped unit, wherein powder is applied onto at least one surface of each of said tape-shaped optical fibers in pathlines between supplying devices for supplying said tape-shaped optical fibers and a stranding die of said tape-shaped optical fibers.

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Kanagawa, Japan

Takehiko Okada