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:
Jun. 20, 1995
Filed:
Jun. 16, 1993
Yasunori Yoshie, Tokyo, JP;
Takashi Tsukui, Tokyo, JP;
NKK Corporation, Tokyo, JP;
Abstract
An apparatus for manufacturing a metal tube covered optical fiber cable, including an assembly (2) having a plurality of roller pairs, for causing both side edges of a metal strip (1) to abut against each other to form the metal strip into a metal tube, a laser welding device (7) for radiating a laser beam to abutment portions of the metal tube to bond the abutment portions to obtain a sealed metal tube (1c), and an optical fiber guiding element (6) for guiding an optical fiber (5) in a formed metal tube (1a) comprises an extra length control system comprising a tension adjusting element (15) for the metal strip (1) arranged in the upstream of the assembly (2) and a tension adjusting element (14) for the optical fiber (5) arranged in the upstream of the optical fiber guide element (6), and a traction element (11, 13) including tension variable element (11) for the metal tube covered optical fiber cable (1d).