Cassette for coiling optical fibers

• US 20040120679A1
• Filed: 02/21/2003
• Published: 06/24/2004
• Est. Priority Date: 02/25/2002
• Status: Active Grant

• Current Assignee: Nexans Incorporated (Nokia Corporation)
• Original Assignee: Nexans Incorporated (Nokia Corporation)
• Inventors: Biaud, Richard, Vincent, Alain
• Granted Patent: US 6,934,457 B2
• Time in Patent Office: Days
• US Class Current: 385/135
• CPC Class Codes: G02B 6/4455 characterised by the way of extraction or insertion of the cassette in the distribution frame, e.g. pivoting, sliding, rotating or gliding
• CPC Class Codes: G02B 6/4457 Bobbins; Reels

Abstract

The present invention provides a cassette for coiling at least one optical fiber provided with a splice protection, in which said optical fiber is to be wound in such a manner as to fit closely against an inside peripheral wall of said cassette, said cassette being provided with two entry points in the vicinity of said inside peripheral wall to enable two portions of said optical fiber situated on either side of said splice protection to penetrate into said cassette. According to the invention, said entry points are provided with guide means so that said two portions wind in the same direction, and said splice protection takes up a non-predetermined position in said cassette. The present invention is more particularly adapted to coiling a flat optical fiber ribbon having a splice.

Claims

1. / A cassette for coiling at least one optical fiber provided with a splice and protection for the splice, in which said optical fiber is to be wound in such a manner as to fit closely against an inside peripheral wall of said cassette, said cassette being provided with two entry points in the vicinity of said inside peripheral wall to enable two portions of said optical fiber situated on either side of said splice protection to penetrate into said cassette, wherein said entry points are provided with guide means so that said two portions wind in the same direction, and said splice protection takes up a non-predetermined position inside said cassette.

2. / A cassette according to claim 1, wherein said two entry points coincide.

3. / A cassette according to claim 2, for mounting in an organizer for superposable cassettes, said cassette having a flexible arm for pivoting relative to said organizer between a closed position and an open position, said arm enabling said fiber to be conveyed between the organizer and said entry point of said cassette, the length of the guide path for said fiber between said closed and open positions remaining constant.

4. / A cassette according to claim 1 for containing a fiber presenting a reversal of direction giving the fiber an S-shape, the cassette being wherein said cassette includes locking means for locking said fiber in such a manner as to maintain its S-shape.

5. / A cassette according to claim 4, wherein said locking means are at the center of said cassette.

6. / A cassette according to claim 1, including holding means for holding said fiber, said holding means being disposed close to said inside peripheral wall so as to limit movement in translation of said fiber parallel to said inside peripheral wall.

7. / A cassette according to claim 1, wherein said inside peripheral wall is substantially circular in shape.

8. / A cassette according to claim 1 for use with a fiber such that said two fiber portions are of lengths starting from their entry points into said cassette that are sufficiently different to ensure that the splice protection is not at the center of said cassette.

9. / A cassette according to claim 7, for use with a fiber such that said two fiber portions have lengths starting from their entry points that differ by not less than π

×

D/2, where D designates the diameter of said peripheral wall.