# US 2014/0193539 A1 · Device for fiber excess length stable control in optical cable loose tube

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- Number: US 2014/0193539 A1
- Document ID: US20140193539A1
- Status: Published application
- Kind: A1
- Application number: 14/085,059
- Filed: 2013-11-20
- Published: 2014-07-10
- Earliest claimed: 2013-01-05
- Assignees: Yangzhou Jinsen Optoelectronics Co., Ltd.
- Applicants: Yangzhou Jinsen Optoelectronics Co., Ltd.
- Inventors: Zhaoshun LI; Jun WANG
- Web page: https://patentgrep.com/patent/US20140193539A1

## CPC

- B29C 48/355: Conveyors for extruded articles
- B29C 48/06: Rod-shaped
- B29C 48/09: Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C 48/885: External treatment, e.g. by using air rings for cooling tubular films
- B29C 48/9115: {of hollow articles}
- B29C 48/912: {of tubular films}
- B29C 48/919: {using a bath, e.g. extruding into an open bath to coagulate or cool the material}
- G02B 6/4484: {with desired surplus length between fibres and protection features}
- B29C 48/0018: {combined with shaping by orienting, stretching or shrinking, e.g. film blowing (B29C48/0017 takes precedence)}
- B29C 48/05: Filamentary, e.g. strands
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

The present invention relates to a device for fiber excess length stable control in an optical cable loose tube, which is disposed between a loose tube extruder and a loose tube tractor. The device forms the following structures: an extrusion section connected to the extruder, a traction section connected to the tractor, and a transition section connecting the extrusion section and the traction section, where loose tube displacement generated at the extrusion section is greater than loose tube displacement generated at the traction section. The present invention provides a device for fiber excess length stable control in optical cable loose tube with a simple structure and an excellent excess length control effect.

## Claims

### Claim 1

A device for fiber excess length stable control in an optical cable loose tube, disposed between a loose tube extruder and a loose tube tractor, wherein the device forms the following structures: an extrusion section connected to the extruder, a traction section connected to the tractor, and a transition section connecting the extrusion section and the traction section, loose tube displacement generated at the extrusion section being greater than loose tube displacement generated at the traction section.

### Claim 2 (depends on 1)

The device for fiber excess length stable control in an optical cable loose tube according to claim 1, wherein the device has a structure of an inverted-conical taper roller.

### Claim 3 (depends on 2)

The device for fiber excess length stable control in an optical cable loose tube according to claim 2, wherein the loose tube is wound around the taper roller at least three times from top down.