N.v. Raychem S.a.

Raychem Limited

Jos Doucet

Jan L Vansant

Joris R Franckx

Jean-Marie E Nolf

Noel M Overbergh

Valere Buekers

Luiz Neves Mendes

Robert L Hall

Hubert Genbrugge

This invention provides an enclosure for a butt splice of optical fibre cables which includes organizer trays for storing the excess lengths of individual optical fibers. The enclosure and trays provide for access to the individual fibers for splicing or repair.

Electrofit fibre optics butt splice

This invention provides an enclosure for a butt splice of optical fibre cables which includes organizer trays for storing the excess lengths of individual optical fibres. The enclosure and trays provide for access to the individual fibres for splicing or repair.

A seal between an object such as a cable, cable splice or branch-off, and a surface such as a recoverable sleeve by means of a flexible envelope containing a void-filling composition. The void-filling composition undergoes a change from a low viscosity on installation, which allows the flexible envelope to conform to the object, to a high viscosity after installation, which gives mechanical strength to the seal. Deformation of the flexible envelope on installation may be brought about by installation of the recoverable sleeve or other surrounding surface.

Flexible envelope seal and sealing method

A technique for protecting an optical fibre breakout particularly from a cable 1 comprising a core 2, a plurality of loose fibres 3 and a jacket 5. The jacket 5 and core 2 are stripped back and the fibres encased in protective tubes 7. This may be done one fibre at a time by removing a portion of cable jacket remote from the end and withdrawing each fibre from under the remaining end portion of jacket. The cable may be held in a holding tool and the fibres inserted into their protective tubes by means of an insertion tool.

Optical fibre breakout

A dimensionally heat recoverable article carrying a thermoplastic polymeric material and a heat-softenable adhesive of smaller thickness and lower softening or melting point than the polymeric material is used to encapsulate objects such as joints in cables. The heat-softenable adhesive allows low installation temperature while the polymeric material allows excellent cycling performance to be maintained. The article may be in the form of a wrap-around sleeve.

Dimensionally heat recoverable article

A hot-melt adhesive composition comprising a polyamide and up to 10% by weight of the polyamide of an ethylene acrylic terpolymer and preferably also an acrylic rubber. The acrylic rubber is preferably a copolymer of ethyl acrylate, butyl acrylate, methoxy ethyl acrylate and ethoxy ethyl acrylate.

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Kessel-lo, Belgium

Jos Doucet