Plastic and nonmetallic article shaping or treating: processes – Miscellaneous
Reexamination Certificate
2003-10-31
2010-10-05
Michener, Jennifer K (Department: 1795)
Plastic and nonmetallic article shaping or treating: processes
Miscellaneous
C427S118000, C264S040300, C264S171130, C264S171140, C425S130000, C239S304000
Reexamination Certificate
active
07807091
ABSTRACT:
A method and plant for the introduction of a liquid into a molten mass under pressure. Such a method and plant are particularly, but not exclusively, suitable for the formation of a coating layer on a cable element having at least one conductor, the layer having an extruded thermoplastic polymer forming a continuous phase incorporating a dielectric liquid, and are useful, for example, in the production of an electric cable for the transportation and/or distribution of electrical power. The method includes the steps of bringing the liquid to a predetermined pressure greater than the pressure of the molten mass; feeding the liquid into a plurality of storage tanks, and injecting the liquid into the molten mass at an injection pressure equal to the above-mentioned predetermined pressure by means of a plurality of injectors in respective fluid communication with the plurality of storage tanks. Advantageously, this allows a substantial continuity of delivery of the liquid in a technologically simple way and at low cost, while ensuring a dispersion as uniform as possible of the liquid within the molten mass.
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Office Action issued on Jul. 3, 2009 by the Japan Patent Office in corresponding Japanese Patent Application No. 2005-510125.
English language translation of Office Action issued on Jul. 3, 2009 by the Japan Patent Office in corresponding Japanese Patent Application No. 2005-510125.
Balconi Luca
Bareggi Alberto
Belli Sergio
Dell'Anna Gaia
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Michener Jennifer K
Prysmian Cavi e Sistemi Energia S.r.l.
Slawski Magali P
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