Title: Method and apparatus for extruding a layer of extrudable material on a body having inaccessible ends

Abstract: Method and apparatus for replacing a portion of the insulating sheath of a submarine electric cable when the ends are inaccessible in which a split extrusion mold is placed around the cable and secured to the head of an extruder which is mounted on a carriage movable axially of the cable. The cable is held in a fixed position and as new insulating material is injected into the mold and extruded over the portion of the cable from which the old insulation has been removed, the carriage is moved at a rate dependent upon the extrusion rate. The interior of the mold may be subjected to vacuum. Alternatively, the mold may be held stationary and the cable moved axially thereof.

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Inventors: Priaroggia, Paolo Gazzana (Milan, IT)

Application Number: 433236
Filing Date: 1974-01-14
Publication_date: 1976-02-24
Assignee: Industrie Pirelli S.p.A. (Milan, IT)
Primary Class(es): 156/49 156/51, 156/94, 156/244.12, 156/244.13, 156/500, 264/36.19, 264/171.14, 425/13, 425/113
Other Classes:
US Patent Ref:

2287163	Jun, 1942	Bishop	156/49.
2563829	Aug, 1951	Fitzgerald et al.	156/49.
2587930	Mar, 1952	Uschmann	156/500.
2605202	Jul, 1952	Reynolds	156/244.
2767431	Oct, 1956	DeLaubarede	156/244.
2981649	Apr, 1961	Metcal, Jr.	156/49.
3368006	Feb, 1968	Gill	425/13.
3503823	Mar, 1970	Richart et al.	156/244.
3559241	Feb, 1971	Chu	425/113.
3564661	Feb, 1971	Atwell	425/113.
3737261	Jun, 1973	Hardesty	425/113.

Other Refs:
Primary Examiner: Van Horn, Charles E.
Assistant Examiner: Lewris, Basil J.
Attorney: Brooks Haidt Haffner & Delahunty