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    • 3. 发明专利
    • CORREA TRAPEZOIDAL
    • ES288398U
    • 1985-12-16
    • ES288398
    • 1985-07-29
    • INDUSTRIE PIRELLI, S.P.A.
    • F16G5/06F16G5/20
    • Correa trapezoidal, que comprende un cuerpo de material polímero flexible, una pluralidad de insertos resistentes y longitudinales, paralelos entre si sobre un anillo concéntrico con la correa y orientados según la dirección longitudinal de la misma, estando una porción del cuerpo delimitada por flancos aptos para contactar con superficies correspondientes de la garganta de una polea en una transmisión, correa caracterizada por el hecho de que al menos porción del cuerpo comprende una pluralidad de estratos da uno de ellos con fibras orientadas en una sola dirección, estando los estratos superpuestos alternativamente, con las fibras orientadas substancialmente en dirección longitudinal y los otros en dirección substancialmente transversal, siendo el espesor de cada estrato menor o a lo una igual a la longitud media de las fibras presentes en el estrato.
    • 9. 发明专利
    • DE1778325C3
    • 1980-07-03
    • DE1778325
    • 1968-04-19
    • INDUSTRIE PIRELLI S.P.A., MAILAND (ITALIEN)
    • LANFRANCONI, GIAN MARIO, TREZZO D' ADDA, MAILAND (ITALIEN)
    • B29C47/02B29C48/34H01B13/14H01B13/30
    • 1,194,473. Extruding cable sheaths. PIRELLI S.p.A. 28 Feb., 1968 [24 April, 1967], No. 9555/68. Heading B3P. [Also in Divisions H1, and B4-B5] Apparatus for sheathing liquid (e.g. oil) impregnated electric cables with, e.g. lead or aluminium comprises extrusion means including an inner die member 10 having a bore lined by a metal tube 12 which is surrounded by a thermally insulating material 13 extending from the extruding opening of the duct 11 to a thermally insulated packing ring 17. The ring 17 is axially compressed against an annular shoulder 16 at an intermediate portion in the bore of the inner die member to provide a fluid-tight seal between the internal surface of the bore and the cable to be sheathed by the action of a slidable metal sleeve 18. This action is effected by a threaded ring 22 screwed against spring washers 20 which engage an annular ridge 21 on the sleeve 18 to press it against a flange 14 on the tube 12. The sleeve 18 is spaced from tube 12 by a thermally insulating layer 19. The packing ring 17 is constituted by an annular asbestos layer interposed between two copper rings. A cooling tube 6 is included which is held against the extruder head 7 by a screw-threaded clamping ring 9, a sealing gasket 8 being interposed between head 7 and tube 6. The sheath may be cooled by spraying with water under external pressure or vacuum conditions or at atmospheric pressure.