Patent ID: 6113737
Filing Date: 2000-09-05
Classification: B29D

Abstract:
A unit for producing a road vehicle radial tire, the unit comprising:a toroidal outer support for housing a carcass having a toroidal inner carcass; the toroidal inner carcass having two lateral walls and two beads; the toroidal outer support and carcass having an inner opening;an inner support which is adapted to support an elastomeric strip having a pair of lateral portions disposed on either side of a central portion that forms an impermeable innerliner;the inner support having a central portion defining first lifting means for raising said innerliner;said first lifting means being gradually deformable radially from a substantially cylindrical undeformed configuration to a deformed configuration capable of mating with an inner surface of the inner carcass to raise said innerliner towards said inner surface and compress the innerliner against the inner surface;said first lifting means including an axially deformable central sleeve;said inner support including first actuating means for varying an axial length of said first lifting means;said first actuating means including a pair of coaxial, counter-rotating central screws, and a pair of first annular plates connected to said central screws by respective screw-nut screw couplings and integral with opposite ends of said central sleeve;said inner support including second lifting means for supporting the lateral portions of said elastomeric strip;said second lifting means including a pair of axially deformable lateral sleeves located on either side of said central sleeve and coaxial with said central sleeve;said inner support including second actuating means for axially compressing said lateral sleeves from a first position to a compressed position;each of the lateral sleeves having a first diameter when in the first position;each of said lateral sleeves pressing a lateral portion of the elastomeric strip against a lateral wall of the toroidal inner carcass when in the compressed position; andeach of the lateral sleeves having a first end that moves toward a stationary second end when the lateral sleeve is in the compressed position; the first end being disposed at the first diameter when the lateral sleeves are in the first position and the compressed position.