Claims
- 1. Apparatus for manufacturing a cylindrical sleeve-shaped tire carcass comprising at least one carcass ply provided with reinforcing cords having respective ends each folded back around at least one circumferentially inextensible bead wire and a tire sidewall fixed on each side portion of said sleeve, said apparatus comprising an assembly drum (12), rotating around its own axis, having a radially contractable, radially external cylindrical revolution surface, connected to two axially opposed external side surfaces through two curvilinear surfaces, means for turning down and folding back the ends of said plies on said side surfaces and means for setting bead wires against said side surfaces, said apparatus further comprising aside of each drum (12) end:
- at least one tubular element (17), comprising a tubular part having a diameter not greater than the drum (12) diameter, coaxial with said drum, open as a funnel at one end, and made of a material extensible in a circumferential direction and inextensible in an axial direction,
- at least one annular flange, coaxial with the drum (12), having an internal diameter greater than the diameter of said drum, rotatably connected to the drum and axially movable in both directions with respect thereto, said annular flange being connected to the funnel-shaped end of said element, and
- means for axially moving said flanges.
- 2. Apparatus according to claim 1, it comprising, for each end of said drum, a couple (17, 18) of said tubular elements, each connected to a corresponding annular flange (19, 20).
- 3. Apparatus according to claim 2, wherein each element, having a funnel-shaped tubular form and unbroken surface, is made of a releasing material.
- 4. Apparatus according to claim 3, wherein said releasing material is a silicone-based rubber composition.
- 5. Apparatus according to claim 3, wherein said tubular elements comprise reinforcing means of releasing material arranged on at least one surface of said tubular elements.
- 6. Apparatus according to claim 3, wherein said tubular elements incorporate reinforcing means arranged in such a manner as to provide said extensibility in a circumferential direction and inextensibility in an axial direction.
- 7. Apparatus according to claim 6, wherein said element is made of a rubberized fabric cylinder reinforced with threads selected from the group comprising monofilaments, elementary threads and reinforcing cords, either textile or metallic, arranged in a mutually parallel manner according to the generating line of said cylinder.
- 8. Apparatus according to claim 6, wherein said element is made of a rubber tube incorporating reinforcing fibers selected from the group comprising axially-oriented textile, metallic or glass fibers.
Priority Claims (1)
Number |
Date |
Country |
Kind |
MI96A1650 |
Jul 1996 |
ITX |
|
Parent Case Info
This is a division of application No. 08/899,267, filed Jul. 23, 1997, now U.S. Pat. No. 5,851,329.
US Referenced Citations (6)
Foreign Referenced Citations (5)
Number |
Date |
Country |
8810782 |
Mar 1983 |
AUX |
340146 |
Nov 1989 |
EPX |
613767 |
Sep 1994 |
EPX |
2376762 |
Aug 1978 |
FRX |
2195959 |
Apr 1988 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
899267 |
Jul 1997 |
|