B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
18/125, 154/18.5
B29D 30/32 (2006.01)
Patent
CA 1133669
Abstract A tire building apparatus is provided having an improved mechanism for turning up the plies of the tire carcass and wrapping them around each tire bead ring. The mechanism is designed so that it can also be used to apply the sidewall pads to the expanded carcass of a radial tire. The improved mechanism includes a bladder that has a molded conical portion in its outer wall portion adjacent the building drum. This conical portion extends very close to the bead ring positioned adjacent the carcass at the sides of the drum shoulders. The improved mechanism also includes a control ring insert placed inside said bladder and radially inwardly from the conical portion of the outer bladder wall portion. When the bladder is inflated to wrap the carcass plies around the bead ring, the control ring insert and the molded conical portion of the outer bladder wall portion combine to provide an improved, tighter wrapping of the carcass plies around the bead ring. They also provide a smoother, more accurate positioning of a sidewall pad to an expanded radial tire carcass when the mechanism is employed for that purpose.
327838
Brown Robert L.
Dunaway Kenneth W.
Henley Virgil E.
General Tire & Rubber Company (the)
Smart & Biggar
LandOfFree
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