Forming a tire bead assembly

Details Forming a tire bead assembly Forming a tire bead assembly

B - Operations, Transporting

29

D

154/14

B29D 30/48 (2006.01)

Patent

CA 1106741

FORMING A TIRE BEAD ASSEMBLY Abstract of the Disclosure A tire bead assembly of a bead core, apex and gum tie strip is made by laying the gum tie strip about a non-inflatable annular member of triangular cross-section and across the slant surface of the member. The apex is wrapped then about the tie strip and about the slant surface of an annular inflatable bag. After the core is pressed coaxially on the tie strip so as to indent the member and thus preform the tie strip, the bag is inflated to turn the apex and underlying the strip about the core and against an annular forming member to shape the assembly suitably for the tire carcass in which it is to be inserted. A bladder is then inflated to wrap the tie strip on the second side of the core and apex. The member bridges the gap between the adjacent edges of the bag and the bladder. An apparatus for carrying out the steps is also described. The resulting bead assembly is tightly cohered and free of wrinkles and air pockets.

312327

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