The Goodyear & Tire Rubber Company

John R Thiele

Max D Brinkley

Richard J Olsen

Donald E Baker

Gary L Bowen

Charles J McEvoy

Stokes R Dodson, Jr

Walter H Rudder

William D Braden, Deceased

Allen L Livgren

Upper and lower rollers have grooves for a bead ring having a clamp area portion produced by a bead winding machine. The bead ring is placed in the groove of the lower roller with the beginning of the clamp area portion in position for pressing by lowering of the upper roller so that the bead ring is engaged by the groove in the upper roller. The rollers are oscillated between the pressing position at the beginning of the clamp area and the end of the clamp area to roll the top, bottom and sides of the clamp area portion during the movement of the bead ring. The pressure on the bead ring is released by raising the upper roller at the initial pressing position at the beginning of the clamp area so that the bead ring may be removed with the same orientation it had when it was placed in the groove.

Method for rolling bead rings

Apparatus for rolling bead rings

The production of a very large tire by expanding the uncured unrestrained carcass of the tire to engage its crown region with the radially inward surface of a rigid circumferentially continuous centering ring. The ring and the uncured carcass together are transported from the carcass expanding location to the tire curing mold which is adapted to receive and locate the ring and carcass together so as to prevent the mid-circumferential region of the carcass from shifting out of symmetry with the mold. The ring forms a part of the mold for molding and curing the tire carcass. The inward surface of the ring is provided with a pattern of grooves and ridges; the method and apparatus disclosed are particularly useful in the manufacture of a cured tire carcass adapted to combine with an endless tread assembly cured apart from and independently of the tire carcass to make the complete tire. The foregoing abstract is not to be taken as limiting the invention of this application, and in order to understand the full nature and extent of the technical disclosure of this application, reference must be made to the accompanying drawing and the following detailed description.

Centering a tire in a mold

A first stage radial ply carcass and an endless breaker belt are built conventionally about horizontal axes. Carcass and belt separately are upended, to axis-vertical positions. The respective mid-circumferential planes of the carcass and the belt are made coplanar and coincident about the vertical axis of a shaping and curing core, without fixed reference to the vertical axis. The core is raised, into and through the carcass and expanded, first to support the carcass without significant radial deformation due to gravity, and then to expand the carcass to adhere the belt therearound. The assembly of core and belted carcass is then returned to horizontal orientation to receive tread therearound. The tire is cured conventionally while the shaping core remains in the tire, still inflated, preferably with an inert gas.

Tire building apparatus for large tires

Growing community of inventors

Topeka, KS, United States of America

John R Thiele