Apparatus for the application of a single strip tread to a carcass

Abstract

Abstract An apparatus for applying an endless single strip tread to the carcass of a tire in either toroidal or flat built unshaped form. An uncured rubber strip of tread material is applied to the tire carcass in substantially parallel, spaces, spiral convolutions by moving a movable conveyor assembly and the supply source for the tread material in a direction parallel to the axis of the tire carcass itself. The movement is in one direction only during application of the strip, and a constant step-off of the strip as it is applied to the tire carcass is obtained by control means which permit the speed of transverse travel of the conveyor assembly and the rotational speed of the tire carcass to be controlled according to a predetermined formula so that the tread is applied to the tire in a single pass of the movable conveyor and tread stock supply source. The apparatus also includes means for returning the conveyor assembly to its starting position automatically following completion of application of the strip to the tire. The apparatus also includes provision of a hump stock let-off device which can be utilized when a "valley" type tread contour is required. A stitcher is also utilized to stitch down the tread stock during the time that the device moves relatively of the tire body, and finally the method and apparatus is utilizable with any conventional tire-building machine or recapping machine, since the method and apparatus disclosed herein is utilizable either in applying a tread to a new tire carcass or in retreading a used tire.

Inventors

• 👤 L Symons

Bibliographic Details