Abstract: An improved tire section repair unit for the repair of a damaged section of a tire. The repair unit includes two curved side walls pivotally connected to the base of the unit. A locking arm is provided that securely encloses the entire system of curved walls, base and internal air bag and heat pad arrangement situated about the tire under repair. The pivotable side wall design permits the repair of tires of varying sizes. A locking arm arrangement permits the use of lightweight side walls to enclose the system. As a result, the repair unit of the present invention is more transportable and less cumbersome to use.

Abstract: An expandable annular envelope sealing device for manually sealing a curing envelope between an outer annular portion and the bead of a tire to be retreaded in an autoclave. This envelope sealing device includes two opposed, expandable semicircular half-rings and either a toggle-actuated sealing lever or, preferably, a turnbuckle sealing lever for fine tuning adjustment of the expansion of the half-rings.