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0 THE BANDAG PROCESS The Bandag retreading process is basically a six -step operation.which takes a retreadable, used tire or casing, inspects and repairs it, buffs it, applies pre cured tread design to the casing, and cures that tread to the casing within a sealed pressurized curing chamber at 2100F. After ure, the tire is removed from the chamber and final inspected, eventually being placed into service at the end -user level. The following is a brief synopsis of the major operations in the Bandag process: 1. Inspection All tires received, and being considered for retreading, are inspected on an inspection spreader. The tire is examined to insure it is acceptable for retreading. The inspection process looks for possible punctures, ruptured cords, tire separations and other tire damage which would not allow the tire to be processed properly within the Bandag system. As necessary, the tire is repaired during the inspection operation. 2. Buffin Tires that pass inspection and are accepted for retreading are first buffed to remove any of the old tread remaining on the tire. These tires are buffed on the Bandag Buffer. The old tread is removed from the tire utilizing a rasp hub equipped with metal blades. These blades physically cut and remove the oxidized tread from the tire in the form of a small rubber chip. To minimize pollution of the atmosphere in the shop and outside of the shop, and to maintain as clean and cool a buff surface on the tire as possible, a pollution control system is attached to the buffer. This system consists of a high -efficiency cyclone which removes the ruffed rubber dust or chip from the tire at the point of removal (the rasp touching the tire). During this buffing operation, a fine spray of water is applied to the surface of the tire to keep tire temperature down to a minimum and to allow the blades to remove the oxidized rubber with as little effort as possible. This dust or rubber chip is then conveyed to a dust collector at the rate of approximately 5,700 feet per minute with a volume of 2,000 CFM. This dust collector holds the removed rubber in an air -tight hopper until such time as it is removed from the hopper and placed into a dumpster for proper disposal.