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f BANDAG, INCORPORATED - BANDAG CENTER - MUSCATINE, IOWA 52761-5886 - 319/262-1400 Leading the retread industry worldwide August, 1986 The Bandag method of retreading -tires differs greatly from the conventional hot cap retreading of several years ago. In the Bandag method of retreading, tires are received at the'Bandag Dealer, thoroughly inspected and repaired as necessary for processing. Tires are buffed on a Bandag Buffer. To remove the remaining tread from the tire, metal blades are used in conjunction with a pollution control/dust collection system. The pollution control system sprays water during the buffing operation to reduce a cetemphefficiency cyclonewhereit isstoredin rature eesmoke. The buffed rubber particles are then conveyed y 8 hopper until such time as the hopper is emptied. ire is in a After buffing, smaller imsuineconstruction and performanceare skived out by hand. htotall OSHAeregulations. spray booth which conform Next, filling of skive injuries is performed using the repair gum extruder. A precured tread is then applied to the prepared casing, either the shorty spreader and stitcher, or a semi -automatic tread builder. The tire is enveloped, rimmed and flanged, and placed in t$taalmaximumsed hot air temperaturecofing 2i0chamber degreesfor a Fahrenheit� of three hours and +0 minutes This curing bonds the tread to the casing. Final inspection is accomplished after curing prior to the tire being placed into service. At no time during the Bandag process is the tire subjected to extreme heat or extreme air pressure. Steam, electrical, or oil fired boilers are not used. Flammable materials are kept to a minimum within the shop. Exhausting of flammable vapors in the cement booth is accomplished through use of the cement booth, which is vented to the outside. The dust collector, when properly calibrated and maintained, has an efficiency of collection of 99.9%. This equipment is used in over 540 Bandag Franchise Dealer locations within the United States. This equipment meets all building or municipal code/regulations.