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B & J POLLUTION CONTROL GENERAL INFORMATION After 21/2 years of extensive development, B & J has devised a pollution control system for use in the retreading industry. While other approaches problem after it was created, the B & J Pollution C nttrol Sysm eliimin tes t a the the source. Tires can be buffed on all existing buffers without creating smoke. This is done by controlling, through electronics, the application of water to the blades in the rasp, which has a neutralizing effect on the friction factor. The blades can cut through rubber more freely, without the friction, smoke or fine powdered dust experienced with dry buffing. There are many side benefits, which include extended rasp life; cleaner air in the buffing room; improved adhesion as there is no breakdown in rubber chemistry; extended motor life as there is less draw on the motor, also the cool rasp draws heat from the rnotor shaft; complete elimination of the fire hazard as material being removed does not contain any heat, but is cold and coarser'than the fine powdered dust obtained through dry buffing. The principle of the B & J Pollution Control is that the buffing motor, through an electronic sensing device in the control unit, activates the valve controls and applies to the rasp the necessary amount of water, depending on depth of cut and amount of rubber being removed. This reduces the friction -level to the point where the oils within the rubber are not converted into a vapor, commonly observed as blue smoke. The entire unit is completely automatic: when the buffer motor is started, the system is turned on automatically, however there is no application of water until the rasp contacts the tire, at which time the sensing device determines the proper Pmount to be applied; when the rasp leaves the tire, the water is shut off automatically by this same electronic control. The amount of water used is insignificant: approximately 1 pt. for a passenger tire and 1 qt. for a large truck tire. This would amount to 400 to 600 gal, per month, using one heavy machine for an 8-hour shift each day. At the cast of water in Los Angeles, this would be about tic per month. The electrical requirerr, nts are minimal also: operating 8 hours a day, 5 days a week, for one month, would utilize power equivalent to one 40W bulb operating 60 hours. When applied to Los Angeles, at 9 MiVKWH, this would be about 2c per month. This unit is designed to operate trouble -free. This system buffed over 1,000,000 tires during the first 1'/2- years in the field and has been favorably accepted by various Pollution Control Boards. It not only eliminates the source of air pollution in tire buffing and provides higher quality, but increases profits through substantial savings in operating costs. This cannot be said of any other system available, as maintenance and replacement costs of cloth, fiberglass, or absolute filters are high and are not completely satisfactory. It has not been necessary that any other filtering equipment be used with this system other than proper dust collecting and air handling equipment, which is covered separately. I #HO/014-82