Abstract: A power feeder for solenoid valves has a printed wiring board carrying a printed feeder circuitry firmly supported on a manifold base. Thus, electrical connection between the solenoid valves and printed wiring board is accomplished simultaneously with the fastening of the solenoid valves to the manifold base. U-shaped brackets having a width corresponding to the width of each solenoid valve are attached to rails provided on one side of the manifold base by fitting engaging shoes provided on one side wall of the brackets over the rails. The printed wiring board is placed on the side walls of the brackets, while the feeding terminal of a terminal box at one end of the connected brackets is connected to the receiving terminal of the printed wiring board by means of a cable connector passed through the brackets.

Abstract: A color exchange and cleaning device of a minibell painting machine has two systems or sections, that is, a bell-side (first) color exchange and cleaning section and a counter-side (second) color exchange and cleaning section, and includes a manifold provided with a bell-side conduit and a counter-side conduit. The bell-side conduit is communicated with a trigger dump valve for the bell-side color exchange and cleaning section and a trigger valve for the counter-side color exchange and cleaning section. The counter-side conduit is connected via a connection hose with the trigger dump valve for the bell-side color exchange and cleaning section. The trigger valve for the counter-side color exchange and cleaning section is connected with a dump valve. The counter-side conduit is provided with a plurality of color valves, a low-pressure thinner valve and a low-pressure air valve. Thus, a manifold for the bell-side color exchange and cleaning section is eliminated, and the connection hose is made short.

Abstract: A method of operating an air-supplied type coating booth in which conditioned air supplied from an air supply blower is enforced downwardly to the inside of a tunnel-shaped coating booth and the air in the coating booth is drawn together with paint mists and the likes down to the beneath of a booth floor by way of an air exhaust blower comprises the steps of detecting the flow velocity of air streams flowing into or out of inlet and the exit of the coating booth, applying primary and secondary averaging processings for signals for averaging variations caused by external disturbances fluctuating at relatively shorter and longer periods of time, judging the thus averaged direction and the flow velocity of the air streams at the inlet and the exit, variably controlling the flow rate of exhaust from the exhaust blower in accordance with the direction and the flow velocity.

Abstract: A method of operating an air-supplied type coating booth in which conditioned air is enforced from an air supply blower downwardly to the inside of a coating booth and then discharged to the beneath of the booth floor by an exhaust blower, in which the booth operation is stopped after memorizing the balanced flow rates for the supply blower and the exhaust blowers kept just before the completion of the booth operation, and the supply blower and the exhaust blower are automatically set to the above-mentioned balanced flow rates respectively upon re-starting the booth operation again. Balanced and stable booth operation where no air streams flow into or out of the inlet and the exit can be attained rapidly at the start of the booth operation.

Abstract: A method of operating an air-supplied type coating booth adapted to enforce conditioned air by an air supply blower through a filter downwardly to the inside of a tunnel-shaped coating booth at a predetermined flow velocity and then drawn to discharge together with coating mists, etc. to the beneath of the floor comprises the step of detecting the flow velocity of conditioned air flowing through the filter to the inside of continuously, applying primary and secondary averaging processings for the detected signals containing variations fluctuating at relatively shorter and longer periods respectively, comparing the value obtained from the signals applied with the secondary averaging processing with a predetermined flow velocity value and variably controlling the flow rate of the air supplied from the air supply blower depending on the deviation and thereby maintaining the flow velocity of the conditioned air flowing to the inside of the coating booth always constant.

Abstract: A method of heating a drying furnace for use in hot air-circulating type coating drying in which a hot air is supplied, under circulation, to the inside of the furnace thereby heating and drying coated articles, wherein heating for the furnace is conducted through a direct heating type hot air-circulating path in which the air inside of the furnace sucked from a return duct is heated directly by a combustion gas from a burner and supplied under circulation from a supply duct again to the inside of the furnace while conducting a step of increasing the temperature by pre-heating the inside of the furnace, whereas heating for the furnace is conducted through an indirect heating type hot air circulating path in which the air inside of the furnace sucked from the return duct is heated in a heat exchanger and then supplied, under circulation, through the supply duct again to the inside of the furnace while conducting a coating drying step when the temperature inside of the furnace reaches a predetermined temperatur

Abstract: In a change-over valve, a valve member consists of a poppet type closure member. A pair of supporting rods are connected to the opposite end portions of the closure member. Guide members made of synthetic resin are connected to the opposite end portions of the supporting rods in order to guide the valve member upon changing over in the directions of fluid flow passages. The guide members prevent the closure member of the valve member from inclined and unstable seating against the valve seats.