Abstract: The problems of excess flow of a liquid to be dispensed in a metering device, especially for a sterilizing liquid for packings and packaging materials, is solved by pumping the liquid from a supply vessel below the housing of the metering device into the latter and maintaining a bath of the liquid in the latter by overflow back to the supply vessel. A control slider lifts a quantity of the liquid from the bath to an overflow channel from which it flows to a metering chamber and then passes through an upwardly inclined duct to the atomizing and blowing device applying the liquid spray to the packaging materials.

Abstract: A bottle for syrups, which affords precise dosages of a syrup in an accurate and hygienically satisfactory manner, comprises a container in bottle form which extends between a bottle bottom and a bottle neck, a cap-type stopper removably associated with the bottle neck, a syringe device having a respectively cylinder associated with the bottle neck and defining a chamber having a set volume equal to a single dose, which chamber is in fluid communication with said bottle bottom through a conduit, and a respectively plunger associated with the cap-type stopper and being movable within said cylinder on removal of the cap to such up a dose from the bottle bottom.

Abstract: In one embodiment, the high viscosity fluid to be metered and dispensed is oil that is pumped at a low flow rate, in the range of one quart per minute. A positive displacement pump obtains the oil from a tank and pumps the oil to an air eliminator. A volumetric meter is downstream of the air eliminator and receives the oil therefrom via a hydraulic system line. An electronic detector/pulser produces signals based upon the flow of oil through the meter. In a working embodiment, 1,000 pulses represent one quart of oil. These pulses are applied to a controller which includes an adjustable calibration circuit that corrects for system characteristics in order to dispense a "legal" quart of oil to a customer. The controller has an input device and a comparator that enables the controller, after being programmed, to dispense, for example, two quarts of oil.

Abstract: A beverage dispensing system has a plurality of dispensing faucets, each of which is supplied with carbonated water (soda) and a selected flavor of syrup. The syrups and soda are chilled upstream of the faucets, and after chilling the soda is introduced into a manifold from which it is distributed to each faucet. In order that a warm beverage will not be dispensed from a faucet as a result of the soda becoming warm downstream from the point of chilling upon the system standing idle for a period of time, soda is withdrawn from the manifold either continuously or periodically to maintain the soda downstream from the chilling point in a cold state.

Abstract: Anti-spill apparatus including a liquid recovery system, for use with a liquid pumping system, which recovers and returns to a liquid container, any liquid which is inadvertently emitted by the liquid pumping system. The apparatus contemplates a pump, having a feeder hose received in a liquid containing barrel, for conveying chemicals and the like contained in the barrel, to a remote location and a new mounting system for mounting the pump on the barrell. The recovery system includes a splash guard which encases a portion of the pump, a recovery hose coupled between a downstream portion of the feeder hose and the splash guard, and a drain spout which receives the liquid from the splash guard and conveys it to the liquid container.

Abstract: A liquid dispenser for selectively dispensing a plurality of different liquids includes a separate reservoir for each of the fluids, and a separate nozzle for dispensing each of the fluids. A separate hydraulic dispensing system having a cylinder containing a piston is connected to each reservoir and nozzle for removing fluid from each reservoir and feed the liquid to the respective nozzle. A single hydraulic operating system including a cylinder containing a piston is connected to each dispensing cylinder to selectively operate the piston in each dispensing cylinder. The piston in the operating cylinder is operated by an electric motor having a threaded shaft, a nut on the threaded shaft and a drive arm on the nut. The drive arm is connected to the piston in the operating cylinder to move the piston a selected distance and thereby dispense a selected amount of liquid from a selected nozzle. Alternatively, the drive arm on the nut can be connected directly to the piston in the dispensing system.

Abstract: A conductive liquid is dosed with a vessel having an upper rim and with a dip tube having a lower end projecting down into the vessel below the rim thereof. The vessel is periodically overfilled with the liquid such that periodically the liquid overflows the rim. Immediately after each overfilling of the vessel, the liquid is aspirated from the vessel through the dip tube until the lower end of the dip tube is above the surface of the liquid in the vessel. The resistance between the dip tube and the liquid in the vessel is continuously monitored and an error signal is generated either when the detected resistance falls below a predetermined threshold corresponding generally to that of the liquid after the overfilling but before the aspirating or when the detected resistance is substantially above the threshold after the aspirating and before the next overfilling. The flow of liquid out of the vessel is impeded except over the rim and through the dip tube at least during the aspirating step.

Abstract: A postmix juice dispensing system for reconstituting and dispensing pliable 5+1 orange juice at freezer temperatures of from about -10.degree. F. to 0.degree. F., including a pressurizable canister for pressurizing concentrate in a flexible bag and for forcing the concentrate through a concentrate conduit into a heat exchanger, then into a metering device and then into a mixing chamber where the concentrate mixes with water fed also through a metering device. The dispensing system includes a remote, under-the-counter refrigeration system with a recirculating water chiller for chilling the concentrate reservoir in the dispenser, a water tank, a pressurizable concentrate canister in the tank, and a potable water heat exchange coil in a cold water bath to cool the potable water to be used in the dispenser.

Abstract: A dispensing system including a tank and a constant displacement pump mounted on the tank for dispensing liquid from the tank. Liquid is withdrawn from the tank via an adapter mounted in the tank bung and having two concentric tubular members, the inner of which receives a tube connected to the pump inlet. A standpipe extends downwardly from the inner tubular member so that liquid is withdrawn from lower portions of the tank. A bypass bore, containing a pressure relief valve, is formed in the pump body between the pump outlet and a recirculation port to return liquid from the pump outlet to the recirculation port when a valve on a delivery line from the pump is closed. The recirculation port is fluidly connected to the outer tubular member of the adapter to return the liquid to the tank.

Abstract: A melter for adhesives such as hot melt adhesives or the like including a high melt zone having high melt heater means for heating the adhesive in the high melt zone to a preselected application temperature, a feed hopper positioned vertically above the high melt zone and a cooling mechanism positioned vertically above the high melt heater means to create a thermal barrier between the high melt heater means and the feed hopper to prevent migration of heat from the high melt zone to the feed hopper. The present invention also relates to a method for preparing adhesives for application including heating the adhesive to a preselected application temperature in a high melt zone and forming a thermal barrier in an area vertically above the high melt zone to limit the upward migration of heat from such zone.

Abstract: Apparatus for intermittently dispensing substantially constant cross sectional thickness beads of molten hot melt material comprising a service block connected to a pressurized source of molten hot melt material, a dispensing gun module, and a return module. Both the dispensing gun module and the return module are mounted upon the service block, the connection being such that the inputs to both modules are received from the service block. Both the dispensing gun module and the return module have valve elements therein operable to open flow through the dispensing gun module and the return module alternatively so that the pressure of adhesive supplied to the dispensing gun module remains constant as hot melt material is dispensed from the dispensing gun module intermittently.

Abstract: A liquid mixing system and method are disclosed for automatically preparing a batch mixture containing predetermined quantities of liquids such as spray dampening solutions or silicone emulsions used in the printing industry. The system comprises a holding tank having one or more liquid columns in liquid communication with the tank so that the level of liquid in the column, or columns, will be the same as the level of the liquid in the tank. Liquid level detection devices preferably in the form of static capacity-type proximity switches sense the level of the liquid in the column, or columns, and liquid charging devices responsive to the liquid level detection devices charges the liquids into the tank in seriatum each time raising the level of the liquid in the tank and in the columns to the next detected level.

Abstract: A soda system for soft drink dispensers which includes an auxiliary tank adapted for maintaining a reservoir of cold soda for immediate dispensing, which soda is also recarbonated in the auxiliary tank. A recirculating pump passes soda from a carbonation unit sequentially to various dispensing stations for a return to the circulating pump. Interposed in the soda path is an auxiliary tank from which the dispensing of soda is actually made. The auxiliary tank communicates with a source of pressurized carbon dioxide to maintain a head of that gas therein for purposes of recarbonating the soda while providing the pressure head for dispensing the soda. Shunt lines are provided in communication with soda dispensing lines to assure that even the soda within the dispensing lines is recirculated and refreshed.

Abstract: An enclosed slurry dispensing system employs a sealed pressurized reservoir for supplying slurry through a bypass chamber to a dispensing nozzle. Excess slurry is bypassed through the bypass chamber to an intermediate chamber. Slurry is allowed to return to the reservoir through a normally-closed check valve, closed by the higher pressure of the reservoir. The system is purged by opening the reservoir to the atmosphere, creating a sub-atmospheric pressure in the bypass chamber. Air is admitted through the nozzle to purge the nozzle of slurry. At the same time, the check valve opens and excess slurry returns to the reservoir from the intermediate chamber.

Abstract: An apparatus for mixing and dispensing fluid components includes a mixing chamber for mixing reactive components prior to dispensing the components. The components are provided through separate valves to ducts in fluid communication with inlets to the mixing chamber. The valve actuator can be selectively positioned to prevent one of the valve from opening. The valves are ball valves which are actuated by a hydraulic actuator acting through a rack and gear system. The rack is cylindrical with a flat spot formed thereon for preventing rotation of an associated one of the gears as the actuator is moved.

Abstract: A fluid feeding device in which a battery, a DC motor and an electric pump are housed within a portable case. A fluid in a fluid container mounted on and communicated with the electric pump is discharged from a fluid discharge gun in a predetermined quantity or continuously. The fluid feeding device is compact in size and light in weight so that an operator can easily carry it in a wide range, whereby the fluid feeding device can be easily used at a high place or at a narrow place. The fluid feeding device is used, for instance, for feeding grease into mechanical bearings or the like.

Abstract: A toy pistol capable of ejecting a continuous stream of water while simultaneously generating a sound and a flashing light. A d-c motor positioned within the toy pistol operates a pump to pump water from a water storage cartridge in order to cause water to be ejected continuously from the toy pistol. The d.c. motor also causes an eccentric cam to rotate, such rotation causing repeated stricking of a sound generating bar, which creates a sound imitating a gun. Operation of the motor additionally causes repeated opening and closing of an electrical circuit containing a light bulb positioned in the barrel of the gun, thereby creating a flashing light effect.

Abstract: A dispensing apparatus particularly suited for dispensing oil and oil-flour mixtures in the baking industry includes a hopper for holding a quantity of the liquid to be dispensed and a plurality of positive displacement piston pumps. Separate inlet passages extend from the hopper to each of the pumps. Separate outlet passages also extend from each of the pumps. A discharge nozzle manifold having a plurality of discharge nozzles is connected to the pumps by a removable and replaceable plate-like gasket. The gasket is provided with connecting passages for connecting selected ones of the nozzles with selected pump outlet passages and diverting flow from other pump outlet passages and returning it to the hopper. The arrangement thus allows the number and pattern of dispensing nozzles in operation to be changed merely by changing the gasket without deactivating or changing the setting of the individual pumps.

Abstract: The recirculating beverage dispenser unit comprises a cooling unit, a carbonation unit, an inlet connection between a source of fresh water and the cooling unit, a fresh water valve and spigot, a delivery conduit coupling the fresh water valve and spigot to the cooling unit, at least one mixing valve and spigot coupled by a conduit to the carbonation unit and coupled by another conduit to a source of pressurized syrup, and a pump and other conduits for circulating carbonated water from and to the at least one mixing valve and spigot to and from the carbonation unit. The carbonation unit is mounted in the cooling unit and has a refrigerant carrying conduit coiled therearound in parallel relationship with a carbonation unit water inlet conduit. A spiral baffle is positioned around the carbonation unit to direct fresh water coming into the cooling unit around the parallel coiled tubings. Syrup carrying tubings extend through and are coiled about an inner surface of the cooling unit.

Abstract: Casting resin components (4,5) coming together in a mixer (6) are dosed and circulated by means of pump structures (3). Each pump structure (3) has a dosing pump (17, 9) and a circulating pump (16, 10). The piston (17) of the dosing pump (17, 9) does not leave its cylinder bore (9) during a pure circulation operation, while the piston (16) of the circulating pump (16, 10) alternately exits from its cylinder (10) and again moves into same.Since the same drive is used for the circulating pump (16, 10) and the dosing pump (17, 9), the expense of the system is low.

Abstract: A dispenser pump has pump chamber (34) whose volume is variable to draw up or discharge material, by the axial movement of a cup (25) on a stationary hollow stem (12). The seal (16) between them slides on an inner wall of the cup. A collector (30) at the lower end of the cup causes any material leaked past the seal to be guided inwardly to apertures (33) where it may drop to a body part (9) and pass via apertures (11') to a container (1) of the material.

Abstract: A post-mix beverage dispensing system includes a completely disposable concentrate dispensing assembly, a non-disposable mixing nozzle structure which mixes concentrate and water without permitting the concentrate to touch any nozzle walls and a valving system which permits a single peristoltic pump wheel to selectively dispense concentrate from one of a plurality of concentrate supplies operatively associated with the single pump wheel.

Abstract: A refrigerated beverage dispenser having a base supporting a container housing a device for circulating and whipping a beverage. An evaporator is located in the container while the refrigerator unit thereof is housed within the base, along with a motor and a magnetic transmission for driving a circulating and whipper device within the container. The impeller is rotatably mounted upon a pin in a housing chamber of the container and includes a plurality of ports associated with pipes for both circulating the beverage within the container and dispensing the beverage outside of the container. One of the pipes is connected to a port of the impeller housing and has a non-return valve which selectively regulates fluid communication between the container and the housing chamber. Another pipe connnects the impeller housing to the container exterior for dispensing the beverage.

Abstract: A pail mounted pump system having dual reciprocal pumps and pail cover in an integral design. The pump and pail cover are constructed in a single unit with a built-in intake siphon tubes. This arrangement provides dual pumps pumping the same fluid which keeps the system pumping should one of the pumps fail. The pail cover is formed with a recess and mounting holes for mounting a pump. A skirt on the cover has a flange on its inner surface forming an annulus which seats securely on the pail rim. A recirculation/agitation system is provided by a hose connected through a valve to the pump outlet recirculating fluid back to the pail through an aperture in the cover.

Abstract: In the case of a mixer head for reactive mixing of two or more plastics material components (A,B) in a mixing chamber (6), the mixture components are fed under the pressure simultaneously and conjointly into the mixing chamber (6) of the mixer head via a dosing valve (12, 14) in each case during a delivery stage. During a recirculation stage, the plastics material components are pumped around in a circulatory flow flowing through the dosing valve and through a recirculating valve (13, 15). To assure that even small delivery volumes per unit of time may be discharged evenly, the dosing valve (12, 14) and the recirculation valve (13, 15) are constructed as pressure valves and connected in series one behind the other, in such a manner that only the dosing valve or the recirculation valve is switched to the throughflow condition.

Abstract: A pumping system for containing and dispensing liquids, such as poisonous or hazardous chemicals and the like. The system has a spring-biased, manually-openable by pass valve incorporated therein which is selectively positionable in various positions without the user coming in contact with the poisonous or hazardous chemicals and the like.

Abstract: A hot melt foam adhesive system including a gear pump wherein gas is mixed under pressure into the molten adhesive and is driven into solution with the adhesive. The gas is supplied to the pump via a one-way check valve operative to prevent the back flow of molten adhesive to a gas flow control valve, regulator, and gauge. The check valve is positioned above the level of the pump so that molten adhesive cannot flow by gravity into the check valve. The check valve is so constructed that it is biased into a closed position by a spring on the gas side of the valve so that adhesive cannot collect around and foul the spring of the valve.

Abstract: A method and apparatus for dosing viscous, aerated material like ice-cream and ice mixes. The method comprises filling a volumetric dosing chamber from a supply, dispensing said amount through a dispensing conduit and returning at least part of the material remaining in said conduit to the supply. The apparatus comprises two preferably coupled three-way valves, the one connecting a dosing chamber with either a supply or a dosing conduit, the other connecting a suction device with either the dosing conduit or the supply.

Abstract: The device according to the invention comprises a cylindrical metering chamber (10) of circular section and with an approximately horizontal axis, which, in its upper part, has an aperture (14) opening out into a reservoir (16) filled with product to be metered (12), and which communicates with an outlet channel (18) in which a slide valve (20) moves periodically between a high closing position and a low end-of-metering position; a vane (26) extending radially along a shaft (28) and capable of being driven with a rotary movement of controlled amplitude, during which the free end (30) of the vane (26) sweeps the cylindrical internal surface (32) of the metering chamber (10); and a flap (34) capable of translational movement and of entering the metering chamber (10) periodically to delimit a wall by tangential contact with the said shaft (28), and then withdrawing to allow a complete revolution of the vane (26).

Abstract: Apparatus for melting and dispensing thermoplastic material including a hopper for receiving solid thermoplastic material, a flow-through grid melter secured to the bottom of the hopper and a reservoir mounted beneath the grid melter. A pump is mounted in the bottom of the reservoir and is connected to the reservoir outlet via a flow passage which contains a gate valve operable to enable the passage to be blocked and the pump removed for repair or replacement without the need to first drain the reservoir of molten material. The pump is driven by a motor which is mounted upon a pivotally supported plate such that the motor may be easily and quickly disconnected from the pump to further facilitate quick repair or replacement of the pump.

Abstract: A liquid supply apparatus is characterized by the provision of pumping means for supplied liquid interposed between a liquid supply portion and a portion to be supplied with liquid, a first valve mechanism having a small resistance in a forward direction, and a second valve mechanism having a high checking characteristic.

Abstract: There is disclosed herein a liquid spray gun which may be used for spraying paint. The gun includes a piston pump for withdrawing liquid from a reservoir and providing a force for spraying the liquid. The gun also includes a nozzle for receiving liquid from the piston and spraying the liquid under pressure. The piston pump includes a collection port for accumulating leakage liquid or flow from within the pump. A fluid circuit collects leakage liquid from the collection port and delivers the leakage liquid to a position forward and adjacent the nozzle. The fluid circuit includes a conduit having an inlet end connected to the collection port and an outlet end positioned adjacent the nozzle. The high velocity spray creates a low pressure area adjacent the nozzle and a venturi effect in the fluid circuit means for cooperation in drawing the liquid from the collection port to the nozzle.

Abstract: A method and apparatus for delivering a predetermined amount of material into a predetermined position on each of a series of moving trays while avoiding spillage of the product onto other portions of the trays. A conveyor lifts the material from a supply bin and deposits the material onto a shaker pan. The shaker pan delivers the material in an even flow on to a rotating turntable having a plurality of radially extending gutters thereon. The turntable directs the material to flow along the gutters and into a plurality of hoppers disposed at the periphery of the turntable. The hoppers are rocked to distribute the product evenly within each hopper. Once a hopper is full, any excess material falls onto a drip tray which returns the material back to the supply bin. The filled hoppers are rotated above the trays, which are moving on a conveyor, and release the material onto a predetermined area of the trays by means of funnels mounted adjacent to each hopper.

Abstract: A foldable drill implement has a supply hopper mounted on a center frame section and a rearwardly mounted broadcast hopper extending onto wing frame sections. Various augers connect the supply hopper to the broadcast hopper and maintain a level of fill in the broadcast hopper. Recycling augers return accumulated excess material from outer ends of the broadcast hopper for redistribution to planter drills. Folding of the wing section relative to the center frame section utilizes swing plates and spacer plates to dampen oscillation of the wing sections. Controls regulate flow of material by sensing accumulated excess material and deactuating the augers.

Abstract: A main screw feeder having a main screw housing set at an incline from the base of a bin. The main screw housing has two outlets, the advanced outlet and the recycle outlet. The advance outlet communicates with a metering screw housing in which twin screws of identical pitch are rotated in synchronous, intermeshed revolution. The delivery outlet for the metering screw housing communicates with the processing stages. The recycle outlet is positioned at an elevation higher than the advance outlet and discharges to the bin. A flow measuring device measures the return flow of granulated or powdered material expelled from the recycle outlet. The flow measuring device projects a prestressed cable into the recycle path of the return flow. A device for measuring any deflection of the cable and fluctuations in the tension thereon produce a signal which is a function of the return flow and which is used to control the speed of the main screw feeder.

Abstract: Apparatus for dispensing cold drinks comprising a cold water supply line in which cold water is flowing continuously, a valve comprising a valve body having passaging, an inlet for delivery of cold water from a first point along said supply line to the passaging, a main outlet for dispensing of cold water from the passaging, a valve member for the main outlet, and an auxiliary outlet for return of cold water from the passaging to a second point along the supply line downstream from the first point, and a Venturi in the supply line for causing a pressure differential in the cold water between the first and second points along the supply line for continuous flow of the cold water from the supply line through the passaging and the auxiliary outlet back to the supply line when the valve member is closed, thereby to assure having cold water on tap in the passaging for being dispensed when the valve member is opened.

Abstract: A decorating material dispensing machine having a pump and maniford disposed within a heating chamber for supplying decorating material, such as chocolate or the like, from a reservoir tank to one or a plurality of nozzles. A pressure gauge, thermometer and window permit monitoring of the operation of the dispenser. An adjustable valve determines the back pressure and therefore delivery pressure of the system and a thermostatic dial, the temperature of the chamber.

Abstract: A dosing pump (1) is created allowing to accurately dose a medium to be dosed as a function of time or of a flow rate. The dosing pump (1) utilizes a predelivery obtained by a diaphragm (11) as well as a piston-cylinder-pump for dosing. The pump cylinder is connected with the suction conduit so as to prevent any pressure drop when the piston emerges from the cylinder. A crystallization or polymerization of the dosing agent in the piston-cylinder-means is thereby prevented.

Abstract: A method and apparatus for dispensing large numbers of wine servings at uniform temperatures is disclosed which includes a source (14) of wine at room temperature connected to a refrigeration unit (16). A wine dispensing valve (18) is connected to the refrigeration unit (16) for dispensing wine. A wine metering and mixing valve (A) is connected between a delivery line (20) and a dispensing line (22) to bypass a metered amount of room temperature wine from the delivery line to the dispensing line and thus raise the temperature of the wine to a desired wine serving temperature prior to serving.

Abstract: A dosing pump (1) is produced, with which a precise dosing is possible as a function of the time or of a flow rate. The dosing pump (1) operates with a preliminary transport obtained by means of a diaphragm (11). The stroke volume of the diaphragm (11) is greater than the volume of the pipe element present between a preliminary transport chamber (9) and a dosed medium tank (16). It is thereby made possible to omit a return pipe and a suction valve and a pressure valve.

Abstract: An alumina slurry supply system for use in conjunction with a polisher or grinder apparatus or the like for preparing the surfaces of metallurgical specimens, the system comprising an alumina slurry reservoir, a recirculation pump disposed in the reservoir, an applicator arm for dispensing the abrasive slurry to a platen or lapping wheel of the polisher or grinder apparatus, a first conduit for receiving slurry pumped from the reservoir, a second conduit connected to the first conduit for recirculating the slurry to the reservoir, a third conduit leading from the first conduit to the applicator arm, a valve in the third conduit movable between an open position to supply abrasive slurry to the applicator arm and a closed position in which all abrasive slurry pumped from the reservoir is recirculated thereto, and a timer for controlling the operation of the valve.

Abstract: Portable liquid measuring and dispensing device comprising a main reservoir for containing oil and to which a chamber is connected for metering a predetermined quantity of oil, this chamber being solid with the main reservoir and having a visual indicator showing the quantity of liquid contained in the chamber. The device includes a liquid moving assembly solid with the reservoir and the chamber, this assembly being formed of a rotary pump brought into rotation by a D.C. motor connected to a power source including a polarity inverter switch having a pair of buttons, each actuatable to cause rotation of the pump in one of its two directions of rotation.

Abstract: A chip material container arrangement is provided for storage of material to be spread in the production of particle and/or fiber boards. The container arrangement is equipped with several discharge rollers arranged one above the other, a base belt and feeder devices. With a discharge opening extending over the width of the container, the density distribution of the material to be spread is controlled by removing appropriately dimensioned material quantities from individual partial streams which partial streams are later combined in the area of the discharge opening to form a total material flow.

Abstract: An easily operable liquid dispenser has a tamper-proof lid, a pressuring system that allows the dispenser to be operated either by a foot pump or by hand, and a control system that allows the amount of liquid dispensed by the dispenser to be varied.

Abstract: The present invention is directed to a fuel supply system for a fuel burner of the type that requires for proper operation an excess flow of fuel to be provided to the burner with that excess being recirculated. The fuel system further requires that sufficient fuel is added to the system to make up for that amount of fuel which is fired or burned. The fuel supply system includes a fuel pump which selectively draws from a fuel supply the make-up fuel flow and from a return path the excess fuel flow for recirculation. At any given moment all fuel flow from one inlet line and the other inlet line is positively closed.

Abstract: An apparatus for melting and dispensing thermoplastic material comprising a melter tank, a pump contained within the melter tank, a dispenser, and a manifold block mounted on the bottom of the melter tank. Thermoplastic material melted in the tank flows from the melter tank, through the pump, through the manifold block, to the dispenser. The pump is mounted in the tank and is either a reciprocating piston type or a rotary gear type pump, the two being interchangeable upon the tank. If a gear type pump is used, it is provided with a built-in pressure control valve operable to circulate the pump flow back to the tank when the dispenser flow is terminated or when there is greater pump flow than is required at the dispenser. Contained interiorly of the manifold block in the flow path between the pump and the dispenser there is a replaceable filter.

Abstract: The apparatus includes a plurality of colorant reservoirs passing colorants and other ingredients through feed lines to a peristaltic pump which pumps the colorants into the input of three-way valves which are each movable between a dispensing mode and a recirculating made. In the recirculating mode the colorants pumped by the peristaltic pump will travel through the three-way valves and through return lines to the reservoirs from which the material originally emanated. If the three-way valve is in the dispensing mode the colorant will be discharged into a sample container for receiving the colorant mix. The peristaltic pump is driven by a drive motor such as a variable drive DC motor. The system is controlled by a system controller which receives input from a device such as a microprocessor which evaluates the required volume or weight of each particular colorant necessary to make a specific colorant mix.

Abstract: A novel washing circuit for use in an automatic beverage vending machine is disclosed. The circuit comprises a switching cock enabling communication between the upstream side of a water-feeding pump and one end of a return conduit. The other end of the return conduit is adapted to be detachably connected to the water supply nozzle of the vending machine. When the switching cock is opened and the return conduit is connected to the nozzle, the water-feeding pump of the machine can pump washing solution through the water-feeding system of the machine and facilitate cleaning thereof.

Abstract: A method and apparatus for controlling and monitoring the application rate of the anhydrous ammonia to the soil. A heat exchanger is used to maintain the anhydrous ammonia in a liquid state so that a flow control valve coupled to the heat exchanger can accurately control the rate of flow of liquid anhydrous ammonia to a manifold. Separate lines connected to the manifold distribute the liquid anhydrous ammonia to nozzles associated with earthworking tools to incorporate the ammonia into the soil. A portion of the ammonia from the manifold is directed back to an expansion chamber in the heat exchanger. The ammonia in the expansion chamber partially changes from a liquid to a vapor, thereby lowering the temperature of the ammonia in the expansion chamber and transferring heat from the liquid anhydrous ammonia in the heat exchanger to thereby maintain the ammonia in the liquid state.

Abstract: Two measuring cups (5, 6) are alternately filled and emptied. The fill st is determined by an overflow, and the emptying time during which a withdrawal pump (30) is connected to the respective cup is determined by scanning pump revolutions. The scanned pump revolutions for emptying are compared with a desired pumping rate, entered into a counter (50) which decrements in accordance with revolutions of the pump (30), and, if a deviation from commanded pumping rate is sensed, a correction memory (60) is loaded which controls over a control unit (33, 61) change in pumping speed to null any deviation from commanded rate. To associate the commanded rate with actual weight of chips or fibers to be coated, the chips or fibers can be weighed continuously, and the continuously weighed number entered into the control computer (33) to generate a command number for entry into the decrementing counter (50).