Abstract: A sealing valve arrangement for dispensing apparatus having a turntable rotatably mounted on a support includes a valve with an outwardly protruding operator member with a free end remote from the valve, and a valve mount for mounting the valve to the turntable mount for travel with the turntable. A cam block mounted stationary on the turntable support defines a channel for receiving the free end of the operator member and, with rotation of the turntable, moves the operator member so that the valves move from one position to another.

Abstract: A piston-cylinder liquid sprayer of long spraying time and simple construction has a long piston stroke and is adapted to spray liquid steadily without loosening. An erecting wall having an upper end portion engaged with an upper portion of a cylinder is attached to the outer surface of a container body neck portion. An erecting guide trunk is connected to the lower end of the erecting wall, and surrounds the erecting wall at a constant distance. A sliding trunk moves a piston upwardly and downwardly and is fitted into a gap between the erecting wall and the guide trunk. The sliding trunk is guided by the guide trunk, allowing the sliding trunk to be stably moved upwardly and downwardly, even if a longer stem is used.

Abstract: A dosing system for filling containers with a particulate/liquid mixture includes three piston-and-cylinder devices, of which a first device delivers the mixture downwards to containers advanced beneath it, a second device feeds a thick particulate/liquid mixture via a conduit to the first device, and the third device feeds a thin liquid via a conduit to the first device. A liquid supply port is disposed peripherally in the cylinder of the first device and swept by the piston thereof, and a conduit in continuous communication with the port extends through the piston to a lower axial end of the piston.

Abstract: A metering device includes a valve body defining a chamber extending longitudinally between an inlet and an outlet and an intake valve having an opening extending into the chamber adjacent the inlet and a metering valve having an opening extending into the chamber between the intake valve and the outlet. A tube is connected to the chamber outlet, and a reciprocable piston closure is positioned for sealing the chamber from the tube. An intake piston is positioned within the intake valve and reciprocates in operation to draw product into the chamber in a retracted position and to seal the chamber inlet in an extended position. A metering piston is positioned within the metering valve and reciprocates in operation to draw product into the chamber in a retracted position and to expel product from the chamber by forcing product to open the flap in an extended position.

Abstract: An apparatus for introducing filler material in a fluid carrier into a measuring chamber in rapid succession is described. The apparatus includes a delivery subsystem for introducing the filler material into the fluid carrier. The delivery subsystem provides the fluid carrier and filler material to a diverter subsystem which separates the stream into two separate streams. The two separate streams are directed into a rotating concentrator subsystem that separates the fluid carrier from the filler material and compresses the filler material. The filler material is further compressed and dewatered in a taper subsystem and drain subsystem. The filler material is then dispensed from the drain subsystem into a measuring chamber where it is cut by a knife plate that includes two blades with overlapping cuts. The apparatus is capable of introducing controlled weights or volumes of filler material into a measuring chamber at high speeds.

Abstract: A filling apparatus for viscous foods comprising a vertical tubular filling nozzle having a flow inlet formed in a tubular wall close to the lower end thereof and a piston-incorporating metering cylinder in communication with the flow inlet, and a plunger accommodated in the filling nozzle so as to open or close the flow inlet. The plunger has an air discharge annular opening defined by a lower-end peripheral portion thereof for blowing off adhering food and a recess formed inside the air discharge opening and providing an air reservoir for preventing adhesion of the food.

Abstract: An improved pump-head structure, which has a valve annulus mounted on the inlet to the lower end of a liquid accumulator of the pump-head structure to prevent leakage of a liquid from the liquid accumulator. A plunger valve is connected to the valve annulus via a spring piece, which exerts a downward force on the plunger valve and thus maintains the inlet of the lower end of the liquid accumulator forcedly and tightly closed under normal conditions by the downward action of the plunger valve.

Abstract: The invention concerns a unit for dispensing at least one fluid product; this unit comprises at least one dispensing duct, each comprising at its end portion a closing system opening towards the outside. The closing system is formed by an obturator which forms part of a component made of an elastically deformable material and a seat which forms part of another component of the dispensing head. The obturator is in contact with its associated seat in the absence of any dispensing action, moving away from the seat by elastic deformation under the pressure of the product to be dispensed, and returning by elasticity into contact with the seat when the dispensing stops. The obturator is subjected to the action of a constraining element tending to keep it applied to the seat wherewith it cooperates.

Abstract: A system for dispensing liquid food products is disclosed. The product is drawn from a source to a metering chamber through a supply valve, and then conducted to a dispensing valve to fill performed containers. The valves have a valve stem that reciprocates to open and close the valve. The valve stem is supported in the passage through which the product flows by bearings. The bearings have balls that engage the stem and the wall of the passage. The use of balls to support the stem facilitates cleaning of the passage after use, and yet provides good support for the valve stem.

Abstract: A piston filler apparatus as disclosed in which the filler pistons and associated reciprocal valves are disposed below the product containing bowl so that they can be withdrawn into the bowl to effect easy in-place cleaning. A method of in-place cleaning is also disclosed, as well an an alternate method of operation.

Abstract: A trigger operated fluid dispensing device for mounting to a container comprising: a body having a front end including opposed side walls at the front end, a nose bushing extending from the front end between the body side walls and at least one, elongate, nozzle cap blocking member which extends from the body front end and which is adapted to engage and prevent rotation of a nozzle cap upon rotation of the cap without manipulation of the body side walls; a nozzle assembly at the body front end including the nose bushing, a nozzle cap received on the nose busing and cooperating structure on or in the nozzle cap and on or in the nose bushing for selectively establishing an off position, a spray position or a stream position of the nozzle cap upon rotation of the nozzle cap; the nozzle cap being mounted for rotation on the nose bushing between the three positions and the nozzle cap having engaging structure therein positioned adjacent the blocking member for engaging the blocking member when someone attempts to

Abstract: A manually operated pump device for dispensing fluids from containers is disclosed. The pump device is provided with a mobile cylinder, a trigger lever for operating the cylinder, and a fixed piston located inside the cylinder. In the pump device, there is also a gasket and a stem-like member located inside a delivery and suction valve. The gasket and stem-like member act together to permit fluid to flow from the cylinder and to a delivery head during a delivery stage. During a sealing stage, the gasket and stem-like member operate in conjunction to seal the cylinder. A spring acts between the cylinder and the piston to allow fluid to flow again through the delivery valve.

Abstract: The tamper evident cover assembly is used with a sprayer nozzle of a trigger sprayer of the type including a body, a trigger movably mounted to the body for operating a pumping mechanism upon actuation thereof and a sprayer nozzle at the front end of the body. The tamper evident cover assembly comprises a cover for the nozzle, at least one flange extending rearwardly from the cover and having first coupling structure thereon for coupling to the trigger, a frangible connection between the flange and the cover, and, second coupling structure on the trigger for coupling with the first coupling structure upon the flange, whereby actuation of the trigger will cause the cover to be pulled against the nozzle to cause tensioning and breaking of the frangible connection between the flange and the cover and separation of the cover from the sprayer nozzle, such resulting separation being evidence of tampering with the trigger sprayer.

Abstract: A finger actuated plunger of a dispenser has a protector cap telescoped over the plunger head for reciprocation independently thereof along the axis of plunger reciprocation. A portion of the cap side wall covers the discharge orifice in the head in a condition of non-use, and the cap side wall has an aperture adjacent such wall portion for alignment with the orifice for uncovering the orifice in a condition of use. A spring extends solely between the head top wall and the cap top wall for resiliently urging the cap into its condition of non-use.

Abstract: A dispensing pump having a minimal number of molded plastic components is configured to have a relatively low. profile when mounted on a spray container. The pump includes a base having a chamber depending downwardly therefrom within which is received a piston biased by a spring. The piston has a piston rod which extends upwardly through the base for coupling with one leg of a L-shaped handle pivoted on the base. Upon squeezing the handle, the handle rotates to lift the piston to pressurize liquid in the container. The liquid is dispensed laterally of the base through a valve body which includes a rotatable valve element seated therein. The rotatable valve element rotates about an axis perpendicular to the valve body and includes both an opening for releasing a stream of liquid from the pump and an opening for releasing a spray of liquid from the pump. In order to refill the chamber with liquid from the container, a dip tube extends from the base and is in communication with the chamber.

Abstract: A pushbutton for a fluid dispenser includes a chamber 39 provided with three outlet orifices 5, and at least one cylindrical cavity 24 having an axis of symmetry 2. A piston 31 secured to three outlet closures is slidably received in the cylindrical cavity, and is urged by spring 37 to cause the three closures to seat and seal against the orifices. The piston is pushed back by the pressure of the fluid substance emitted by a dispenser to open the orifices, and is extended towards the outlet orifices by a rod 32 having a degree of flexibility. The closures are constituted by three valve pins 35 secured to the rod, each having a tip 36; 36' configured to close one of the orifices.

Abstract: A viscous fluid dispenser is provided including a housing enclosing a pressurizable viscous fluid reservoir connected to a collapsible measuring chamber. A valve is connected therebetween and can be activated to fill the chamber on demand. The dispenser will discharge a premeasured quantity of fluid either proximally or remotely and direct dispensing of unmeasured quantities without modification.

Abstract: Dispenser heads for semi-liquid substances such as cosmetic or pharmaceutical creams generally comprise a dispenser valve capped by an actuating pusher. The substance is then dispensed through an orifice provided in the surface of the pusher and which is in communication with the valve via an outlet channel. Unless additional precautions are taken, the volume of substance filling the channel after first use of the pump may be degraded by coming into contact with ambient air, thereby degrading the quality of subsequent dispensing operations, or even making them impossible. The present invention avoids this difficulty by the use of a shutter constituted by a part made of resiliently deformable material having an end wall with an inside surface and an outside surface and a side wall extending from the inside surface of the end wall, the end wall having a slot passing through it which narrows in a slit at the outside surface.

Abstract: The present invention is directed to a metered side dispensing cap system for containers such as tubes and the like. It includes a chamber unit having an inlet opening in the bottom for flow of a material from a squeezable container into the chamber. The chamber unit has an outlet opening on a sidewall located near the bottom for dispensing material from the chamber in a metered amount. A one-way valve located in the inlet opening on the bottom of the chamber unit permits flow of material through that opening and prevents backflow of material. A piston mechanism moves upwardly and downwardly within the chamber. The piston mechanism is capable of upward movement by material entering the chamber unit when a squeezable container is squeezed and material enters the chamber unit through its inlet opening. The piston is capable of downward movement when its wide top is pushed downward, so as to dispense material through the sidewall outlet opening of the chamber unit.

Abstract: An apparatus for premetered "patch" coating discrete, incremental surfaces or substrates, such as printed circuit boards, integrated circuits and the like, with a pre-configured layer of a liquid in which a controlled volume per unit area of the liquid is applied to the substrate are disclosed. The liquid is dispensed from an applicator slot that is fluidly coupled to a liquid containing chamber. The volume of the liquid in the liquid containing chamber is varied in order to (1) sharply and distinctly start the coating "patch" by producing a pulse of liquid that flows out of the applicator slot to form a connecting bead of liquid coating on the coating surface and (2) sharply and distinctly terminate the coating "patch" by removing the bead of liquid connecting the applicator slot with the coated surface. The width of the coated "patch" is determined by the length of the applicator slot.

Abstract: An atomizing nozzle usable on a vaporizer or atomizer is provided, having a unified core and valve member and a diaphragm perforated by a narrow orifice. The unitary member is axially mobile and laterally guided in a chamber within the nozzle. Additionally, the unified member has, on its end remote from the orifice, a concave circular cup in which the edges of the cup are turned toward the orifice, and, on its end nearest to the orifice, a core portion which cooperates with the diaphragm to form a system of turbulent channels which supply the orifice.

Abstract: A dispensing package (14, 114, 214) which is made up of a reusable pumping head portion (16, 116, 216) and a body portion (18, 118, 218) to which the head portion is removably attached. The pumping action is initiated by the reciprocation of an annular, reciprocable dosing piston (30, 130, 230) which may be a part of the body portion (30, 130) or a part of the head portion (230). The reciprocation of the dosing piston is initiated by the arcuate movement of a pumping lever (40) that is carried by the head portion. The pumping lever is biased by a spring (46) to return to its original position at the conclusion of a pumping cycle. Striping can be accomplished by providing the dosing piston with a spout (32, 232') that extends downwardly therefrom, the spout having a circumferential series of spaced apart apertures (32d, 232d') extending therethrough above a lower bottom tip portion (32b, 232b') thereof.

Abstract: A device for metering products in paste form is provided including a metering chamber having at one of its ends a common filling and discharge opening. A metering plunger is reciprocally mounted within the metering chamber. The product is supplied in paste form into the metering chamber. A distributing cylinder is provided generally perpendicular to the metering chamber and has three lateral openings; namely: a first opening, a second opening facing the first opening, and a third opening axially offset relative to the first two openings. The distributing cylinder also includes a slide valve having a lateral channel and an axial channel.

Abstract: An apparatus for applying a flowable material, such as a pizza sauce, onto an object, such as a pizza shell, is disclosed. The apparatus comprises a source of the flowable material having a source outlet port and a chamber having an chamber inlet port and a chamber outlet port. The apparatus further includes a piston and cylinder for moving the flowable material from the source to the chamber and a flow control gate disposed at the chamber outlet port. The apparatus further includes an arm responsive to actuation of the piston for opening the flow control gate, thereby permitting a substantially uniform application of the flowable material onto the object.

Abstract: The trigger operated fluid dispensing device is adapted to be mounted to a container. The device comprises a body having a top wall portion and front end portion. A nozzle assembly is provided at the front of the body and comprises a nose bushing at the front end of the body and a nozzle cap rotatably mounted to the nose bushing. The nozzle cap has blocking structure that is engageable with structure that prevents rotation of the nozzle cap. A pull-away piece is detachably connected to the top wall portion of the body and has extending structure extending into the area between the nozzle cap and the front end of the body for engaging the blocking structure for preventing relative movement between the nozzle cap and the body.

Abstract: A system and method for dispensing a viscous adhesive onto a glass member to be attached to a vehicle body is disclosed. A reciprocating pump supplies adhesive to a dispensing point, with a pulse dampener member disposed between the pump and the dispensing point. A rolling diaphragm defines two chambers within the pulse dampener member, with the adhesive being communicated into a first variable volume chamber. A pressurized gas force is maintained on the opposite side of the diaphragm from the first variable volume chamber. The pulse dampener member includes a T-connection, with the pump supplying fluid into a first leg, the second leg being connected to the variable volume chamber and the third leg connected to the dispensing point. As fluid enters the first leg, the amount of fluid demanded at the dispensing point moves from the first leg directly into the third leg. Any excess fluid supplied into the first leg moves upwardly into the variable volume chamber through the second leg.

Abstract: A trigger sprayer having a nozzle assembly with a foam-inducing tube in front of its nozzle outlet orifice, an elongated pin having a convex tip for sealing the orifice, a door supporting the pin, and a hinge connecting the door to the nozzle assembly and strategically located to prevent interference between the pin and the tube when the door is swung about its hinge.

Abstract: The invention concerns a unit for dispensing at least one fluid product; this unit comprises at least one dispensing duct, each comprising at its end portion a closing system opening towards the outside. The closing system is formed by an obturator which forms part of a component made of an elastically deformable material and a seat which forms part of another component of the dispensing head. The obturator is in contact with its associated seat in the absence of any dispensing action, moving away from the seat by elastic deformation under the pressure of the product to be dispensed, and returning by elasticity into contact with the seat when the dispensing stops. The obturator is subjected to the action of a constraining element tending to keep it applied to the seat wherewith it cooperates.

Abstract: A liquid dispensing system for example for paints comprises a liquid reservoir, a circulating path for the liquid to and from the reservoir, a pump for causing a pressurized flow around the path, a three-way valve in the path which is controllable to divert liquid from the path via a second valve to a dispensing nozzle. The second valve is biased to a closed position and is openable by the hydraulic pressure of the diverted liquid to permit the diverted liquid to flow to the nozzle. In a multiple liquid dispensing system, e.g. a paint blending system, each liquid has its own dispensing system as described above and the plurality of second valves thus provided are disposed in a conical formation with the nozzles directed towards the apex of the cone.

Abstract: A metering and dispensing machine that operates in accordance with the position of a cross-bar. The cross-bar is powered by a pneumatic cylinder and reciprocates two piston pumps that draw liquid from storage vessels during a back stroke. The liquid is expelled during a forward stroke through a valve and an outlet opening. The amount of liquid dispensed is determined by the pump chamber volume and pump piston draw distance. Each pump is removably secured directly to a valve block. To vary the ratio of liquids expelled from the pumps, at least one of the pumps is replaced with a larger or smaller pump. Each valve head includes a plug valve which is rotated from a fill position to a dispense position by an independent valve drive mechanism. The mechanism is actuated by sensor switches which are activated by predetermined positions of the cross-bar.

Abstract: A dispensing device for the discharge of liquids, particularly for the spraying of the liquids employs a trigger operated bellows acting as the pump chamber. A nozzle carries the valve body of a discharge check valve for the pump chamber. The intake check valve for the pump chamber is formed as a one piece component with the pump chamber for reducing the number of parts of the trigger sprayer.

Abstract: A filling valve wherein a piston is mounted for angular movement about a vertical axis immediately above a thin bottom wall of a housing which defines a metering chamber for a flowable material to be introduced into a succession of vessels. The material which is to be dispensed flows from a metering chamber in the housing through one or more channels in the piston and into and from dispensing openings in the bottom wall. The bottom surface of the piston has sharp sealing edges which slide along the upper side of the bottom wall and shear off the flow of material at the outlets of the channels when the piston is turned to a position in which the outlets of the channels are sealed from the dispensing openings in the bottom wall. This prevents dripping of flowable material in such position of the piston.

Abstract: A dispenser for paste products comprises a container and a hollow dispensing head having a pumping member mounted on its interior, an actuating lever for the member, and a delivery conduit which is associated at one end with the pumping member. The head has a tubular extension facing the top end of the container, which matches the contour of the container. The extension is releasably attached to the container, thereby the latter can be provided in the form of a replaceable refill container. To extend the working life of the dispensing head, the pumping member has a leaf spring associated therewith which acts against the push force from the actuating lever.

Abstract: A unit for dispensing products in cream, liquid or powder form, comprising on a container (2) with a flexible bag or with a follower piston, a push button (8) forming a pump body sliding on a hollow piston (10) capable of being closed by a first valve (13), the outlet opening for the product in the push button (8) being provided with a second valve (25) that only opens in the dispensing direction of the product.

Abstract: A child-resistant element in the form of an overcap surrounds a rectangular-shaped nozzle at the nozzle end of a manually actuated liquid dispenser, the nozzle being mounted for rotation between discharge open and closed positions. The overcap has an opening in its end wall and is mounted on the nozzle for manual axial movement between extended and retracted positions and is rotatable together with the nozzle. A flat surface of the overcap overlies the flat surface of the dispenser body in the retracted position for resisting rotation of the nozzle from its closed position. The overcap in its extended position permits rotation of the nozzle from its closed position to its open position.

Abstract: A method of detecting breakage or breakage of a continuous bead of fluid material, for example, a coating material, during the discharge thereof from an applicator nozzle, which comprises the steps of providing the applicator nozzle with a vibration sensor operable to detect vibrations occuring in the applicator nozzle and to generate a vibration signal, indicative of the detected vibration. The vibration signal undergoes a change in level when the vibrations are actually detected by the vibration sensor and the change in level of the vibration signal is compared with a reference amplitude level. Only when the amplitude level of the vibration signal exceeds the reference amplitude level, the change in amplitude level of the vibration signal provides an indication of the actual occurrence of the vibrations in the applicator nozzle.

Abstract: In a device for pumping meat-containing products, such as pieces of meat, meat paste and meat pulp (dough), it is aimed at avoiding problems of the meat forming bridges in a feed space, of meat remaining in the device during a too long time, of too much churning up of the meat and to provide a simple device adapted to discharge at will a continuous meat discharge flow under constant pressure or at a constant flow rate. Thereto, there is a feed space with means for feeding the meat under pressure to one of a number of cylinders with reciprocating pistons or the like, acting in parallel, with a controlled valve in the delivery line between each piston and a common discharge duct. Several feed means are proposed, depending on the application of the devices for pieces of meat on the one hand or for paste or pulp.

Abstract: The present invention is based on the discovery that a cured organic or organosiloxane gel will enter and flow through a conduit to a dispensing location as a coherent, homogeneous portion of material when (1) one end of the conduit is immersed in the gel (2) a sufficient pressure differential is applied between the surface of the gel and the interior of the conduit to cause the gel to enter and at least partially fill a portion of the conduit, and (3) sufficient pressure is then applied within the conduit to cause the gel to flow in the conduit to at least one dispensing location where the gel is withdrawn from the conduit as an integral, homogeneous stream of material.

Abstract: A packaging apparatus for aseptic volumetric packaging has a fixed means for forming a flow of sterile air to the apparatus, a feed member, at least one pumping member which is movable relative to the flow of sterile air, at least one filler spout and at least one dispenser member attached to the pumping member and the filler spout and disposed so as to be alternatable between positions connecting the feed member to the pumping member and the pumping member to the filler spout. The pumping member comprising a cylinder connected to the dispenser member, a piston mounted to slide inside the cylinder, a drive rod fixed to the piston and connected to an actuator device, and an enclosure fed with sterile air and mounted adjacent the cylinder. The enclosure surrounds the drive rod of the piston and is fed with sterile air from the flow of sterile air by a fan member associated with the pumping member.

Abstract: Dispensing apparatus is provided for dispensing a frozen product, such as ice cream, in portions. The apparatus uses a prefilled container of product which is located in a housing of the apparatus. The container is deformable and has an outlet through which the product issues on the application of drive to the container to deform and reduce the internal volume of the container. Dispensing means is operated by the drive and a valve controls the discharge of product during dispensing. To maintain the product at a low temperature the container and the outlet are located in a refrigerated housing.

Abstract: A dosing system for filling containers with a particulate/liquid mixture includes three piston-and-cylinder devices, of which a first device delivers the mixture downwards to containers advanced beneath it, a second device feeds a thick particulate/liquid mixture via a conduit to the first device, and the third device feeds a thin liquid via a conduit to the first device. A liquid supply port is disposed peripherally in the cylinder of the first device and is swept by the piston thereof, and a conduit in continuous communication with the port extends through the piston to a lower axial end of the piston.

Abstract: A water gun, water pump, or the like which includes a housing having a reservoir for fluid. A chamber within the housing has a plunger slidably and sealably received within the chamber. A valve is in operable position with respect to the chamber whereby in a first orientation of the housing, displacement of the plunger evacuates fluid from the reservoir and forces fluid through the chamber in a first direction and in a second orientation of the housing, displacement of the plunger forces fluid through the chamber in a second direction and fills the reservoir with fluid.

Abstract: The vent on demand system for bottled water coolers employs a suction wand having water suction tube, vent tube and air pressure tube for sensing the water level within the bottle. The plumbing system is only exposed to atmospheric air during water dispensing. Air pressure trapped within a bulb well located at the lowermost end of the wand responds to water level within the bottle by changing air pressure which is sensed by a pressure switch employed to disengage the pump when water levels approach empty. A check valve prevents air from entering the water suction tube during bottle replacement and the vent tube is coupled through a vent valve which maintains the water delivery system in a sealed state, only venting to atmosphere during actual water delivery. The vent valve is simultaneously actuated when either hot or cold water buttons are depressed with the pump being actuated momentarily thereafter.

Abstract: A dispenser for pasty compositions has a delivery tube (3) with lateral passage openings (10) for a second component of a pasty composition developed in the delivery tube (3), and an elastically reformable pump element. The delivery tube (3) is closed by a valve body (19). A piston (33) is moveable through a housing of the dispenser in emptying direction upon reforming of the pump element. The lateral passage openings (10) for the passage of the second component can be closed by the same valve body (19), and the valve body is guided by means of a shaft in the delivery tube (3). In order to obtain in a manner simple to manufacture, a dispenser for pasty composition for possible delivery of pasty composition formed of several components, particularly an esthetically pleasing stripe formation, a stepwise widening of the delivery tube cross section which is developed in the direction of flow at the height of the upper valve-disk closure. Guide ribs for mating with the valve-disk.

Abstract: In a manually actuated sprayer having a nozzle rotatable from OFF to ON positions, a removable tear strip or a removable cap is provided for preventing rotation from the OFF position. Upon removal of the tear strip or cap, the nozzle is free to be rotated to its ON position.

Abstract: In a manually actuated sprayer having a nozzle rotatable from OFF to ON positions, a removable tear strip or a removable cap is provided for preventing rotation from the OFF position. Upon removal of the tear strip or cap, the nozzle is free to be rotated to its ON position.

Abstract: A liquid is dosed by an apparatus that has a housing formed with an inlet connected to a supply of the liquid, an outlet, a filling chamber, and a bypass chamber having an outlet side from which the outlet opens and an inlet side connected to the inlet. A pumping piston subdivides the filling chamber into an inlet compartment into which the inlet opens and an outlet compartment. A valve element in the housing can move between a filling position blocking the outlet and connecting the inlet through the bypass chamber with the outlet compartment and a feed position exposing the outlet and blocking flow between the inlet and the outlet compartment through the bypass chamber. The piston is alternately retracted through a back stroke while the element is in the filling position to draw liquid into the outlet compartment from the inlet through the bypass chamber and is advanced through a predetermined advance stroke while the element is in the feed position to eject the drawn-in liquid from the outlet.

Abstract: A paint toning machine comprising a plurality of color paste containers (1); a pump (2) for each paste container (1) for pumping color paste (3) for the dispensing and circulation thereof; and a dispensing valve (11) for each pump (2) for dispensing a desired amount of color paste. For the elimination of the problems caused by leaks occurring in the dispensing valve and the pipe connections thereof, the dispensing valve (11) according to the invention is arranged in the paste container (1) in the vicinity of a bottom (4) thereof essentially below the surface of the color paste (3) contained in the container.

Abstract: A paint toning machine comprising a plurality of color paste containers (1), and a pump (2) for each color paste container (1) for pumping color paste from the container for the dispensing or circulation thereof. For the elimination of the problems caused by leaks occurring in the color paste dispensing pump and the connections of the color paste suction and feeding conduits thereof, the pump (2) according to the invention is arranged in the paste container (1) in the vicinity of a bottom (4) thereof essentially below the surface of the color paste (3) contained in the container.

Abstract: A method of venting a plant for filling containers (2) with an apportioned quantity of liquid without air inclusions by means of a dispensing pump (9) in which two control valves (11', 12') disposed at the outlet from a filler pipe (4) are intermittently opened and closed, the liquid (17) being supplied via a buffer container (13).