Abstract: A mixing chamber (3) and a gas inlet chamber (5) are concentrically arranged in a closed housing (1) and divided from one another by a tubular partition wall (7) provided with micropores. A flow of a liquid, foamable medium is introduced by a pump (21) axially into the mixing chamber (3). At the same time, air produced by a compressor (23) is introduced via a housing inlet (17) into the gas inlet chamber (5) under such a pressure that the air can penetrate through the micropores in the tubular partition wall (7) into the mixing chamber (3). The partition wall (7) surrounding the mixing chamber and the peripheral wall (9) are replaceably mounted between two flanges (11 and 12). The cross-sectional profile of the axial inlet and outlet (15 and 16) is matched to the cylindrical cross-section of the mixing chamber (3) so that in operation a laminar flow of the foam mixture substantially parallel to the axis occurs through the mixing chamber (3).

Abstract: A device for regulating the fluctuations of a multi-phase flow having gas, fluid and solid components characterized in a vessel having a feed pipe and a draw-off tube disposed therein. The feed pipe being horizontally disposed and having a plurality of downwardly facing apertures to help suspend solids that have accumulated at the bottom of the vessel. The draw-off tube being vertically located within the vessel having a plurality of apertures all of which are disposed above the horizontal location of the feed pipe. The draw-off tube drawing off a mixture of gas and liquid. The vessel dampening the fluctuations of the multiphase mixture exiting the feed pipe.

Abstract: A cooking apparatus receives a sealed container of food inside a cooking chamber. A controller operates a motor to drive a rack and pinion gear set to lower a nozzle to puncture the cover of the container. Limit switches position the nozzle at a predetermined location within the container. The controller activates solenoids which open steam and/or water valves to permit steam and/or water from a boiler to be introduced inside the food container through the nozzle to mix and complete cooking of the food contents of the container. The controller operates the motor to withdraw the nozzle from within the container and activates a solenoid of a steam valve to provide steam through a confinement cylinder that subjects the nozzle to a steam bath after the nozzle has been retracted from within the food container. A limit switch cooperates with the controller to prevent the nozzle from being withdrawn from the cooking chamber.

Abstract: A milk foaming device for emulsifying steam, milk and air to produce foamed milk. The milk foaming device includes an ingredient combining assembly for combining the steam, milk and air connected to a swirl chamber for blending the ingredients. A discharge tube is attached to the swirl chamber for dispensing foamed milk therethrough. A concave notch is formed in the walls of the discharge extending from a dispensing port of the tube upwardly along the walls. The notch retards or prevents formation of bubble surfaces over the dispensing port of the discharge tube and thereby prevent splattering of milk. A laminator is provided in the tube and extending therefrom for inducing a columnar flow of foamed milk from the discharge tube.

Abstract: A blending apparatus, inexpensive in construction and requiring a minimum of recirculation, is today essential for economical and thorough blending of particulate material, for example, plastic pellets of virgin material and of pellets that have been reconstituted from recycled material. Construction of the blender is low in cost because the customary receiver, and its piping, conventionally installed below the blender are eliminated. The novel convex baffle serves:(1) as a termination surface for the conventional perforated blending conduits; and (2) retains a toroidal annular volume of particulate material in position between the upper outer surface of the baffle and the inside wall of the blender. The particulate material passes through the blending tubes, drops into the blending area below the convex baffle, whereupon the small amount of particulate material in the toroidal block or "keystone joist" is released to proportionally blend with it.

Abstract: An air distribution plate for incorporation into a material conveyor or a material separator has a plurality of apertured zones alternately arranged along the length of the plate. The apertures in the first series of zones are inclined in the direction of the desired flow of material in the case of the conveyor and in the direction of the desired air flow in the case of the separator and the apertures in the second series of zones incline in the opposite direction by the same amount. Each zone in the second series of zones has fewer apertures than the zones of the first series of zones.

Abstract: A method and an apparatus for dispersing or dissolving a pelletized material in a liquid, in which a pelletized material is placed on a platform in a container having a lower chamber portion, and a stream of liquid is introduced into that lower chamber to produce a vortex of the liquid which washes across the pelletized material, thereby causing it to become dispersed or dissolved into the liquid. In installations where the flow rate of the liquid is below a certain level, a supply of compressed air is injected into the liquid of the lower chamber to prevent mudding of the material.

Abstract: An apparatus for mixing a deionized water and a hydrofluoric acid precisely in the ratio of 100:1, so as to produce a mixture which are properly used in etching wafters. The mixing apparatus comprises a self-lubricating plastic container of a double construction which enables to obtain a more precise quantity of liquid. The mixing apparatus also comprises an electronic balance measuring the weight of the liquid mixture, an indicator indicating numerically the weight measured by the balance, a mixing tank mixing the liquids, and control valves supplying the liquids in large and small quantities, respectively. According to this arrangement, it is possible to obtain a mixture of a large quantity liquid or a small quantity liquid in a precise mixing ratio with a tolerance of within 1%. Thereby, any poor etching of wafers can be avoided.

Abstract: A cappuccino attachment for an espresso machine, the attachment comprising an upper frother body having a threaded upper opening, a threaded lower opening, and an aperture formed adjacent the upper opening; an extension having a first end coupled with the upper frother body, and a second end opposite the first end, a first aperture formed within the second end, a second aperture formed through the extension; an internal passage providing a fluid interconnection between the upper opening, the lower opening, the first aperture, and the second aperture, the passage being threaded adjacent the lower opening; an air intake adjustment mechanism having a cylindrical member with a hollow interior, the cylindrical member having a first end connected with the second end of the extension, the air intake adjustment mechanism operatively engaged with the hollow interior of the cylindrical member and functioning to control the amount of air passing into the internal passage; a hollow frothing tunnel having a threaded upper

Abstract: The present invention is to define an enclosed space by covering a holder which can hold numerous minute particles, and introduce a fluid into the enclosed space to stir up the numerous minute particles within the enclosed space with a turbulent flow of the fluid so that the minute particles are placed in and held by the holder After stirring up and loading the minute particles in the holder, the fluid is introduced into the enclosed space again to recover the remaining minute particles which have not been held by the holder. The number of minute particles required for one cycle of the loading operation are taken out by moving a particle push-up shaft vertically, having a recess at the distal end thereof, within a stocker which stores a large number of minute particles, and then delivered to the enclosed space with the fluid.

Abstract: An improved solid particulate matter blender which is essentially a cylindrical vessel with a hopper bottom and a central lift pipe through which pressurized gas is pumped in order to lift material from the bottom to the top for remixing. An internal cone structure mounted inside the conical bottom hopper improves the mixing action within the blender. A cylindrical extension is attached to the bottom of the internal cone structure and extends toward the bottom of the vessel. Material originating at various heights thus reaches the bottom and is lifted to the top together to accomplish the mixing action.

Abstract: A blending silo of the type having a silo vessel defining a center axis and provided with a conical bottom ending in a vessel outlet, includes a funnel with its longitudinal axis coinciding with the center axis of the silo vessel and with its interior space being subdivided by a plurality of sheet segments in several compartments which are successively arranged in circumferential direction such that neighboring compartments have differently sized inlet cross sections and/or outlet cross sections to attain a superior homogenizing of bulk material.

Abstract: A fluidized bed apparatus comprising a pair of separated fluid bed enclosures, each enclosing a fluid bed carried on an air distributor plate supplied with fluidizing air from below the plate. At least one equalizing duct extending through sidewalls of both fluid bed enclosures and flexibly engaged therewith to communicate the fluid beds with each other. The equalizing duct being surrounded by insulation which is in turn encased by an outer duct having expansion means and being fixed between the sidewalls of the fluid bed enclosures.

Abstract: A method and apparatus are disclosed for separating debris from a material product by recirculating the product in a product chamber with a fluid flow and using the fluid flow to entrain and remove debris.

Abstract: An integrated process blending apparatus which blends particulate material and also automatically controls the flow of material into the blender and out to the associated processing equipment. Load cells attached to the blender vessel are used to control the entry of material into the blender, while the pressure drop in the blender output pipe is used to control an output deflector to either remove or recycle material within the blender. The blender is also made more effective by dividing it into vertical compartments with separators which have angled portions preferably in their lower regions to cause different downward flow velocities in each compartment, and by creating a multistage blender by stacking sets of offset compartments one on top of another.

Abstract: An air distributing device mounted into the sloping wall of a hopper containing finely divided material, such as flour or cement, aerating and causing the discharge of the material with a pressurized air flow and keeping the material in constant motion toward the discharge outlet of the hopper, the air distributing device being substantially hemi-spherical in form and providing a wide distribution of the pressurized air.

Abstract: A liquid is supplied to a vessel (10) to form a pool (21) from which it discharges through a venturi. A supply pipe or pipes (12, 30) convey other liquids and/or gases from separate sources or from above the liquid pool into the venturi for mixing with the liquid. The supply pipes can extend through the pool and be perforated (22) to tend to maintain the level of the pool. Associated with the venturi are pressure sensors (40, 41) for measuring flow and a densiometer (52) permitting mass flow rate measurement of gas and liquid phases. The apparatus can be incorporated in a cartridge (60) for reception in a receptacle (61) at a subsea installation.

Abstract: A method and apparatus is provided for blending solid particulate material in a vessel which includes a center lift column and a first downcomer channel which includes n successive vertical sections and n flow ports respective located at a top portion of the n sections. The n sections include withdrawal structure for providing a volumetric outlet flow rate which includes a flow rate contribution from each of the n sections which is 1/n of the outlet flow rate. The apparatus can also include a second channel which includes a plurality of vertically spaced inlets for receiving particulate material from different vertical locations within a blending vessel of the apparatus and an outlet for returning particulate material to the lower part of the vessel, with each of the inlets of the second channel including a baffle extending into an internal flow area of the channel.

Abstract: Accordingly, the present invention is an apparatus for mixing gas and air to obtain a plurality of predetermined gas-air concentrations including means for supplying gas from a constant pressure gas source. A conduit has a first end connected to the supplying means and a second end connected to a means for diffusing air with the gas to obtain a predetermined gas-air concentration.

Abstract: An integrated process blending apparatus which blends particulate material and is also adaptable to store blender inventory to thereby integrate process feed with the blending function. The apparatus comprises a fluidized bed blending means to preblend that raw feed which is not send directly to the gravity blender. Overflow from the fluidized bed means is directed into a storage chamber means from which it can be withdrawn upon demand and sent into the blender. The blender is also made more effective by dividing it into vertical compartments with separators which have angled portions preferably in their lower regions to cause different downward flow velocities in each compartment, and by creating a multistage blender by stacking sets of offset compartments one on top of another.

Abstract: A method and apparatus is disclosed for mixing or agitating fluids using vortex rings in which a tube of inside diameter d is inserted into the fluid with an open end in the fluid. Fluid is drawn into the tube, and a slug of fluid is propelled a distance L down and out of the tube to create a vortex ring at the exit of the tube for propagation through the fluid. The ratio of L/d is between 0.8 and 3.8. The propelling means preferably involves a pulser cylinder communicating with the tube and a piston positioned in the pulser cylinder for reciprocating motion towards and away from the fluid to be mixed or agitated, or a bellows serving a similar function. The propelling means provides a generally square wave pressure impulse to the fluid to eject it from the tube in the form of a vortex ring.

Abstract: A heater/mixer device is disclosed for use with laboratory vials, test tubes, or similar containers containing liquids. The heater/mixer includes a chamber formed in a block of material such as aluminum, with an electric heating element in contact with the block. The vial fits loosely in the chamber. Compressed air passes into the chamber through an inlet in the block, so that the vial is revolved by a circular air flow in a vortex fashion. This revolving motion creates a vortex in the liquid inside the vial, and so mixes the liquid. The air circulation also improves heat transfer from the block to the vial.

Abstract: A non-homogenous mixture of liquid and gas is fed into a vessel to form a body of gas above a pool of liquid. Liquid is fed from the pool through a discharge pipe containing a constriction forming a venturi and gas is drawn from the gas body through a pipe extending through the liquid pool into the discharge pipe to effect mixing of the liquid and the gas in the venturi. Perforations in the discharge pipe adjust the amounts of gas and liquid leaving the vessel to maintain both liquid and gas within the vessel.

Abstract: A method for intimately mixing fluids in a two-stage process is disclosed. The method includes the steps of subjecting a continuous flow of an aggregation of fluids to free vortex flow, having axial and tangential velocity components, and then substantially removing the tangential velocity component to substantially recover the tangential velocity energy so as to provide a discharge flow which is substantially axial.

Abstract: A method and apparatus for blending a material feed and/or separating debris from a material feed is disclosed in which a feed separator is used with a blender and/or debris separator. The feed separator separates a feed from the conveying air flow which conveys the feed and the conveying air flow, devoid of feed, is then used to blend the conveyed feed and/or separate debris therefrom.

Abstract: An aeration device to facilitate the flow and discharge of bulk material granules through a discharge opening in a bulk material container is disclosed. The aeration device includes at least one self-supporting molded plastic hollow body which is adapted to overlie an air inlet in the bulk material container at a predetermined distance above the discharge opening thereof. Each of the molded plastic hollow body aeration devices include an inner arched wall which is adapted to face the air inlet in the bulk material container and an outer arched wall facing away from the air inlet. The molded plastic hollow body is formed in a porous construction having a plurality of openings of predetermined porosity along the inner arched wall, a plurality of openings of predetermined smaller porosity along the outer arched wall, and inner tortuous pathways ending between the openings in the inner and outer arched walls.

Abstract: A gas bubble generator for mixing or promoting turbulence in a liquid medium, particularly sewage or effluent, comprising a collector for gas which collector is submerged in the medium and has an exit from which leads a pipe with a curved part between the exit and a free end of the pipe from which gas escapes as a bubble to surrounding liquid medium. The free end is spaced laterally from the exit, and curvature of the curved part is such so that there is no obstruction of the pipe by the medium, the curvature forming a circular arc of 135.degree. for example. The exit of the gas collector is preferably aligned with a gas inlet to facilitate cleaning of the pipe in situ (i.e., with the generator submerged) by insertion of a flexible rod-like cleaning tool into the gas supply line, straight through the inlet and the exit, and into the pipe.

Abstract: An apparatus for mixing concrete which includes a tank having at least a portion thereof which permits the inside of the tank to be visually observed from the outside of the tank. An inlet is disposed in the top of the tank for inserting concrete ingredients. An outlet is disposed in the bottom of the tank for permitting the mixed concrete to be withdrawn from a chamber inside the tank. The tank includes seals for selectively sealing all openings into the chamber of the tank and an opening is provided for introducing air under pressure into a lower portion of the tank for the purpose of being able to mix the concrete using such air pressure.

Abstract: Apparatus for blending solid particulate material which includes a center lift or blending column with gaseous fluid under pressure supplied to the bottom of the column for entraining material in the vessel and lifting it up through the column to circulate material within the vessel. Recycle channels are provided on the periphery of the vessel for withdrawing material at various heights and supplying it to the bottom of the vessel for recirculation through the lift column. Each of the recycled channels includes a plurality of vertically spaced apart inlet openings each with a baffle positioned therein to permit material to simultaneously enter the recycle channel at more than one point along the height of the vessel. These baffles may be equipped with operators to selectively position the baffle to control the flow of material into the recycle channel. The apparatus also includes an arrangement defining a seal leg at the bottom of the vessel to ensure proper recycle of material through the apparatus.

Abstract: Pressurized air is applied to dry granular materials as they enter the top of a vessel to mix the materials together and the mixed materials continuously flow out of the vessel through a bottom discharge opening.

Abstract: A vertically oriented generally cylindrical vessel or hopper holds dry granular materials which are mixed together by applying repeated short bursts of pressurized air from nozzles in an air manifold which direct the air substantially parallel or slightly inward to the longitudinal axis of the hopper to repeatedly lift and drop the materials in the hopper to create a tumbling action. Adjustable throttling valve means are provided in the pressurized input to the manifold to control the air flow to and the pressure at the manifold.

Abstract: A pressurized fluid is injected into a mass of material through at least one length of hose or other tubing of inherently resilient, elastomer material having one end closed and provided with at least one series of potential openings cut into the elastomer material along the length of the tubing so as to be normally tightly closed by reason of the resilency of the elastomer material but stretched open under the influneces of the pressurized fluid, which is introduced through the opposite end of the length of tubing. Gravity discharge of particulate material from a vessel having a hopper portion at its bottom can be effectively activated in this manner by the fluid-injection device of the invention.

Abstract: A bubble generator for producing cellular concrete which comprises an interchangeable housing containing a plurality of particles. The housing is releasably connected to a first and second retaining means at its respective first and second ends for retaining the particles in the housing. The particles contained in the housing can be the same or different in size, substantially spherical or nodular in shape, and about 100 to 6000 in number. The device generates uniform and strong bubbles of frother solution for cellular concrete.

Abstract: An apparatus in which particles are moved from one end of a duct to the other end thereof. The particles in the duct are fluidized. A pressure differential is generated which moves the fluidized particles in the duct from one end of the duct to the other end thereof.

Abstract: A method for producing selectively controlled pressure pulses in a mass of gas, particularly contained in a space of large dimensions. To achieve a sufficiently high power in the pulses, the pulses are generated by a valveless displacement machine in which the pressure when the machine opens towards its outlet port differs from the pressure of the mass of gas. The pulse is generated as the working fluid, due to said pressure difference, flows at high velocity through the outlet port. An acoustic power of the generated pulses of up to 20 kW can be attained by the method. The invention also concerns a rotary displacement machine for performing the method.

Abstract: An automatic device for obtaining frothy milk comprises a first mixing assembly (30) which feeds a second frothing assembly (40), comprising an expansion chamber (17), a milk feeding duct (31) being provided in the first assembly (30) inside a nozzle (13) for the pressurized steam, this nozzle being coaxial to the milk duct (31), the outlet of this duct slightly projecting over the steam outlet. The milk-steam mixture which is formed, tangentially flows to the expansion chamber, which has a circular section. Preferably the diameter of the nozzle (12) of the outflowing milk is about 1.1-1.2 mm, while the clear radial span of the annular section nozzle (13) of the outflowing steam is about 0.2 mm, the milk outlet projecting about 0.2 mm with respect to the steam outlet.

Abstract: A modularly constructed, trailerable, skid mounted, multi-compartmented concrete mixer and cement storage silo having a plurality of longitudinally aligned, bottom mounted, driven feed chains. In a combination construction, a single motor is cooperatively coupled to the feed chains of each mixer compartment and the feed chain of the cement silo to feed the cement/sand/aggregate in metered quantities to a turreted, separately powered auger where water is added and along the length of which the concrete is mixed. A silo vent column includes a plurality of fabric collection filters and means for vibrationally removing and reclaiming the cement. Air infiltration ports mounted along the bottom of the cement silo and one or more vibrators mounted to the mixer adjacent the sand and aggregate bins prevents crusting. Alternatively, the silo may be self-powered, and/or the mixer and silo may be transported independent of one another and/or without the trailer.

Abstract: An apparatus and method are provided for blending solid particulate material. The invention employs equipment for enabling simultaneous drain and recycle, for selective top filling or bottom filling of the vessel, and for providing a bypass line for removing plugs which may form in the lift pipe. The apparatus includes a continuous blending unit which includes a sensor to measure the amount of material in the vessel by measuring its height or weight, and a controller, responsive to the sensor, for controlling the fresh particulate material feed rate and/or the material withdrawal rate so that the fresh material supply rate and the blended material withdrawal rate are proportioned to control the material level within the vessel to a desired level.

Abstract: A process for reheating and/or complete cooking and baking of food-stuffs, especially of cooking, baking or grilling products, wherein a mixture of heated air and water vapor is introduced directly into the interior of the food-stuff before and/or during the heating procedure.

Abstract: The discharge bore of a liquid ice cream reservoir supports a metering device extending into it. Liquid mix flows from the reservoir through an orifice in the metering device into an inner bore. Suction created by the liquid flow draws air into the inner bore through an air metering orifice where it mixes with the liquid, the mixture then flowing by gravity to the freezer barrel. An inner valve body within the metering device contains a plurality of metering orifices of incrementally increasing sizes which can be selectively aligned with a a discharge orifice to control the flow rate of the liquid. Indicia on the valve body provide a visual indication of the orifice selected.

Abstract: A continuous digesting apparatus for digesting a high viscous material such as a raw material for bean curd (for example, a Japanese food "tofu") or various kinds of soups. According to the digesting apparatus of the present invention, the digesting chamber is divided into a plurality of compartments by a plurality of partition plates each having a notch and therefore the raw material in each compartment can be sufficiently mixed and uniformly digested by the injected steam and the following raw material fed from the upstream compartment through the notch of the partition plate. This makes it possible the raw material to be uniformly heated and mixed. In addition, the partition plates can prevent the formation of bubbles of active ingredients such as protein included in the raw material and the discharge of the active ingredient from the discharging pipe.

Abstract: An enriching device consisting of a container which comprises a removable tightly fitting metal body the sparingly volatile material being present in a coiled groove. During operation of this device transverse flows and shortcuts, respectively, of the carrier gas flow occur. To assure that the carrier gas flows through the material without having an escape possibility, the groove (5) is made either in an outer wall of the metal body (8) or in the bottom (4) of the container (1), and the parts (6) present between the individual turns of the groove have a cutting edge, i.e. a cross-sectional profile in the form of a wedge, the tip of which is in contact either with the smooth inner wall of the container (1) or with the smooth lower side of the metal body (8). The device is suitable for adjusting a defined mass flow of sparingly volatile materials which are used as starting compounds for chemical deposition from the gaseous phase.

Abstract: Fluidized bed apparatus comprises a perforated grid to which fluidizing gas is fed by way of a plurality of tubes to fluidize particles supported on the grid. Each tube is connected to a respective blow opening of the grid by way of an erect tubular end part.Apparatus for supplying the openings of the grid with unclogging gas comprises a plurality of injection tubes, each arranged to extend within a corresponding tubular end part. Each injection tube has a number of lateral orifices for the passage of the unclogging gas to be supplied to the injection tube.The unclogging gas is used to disaggregate any particles accumulating in said tubular end part during stoppages in operation of the bed.

Abstract: The instant invention relates to a process for the blending of bulk materials by means of a jet gas blender, whereby the blending porcess is initiated only when full gas pressure is reached and when the valve immediately upstream of the storage tank (3) has been closed. At the end of the set time period "t.sub.1 " the valve (4) leading to the blending container (6) is closed in effect simultaneously and the valve (4.1) leading to the storage tank (3) is reopened, whereby the blended material settles in the blending container (6) without being disturbed by turbulence in this control position and whereby this phase is maintained for a set period of time.Only at the end of that period of time is the line cross-section leading to the filter (8) opened to allow exhaust air to go through, and its passage is thereby adjusted so that the quantity of exhaust air going through the filter remains approximately constant per time unit.

Abstract: An apparatus for making a post-foaming gel comprising, a first cylinder having a chamber and a slidable piston separating the chamber into a first compartment to receive a gel base and a second compartment, a second cylinder having a chamber and a slidable piston separating the chamber into a first compartment to receive the gel base and a second compartment, a conduit connecting the first compartments of the first and second cylinders, a device for reciprocating the pistons in the first and second cylinders to cycle the gel base through the conduit between the first compartments of the first and second cylinders, and a device for introducing a foaming agent to the gel base while it is being cycled between the cylinders.

Abstract: A blender for solid particulate material such as plastic pellets which includes an apparatus for separating a fine fraction of material from the plastic pellets. This is accomplished by a separator shell which surrounds a vertical lift pipe in the blender. Gas under pressure is utilized to circulate material through the lift pipe from the bottom of the vessel to the top of the vessel to blend the material. As material is discharged from the vertical lift pipe, the air supplied through the lift pipe for lifting material flows through material dispersed within the separation zone to entrain the fine material and convey it through a vent to a high efficiency dust collector. A by-pass conduit and by-pass control valve are provided to control the velocity of gas through the separation zone to control the size particle of the fine fraction which is separated.

Abstract: A high capacity withdrawal system for a pellet blender which includes a venturi shaped gas supply nozzle mounted in the gas inlet, material outlet of the vessel. The venturi nozzle allows high velocity gas to be supplied to the bottom of the vessel for circulating material through a vertical lift column in the vessel. When it is desired to discharge material from the vessel, the flow control nozzle is moved away from the discharge opening to increase its effective size to allow rapid withdrawal from material from the vessel.

Abstract: A fluidization apparatus for powder coating devices is provided which comprises a housing that is subdivided by a porous horizontal wall into an upper housing portion and a lower housing portion. The lower housing portion is provided with a compressed air feed. The upper housing portion is provided with a connecting conduit to an injector fed with compressed air and is provided with a powder feed above and through its cover. The lower housing portion is a cylinder having a circular floor area in which an air turbine is mounted and which includes an unbalanced mass. The upper housing portion is a cuboid having a quadratic floor area, whereby the length of a quadratic side corresponds to the length of the diameter of a filter mat having the shape of a circular disk, the filter mat separating the upper and lower housing portions.

Abstract: An air distributor head mounted in a sloping wall for a hopper for pulverulent material to agitate and aerate the material as it travels down the wall surface toward the discharge opening in the bottom of the hopper; the head assembly including a generally cylindrical head with air flow passages and having an expandable generally cylindrical resilient skirt surrounding the body thus permitting air supplied through the passages under the skirt to be discharged into the pulverulent material to incorporate a flow of agitating and fluidizing air into the material.

Abstract: A device for blending dust, powder or coarse particle bulk materials, having a first upper blending device with a cylindrical blending container and a connecting discharge funnel which tapers conically towards a second lower blending device. The second lower blending device having a cylindrical container and a connecting discharge hopper which tapers conically towards the bottom to form an upper and lower mass flow silo. There is a blending pipe installed in the upper blending device which extends approximately to the lower end of the upper discharge funnel. The blending pipe contains inlet openings throughout its whole length for bulk material wherein the concentrically installed blending pipe is vertically subdivided into gravity pipes arranged side by side. Each pipe contains several inlet openings arranged above one another. The blending pipe is constructed cylindrically in the lower end region with the bulk material being transported back via a conveying pipe.