Abstract: A bowl for a kneading machine includes a bottom provided with an opening, a discharge device equipped with a plug, and an actuator configured for moving the plug between a position for closing the opening, in which the latter is engaged by the plug, and a position of discharge of the bowl, in which the opening is disengaged from the plug so as to be able to discharge through it the dough prepared in the machine. The actuator is a linear actuator configured for moving the plug, and cam means are configured for guiding movement of the plug along a path comprising a horizontal rectilinear stretch.

Abstract: The invention relates to a device for producing concrete blocks, particularly paving stones, building blocks or the like, comprising a storage container forming a receiving chamber for a plurality of layers of concrete in different colors. Dispensing means are provided, in order to dispense partial amounts of the layers from the receiving chamber such that a release device connected downstream receives a mixture of the layers of concrete in different colors. At least a partial section of a side wall of the receiving chamber is provided with at least one dispensing opening for dispensing a partial amount of the layers. The size of the passage of the dispensing opening can be varied by the dispensing means.

Abstract: Provided are methods and systems for introducing a wet gypsum accelerator or other high viscosity production additive to an aqueous dispersion of calcined gypsum in a discharge apparatus downstream of a stucco mixer in which the dispersion was prepared. These methods and systems are useful in the production of various gypsum products such as board including wallboard and ceiling tiles.

Abstract: A sulfur-containing material in a melt state is stored in material hopper 1 heated to a temperature within a preset temperature range of which a lower limit is equal to or above a melting point of sulfur. The stored sulfur-containing material is sucked by pressure generators 2a, 2b and pulled out into cylinders 11a, 11b heated to a temperature within the preset temperature range. The pulled out sulfur-containing material is pushed out from the cylinders under predetermined pressure applied by the pressure generator, and thereafter, the resultant material is injected from injection port 24 into mold 5 having therein a cavity which can be hermetically sealed and the mold being heated to a temperature within the preset temperature range. The injection port of the mold after the sulfur-containing material is fully injected in the cavity is closed. By stopping heating of the mold, the sulfur-containing material injected in the cavity is slowly cooled.

Abstract: The invention is a device for processing materials comprising a mixing chamber having a valve for removal of the material from the mixing chamber and a piston which fits within the mixing chamber in a manner such that the piston can be moved to remove substantially all material from the mixing chamber via the valve; at least one, preferably at least two, retractable mixing element(s) wherein each of such elements is movable in and out of the mixing chamber through a port wherein the element and port are configured such that during mixing and when the element is withdrawn from the mixing chamber substantially no material is removed from the mixing chamber via the port. The invention is also a method of using such a device and a system comprising use of such devices in an automated or partially automated array.

Abstract: The invention relates to a mixing kneader comprising at least two shafts (2,3) configured as hollow shafts, on whose surfaces kneading bars (4) are disposed on elements (5). The construction of the shafts is selected in such a way that the resonant frequencies of the shafts have a separation of at least 5% from the excitation frequencies. At least one of the shafts is preferably flowed through by a temperature-control medium, the inlet being disposed on one side and the outlet on the other side of the shaft. The mixing kneader preferably comprises at least one orifice above the shafts which is configured as a dome, the dome being closed by a displacer (22). In addition, at least one orifice for product withdrawal is provided, whose orifice cross section is adjustable during operation.

Abstract: Provided are methods and systems for introducing a wet gypsum accelerator or other high viscosity production additive to an aqueous dispersion of calcined gypsum in a discharge apparatus downstream of a stucco mixer in which the dispersion was prepared. These methods and systems are useful in the production of various gypsum products such as board including wallboard and ceiling tiles.

Abstract: A vertical mixer assembly for mixing a bulk material is disclosed. The vertical mixer assembly comprises a floor having an upper surface; at least one wall extending from the floor and having an interior surface and an upper edge; the floor and the at least one wall defining an open topped mixing chamber having a general tub-shape suitable for receiving the bulk material; at least one vertical auger positioned in the mixing chamber for mixing the bulk material, the auger having a flight suitable for mixing the bulk material upon operation of the auger; an opening in the mixing chamber for allowing egress of the bulk material, the opening having a wall portion and a floor portion; and a door assembly. The door assembly allows for more consistent unloading of the mixed bulk material and for quicker unloading of the mixed bulk material.

Abstract: Improved, low- or no-waste control methods for food processing systems including a preconditioner (14) and a downstream processing device such as an extruder (16) are provided. The control methods include both startup and shutdown sequences, and an optional flush sequence. During startup, a gate (64) of preconditioner (14) is initially closed and is thereafter sequentially opened to a full open, normal operating position after predetermined preconditioner temperature and/or weight set points are achieved. Shutdown involves terminating the flow of ingredients to the preconditioner (14) while the gate (64) remains open, with the preconditioner operated to deliver the preconditioned material within the preconditioner (14) to the extruder (16) for as long as possible in order to minimize any residual waste within the preconditioner.

Abstract: The invention is a device for processing materials comprising a mixing chamber having a valve for removal of the material from the mixing chamber and a piston which fits within the mixing chamber in a manner such that the piston can be moved to remove substantially all material from the mixing chamber via the valve; at least one, preferably at least two, retractable mixing element(s) wherein each of such elements is movable in and out of the mixing chamber through a port wherein the element and port are configured such that during mixing and when the element is withdrawn from the mixing chamber substantially no material is removed from the mixing chamber via the port. The invention is also a method of using such a device and a system comprising use of such devices in an automated or partially automated array.

Abstract: A mixing apparatus comprises first and second opposing mixing members rotatable relative to one another about an axis and which have facing surfaces which extend away from the axis and which define a mixing chamber therebetween. Means are provided for rotating at least one of the mixing members to provide relative rotation between the first and second mixing members in a first rotational direction. An array of mixing formations on at least one of said surfaces interact to mix material within the mixing chamber and are configured to propel material within the mixing chamber towards the axis. The number of mixing formations on at least one of the surfaces increases with radial distance from the axis.

Abstract: A mixer wagon includes a mixing chamber having a bottom, a fill opening larger than the bottom, and a wall. A work tool is provided in the mixing chamber for sweeping over a work area on the bottom. The wall is provided at its side with a flattening defined by curved portions, the flattening having assigned thereto a discharge opening which is closable by a slide. The flattening encloses with the mixing chamber bottom a first inclination angle that is smaller than a second inclination angle enclosed by the curved portion with the bottom. A comfortable lateral discharge of the fodder is combined with a thorough mixing by providing that in the vicinity of the bottom the slide and the curved portion of the wall on the discharge opening follows the shape of the circumference of the work area, and the opening and closing path P extend at an angle that is substantially equal to or larger than the larger inclination angle.

Abstract: In a dough mixer for preparing dough, the essentially cylindrical chamber with horizontal axis within which kneading elements (4, 4c, 4b) rotate coaxially or parallel to this axis, between two casing surface sections (1a) with the same casing line, two level surface sections (1b, 1c) which are essentially formed by the surface of sliding (2b, 3b) blades (2, 3) with upper charging opening (2a) and lower discharging opening (3a) in closed position, and the aforementioned surfaces (1a, 1b, 1c) turn into two front, coaxial, separated circular surfaces (1e, 1f) via rounded areas (1g) with the largest possible radius, such that, together with the rotating (4a) kneading element (4, 4c, 4d), which likewise has very round forms, they enable the preparing and compressing of dough and rolling into balls of an individual dough portion that is discharged without residue of ingredients or dough.

Abstract: The invention relates to a method for the vertical mixing of gaseous, liquid, powdery and/or pasty products using, for example, a hollow shaft and inner shaft arranged in a housing, whereby paddle-shaped mixing tools are provided on the hollow shaft and on the inner shaft there is provided a discharge device arranged below an outlet of the mixer. The mixer is thereby completely filled in the operating state and the product and additives are pressed onto the inner wall of the housing by means of the mixing tools. The product flows continuously downwards under the force of gravity and acts against the partly backward-conveying paddles. The continuous product flow is regulated using a rotary slide valve provided at the outlet. The mixer is especially suitable as a dosing device and/or for lubricating extruder and/or expander products.

Abstract: An improved waste treatment chamber which comprises a first substantially, cylindrically shaped chamber portion, a first tapered end portion and a second tapered end portion, the cylindrical body and first and second end portions further comprising a plurality of components which may be transported individually and assembled to one another via bolting or the like so as to define an enclosed treatment chamber therewith, the assembled chamber mountable on bearings for rotation during the treatment process. Further, there is provided an improved container opening for placing waste therein or removing waste therefrom, which further comprises a rotatable locking system so that when the lid is in the open position, the lid is rotated and locked in place along the wall of the chamber to provide the necessary opening to avoid the lid from being loosely connected to the chamber during disposal of the waste therefrom.

Abstract: The invention relates to a method for the vertical mixing of gaseous, liquid, powdery and/or pasty products using, for example, a hollow shaft (2) and inner shaft (3) arranged in a housing, whereby paddle-shaped mixing tools (4) are provided on the hollow shaft (2) and on the inner shaft (3) there is provided a discharge device (9) arranged below an outlet (8) of the mixer (1). The mixer (1) is thereby completely filled in the operating state and the product (11) and additives are pressed onto the inner wall of the housing by means of the mixing tools (4). The product flows continuously downwards under the force of gravity and acts against the partly backward-conveying paddles. The continuous product flow is regulated using a rotary slide valve (9) provided at the outlet (8). The mixer (1) is especially suitable as a dosing device and/or for lubicating extruder and/or expander products.

Abstract: A deflector-mixing head for a reaction molding machine, comprises a mixing chamber with a control piston for regulation of component inflow, an overflow chamber is arranged downstream from the mixing chamber in a perpendicular position thereto and provided with a cleaning piston which controls the opening and closing of the mixing chamber side of the inlet of the overflow chamber, wherein an improved mixing quality is obtained by arranging a connection chamber substantially parallel to the axis of the overflow chamber, between the mixing and overflow chambers and provided with deflector elements positioned in the flow path between the inlet and the outlet side of the connecting chamber, and by arranging a displacement piston parallel to the cleaning piston for emptying the connection chamber.

Abstract: A twin shaft “compulsory mixer” having a capacity in the range of twelve cubic yards has a static mixing chamber bottom defined from two horizontally disposed and interfering cylindrical shapes. Two centrally disposed elongate rectilinear discharge gates are each defined from an end in the bottom of the static mixing chamber to abut at the middle of the static mixing chamber. At the middle bottom of the static mixing chamber, a tensioning rod is placed extending normally across the abutted ends of the two rectilinear slots. Two eccentrically mounted elongate rectilinear gates are mounted for movement into and out of sealing relation to the rectilinear slot centrally of the static mixing chamber. These gates are mounted centrally of the mixing chamber to a pillow block and spherical bearing arrangement and actuated at the respective static mixer chamber ends by conventional piston drives. Reducing the gates in length, reduces deflection making chamber sealing possible.

Abstract: A device and a method for producing concrete paving stones. These paving stones can be made from coarse grained concrete and a series of layers of colored concrete material. These layers of colored concrete material are placed in a container on top of a slider that is transversely displaceable. There is also an additional slider and a closing member disposed at the bottom of the container. The first slider, can be moved to form a passage slot between the first slider and the housing. The second slider can be moved to form a passage slot between the second slider and the housing. In addition, between the first slider and the second slider is a first deflecting curve for the colored concrete to mix around and between the second slider and the closing member is a second deflecting curve for further mixing of the colored concrete. This colored concrete is then added to the coarse grained concrete and compacted with it to create paving stones.

Abstract: A twin shaft “compulsory mixer” having a capacity in the range of twelve cubic yards has a static mixing chamber bottom defined from two horizontally disposed and interfering cylindrical shapes. Two centrally disposed elongate rectilinear discharge gates are each defined from an end in the bottom of the static mixing chamber to abut at the middle of the static mixing chamber. At the middle bottom of the static mixing chamber, a tensioning rod is placed extending normally across the abutted ends of the two rectilinear slots. Two eccentrically mounted elongate rectilinear gates are mounted for movement into and out of sealing relation to the rectilinear slot centrally of the static mixing chamber. These gates are mounted centrally of the mixing chamber to a block and spherical bearing arrangement and actuated at the respective static mixer chamber ends by conventional piston drives. Reducing the gates in length, reduces deflection making chamber sealing possible.

Abstract: A chip feeder for feeding chips stored in bulk in a case thereof, one by one, from a chip-supply portion thereof, the chip feeder including a partition plate which parts an inner space of the case into a plurality of rooms, the partition plate having an opening which extends in a direction intersecting a horizontal plane and which communicates the respective rooms on both sides of the partition plate, with each other, a movable partition member which extends across the opening of the partition plate and which is movable relative to the opening in the direction intersecting the horizontal plane, and a movable-partition-member control device which controls the movable partition member so that a lower portion of the movable partition member sinks in an upper portion of a mass of the chips stored in bulk in the case and an upper portion of the movable partition member projects upward from the mass of the chips.

Abstract: A mixer for particulate materials, such as soil, dirt, sand, concrete, lime, fertilizers, aggregate, and water, hitched to a skid steer motor vehicle has a bucket for accommodating the particulate materials. A pair of augers having opposite spiral flights located within the bucket are driven by a hydraulic fluid operated motor to mix the particulate materials. The operator of the vehicle controls the hydraulic motor to reverse the rotational direction of the augers to control the mixing of the particulate materials. A door mounted on the side wall of the bucket is movable with a hydraulic cylinder to an open position to allow the particulate materials to be discharged from the bucket.

Abstract: A continuous mixer (10) comprises an elongated mixing container (11), which has an inlet opening (14) at one end for feeding in the basic components to be mixed and which encloses a mixing space (12), which merges at the other end into a discharge region (22) for the delivery of the mixed product, and in which mixing container (11) there is arranged a mixing tool (13), which is rotatable about an axis (41), is driven by a drive (18, 40) and mixes together the basic components fed into the inlet opening (14) and at the same time transports them to the discharge region (22). In such a mixer, improved control of the mixing conditions is achieved by an adjustable discharge opening (19) adjustable in size being arranged between the discharge region (22) and the mixing space (12).

Abstract: Mixer vehicle is typically a tractor drawn and powered trailer for mixing and distribution of bulk materials such as farm animals feedstuffs. It includes a semi-cylindrical body (10) having a side discharge opening (22) with a single logitudinal agitation rotor (36) centered therein, the rotor having helical sweep bars (40) rotating close to the body wall in at least the body part not occupied by the opening acting as a skeleton auger driving material along the body into its discharge zone, and a lesser diameter return auger (50) in the latter zone acting to return material from that zone so that the material is circulated for mixing. When a door (28) is opened the action of the rotor discharges the material through the opening where it may be further acted on by a faster feed-out rotor (34).

Abstract: A feed mixer apparatus includes a tongue attached to a frame mounted upon a wheeled axle, a forward and rearward mixing chambers separated by a trough, a pair of reels driven by sprockets and gears and drive shafts which are actuated by a power take off on preferably a prime, a plurality of elongate mixing members extending between the side walls of the mixing chambers and deflectably attached to the ends of a plurality of radially-extending arms, an auger being rotatably disposed in the trough and having fins attached thereon for flipping clumps or chunks of feed material back into the chambers, an opening through a side wall in alignment with the trough and through which fine particles of feed material is dispensed to the outside, and a conveyor chute pivotally attached to the side wall in alignment with the opening to facilitate the dispensing of fine particles of feed material to the outside.

Abstract: A horizontal drum concrete batch mixer comprising a cylindrical mixer drum which may be rotated in a mixing direction or a discharge direction. The interior of the drum has mixing blades provided thereon for mixing the concrete when the drum is rotated in its mixing direction. The interior of the drum is also provided with transfer blades which transfer the mixed concrete from the inlet end of the drum to the discharge end of the drum when the drum is rotated in its discharge direction. A discharge chute is movably positioned in the discharge opening formed in the discharge of the drum and is movable from a discharge position to a mixing position. A plurality of spaced-apart discharge blades are secured to the interior of the drum adjacent the discharge end thereof for delivering the mixed material into the discharge chute when the discharge chute is in its discharge position and the drum is rotated in its discharge direction.

Abstract: A horizontal drum concrete batch mixer comprising a cylindrical mixer drum which may be rotated in a mixing direction or a discharge direction. The interior of the drum has mixing blades provided thereon for mixing the concrete when the drum is rotated in its mixing direction. The interior of the drum is also provided with transfer blades which transfer the mixed concrete from the inlet end of the drum to the discharge end of the drum when the drum is rotated in its discharge direction. A discharge chute is movably positioned in the discharge opening formed in the discharge of the drum and is movable from a discharge position to a mixing position. A plurality of spaced-apart discharge blades are secured to the interior of the drum adjacent the discharge end thereof for delivering the mixed material into the discharge chute when the discharge chute is in its discharge position and the drum is rotated in its discharge direction.

Abstract: In the production of molded articles from hot setting plastics with several components, these components are brought together under laminar flow before mixing. An apparatus for such production has a chamber (2) positioned on the back end of a mixer (6), into which feed ducts (3, 4) of the individual components positioned annularly around chamber (2) empty.

Abstract: The discharge outlet is for use with fibrous product mixers of the type which comprise, in a lower region of a lateral wall of a mixing container, a wide opening or discharge outlet at which a movable closure panel is associated. The panel is shaped substantially complementarily to the opening. The discharge outlet has a metal plate flap welded longitudinally to the lower region defined by the base of the container.

Abstract: An apparatus for mixing powder and liquid together continuously comprises a housing (1) which has a conical surface (16), and a rotor (7) which is journalled for rotation in the housing and which has a conical surface (9). The housing has provided therein a liquid inlet (20) through which liquid is delivered to a gap between the conical housing and rotor surfaces, and a powder inlet (12) through which powder is delivered to the upper surface (8a) of the rotor. As the rotor rotates, a liquid film is formed on the conical housing surface while, at the same time, powder is thrown onto the liquid film with the aid of rotor-carried guide vanes (10). The mixture is worked and pressed out through an outlet (30) by wing-like elements (11) carried by the rotor.

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: A method for feeding a solid-liquid mixture comprised of a liquid and a solid having a specific gravity greater than that of the liquid comprising depositing the solid component around a feed opening disposed at the bottom of a mixing container and feeding the solid-liquid mixture to a container for packing the same through the opening is provided and the method can effectively be carried out utilizing an apparatus comprising a mixing container, a feed opening disposed at the bottom of the mixing container, a feed controlling device disposed below or within the feed opening and characterized in that it comprises a collecting device for depositing the solid component of the mixture around the feed opening.

Abstract: An impingement mixing device is provided comprising a mixing chamber housing, a control piston axially displaceable with said mixing chamber housing between an extended position and a retracted position, a mixing chamber within the housing defined by an end face of the control piston when in the retracted position and a mixing chamber discharge outlet coextensive with an end face of said control piston when in the extended position, means to feed first and second components to the mixing chamber in opposing relationship, a discharge tube housing defining a quieting chamber having an opening at a discharge end and in fluid communication with the mixing chamber, with said discharge tube housing including a sealing means adapted to at least partially close the opening of the quieting chamber at the discharge end.

Abstract: The invention relates to a method and apparatus for preparing concrete mortar. In order to regulate the moisture content of the concrete mortar a sand sample is taken of the sand used. This sand sample is dried. The amount of water added to a concrete charge is regulated subject to the weight difference of the sand sample prior to and after drying.

Abstract: A method according to the invention involves continuously moving a mix within a closed vessel having loading and discharge pipes at the ends thereof. The mix is subjected to oscillations during movement by means of a source of oscillations. A gate is provided in the vessel upstream the discharge pipe for contolling the cross-sectional area of the flow path of the vessel and for defining a sealed zone in the vessel with the mix being processed. During movement, the mix is heated to 100.degree. C. and above by passing electric current therein by means of an electrode installed in the vessel. Vapor is thus formed which penetrates the whole body of the mix so as to carry out uniform and rapid heating of all components of the mix.

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: An apparatus for selecting lottery balls each bearing a unique lottery indicia is comprised of a hollow, spherical globe within which an arcuate carrier is turned by a crank. The outwardly facing surface of the carrier follows the contour of the interior surface of the globe and has a radially outwardly directed tripping tooth. A sliding hatch is disposed at the lowest extremity of the globe to move reciprocally to block and unblock a lottery ball outlet. A tang extending radially inwardly from the sliding hatch is engaged by the tripping tooth to open the lottery ball outlet to dispense a lottery ball therefrom. The hatch may be selectively locked to block the lottery ball outlet.

Abstract: An apparatus for removing flowable bulk material from the underside of a bulk-material column includes a container for bulk material conducting gaseous or vaporous media to be scrubbed upward through the column opposite the bulk-material flow for eliminating used filter material; a stationary grating below and spaced from the underside of the column including spaced-apart grid chambers; a first control grate above the grating, spaced from the underside of the column, covering the surface area of the grating, including alternating passage openings and blocking sections corresponding to the spacing of the grid chambers and being displaceable in a first horizontal stroke direction; and a second control grate below the grating, including passage openings and blocking sections and being displaceable axially parallel to the first stroke direction; the passage openings and blocking sections of the first and second control grates being mutually horizontally adjustable for alternately filling a first group of the grid

Abstract: Apparatus for mixing and dispensing feed material particularly for cattle comprises a cylindrical drum which has an inlet in the form of a longitudinal slot along part of the length of the drum which is closable by doors pivoted on the drum. An outlet is formed by a plurality of openings arranged around the drum at a portion thereof spaced from the inlet opening. A sleeve around the drum can be moved to open and close the outlet openings. A belt wrapped around the drum catches material discharged from the drum and feeds is out to one side of the drum. The drum can be mounted upon a vehicle for transportation along a line of receptacles so that rotation of the drum discharges material into the receptacles. The drum is free from inner moving parts or bearings which contact the feed material.

Abstract: An improved construction of a foaming machine, wherein the bottom of the agitator barrel is provided with a lower cover device so that a control gate provided under the bottom of the agitator barrel can be controlled to move to and fro on the support rails of two side rails, thereby the said control gate can be pushed forwards to close the bottom of the agitator barrel or moved backwards to open the bottom of the agitator barrel. A driving mechanism can control the mixture receiving mold under the agitator barrel so that the latter can be lifted or lowered to effectively reduce the laying down distance between the mold and the agitator barrel. Thus the ununiform bubbles occurred while laying down the mixture by swinging away the lower cover of the agitator barrel in the known foaming machine can be avoided.

Abstract: A pin mixer for mixing particulate solids having a rotor with a plurality of radially extending pins removably attached thereto. The pins form a plurality of axially and angularly staggered helices along the rotor, and pins adjacent the inlet of the mixer are interconnected by a solid ribbon. Adjustable fluid nozzles are provided in the inlet for mixing fluids with the solid particulate material. The pin mixer has a pair of bearings, a pair of seals located inwardly from the bearings, and a pair of discs attached to the rotor thereof. A first pressure source may be connected between each bearing and seal to assure that leakage across the seals is away from the bearings, and a second pressure source connected between each seal and respective disc so that leakage between the disc and shell is away from the seals. The rotor has a pair of detachable stub shafts, and a means is provided to quickly change the rotor and shell without disturbing the connection to the power source.

Abstract: A mixing chamber silo is described for loose material with a mixing chamber on the silo floor and with a passage between the central mixing compartment and the outer wall of the silo through which the mixed loose material is removed. The passage has a dividing wall between the central mixing compartment and a conduit under the chamber ceiling. Only mixed loose material passes through this opening to conduit and then to the removal outlet. There is no direct connection from the silo area to the removal outlet.

Abstract: A mixing head for two reactive components has a mixing chamber provided with a control plunger enabling recirculation and opening at right angles into a quieting passage which is provided with a control plunger adapted to selectively obstruct the outlet of the mixing chamber into the quieting passage. According to the invention an adjustable abutment is provided for the latter plunger to enable the obstruction to be completely removed during one phase of each cycle of the actuation of the apparatus. This abutment can be an annular piston under the control of fluid pressure.

Abstract: An apparatus comprising a housing with a guide bore in which an expulsion plunger can move to and fro, a portion of the guide bore constituting a mixing chamber which is bounded by the end face of the free end of the plunger and by two nozzle bodies which can be slidingly introduced into the guide bore. The plastics components flow, via inlet channels, through the nozzle bodies into the mixing chamber, the corresponding inlet orifices in the nozzle bodies being exposed during the stroke of these bodies. The end faces of the nozzle bodies constitute a restrictor in the form of an adjustable gap, which gap represents the outlet orifice of the mixing chamber and causes additional mixing of the plastics components. Using the apparatus, constant and good intensity of mixing is attainable, over the entire injection cycle, when processing two reactive plastics components.

Abstract: Access to a cement metering wheel for purposes of cleaning, without spilling cement from a storage tank disposed above the metering wheel, is provided by pivoting the wheel assembly downward and away from the bottom of the tank. A gate slot in the bottom of the tank is adapted to receive one or more blocking plates, prior to pivoting the wheel assembly, so as to block the gravity-feed outflow opening from the tank. Selectively removable slot covers are provided to prevent cement spillage from the open side of the slot during normal cement metering operation.

Abstract: The instant invention is directed to a mixing head for mixing at least tw flowable components which preferably form a foam during their reaction. The mixing head comprises a housing, in which a guide bore for a discharge piston is positioned, one section of this guide bore being designed as a mixing chamber, into which nozzle openings of injection members, positioned equidistant around the housing, discharge. In the mixing position of the discharge piston, the mixing chamber is bounded by the leading edge of the piston, with an outlet opening being provided opposite the piston. A choke member, which adjoins the mixing chamber and is movably positioned in a guide recess extending perpendicular to the guide bore and transversely beyond the axis or plane of the injection members, has a passage, the cross section of which corresponds to the cross section of the discharge piston such that the piston may enter this passage in its cleaning position.

Abstract: An apparatus and method for treating for disposal organic waste material carried within a sludge, by adding to the sludge an alkali metal silicate and a setting agent, is disclosed. The apparatus includes several mixers, each having a trough with an input end and a discharge end, at least one rotatable shaft mounted longitudinally along the trough, a plurality of blades mounted to the shaft, and a drive for rotating the shaft. The sludge is deposited within a first mixer, and then directed from the mixer into a tank. A series of chopper pumps recirculate the sludge into the tank, and alternatively, the sludge may be passed through an additional mixer. Leaving the tank, the sludge is directed into a second mixer at its input end. Water is introduced at the input end, and a setting agent is added along the trough at a point adjacent the input end. Further along the trough, an alkali metal silicate is introduced. The mixture is recovered from the second mixer, and carried to a remote location for setting.

Abstract: A mixing head for two reactive components forms a mixture in a mixing chamber when a control plunger is retracted, the mixture passing into a channel at right angles to the mixing chamber. A second plunger in the channel is partially retracted so that its free end is positioned in line with the opening to form a partial obstruction around which the mixture is formed. Then the second plunger is retracted to allow clearing of residues, and advanced to drive residues from the channel.

Abstract: A mixer having an open top mixing box accommodating a pair of lower augers and a pair of upper paddle conveyors drivably connected to the augers. A power box pivotally mounted on one end of the mixing box is drivably connected to the augers with releasable drive connections. The power box is a motor driven power transmission assembly that can be disconnected from the augers and removed from the mixing box. A movable door associated with the bottom of the mixing box is used to selectively open and close a discharge opening allowing mixed and blended material to be discharged into a conveyor.

Abstract: A mixing device for preparing wet mix cementitious products comprised of large aggregates includes a pair of generally tubular, horizontally disposed casings which form a mixing chamber, and which share common, open sides. An open top of the chamber receives raw materials to be mixed. Elongated central impeller shafts extend longitudinally, generally coaxially within each of the casings, rotatably terminating in appropriate bearings. A pump impeller assembly removably mounted to each of the impeller shafts includes rigid, spaced-apart spiders having three, integral, radially spaced-apart outwardly extending arm segments. The spider arm segments support a pair of spiralled, spaced-apart mixing rods.