EP0297099B1 - Blending particulate materials - Google Patents
Blending particulate materials Download PDFInfo
- Publication number
- EP0297099B1 EP0297099B1 EP19870901545 EP87901545A EP0297099B1 EP 0297099 B1 EP0297099 B1 EP 0297099B1 EP 19870901545 EP19870901545 EP 19870901545 EP 87901545 A EP87901545 A EP 87901545A EP 0297099 B1 EP0297099 B1 EP 0297099B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elongate member
- conveying means
- blending
- conveying
- stirring members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000002156 mixing Methods 0.000 title claims abstract description 36
- 239000011236 particulate material Substances 0.000 title claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims description 19
- 230000002596 correlated effect Effects 0.000 claims description 2
- 239000011295 pitch Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000000230 xanthan gum Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
- 229940082509 xanthan gum Drugs 0.000 description 1
- 235000010493 xanthan gum Nutrition 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
- B28C5/1246—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with feeding devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
- B01F27/1145—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections ribbon shaped with an open space between the helical ribbon flight and the rotating axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
- B01F27/1145—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections ribbon shaped with an open space between the helical ribbon flight and the rotating axis
- B01F27/11451—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections ribbon shaped with an open space between the helical ribbon flight and the rotating axis forming open frameworks or cages
Definitions
- This invention is concerned with a device for blending a mixture of particulate materials.
- FR-A-2321319 discloses mixing apparatus particularly designed for building materials in which a helical rotor is rotated within a cylindrical casing to agitate and convey in-fed materials towards an outlet.
- the rotors disclosed have a cage of rods surrounded by a helical flight which is flat on the side thereof facing the conveying direction.
- What constitutes the invention is set out in the following claim 1 and is characterised by the cross-section of the elongate member in the conveying means of the blending device being of arcuate form at least on the side thereof facing the conveying direction of the conveying means, and the stirring members being located on the outside of the respective helical turns of the elongate member.
- the pitch of the helically formed member is constant throughout its length and the elongate member is desirably of circular cross-section.
- some of the stirring members are also located on the inside of the respective helical turns (i.e. between those turns and the axis of rotation of the conveying means).
- the stirring members can, with advantage, be disposed parallel to the axis of the conveying means and an aligned series of stirring members extending from end to end of the conveying means can be provided by a single bar, rod or wire extending from the first turn to the last turn of the helically formed member.
- Conveniently stirring members extending the full length of the helically formed member alternate in being secured inside and outside the helical turns.
- the metering means can conveniently each also comprise a respective conveying means formed from an elongate member of at least part- arcuate cross-section helically disposed and mounted for rotation about its helical axis.
- the conveying means in each metering conveying means is designed to run at a slower speed (e.g. one tenth of the speed of the blending conveying means) in a casing containing particulate material to a depth completely covering each turn of the elongate member at least at the inlet end of the metering conveying means.
- the amount of material dispensed from each metering conveying means into the blending means can be adjusted by varying the speed of rotation and/or the pitch of the elongate member forming the conveying means.
- a blending device may be used not only to blend the particulate materials, but also to blend a dosed minor proportion of liquid inert to the other components of the blend.
- 'inert' is meant both chemically and physically inert including at least to the extent that it is not a solvent for any solid component of the blend.
- the blending conveying means not only blends the components fed to it at its upstream end but conveys the mixture of particulate materials to the downstream end of the conveying means from whence it is discharged as a well blended mixture.
- a cross-section of at least part arcuate form for the elongate member of the conveying means is important to the blending process.
- a flat surface of the elongate member is presented in the conveying direction (e.g. a member of rectangular cross-section is used)
- the material is liable to pack between the helical turns and the relative movement of the particules during their conveyance along the helical member, necessary to making a thorough blend, is inhibited.
- each of the plurality of metering means also comprises a conveying helix in a casing
- the elongate members forming these helices may be of any convenient cross-sectional shape (e.g. of flat, rectangular or round section).
- the helical conveying means may be driven at correlated speeds to deliver appropriate proportions of particulate materials, or the pitches of the helices may be varied and all conveying means driven at similar speeds of rotation to achieve the same purpose.
- a component is required to form only a small proportion of a final blend
- Two streams of blended particulate materials may be obtained from a blending device in which the helix of the conveying means changes hand mid-way along its length.
- a helical conveying means having only one drive but receiving metered materials onto each different handed length adjacent to the centre of the length delivers two blends, one from each end of the helical conveying means.
- the blending device 10 shown in Figure 1 basically comprises an inefficient helical conveying means 12 moving particulate materials (with a great deal of "fall back” and “tumbling” in a blending section 13) from an input hopper 14 (via an input section 15) to a discharge chute 16 (via an output section 17).
- the section 13 of the conveying means 12 should be several times as long as the section 15 (typically between five and ten times as long).
- the conveying means 12 comprises an elongate member 18 of circular cross-section wrapped helically at constant pitch about a central drive shaft 19. At intervals along its length, the member 18 is braced to the shaft 19 by radial arms 20. A drive wheel 21 is mounted on one end of the shaft 19 so that, in use of the blending device, the shaft 19 rotates (typically at a speed in the range 100 to 150 rpm) in the direction shown by the arrow 22.
- the conveying means 12 is embraced throughout its length by a casing 23 which matches the cross-section of the lower half of the conveying means 12 and supports the particulate materials being blended in a region where they are continually disturbed by the rotating turns of the member 18.
- the depth of the layer of particulate material over the blending section 13 will be between one and two times the diameter of the cross-section of the member 18 (i.e. the lower part only of each turn of the helix is covered by the particulate material being blended).
- stirring members are arranged between adjacent turns of the helix so that these are periodically moved through the shallow bed of material being conveyed towards the chute 16.
- the stirring means can be rods (or wires) 25a, 25b extending parallel to the axis of the shaft 19 at least over the blending section 13 and conveniently over all three sections 13, 15 and 17.
- One rod 25a can be located between turns inside each turn and the next rod 25b can be located between turns outside each turn.
- the rods 25a, 25b can be attached (eg welded) to each turn or to just some of the turns as may be required to give a stable structure.
- Figure 2 shows a section on the line II-II of Figure 1 and indicate the open-topped nature of the casing 23.
- Figure 1 shows three metering means 26a, 26b and 26c for feeding three different components of a mixture which is to be blended in the illustrated device 10. Any suitable means for supplying an accurately controlled rate of flow of material can be used but it is preferable to use in each metering means a similar conveying means to that shown at 12 in Figure 1.
- FIGS 3 and 4 show such an arrangement in which two main metering conveyors 26A, 26B are combined with four secondary metering conveyors 26C-26F.
- Hoppers 27A to 27F are provided above each conveyor and contain enough material to cover the turns of the respective conveying means at all times during use of the arrangement.
- Each conveyor 26A to 26F discharges its output into the hopper 14 of the blending device 10, the conveyors 26C-26F discharging into a downwardly converging duct 28 which opens into the hopper 14. Since the secondary metering conveyors 26C-26F are intended to feed minor proportions of the ingredients of the mixture blended in the device 10, they can be of shorter length and smaller diameter than the conveyors 26A and 26B intended to meter major components of the blend.
- Each metering conveyor 26A-26F and the blending conveying means can be driven from a single prime mover (e.g. an electric motor).
- a prime mover e.g. an electric motor
- gearboxes of variable ratio can be used as can chain and sprocket drives or toothed wheel and toothed belt drives.
- varying the pitch of the helical turns of any given metering conveyor is a very useful way of fine tuning the metering rate at which it delivers its component to the blending device and accordingly each metering conveyor can be constructed as shown in the scrap section of Figure 5.
- any radial supports (e.g. the arms 20) of the helically disposed member and any stirring members (25a, 25b) provided must be arranged to accommodate the slight axial movement made by each turn of the helix when the plate 30 is axially adjusted.
- a rod forming a stirring member could be fixedly secured at one end to a turn of the helix and slidably mounted at all other turns.
- the blending conveying means could include a construction such as shown in Figure 5 but it is not necessary to provide such a pitch adjustment facility in the blending device.
- a sliding device can be used in place of the threaded arrangement 30-32 to provide for helix pitch adjustment.
- the arrangement shown in Figures 3 and 4 can also be used to add small volumes of liquid (e.g. a liquid surfactant) to a mixture of ingredients to be blended and an inlet region for such a liquid is indicated at 33 in Figure 3.
- liquid surfactant e.g. a liquid surfactant
- a 1% v/v addition of liquid surfactant has been found to provide "particle coating" of the blended mixture.
- the blending device 10 may be specifically arranged to ensure back mixing of the particulate materials e.g. it may be inclined upwardly towards the discharge end thereof and/orfitted with contra- wound helix sections.
- a mixture of xanthan gum powder and sodium carboxy methyl cellulose particles fed to the hopper 14 of the device 10 in the proportion of 10:1 was found to be blended by the device to an accuracy of ⁇ 1% over six random samples of the blend.
- the metering conveyors 26C-26F were each variable pitch helices of 51 mm (2 inches) diameter of 3.2 mm (1/8 inch) diameter round section rod of 9.5 mm (3/8 inch) pitch and the conveyors 26A, 26B were of variable pitch helices of 200 mm (8 inches) diameter of 9.5 mm (3/8 inch) diameter round section rod at 63.5 mm (2-1/2 inch) pitch.
- the elongate member 18 in the blending device 10 was of the same size, pitch and rod diameter as the conveyors 26A, 26B but was of fixed pitch.
- the overall length of the blending device was some 2000 mm.
- Figure 6 shows some suitable cross-sectional shapes for the member 18 of the blending device.
- the section 40 is circular, the sections 41 and 42 elliptical, and the sections 43 to 45 part arcuate with a flat section facing away from the conveying direction 24.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
Abstract
Description
- This invention is concerned with a device for blending a mixture of particulate materials.
- Many of industries have a requirement for a blended mixture of particulate materials containing accurate and reproducible proportions of the materials. The food, chemical, pharmaceutical, agricultural and horticultural industries at least have such requirements.
- FR-A-2321319 discloses mixing apparatus particularly designed for building materials in which a helical rotor is rotated within a cylindrical casing to agitate and convey in-fed materials towards an outlet. The rotors disclosed have a cage of rods surrounded by a helical flight which is flat on the side thereof facing the conveying direction.
- What constitutes the invention is set out in the following
claim 1 and is characterised by the cross-section of the elongate member in the conveying means of the blending device being of arcuate form at least on the side thereof facing the conveying direction of the conveying means, and the stirring members being located on the outside of the respective helical turns of the elongate member. - Conveniently the pitch of the helically formed member is constant throughout its length and the elongate member is desirably of circular cross-section. Conveniently some of the stirring members are also located on the inside of the respective helical turns (i.e. between those turns and the axis of rotation of the conveying means). The stirring members can, with advantage, be disposed parallel to the axis of the conveying means and an aligned series of stirring members extending from end to end of the conveying means can be provided by a single bar, rod or wire extending from the first turn to the last turn of the helically formed member. Conveniently stirring members extending the full length of the helically formed member alternate in being secured inside and outside the helical turns.
- The metering means can conveniently each also comprise a respective conveying means formed from an elongate member of at least part- arcuate cross-section helically disposed and mounted for rotation about its helical axis.
- Whereas the helically formed member of the conveying means of the blending device is designed to run at high speed in a casing containing particulate material to a depth of not much more than that required to cover the lower part of each turn of the elongate member, the conveying means in each metering conveying means is designed to run at a slower speed (e.g. one tenth of the speed of the blending conveying means) in a casing containing particulate material to a depth completely covering each turn of the elongate member at least at the inlet end of the metering conveying means. The amount of material dispensed from each metering conveying means into the blending means can be adjusted by varying the speed of rotation and/or the pitch of the elongate member forming the conveying means.
- A blending device according to the invention may be used not only to blend the particulate materials, but also to blend a dosed minor proportion of liquid inert to the other components of the blend. By 'inert' is meant both chemically and physically inert including at least to the extent that it is not a solvent for any solid component of the blend. It will be appreciated that the blending conveying means not only blends the components fed to it at its upstream end but conveys the mixture of particulate materials to the downstream end of the conveying means from whence it is discharged as a well blended mixture.
- The provision of a cross-section of at least part arcuate form for the elongate member of the conveying means is important to the blending process. When a flat surface of the elongate member is presented in the conveying direction (e.g. a member of rectangular cross-section is used), it has been found that the material is liable to pack between the helical turns and the relative movement of the particules during their conveyance along the helical member, necessary to making a thorough blend, is inhibited.
- Where each of the plurality of metering means also comprises a conveying helix in a casing, the elongate members forming these helices may be of any convenient cross-sectional shape (e.g. of flat, rectangular or round section). The helical conveying means may be driven at correlated speeds to deliver appropriate proportions of particulate materials, or the pitches of the helices may be varied and all conveying means driven at similar speeds of rotation to achieve the same purpose.
- Where a component is required to form only a small proportion of a final blend, it can be desirable to meter such a component using a smaller diameter helix for the conveying means (and a correspondingly smaller casing) compared with that used to deliver a or the major component(s) of the blend, rather than rely solely on employing different speeds of rotation or different pitches of similarly sized helices.
- Two streams of blended particulate materials may be obtained from a blending device in which the helix of the conveying means changes hand mid-way along its length. Such a helical conveying means having only one drive but receiving metered materials onto each different handed length adjacent to the centre of the length delivers two blends, one from each end of the helical conveying means.
- The invention will be further described by way of example, with reference to the accompanying drawings, in which
- Figure 1 is a sectional side elevation of a first embodiment of blending device made in accordance with the invention;
- Figure 2 is a transverse sectional view of the blending device of Figure 1 taken on the line II-II of Figure 1,
- Figure 3 is a schematic side elevation of an arrangement embodying six metering devices and the blending device of Figure 1,
- Figure 4 is an end view of the arrangement shown in Figure 3,
- Figure 5 is a scrap view showing how an adjustable pitch of a conveying helix can be arranged, and
- Figure 6 shows some suitable cross-sections for the elongate member forming a conveying means of a blending device.
- The
blending device 10 shown in Figure 1 basically comprises an inefficient helical conveying means 12 moving particulate materials (with a great deal of "fall back" and "tumbling" in a blending section 13) from an input hopper 14 (via an input section 15) to a discharge chute 16 (via an output section 17). Thesection 13 of the conveying means 12 should be several times as long as the section 15 (typically between five and ten times as long). - The conveying means 12 comprises an
elongate member 18 of circular cross-section wrapped helically at constant pitch about acentral drive shaft 19. At intervals along its length, themember 18 is braced to theshaft 19 byradial arms 20. Adrive wheel 21 is mounted on one end of theshaft 19 so that, in use of the blending device, theshaft 19 rotates (typically at a speed in the range 100 to 150 rpm) in the direction shown by thearrow 22. - The
conveying means 12 is embraced throughout its length by acasing 23 which matches the cross-section of the lower half of theconveying means 12 and supports the particulate materials being blended in a region where they are continually disturbed by the rotating turns of themember 18. In practice the depth of the layer of particulate material over theblending section 13 will be between one and two times the diameter of the cross-section of the member 18 (i.e. the lower part only of each turn of the helix is covered by the particulate material being blended). - To increase the agitation and tumbling of the particulate material in the
casing 23 as it is conveyed in the direction of thearrow 24, stirring members are arranged between adjacent turns of the helix so that these are periodically moved through the shallow bed of material being conveyed towards thechute 16. As shown in Figure 1 the stirring means can be rods (or wires) 25a, 25b extending parallel to the axis of theshaft 19 at least over theblending section 13 and conveniently over all threesections rod 25a can be located between turns inside each turn and the next rod 25b can be located between turns outside each turn. Therods 25a, 25b can be attached (eg welded) to each turn or to just some of the turns as may be required to give a stable structure. Figure 2 shows a section on the line II-II of Figure 1 and indicate the open-topped nature of thecasing 23. - Figure 1 shows three metering means 26a, 26b and 26c for feeding three different components of a mixture which is to be blended in the illustrated
device 10. Any suitable means for supplying an accurately controlled rate of flow of material can be used but it is preferable to use in each metering means a similar conveying means to that shown at 12 in Figure 1. - Figures 3 and 4 show such an arrangement in which two
main metering conveyors secondary metering conveyors 26C-26F.Hoppers 27A to 27F are provided above each conveyor and contain enough material to cover the turns of the respective conveying means at all times during use of the arrangement. Eachconveyor 26A to 26F discharges its output into thehopper 14 of theblending device 10, theconveyors 26C-26F discharging into a downwardly convergingduct 28 which opens into thehopper 14. Since thesecondary metering conveyors 26C-26F are intended to feed minor proportions of the ingredients of the mixture blended in thedevice 10, they can be of shorter length and smaller diameter than theconveyors - Each
metering conveyor 26A-26F and the blending conveying means can be driven from a single prime mover (e.g. an electric motor). To provide different rotational speeds for the different conveyors, gearboxes of variable ratio can be used as can chain and sprocket drives or toothed wheel and toothed belt drives. However, in practice it has been found that varying the pitch of the helical turns of any given metering conveyor is a very useful way of fine tuning the metering rate at which it delivers its component to the blending device and accordingly each metering conveyor can be constructed as shown in the scrap section of Figure 5. With this arrangement one end of the helically disposed rod (18) can be moved axially with respect to the shaft (19) by an end plate 30 and a nut 31 screw-threaded onto a tappedend 32 of the shaft. If the arrangement shown in Figure 5 is used, any radial supports (e.g. the arms 20) of the helically disposed member and any stirring members (25a, 25b) provided must be arranged to accommodate the slight axial movement made by each turn of the helix when the plate 30 is axially adjusted. Thus a rod forming a stirring member could be fixedly secured at one end to a turn of the helix and slidably mounted at all other turns. The blending conveying means could include a construction such as shown in Figure 5 but it is not necessary to provide such a pitch adjustment facility in the blending device. A sliding device can be used in place of the threaded arrangement 30-32 to provide for helix pitch adjustment. - The arrangement shown in Figures 3 and 4 can also be used to add small volumes of liquid (e.g. a liquid surfactant) to a mixture of ingredients to be blended and an inlet region for such a liquid is indicated at 33 in Figure 3. A 1% v/v addition of liquid surfactant has been found to provide "particle coating" of the blended mixture.
- The
blending device 10 may be specifically arranged to ensure back mixing of the particulate materials e.g. it may be inclined upwardly towards the discharge end thereof and/orfitted with contra- wound helix sections. - A mixture of xanthan gum powder and sodium carboxy methyl cellulose particles fed to the
hopper 14 of thedevice 10 in the proportion of 10:1 was found to be blended by the device to an accuracy of ±1% over six random samples of the blend. - In a typical example of an apparatus according to Figures 3 and 4-the
metering conveyors 26C-26F were each variable pitch helices of 51 mm (2 inches) diameter of 3.2 mm (1/8 inch) diameter round section rod of 9.5 mm (3/8 inch) pitch and theconveyors elongate member 18 in theblending device 10 was of the same size, pitch and rod diameter as theconveyors - Figure 6 shows some suitable cross-sectional shapes for the
member 18 of the blending device. Thesection 40 is circular, thesections sections 43 to 45 part arcuate with a flat section facing away from theconveying direction 24.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87901545T ATE60273T1 (en) | 1986-02-27 | 1987-02-20 | PARTICULATE MIXTURE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8604811 | 1986-02-27 | ||
GB868604811A GB8604811D0 (en) | 1986-02-27 | 1986-02-27 | Metering device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0297099A1 EP0297099A1 (en) | 1989-01-04 |
EP0297099B1 true EP0297099B1 (en) | 1991-01-23 |
Family
ID=10593737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19870901545 Expired - Lifetime EP0297099B1 (en) | 1986-02-27 | 1987-02-20 | Blending particulate materials |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0297099B1 (en) |
JP (1) | JPS63502493A (en) |
FI (1) | FI883919A0 (en) |
GB (1) | GB8604811D0 (en) |
WO (1) | WO1987005255A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104210023A (en) * | 2014-08-27 | 2014-12-17 | 郑旭 | Efficient concrete mixer |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8918512D0 (en) * | 1989-08-14 | 1989-09-20 | Pharmakopius Ltd | Improved mixing apparatus and method |
US5320861A (en) * | 1992-01-03 | 1994-06-14 | Ocean Spray Cranberries, Inc. | Fruit extraction and infusion |
DE69908592T2 (en) * | 1999-09-16 | 2003-12-11 | The Japan Steel Works, Ltd. | Continuous mixing and feeding device |
JP7007708B2 (en) * | 2017-10-10 | 2022-01-25 | 関西産業株式会社 | Dryer |
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US2538891A (en) * | 1948-02-19 | 1951-01-23 | Hoge Warren Zimmerman Co | Continuous mixing and delivering apparatus |
FR1062514A (en) * | 1951-04-25 | 1954-04-23 | Lauterberger Blechwarenfabrik | Mixer |
FR1397988A (en) * | 1964-03-23 | 1965-05-07 | Cie Francaise Des Prod Chim Sh | Improvements to agitator devices for mixing tanks |
FR2264640A1 (en) * | 1974-03-19 | 1975-10-17 | Missioux Jean Leon | Machine for mixing and applying plaster - uses feed screw with variable pitch and radial or axial mixing bars |
GB1553196A (en) * | 1975-08-20 | 1979-09-26 | London Brick Buildings Ltd | Mixer for and method of mixing particulate constituents |
US4071226A (en) * | 1976-11-16 | 1978-01-31 | Miller Charles R | Portable concrete proportioning mixer |
GB2060421B (en) * | 1979-10-16 | 1983-03-16 | Hamptons Aercrete Ltd | Mixing and conveying apparatus |
GB2090761B (en) * | 1981-01-06 | 1984-12-12 | Power Sprays Ltd | Mixing apparatus |
JPS588330A (en) * | 1981-07-07 | 1983-01-18 | Nec Corp | Switching power supply controlling circuit |
JPS5924340U (en) * | 1982-08-09 | 1984-02-15 | アルプス電気株式会社 | type wheel |
JPS5945411A (en) * | 1982-09-07 | 1984-03-14 | Toshiba Corp | Display device of automatic focus detection of camera |
JPS6017569A (en) * | 1983-07-11 | 1985-01-29 | Yokogawa Hokushin Electric Corp | Method and device for painting out of closed area |
DE3347417A1 (en) * | 1983-12-29 | 1985-07-11 | Georg 8550 Forchheim Badum | DEVICE FOR STORING, DOSING AND MIXING MORTAR MATERIAL COMPONENTS AND METHOD FOR OPERATING THE DEVICE |
-
1986
- 1986-02-27 GB GB868604811A patent/GB8604811D0/en active Pending
-
1987
- 1987-02-20 WO PCT/GB1987/000126 patent/WO1987005255A1/en active IP Right Grant
- 1987-02-20 EP EP19870901545 patent/EP0297099B1/en not_active Expired - Lifetime
- 1987-02-20 JP JP62501297A patent/JPS63502493A/en active Pending
-
1988
- 1988-08-24 FI FI883919A patent/FI883919A0/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104210023A (en) * | 2014-08-27 | 2014-12-17 | 郑旭 | Efficient concrete mixer |
CN104210023B (en) * | 2014-08-27 | 2016-05-18 | 郑旭 | A kind of high-effective concrete mixer |
Also Published As
Publication number | Publication date |
---|---|
WO1987005255A1 (en) | 1987-09-11 |
JPS63502493A (en) | 1988-09-22 |
EP0297099A1 (en) | 1989-01-04 |
FI883919A (en) | 1988-08-24 |
FI883919A0 (en) | 1988-08-24 |
GB8604811D0 (en) | 1986-04-03 |
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