NO131409B - - Google Patents
Download PDFInfo
- Publication number
- NO131409B NO131409B NO3021/73A NO302173A NO131409B NO 131409 B NO131409 B NO 131409B NO 3021/73 A NO3021/73 A NO 3021/73A NO 302173 A NO302173 A NO 302173A NO 131409 B NO131409 B NO 131409B
- Authority
- NO
- Norway
- Prior art keywords
- starch
- slot
- slurry
- fibres
- feeding
- Prior art date
Links
- 229920002472 Starch Polymers 0.000 claims description 11
- 239000008107 starch Substances 0.000 claims description 10
- 235000019698 starch Nutrition 0.000 claims description 10
- 239000007900 aqueous suspension Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000002002 slurry Substances 0.000 description 11
- 239000002657 fibrous material Substances 0.000 description 5
- 239000008187 granular material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D27/00—Cartridge filters of the throw-away type
- B01D27/04—Cartridge filters of the throw-away type with cartridges made of a piece of unitary material, e.g. filter paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D27/00—Cartridge filters of the throw-away type
- B01D27/04—Cartridge filters of the throw-away type with cartridges made of a piece of unitary material, e.g. filter paper
- B01D27/06—Cartridge filters of the throw-away type with cartridges made of a piece of unitary material, e.g. filter paper with corrugated, folded or wound material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D27/00—Cartridge filters of the throw-away type
- B01D27/08—Construction of the casing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0654—Support layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0668—The layers being joined by heat or melt-bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0672—The layers being joined by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/065—More than one layer present in the filtering material
- B01D2239/0681—The layers being joined by gluing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1216—Pore size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/12—Special parameters characterising the filtering material
- B01D2239/1291—Other parameters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- External Artificial Organs (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Filtering Materials (AREA)
- Filtration Of Liquid (AREA)
- Paper (AREA)
Description
Anordning for jevn og uhindret matning av sikter og klassifiseringsgitre med vandige suspensjoner av stivelse og fibre. Device for uniform and unimpeded feeding of sieves and classification grids with aqueous suspensions of starch and fibres.
Oppfinnelsen angår en anordning for jevn The invention relates to a device for leveling
og uhindret matning av sikter og klassifiseringsgitre med vandige suspensjoner av stivelse og fibre. and unimpeded feeding of sieves and classification grids with aqueous suspensions of starch and fibres.
Anordningen kan brukes ved separering The device can be used for separation
av stivelse fra fibermateriale som begge inne-holdes i og føres med av oppslemmingen eller of starch from fiber material which is both contained in and carried along by the slurry or
vannsuspensjonen. the water suspension.
Anordningen ifølge oppfinnelsen karak-teriseres ved en tilførselsanordning hvis nedre The device according to the invention is characterized by a supply device whose lower
vegg er tilnærmet i flukt med sikten eller gitterflaten og hvis øvre vegg er dannet av en wall is approximately flush with the screen or grating surface and whose upper wall is formed by a
reguleringsplate, som er festet til en svingbar control plate, which is attached to a swivel bar
aksel, som har en arm med en motvekt som axle, which has an arm with a counterweight which
er anordnet på utsiden av tilføringsanordnin-gen og som trykker den øvre veggen mot den is arranged on the outside of the supply device and which presses the upper wall against it
nedre veggen for å variere tverrsnittet av lower wall to vary the cross-section of
åpningen. the opening.
Anordningen ifølge oppfinnelsen omfatter The device according to the invention comprises
videre en til siden rettet rørformet del med further a side-directed tubular part with
et antall ledeplater eller skovler som oppdeler a number of baffles or vanes that divide
materialstrømmen og fordeler oppslemmingen the material flow and distributes the slurry
i skovlens lengderetning. in the longitudinal direction of the blade.
Ved utvinning av stivelse av vegetabilsk In the extraction of vegetable starch
materiale bestående av stivelsesgranuler, f. material consisting of starch granules, e.g.
eks. gjennombløtt korn fra hvilket man har e.g. soaked grain from which one has
fjernet spirene, får man en oppslemming eller removed the sprouts, you get a slurry or
en annen suspensjon innholdende stivelsesgranuler og fibrer ved å male det vegetabilske another suspension containing starch granules and fibers by grinding the vegetable
produkt, fra hvilken oppslemming stivelses-granulene vaskes ut på sikter. Disse sikter product, from which slurry the starch granules are washed out on sieves. These aims
kan ha forskjellig utformning. I henhold til may have different designs. According to
den klassiske metode brukes flate rystesikter, the classic method uses flat vibrating sieves,
men i nyere tid har man foreslått sikteappa-ter med buede sikteflater langs hvilke opp- but in recent times, aiming devices with curved aiming surfaces along which the
slemmingen transporteres under trykk. I ,disse siktapparater innføres oppslemmingen som inneholder stivelsesgranuler og fibre, i siktene gjennom en matningssliss som bevirker en jevn spredning av oppslemmingen over hele bred-den av sikten. I praksis blir imidlertid slissen som mates fra siden eller fra sidene tilstoppet med fibermaterialet og som følge derav må sikteprosessen temmelig ofte avbrytes for å rense siktens matningssliss. the slurry is transported under pressure. In these sieving devices, the slurry containing starch granules and fibers is introduced into the sieves through a feed slot which causes an even spread of the slurry over the entire width of the sieve. In practice, however, the slot that is fed from the side or from the sides becomes clogged with the fiber material and, as a result, the screening process must be interrupted quite often to clean the screen's feeding slot.
Det er nå funnet at denne ulempe kan fullstendig overvinnes ved å la den øvre side av matningsslissen bestå av den nedre side av en svingbar reguleringsventil som utøver et mottrykk på den innførte oppslemming. It has now been found that this disadvantage can be completely overcome by allowing the upper side of the feed slot to consist of the lower side of a pivotable control valve which exerts a back pressure on the introduced slurry.
Man har overraskende funnet at når man bruker en reguleringsventil som utøver mottrykk på den transporterte oppslemming, får man i det vesentlige ingen avsetting av fibermaterialet. It has surprisingly been found that when a control valve is used which exerts back pressure on the transported slurry, essentially no deposition of the fiber material is obtained.
Størrelsen av det utøvede mottrykk kan varieres. I henhold til oppfinnelsen bruker man en reguleringsventil som fritt kan svinges ved at den er lagret på en aksel forsynt med en belastet vektarm. The size of the exerted back pressure can be varied. According to the invention, a control valve is used which can be freely pivoted by the fact that it is mounted on a shaft provided with a loaded weight arm.
Et ytterligere trekk ved oppfinnelsen omfatter bruk av midler som fordeler strømmen i slissens lengderetning. Dette kan gjøres ved å bruke en matningsledning som er anordnet i slissens lengderetning og som munner ut sideveis i slissen. Da det derved i virkelig-heten dannes et kne med en tendens for ujevn strømming langs slissens lengde, kan man bruke en rekke av skovler for å fordele strøm-men langs slissens lengde. A further feature of the invention comprises the use of means which distribute the current in the longitudinal direction of the slot. This can be done by using a feed line which is arranged in the longitudinal direction of the slot and which opens laterally into the slot. As this in reality creates a knee with a tendency for uneven flow along the length of the slot, a series of vanes can be used to distribute the flow along the length of the slot.
Oppfinnelsen vil nå nærmere forklares på grunnlag av et utførelseseksempel og under henvisning til vedlagte tegninger hvor: Fig. 1 er et vertikalsnitt langs linjen 1—1 på fig. 2 av anordningen ifølge oppfinnelsen hvor suspensjonen av fibermaterialet som skal siktes mates til sikten. Fig. 2 er et horisontalsnitt langs linjen 2—2 på fig. 1. The invention will now be explained in more detail on the basis of an embodiment and with reference to the attached drawings where: Fig. 1 is a vertical section along the line 1-1 in fig. 2 of the device according to the invention where the suspension of the fiber material to be sieved is fed to the sieve. Fig. 2 is a horizontal section along the line 2-2 in fig. 1.
Som vist på fig. 1 og 2, innføres en suspensjon av fibermateriale gjennom ledningen 1. Gjennom stasjonært anordnede ledeplater 2, 3, 4 som regulerer fordelingen i slissens lengderetning, mates materialet til matningsslissen og sikten 6 som kan være enten flat eller bueformet. Den øvre side av matningsslissen dannes av den nedre side av reguleringsventilen 7. Reguleringsventilen er svingbar fordi den er montert på den roterbare eller vippbare aksel 8 som er forsynt med en arm 11 med en motvekt 12. Akselen 8 hviler i en forlengelse 9 av et hus som er forbundet med ledninger ved. hjelp av bolter. As shown in fig. 1 and 2, a suspension of fiber material is introduced through the line 1. Through stationary guide plates 2, 3, 4 which regulate the distribution in the longitudinal direction of the slot, the material is fed to the feed slot and the screen 6, which can be either flat or arc-shaped. The upper side of the feed slot is formed by the lower side of the control valve 7. The control valve is pivotable because it is mounted on the rotatable or tiltable shaft 8 which is provided with an arm 11 with a counterweight 12. The shaft 8 rests in an extension 9 of a housing which are connected by wires at. using bolts.
Ved siden av at den hindrer tilstopping av matningsslissen, har reguleringsventilen den fordel, at når f. eks. fremmed stoff, såsom stykker av maiskolber eller sten e. 1. er tilstede i det tilførte materialet, kan dreies om opp-over for å la dem passere. Videre vil den auto-matisk skaffe en større passasje med større fortrengningsvolum av matningspumpen, og det utøvede mottrykk blir derved i det vesentlige konstant. In addition to preventing clogging of the feed slot, the control valve has the advantage that when e.g. foreign matter, such as pieces of corncobs or stones e. 1. are present in the supplied material, can be turned upside down to allow them to pass. Furthermore, it will automatically provide a larger passage with a larger displacement volume of the feed pump, and the exerted back pressure will thereby be essentially constant.
Oppfinnelsen tilveiebringer den dobbelte virkning at den opprettholder et vesentlig jevnt mottrykk, da skovlen er passende buet i evolventform, og at den lar passere slike gjenstander som maiskolber eller sten e. 1. som føres med av væskestrømmen, og hindrer derved at de setter seg fast og danner stasjo-nære hindringer. The invention provides the double effect of maintaining a substantially uniform back pressure, as the vane is suitably curved in an involute shape, and of allowing such objects as corncobs or stones etc. 1. carried along by the fluid flow to pass, thereby preventing them from becoming stuck and form near-stationary obstacles.
Innretningen kan brukes sammen med The device can be used together with
hvilke som helst ønskede matningsmidler. any desired feeds.
Innretningen kan fordelaktig brukes i forbindelse med en sentrifugalpumpe e. 1., som har den karakteristiske egenskap at trykket minskes med økende matningsmengde og om-vendt. Den kan også fordelaktig brukes for å kompensere variasjoner i matningstrykket, uansett hvilken årsak de har, ved å opprett-holde et omtrent jevnt mottrykk, og dermed en omtrent jevn matningshastighet. Som følge derav vil sikteeffekten på stivelse og fiber-oppslemmingen være i det vesentlige den samme, da matningshastigheten av oppslemmingen over siktoverflaten i det vesentlige vil være jevn. The device can advantageously be used in connection with a centrifugal pump e. 1., which has the characteristic property that the pressure decreases with increasing feed quantity and vice versa. It can also advantageously be used to compensate for variations in the feed pressure, regardless of their cause, by maintaining an approximately uniform back pressure, and thus an approximately uniform feed rate. As a result, the screening effect on the starch and fiber slurry will be substantially the same, as the feed rate of the slurry over the screening surface will be substantially uniform.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27662372A | 1972-07-31 | 1972-07-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
NO131409B true NO131409B (en) | 1975-02-17 |
NO131409C NO131409C (en) | 1975-05-28 |
Family
ID=23057422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO3021/73A NO131409C (en) | 1972-07-31 | 1973-07-26 |
Country Status (15)
Country | Link |
---|---|
JP (1) | JPS4985663A (en) |
AU (1) | AU469724B2 (en) |
BE (1) | BE803019A (en) |
CA (1) | CA998005A (en) |
DE (1) | DE2333479C3 (en) |
DK (1) | DK148875C (en) |
FI (1) | FI59724C (en) |
FR (1) | FR2194450B1 (en) |
GB (1) | GB1438565A (en) |
IL (1) | IL42727A (en) |
IT (1) | IT989937B (en) |
NL (1) | NL7310076A (en) |
NO (1) | NO131409C (en) |
SE (1) | SE412520B (en) |
ZA (1) | ZA734953B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS544121Y2 (en) * | 1974-07-05 | 1979-02-23 | ||
US4066556A (en) * | 1976-10-28 | 1978-01-03 | Johnson & Johnson | Fluid filter and method of making same |
US4187182A (en) * | 1978-07-21 | 1980-02-05 | Pall Corporation | Box filter |
DE2905514A1 (en) * | 1979-02-14 | 1980-08-28 | Fresenius Chem Pharm Ind | Blood filter for removing dead particles or impurities - using dense packing of plastic monofilaments wound into coil on hollow sieve core |
ES2005028A6 (en) * | 1986-10-06 | 1989-02-16 | Terumo Corp | Blood component separator. |
GB8709385D0 (en) * | 1987-04-21 | 1987-05-28 | Polden Products Ltd | Filter assembly |
DE9201574U1 (en) * | 1992-02-08 | 1992-04-23 | Medimex Holfeld Gmbh & Co., 2000 Hamburg, De | |
EP2500077A1 (en) * | 2011-03-17 | 2012-09-19 | Sefar AG | Filter element with two woven layers |
JP7190241B2 (en) * | 2017-10-24 | 2022-12-15 | バッファロー フィルター エルエルシー | Method and apparatus for filtration |
-
1973
- 1973-06-30 DE DE2333479A patent/DE2333479C3/en not_active Expired
- 1973-07-04 AU AU57688/73A patent/AU469724B2/en not_active Expired
- 1973-07-11 CA CA176,184A patent/CA998005A/en not_active Expired
- 1973-07-12 IL IL42727A patent/IL42727A/en unknown
- 1973-07-13 JP JP48079213A patent/JPS4985663A/ja active Pending
- 1973-07-19 NL NL7310076A patent/NL7310076A/xx unknown
- 1973-07-19 IT IT51548/73A patent/IT989937B/en active
- 1973-07-20 ZA ZA734953A patent/ZA734953B/en unknown
- 1973-07-26 NO NO3021/73A patent/NO131409C/no unknown
- 1973-07-26 GB GB3575173A patent/GB1438565A/en not_active Expired
- 1973-07-30 DK DK418873A patent/DK148875C/en active
- 1973-07-30 FI FI2386/73A patent/FI59724C/en active
- 1973-07-31 BE BE134057A patent/BE803019A/en not_active IP Right Cessation
- 1973-07-31 FR FR7328091A patent/FR2194450B1/fr not_active Expired
- 1973-07-31 SE SE7310512A patent/SE412520B/en unknown
Also Published As
Publication number | Publication date |
---|---|
IL42727A (en) | 1976-10-31 |
DE2333479A1 (en) | 1974-02-21 |
FI59724C (en) | 1981-10-12 |
DK148875B (en) | 1985-11-04 |
DE2333479B2 (en) | 1976-11-18 |
JPS4985663A (en) | 1974-08-16 |
FR2194450A1 (en) | 1974-03-01 |
FR2194450B1 (en) | 1977-08-05 |
DK148875C (en) | 1986-04-14 |
DE2333479C3 (en) | 1979-11-22 |
FI59724B (en) | 1981-06-30 |
IL42727A0 (en) | 1973-10-25 |
ZA734953B (en) | 1974-07-31 |
GB1438565A (en) | 1976-06-09 |
BE803019A (en) | 1974-01-31 |
NL7310076A (en) | 1974-02-04 |
CA998005A (en) | 1976-10-05 |
IT989937B (en) | 1975-06-10 |
NO131409C (en) | 1975-05-28 |
SE412520B (en) | 1980-03-10 |
AU5768873A (en) | 1975-01-09 |
AU469724B2 (en) | 1976-02-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
NO131409B (en) | ||
US2916142A (en) | Process and apparatus for separating particles according to size | |
US2329333A (en) | Dewatering screen | |
PL126547B1 (en) | Apparatus for filtering pulps,suspensions and similar materials | |
US3357567A (en) | Fluid filtering device | |
DE4140584A1 (en) | DEVICE FOR SEPARATING A MATERIAL MIXTURE FROM MATERIALS WITH DIFFERENT SPECIFIC WEIGHTS | |
DE2122858A1 (en) | Method and device for pneumatic material conveying | |
US4710296A (en) | Static sieve feed control | |
CS244407B2 (en) | Equipment for filtration of sludges,suspensions or similar materials or for cleaning of lump solid material by means of washing and/or for separation of this material from liquid | |
GB479090A (en) | Improvements in or relating to processes and apparatus for drying granular or powdered materials | |
US2995245A (en) | Separator feeding means | |
DK180024B1 (en) | A food grating apparatus | |
US532944A (en) | Bean-separating machine | |
DE1168840B (en) | Device for uniform and trouble-free loading of sieves or classifiers with aqueous suspensions of starch and fibers | |
US640734A (en) | Grain-cleaner. | |
US1810773A (en) | Grain feeder | |
DE881326C (en) | Device for removing powdered, grainy or pulpy goods from a storage container | |
US285085A (en) | stonebrakee | |
US55031A (en) | Improvement in reducing wood to paper-pulp | |
US3306440A (en) | Winnowing machine for blueberries | |
US727358A (en) | Threshing-machine. | |
US206452A (en) | Improvement in ore-separators | |
SU963560A1 (en) | Removing lumpy impurities off loose materials | |
US814952A (en) | Vibrating screen. | |
US1639797A (en) | Pulp screen |