US2683366A - Washing arrangement for fibrous materials - Google Patents
Washing arrangement for fibrous materials Download PDFInfo
- Publication number
- US2683366A US2683366A US145828A US14582850A US2683366A US 2683366 A US2683366 A US 2683366A US 145828 A US145828 A US 145828A US 14582850 A US14582850 A US 14582850A US 2683366 A US2683366 A US 2683366A
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- Prior art keywords
- tank
- washing
- screen
- supporting plate
- chamber
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
- D06B3/02—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fibres, slivers or rovings
Definitions
- the present invention relates toE an arrangement for washing fibrous material; such;,as;pu lp.
- washing-liquid is ;delivered to thetank through the-t9 thereof and displaces, while flowing 1 downwards, the heavier ,liquor which is Withdrawnfrom theabottom of the tank through the-screen bottom.
- JI'anksof the kind described hava however thedisadvan- Secondly the V-liquid :ilow l. causes :a
- Objects of the invention are-the provision of-a washing tank in which the abovedescribed gdlS- advantages are overcome; provision of; ;an,appa .ratus in which the washing .process'is mapidly carried out so that the-number-of washing tanks necessary to produceva continuous washing process can be appreciably reduced; :r provision qfzan apparatus in whichthe material to :be treated can be evenly and thoroughlyiawashed; provision tankaccording to a preferred embodiment of the ofa washing tank in which the chiefly downwardly directed pressure.
- the treated material "due to its own weight ispreventedifrom fQrming a compact layer of materials-hindering 1iquid Withthese objects in view-the -.present ;invention mainly consists inan ,arrangementtforrwash- --ing fibrous material and comprises-gin; combination, a substantially vertically arranged tank having a wall formed.
- the screen means having -.at;least one outer face outside the cham- --berand at least onerinner faceinside the chamber, theou ter faceof the inclined screen member 5 facing-downwardly; ,and outlet means for a washing liquid located on the tank communicating ,with the vscreening phamber.
- annular downwardly inclined supportingplates project,trom' the inner surface of the tank into the interior of the same and form to- -gether with downwardly inclined annular screen m-embersa plurality of .annularscreening chamberdevices-whichare provided with. outlet means for-a washing liquid.
- screening chamberdevices are located on the bot- -tomavallofthe ,tanlg-each of the screening chamwber devices: having on top a downwardly inclined I supporting plate and including two lateral downvardlyinclinedscreen members, the plate and the screenmembers forming radially extending "screening chambers corninunicating with outlet 2 ,means for thewashing liquid.
- Figrl isa verticalsectionalview of a washing p1 e sent invention
- Fig. 2 is a fragmentary vertical sectional View of another-embodiment ofthe present invention.
- V .3 is arbottom view of the arrangement whownin Fig; 1.
- an inlet la'for fibrous material .to be washed is located in the upper part of the tank, -and ; an outlet 2 for the washed material is -.arranged-in the-center of the bottom lb of the Washing wateris --supplied through the water inlet lc.
- each screening cham l ber device including a downwardly inclined anr ,nular-supporting plate member 5 having-the shape of tizuncatedcones whose highest point is'located adjacent to theivall of the tank.
- a screen means, 5 113 1118157 --the inclined annular screen inember .4 ex- ,z tends i-betweenttheunderside of the: supporting plate meinberg-iand the inner surface gQf the tank so-as' orm-asoreeningchamber.
- Each screenamb s communi at w t nu c m an -.4
- each annular screening member 4 has an inner face located in the screening chamber and an outer face which faces downwardly.
- the inclined annular screen members 4 are protected from the pressure of the material by the supporting plate members which may have projecting edge portions 5a.
- the outer faces of the screen members 4 define with the vertical an angle which is at least as great as the angle formed between the vertical and the resultant of the horizontal and vertical components of the pressure in the treated material whereby any pressure due to the weight of the material on the screen surfaces is prevented.
- the washing process as effected with the above described washing tank is similar to that on employing diffusers of the known type. However, if so desired, at the end of the washing process when the boundary layer between the liquid to be displaced and the washing liquid has reached the uppermost annular screening chamber, it is advantageous to shut off the outlets from the uppermost compartment thereby avoiding unnecessary dilution of the liquid to be displaced. The same measure can be repeated when the boundary layer reaches the next lower screening chamber device and so on.
- each screening chamber device has a downwardly and laterally inclined supporting top plate 23. From the underside of each supporting top plate extend screen means, namely two screen members 25 which, together with the surface of the tank bottom and with the top plate 23, form a screening chamber communicating with outlets 25. Outlets il l communicate through an annular pipe 24a with an outlet pipe which is controlled by a valve 26. It will be understood that each of the elements described above may also find a useful application in other types of washing tanks for fibrous material differing from the types described above.
- An arrangement for washing a fibrous ma terial comprising, in combination, a substantially vertically arranged elongated. tank having a wall formed with an inlet for material to be washed at the upper end of said tank and an outlet for washed material at the lower end of said tank; at least one screening chamber device including at least one inclined supporting plate member secured to the inner surface of said wall and projecting from the same downwardly into the interi r of said tank, said inclined supporting plate member having the highest point thereof located adjacent to said wall of said tank, said plate member being adapted to support material to be washed, inclined screen means extending between the underside of said supporting plate member and said inner surface of said wall so as to form a screening chamber bounded by said supporting plate member, said inner surface of said wall, and said screen means, said screen means having at least one outer face outside said chamber and at least one inner face inside said chamber, said outer face of said inclined screen member facing downwardly; and outlet means for a washing liquid located on said tank communicating with said screening chamber.
- An arrangement for washing a fibrous material comprising, in combination, a substantially vertically arranged elongated tank having a wall formed with an inlet for material to be washed at the upper end of said tank and an outlet for washed material at the lower end of said tank; at least one inclined supporting plate member secured to the inner surface of said wall and projecting from the same downwardly into the interior of said tank, said inclined supporting plate member having the highest point thereof located adjacent to said wall of said tank, said plate member being adapted to support material to be washed; at least one inclined screen member extending between the underside of said supporting plate member and said inner surface of said wall so as to form a chamber bounded by said supporting plate member, said inner surface of said wall, and said screen member, said screen member having an outer face outside said chamber and an inner face inside said chamber, said outer face of said inclined screen member facing downwardly; and outlet means for a washing liquid located on said tank communicating with the lowermost point of said chamber.
- An arrangement for washing a fibrous material comprising, in combination, a substantially vertically arranged elongated tank having a wall formed with an inlet for material to be washed at the upper end of said tank and an outlet for washed material at the lower end of said tank; at least one inclined annular supporting plate member secured to the inner surface of said wall and projecting from the same downwardly into the interior of said tank and having a free annular edge, said inclined supporting plate member having the highest point thereof located adjacent to said wall of said tank, said plate member being adapted to support material to be washed; at least one inclined annular screen member extending between the underside of said supporting plate member spaced from said annular free edge of the same, and said inner surface of said wall so as to form a chamber bounded by said support ing plate member, said inner surface of said wall, and said screen member, said screen member having an outer face outside said chamber and an inner face inside said chamber, said outer face of said inclined screen member facing downwardly; and outlet means for a washing liquid located on said tank communicating with said
- An arrangement for washing a fibrous material comprising, in combination, a substantially vertically arranged elongated tank having a wall formed with an inlet for material to be washed at the upper end of said tank and an outlet for washed material at the lower end of said tank; a plurality of inclined annular supporting plate members secured to the inner surfaceof said wall and projecting from the same downwardly into the interior of said tank and having a free annular edge, said inclined supporting plate members having the highest point thereof located adjacent to'said wall of said tank, said plate members being adapted to support material to be washed; a plurality of inclined annular screen members, each screen member extending between the underside of one supporting plate member spaced from said annular free edge of the same, and said inner surface of said wall so as to form a chamber bounded by said supporting plate member, said inner surface of said wall, and said screen member, each of said screen members having an outer face outside said chamber and an inner face inside said chamber, said outer faces of said inclined screen members facing downwardly; and outlet means for a
- An arrangement for washing a fibrous material comprising, in combination, a substantially vertically arranged elongated cylindrical tank formed. with an inlet for material to be washed at the upper end thereof and having a bottom wall formed with an outlet for washed material in the center thereof; a plurality of elongated screening chamber devices located on said bottom wall of said tank extending radially with respect to said outlet, each oi said screening chamber devices including an inclined elongated supporting plate member secured to and projecting downwardly from the cylindrical inner surface of said tank into the interior of said tank andv having the highest point thereof located adjacent said cylindrical inner surface, said plate ,;member being adapted to support material to be washed, and inclined screen means including two inclined screen members, each screen member extending between the underside of said plate member and the inner surface of said bottom wall adjacent to a longitudinal edge of said supporting plate member, said supporting plate members, said screen members and the inner surface of said bottom wall defining an elongated screening chamber in each of said screening chamber devices, each of said inclined screen members having an outer
- Arrangement for washing material comprising, in combination, a tank having an inlet for the material to be washed located in the upper part of said tank, and an outlet for washed material on the bottom of the same; at least one inclined supporting plate member having an upper and a lower edge and being secured to the inner surface of said tank projecting from the same inwardly and downwardly into the interior of said tank, said supporting plate member being adapted to support material to be washed; at one screen member mounted in said tank extending downwardly from the underside of said supporting plate member between the same and said inner surface of said tank so as to form together with said inner surface of said tank and.
- said inclined supporting plate member a chamber bounded on one side by the inner face of said screen member, said screen member having an upper edge located on said underside of said supporting plate member and a lower edge located on said inner surface of said tank, and an outer face extending from said upper edge to said lower edge thereof and being inclined relative to a vertical passing through said upper edge thereof toward said upper edge of said supporting plate member so as to face downwardly; and outlet means for a washing liquid mounted on said tank and communicating with said chamber.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Cleaning By Liquid Or Steam (AREA)
Description
y 13, 1954 G. KULVlK ET AL 2,683,366
WASHING ARRANGEMENT FOR FIBROUS MATERIALS Filed Feb 23. 1950 HEQZ.
5r KIM' W W (wot.
BY Q 4 washing tanks or containers with screenybottoms.
Patented July 13, 1954 umreo PA-TENT OFFICE WASHING .ARBANGEMENI r0 .EIBROUS Ma'rERn s Gun-nan Kulvikand' Lasse Johan Hannunkari, :Oulu, Finland Apm c imr ebruary 2.3., 19.50, "sem narians uGlaimsipriority, application Finland :Febnuary 26,111549 ,6 gGlaims.
The present invention relates toE an arrangement for washing fibrous material; such;,as;pu lp.
In washing fibrous -materia1s;,-s uch as-che'mical pulp it has heretofore been customary touse During the washing process washing-liquid is ;delivered to thetank through the-t9 thereof and displaces, while flowing 1 downwards, the heavier ,liquor which is Withdrawnfrom theabottom of the tank through the-screen bottom. JI'anksof the kind described hava however thedisadvan- Secondly the V-liquid :ilow l. causes :a
thesize of passages throughthe material.
Objects of the invention are-the provision of-a washing tank in which the abovedescribed gdlS- advantages are overcome; provision of; ;an,appa .ratus in which the washing .process'is mapidly carried out so that the-number-of washing tanks necessary to produceva continuous washing process can be appreciably reduced; :r provision qfzan apparatus in whichthe material to :be treated can be evenly and thoroughlyiawashed; provision tankaccording to a preferred embodiment of the ofa washing tank in which the chiefly downwardly directed pressure. in :the treated material "due to its own weight ispreventedifrom fQrming a compact layer of materials-hindering 1iquid Withthese objects in view-the -.present ;invention mainly consists inan ,arrangementtforrwash- --ing fibrous material and comprises-gin; combination, a substantially vertically arranged tank having a wall formed. withan inletior material to be washed at the upper end 0f; said tanksand an outlet for washed material at the lower end' of the tank; at least one screeningqchamberdevice including at least one inclin'ed' ;supp0rtingwp1ate member secured to the inner surface ottherwall v -and pr j n from the .same' -downWard1y- -into the interior of the tank, the inclinedesupporting 11312138 member having the highest poinbthereef located adjacent to r the wall .of the gtank, ;the platemember being adapted -to 'support material :to-be washed, inclined screen rneansee etending' :between the underside of the -suppQrti :plate membelwand th inner.surfaceofsth .wall was to iorm a. screening-chamberbounded; by: th -;:{sup- ,porting plate :memben-Ltherinner:surface;ofcthesgn in fltank and. controlled-h ya valve 3.
'2 wall, and therscreen :means, the screen means having -.at;least one outer face outside the cham- --berand at least onerinner faceinside the chamber, theou ter faceof the inclined screen member 5 facing-downwardly; ,and outlet means for a washing liquid located on the tank communicating ,with the vscreening phamber.
According to one embodiment of the present invention annular downwardly inclined supportingplates project,trom' the inner surface of the tank into the interior of the same and form to- -gether with downwardly inclined annular screen m-embersa plurality of .annularscreening chamberdevices-whichare provided with. outlet means for-a washing liquid.
,According to another: embodiment of the presl-ent- -invention -aplurality of radially extending .:,screening chamberdevices are located on the bot- -tomavallofthe ,tanlg-each of the screening chamwber devices: having on top a downwardly inclined I supporting plate and including two lateral downvardlyinclinedscreen members, the plate and the screenmembers forming radially extending "screening chambers corninunicating with outlet 2 ,means for thewashing liquid.
-;'I;he ;inventionwil1 be best understood from the following descriptions of specific embodiments :when read-in connectionwith the-accompanying drawingsinwhich:
Figrl isa verticalsectionalview of a washing p1 e sent invention;
Fig. 2 is a fragmentary vertical sectional View of another-embodiment ofthe present invention;
and V .3 :is arbottom view of the arrangement whownin Fig; 1.
,iReferringnow-to Figs. 1 and 3, in an vupright washing tank i an inlet la'for fibrous material .to be washed is located in the upper part of the tank, -and ;an outlet 2 for the washed material is -.arranged-in the-center of the bottom lb of the Washing wateris --supplied through the water inlet lc.
.l-A -tpllllsality of ,annularscreening chamber devices;, A,-.-B, 3C are provided, each screening cham l ber device including a downwardly inclined anr ,nular-supporting plate member 5 having-the shape of tizuncatedcones whose highest point is'located adjacent to theivall of the tank. A screen means, 5 113 1118157 --the inclined annular screen inember .4 ex- ,z tends i-betweenttheunderside of the: supporting plate meinberg-iand the inner surface gQf the tank so-as' orm-asoreeningchamber. -.-Each screenamb s communi at w t nu c m an -.4
I, 8, respectively, which end in annular pipes 6a, la, and 8a, respectively, communicating with outlet pipes 6b, lb, and 82). Closing valves 9, l and I l are arranged in the outlet pipes Bb, lb and 81). As clearly shown in the drawing each annular screening member 4 has an inner face located in the screening chamber and an outer face which faces downwardly. The inclined annular screen members 4 are protected from the pressure of the material by the supporting plate members which may have projecting edge portions 5a. The outer faces of the screen members 4 define with the vertical an angle which is at least as great as the angle formed between the vertical and the resultant of the horizontal and vertical components of the pressure in the treated material whereby any pressure due to the weight of the material on the screen surfaces is prevented.
The washing process as effected with the above described washing tank is similar to that on employing diffusers of the known type. However, if so desired, at the end of the washing process when the boundary layer between the liquid to be displaced and the washing liquid has reached the uppermost annular screening chamber, it is advantageous to shut off the outlets from the uppermost compartment thereby avoiding unnecessary dilution of the liquid to be displaced. The same measure can be repeated when the boundary layer reaches the next lower screening chamber device and so on.
In the embodiment shown in Fig. 2 the screen members are arranged so as to form the side walls 25 of radially arranged screening chamber devices 23. According to this embodiment each screening chamber device has a downwardly and laterally inclined supporting top plate 23. From the underside of each supporting top plate extend screen means, namely two screen members 25 which, together with the surface of the tank bottom and with the top plate 23, form a screening chamber communicating with outlets 25. Outlets il l communicate through an annular pipe 24a with an outlet pipe which is controlled by a valve 26. It will be understood that each of the elements described above may also find a useful application in other types of washing tanks for fibrous material differing from the types described above.
The invention is not intended to be limited to the detail shown since various modifications may be made without departing from the spirit of the present invention.
What is claimed. new and desired to be secured by Letters Patent is: I
1. An arrangement for washing a fibrous ma terial, comprising, in combination, a substantially vertically arranged elongated. tank having a wall formed with an inlet for material to be washed at the upper end of said tank and an outlet for washed material at the lower end of said tank; at least one screening chamber device including at least one inclined supporting plate member secured to the inner surface of said wall and projecting from the same downwardly into the interi r of said tank, said inclined supporting plate member having the highest point thereof located adjacent to said wall of said tank, said plate member being adapted to support material to be washed, inclined screen means extending between the underside of said supporting plate member and said inner surface of said wall so as to form a screening chamber bounded by said supporting plate member, said inner surface of said wall, and said screen means, said screen means having at least one outer face outside said chamber and at least one inner face inside said chamber, said outer face of said inclined screen member facing downwardly; and outlet means for a washing liquid located on said tank communicating with said screening chamber.
2. An arrangement for washing a fibrous material, comprising, in combination, a substantially vertically arranged elongated tank having a wall formed with an inlet for material to be washed at the upper end of said tank and an outlet for washed material at the lower end of said tank; at least one inclined supporting plate member secured to the inner surface of said wall and projecting from the same downwardly into the interior of said tank, said inclined supporting plate member having the highest point thereof located adjacent to said wall of said tank, said plate member being adapted to support material to be washed; at least one inclined screen member extending between the underside of said supporting plate member and said inner surface of said wall so as to form a chamber bounded by said supporting plate member, said inner surface of said wall, and said screen member, said screen member having an outer face outside said chamber and an inner face inside said chamber, said outer face of said inclined screen member facing downwardly; and outlet means for a washing liquid located on said tank communicating with the lowermost point of said chamber.
3. An arrangement for washing a fibrous material, comprising, in combination, a substantially vertically arranged elongated tank having a wall formed with an inlet for material to be washed at the upper end of said tank and an outlet for washed material at the lower end of said tank; at least one inclined annular supporting plate member secured to the inner surface of said wall and projecting from the same downwardly into the interior of said tank and having a free annular edge, said inclined supporting plate member having the highest point thereof located adjacent to said wall of said tank, said plate member being adapted to support material to be washed; at least one inclined annular screen member extending between the underside of said supporting plate member spaced from said annular free edge of the same, and said inner surface of said wall so as to form a chamber bounded by said support ing plate member, said inner surface of said wall, and said screen member, said screen member having an outer face outside said chamber and an inner face inside said chamber, said outer face of said inclined screen member facing downwardly; and outlet means for a washing liquid located on said tank communicating with said chamber.
4. An arrangement for washing a fibrous material, comprising, in combination, a substantially vertically arranged elongated tank having a wall formed with an inlet for material to be washed at the upper end of said tank and an outlet for washed material at the lower end of said tank; a plurality of inclined annular supporting plate members secured to the inner surfaceof said wall and projecting from the same downwardly into the interior of said tank and having a free annular edge, said inclined supporting plate members having the highest point thereof located adjacent to'said wall of said tank, said plate members being adapted to support material to be washed; a plurality of inclined annular screen members, each screen member extending between the underside of one supporting plate member spaced from said annular free edge of the same, and said inner surface of said wall so as to form a chamber bounded by said supporting plate member, said inner surface of said wall, and said screen member, each of said screen members having an outer face outside said chamber and an inner face inside said chamber, said outer faces of said inclined screen members facing downwardly; and outlet means for a washing liquid located on said tank communicating with the lowermost points of said chambers.
5. An arrangement for washing a fibrous material, comprising, in combination, a substantially vertically arranged elongated cylindrical tank formed. with an inlet for material to be washed at the upper end thereof and having a bottom wall formed with an outlet for washed material in the center thereof; a plurality of elongated screening chamber devices located on said bottom wall of said tank extending radially with respect to said outlet, each oi said screening chamber devices including an inclined elongated supporting plate member secured to and projecting downwardly from the cylindrical inner surface of said tank into the interior of said tank andv having the highest point thereof located adjacent said cylindrical inner surface, said plate ,;member being adapted to support material to be washed, and inclined screen means including two inclined screen members, each screen member extending between the underside of said plate member and the inner surface of said bottom wall adjacent to a longitudinal edge of said supporting plate member, said supporting plate members, said screen members and the inner surface of said bottom wall defining an elongated screening chamber in each of said screening chamber devices, each of said inclined screen members having an outer face located outside of the corresponding chamber and an inner face located inside said corresponding chamber, said screen members being inclined with said outer faces facing downwardly; and outlet means for a washing liquid in said bottom wall of said tank communicating with the lowermost portions of said elongated screening chambers.
6. Arrangement for washing material, comprising, in combination, a tank having an inlet for the material to be washed located in the upper part of said tank, and an outlet for washed material on the bottom of the same; at least one inclined supporting plate member having an upper and a lower edge and being secured to the inner surface of said tank projecting from the same inwardly and downwardly into the interior of said tank, said supporting plate member being adapted to support material to be washed; at one screen member mounted in said tank extending downwardly from the underside of said supporting plate member between the same and said inner surface of said tank so as to form together with said inner surface of said tank and. with said inclined supporting plate member a chamber bounded on one side by the inner face of said screen member, said screen member having an upper edge located on said underside of said supporting plate member and a lower edge located on said inner surface of said tank, and an outer face extending from said upper edge to said lower edge thereof and being inclined relative to a vertical passing through said upper edge thereof toward said upper edge of said supporting plate member so as to face downwardly; and outlet means for a washing liquid mounted on said tank and communicating with said chamber.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 745397 Hood Dec. 1, 1903 1,776,761 Morterud Sept. 23, 1930 1,977,909 Goldberg Oct. 23, 1934 FOREIGN PATENTS Number Country Date 63,250 Sweden Feb. 4, 1925 45, 427 Norway July 30, 1928 78,662 Sweden Sept. 29, 1930 88,861 Sweden Jan. 21, 1937
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI2683366X | 1949-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2683366A true US2683366A (en) | 1954-07-13 |
Family
ID=8566515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US145828A Expired - Lifetime US2683366A (en) | 1949-02-26 | 1950-02-23 | Washing arrangement for fibrous materials |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2683366A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3078703A (en) * | 1960-09-10 | 1963-02-26 | Kamyr Ab | Sieve arrangement in cylindrical containers for cellulosic pulp |
| US3398412A (en) * | 1964-12-17 | 1968-08-27 | Aremaa Toivo Ensio | Method for precipitation or washing of materials containing cellulose |
| US3622262A (en) * | 1967-04-13 | 1971-11-23 | Sunds Ab | Method for washing preferentially cellulosic pulp |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US745497A (en) * | 1902-08-15 | 1903-12-01 | John P Mcandrews | Filter. |
| US1776761A (en) * | 1928-04-02 | 1930-09-23 | Morterud Einar | Method for blowing out pulp digesters |
| US1977909A (en) * | 1931-11-19 | 1934-10-23 | Goldberg Nathan | Ore separator |
-
1950
- 1950-02-23 US US145828A patent/US2683366A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US745497A (en) * | 1902-08-15 | 1903-12-01 | John P Mcandrews | Filter. |
| US1776761A (en) * | 1928-04-02 | 1930-09-23 | Morterud Einar | Method for blowing out pulp digesters |
| US1977909A (en) * | 1931-11-19 | 1934-10-23 | Goldberg Nathan | Ore separator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3078703A (en) * | 1960-09-10 | 1963-02-26 | Kamyr Ab | Sieve arrangement in cylindrical containers for cellulosic pulp |
| US3398412A (en) * | 1964-12-17 | 1968-08-27 | Aremaa Toivo Ensio | Method for precipitation or washing of materials containing cellulose |
| US3622262A (en) * | 1967-04-13 | 1971-11-23 | Sunds Ab | Method for washing preferentially cellulosic pulp |
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