DE1298868B - Sieving machine for slurries, especially pulp suspensions - Google Patents
Sieving machine for slurries, especially pulp suspensionsInfo
- Publication number
- DE1298868B DE1298868B DEB94748A DEB0094748A DE1298868B DE 1298868 B DE1298868 B DE 1298868B DE B94748 A DEB94748 A DE B94748A DE B0094748 A DEB0094748 A DE B0094748A DE 1298868 B DE1298868 B DE 1298868B
- Authority
- DE
- Germany
- Prior art keywords
- sieve
- ring
- housing
- sieving machine
- channel
- 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.)
- Pending
Links
- 238000007873 sieving Methods 0.000 title claims description 9
- 239000002002 slurry Substances 0.000 title claims description 3
- 239000000725 suspension Substances 0.000 title claims description 3
- 239000000463 material Substances 0.000 claims description 16
- 238000012216 screening Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
- D21D5/023—Stationary screen-drums
- D21D5/026—Stationary screen-drums with rotating cleaning foils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/23—Supported filter elements arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
- B01D29/54—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/86—Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
- B01D29/908—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding provoking a tangential stream
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
- B01D29/945—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes for continuously discharging concentrated liquid
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
- D21D5/06—Rotary screen-drums
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Description
Gegenstand des Patents 1257546 ist eine Siebmaschine für Aufschlämmungen, insbesondere Faserstoff-Suspensionen für die Papierherstellung, bestehend aus einem Gehäuse mit einer Mehrzahl von Öffnungen, nämlich einem einzigen Einlaß für das zu reinigende Siebgut, einem ersten Auslaß zum Austrag der gewünschten Bestandteile und einem oder mehreren weiteren Auslässen für die unerwünschten Bestandteile des Siebgutes, mit einem konzentrisch innerhalb des Gehäuses angeordneten, kreisförmigen Siebelement, das aus einem inneren Siebring und einem im radialen Abstand davon liegenden äußeren Siebring besteht, die zwischen sich eine Ringkammer einschließen, die mit einer ersten, sich erweiternden Ringwanne, die einen Sammel-Ringkanal bildet, in Verbindung steht, der im wesentlichen konzentrisch innerhalb des Gehäuses angeordnet ist und einen ersten Auslaß hat, der sich bis außerhalb des Gehäuses erstreckt und auf einer Seite senkrecht zur Achse des Ringkanals angeordnet ist und mit gegenüber dem inneren und äußeren Siebring innerhalb des Gehäuses drehbar gelagerten und angetriebenen Flügelblättern. The subject of patent 1257546 is a screening machine for slurries, in particular pulp suspensions for paper production, consisting of a Housing with a plurality of openings, namely a single inlet for the screenings to be cleaned, a first outlet for discharging the desired components and one or more further outlets for the undesirable components of the Material to be screened, with a circular one arranged concentrically within the housing Sieve element, which consists of an inner sieve ring and one at a radial distance from it lying outer sieve ring, which enclose an annular chamber between them, those with a first, expanding ring trough, which forms a collecting ring channel, is in communication, which is arranged substantially concentrically within the housing is and has a first outlet which extends to the outside of the housing and is arranged on one side perpendicular to the axis of the annular channel and opposite the inner and outer sieve ring rotatably mounted and driven within the housing Wing blades.
Hinter den beiden konzentrischen Siebringen fällt das gereinigte Siebgut an, in hohem Maße frei von unerwünschten Bestandteilen. The cleaned one falls behind the two concentric sieve rings To a large extent free of undesirable components.
Es wurde gefunden, daß die Fliehkraft, der das tangential in die Siebmaschine eingeführte Siebgut unterworfen ist, unerwünschte Bestandteile durch den inneren Siebring drückt, der von dem der Fliehkraft unterworfenen Siebgut unmittelbar beaufschlagt wird, so daß der Siebeffekt nicht optimal ist. Die Erfindung beseitigt diesen-Nachteil durch eine Anordnung der Siebringe derart, daß beide Siebringe, also auch der innere, entgegen der Richtung der Fliehkraft, der das Siebgut unterworfen ist, durchströmt sind, d. h. also radial nach innen. It has been found that the centrifugal force that is tangential to the Sieving machine imported material to be sieved is subject to undesirable constituents through presses the inner sieve ring, which is directly affected by the centrifugal force is acted upon, so that the sieving effect is not optimal. The invention eliminated this disadvantage by arranging the sieve rings in such a way that both sieve rings, thus also the inner one, contrary to the direction of the centrifugal force to which the material to be screened is subjected is flowed through, d. H. so radially inwards.
Um diesen radial nach innen gerichteten Strom des Siebgutes durch die Siebringe zu erzwingen, ist gemäß der Erfindung jedem Siebring im radialen Abstand eine innere Ringwandung zugeordnet. Die von je einem Siebring mit Ringwandung gebildeten Ringkammern stehen über einen Sammel-Ringkanal mit einem ersten Auslaß in Verbindung, über den das in den beiden Ringkammern anfallende gereinigte Siebgut ausgetragen wird. To this radially inwardly directed flow of the screenings through To force the sieve rings is, according to the invention, each sieve ring at a radial distance assigned an inner ring wall. Each formed by a sieve ring with an annular wall Annular chambers are connected to a first outlet via a collecting ring channel, via which the cleaned material to be screened in the two annular chambers is discharged will.
Wesentlich an der Erfindung ist demnach, daß der innere Siebring einer Sieb anordnung nach dem Hauptpatent zu einer geschlossenen Wand wird. It is therefore essential to the invention that the inner sieve ring a sieve arrangement according to the main patent becomes a closed wall.
Zwei solcher Sieb anordnungen mit je einem Siebring braucht man, um zumindest die gleiche Leistung der Siebmaschine nach dem Hauptpatent zu erhalten.You need two such sieve arrangements, each with a sieve ring to get at least the same performance of the screening machine according to the main patent.
Die im radialen Abstand voneinander angeordneten Sieb elemente schließen weiterhin zwischen sich einen Ringraum ein. Die in diesem Ringraum absinkenden unerwünschten Bestandteile werden von einem zu einem vierten Auslaß führenden Kanal ausgetragen. The sieve elements, which are arranged at a radial distance from one another, close continue to have an annulus between them. The undesirable sinking in this annulus Components are discharged from a channel leading to a fourth outlet.
Die doppelte Sieb anordnung gemäß der Erfindung ermöglicht es, gereinigtes Siebgut verschiedenen Reinheitsgrades zu erhalten, da die Siebringe mit unterschiedlichen Sieböffnungen ausgestattet werden können. Dies wurde zwar schon im Hauptpatent vorgeschlagen, was dort jedoch nicht zu der im Rahmen dieser Erfindung angestrebten Wirkung führt. Um jede Ringkammer der Sieb anordnungen mit einem Auslaß zu versehen, wird der Sammel-Ringkanal unterhalb der Siebanordnungen durch eine Trenn- wand in zwei gesonderte Ringkanäle unterteilt, die zu getrennten Auslässen führen. The double sieve arrangement according to the invention allows purified To get sieved material of different degrees of purity, since the sieve rings with different Sieve openings can be equipped. This was already suggested in the main patent, However, this does not lead to the effect sought in the context of this invention there. In order to provide each annular chamber of the sieve arrangements with an outlet, the collecting ring channel below the sieve arrangements by a separating wall in two separate ring channels divided, which lead to separate outlets.
Die Erfindung ist nicht an die Anzahl von zwei Siebringen gebunden, vielmehr können mehrere Siebringe, die radial nach innen durchströmt werden, vorgesehen werden. The invention is not tied to the number of two sieves, rather, several sieve rings through which the flow radially inward can be provided will.
In der Zeichnung ist ein Ausführungsbeispiel einer Siebmaschine gemäß der Erfindung dargestellt, und zwar zeigt F i g. 1 eine Seitenansicht, teilweise im senkrechten Schnitt, F i g. 2 eine Draufsicht mit teilweise weggebrochenem Deckel, die gegenüber F i g. 1 um 900 im Gegenuhrzeigersinn gedreht ist, und Fig. 3 einen teilweisen senkrechten Schnitt durch einen unterteilten Sammel-Ringkanal. In the drawing, an embodiment of a screening machine is shown in accordance with of the invention, namely FIG. 1 is a side view, partially in vertical section, F i g. 2 is a plan view with the cover partially broken away; the opposite to F i g. 1 is rotated by 900 counterclockwise, and FIG. 3 is a partial vertical section through a subdivided collecting ring channel.
Die allgemein mit 10 bezeichnete Siebmaschine hat in der Nähe des Oberteiles des Gehäuses 12 einen Einlaß 14 für das Siebgut. Das Siebgut gelangt in eine innerhalb des Gehäuses 12 gelegene Ringkammer 15. The screening machine, generally designated 10, has in the vicinity of the Upper part of the housing 12 has an inlet 14 for the material to be screened. The material to be screened arrives into an annular chamber 15 located inside the housing 12.
Innerhalb des Gehäuses 12 sind zwei Siebanordnungen 18 und 19 konzentrisch zueinander angeordnet.Two screen assemblies 18 and 19 are concentric within the housing 12 arranged to each other.
Die äußere Siebanordnung 18 besteht aus einem Siebring 16, einem inneren gitterförmigen Tragglied 16 a, einer die innere Ringkammer 18 a abschließende Ringwandung 16 b - und einem oberen Ringdeckel 16 c, der oberhalb des Traggliedes 16 a liegt und die zylindrische Siebanordnung 18 nach oben abschließt.The outer sieve assembly 18 consists of a sieve ring 16, an inner one Lattice-shaped support member 16 a, a ring wall terminating the inner annular chamber 18 a 16 b - and an upper ring cover 16 c, which is above the support member 16 a and the cylindrical screen assembly 18 closes off at the top.
Die Ringkammer 18 a steht über eine Öffnung 47 mit dem ringförmigen Aufuehruerkanal 17 in Verbindung.The annular chamber 18 a is through an opening 47 with the annular Aufuehruerkanal 17 in connection.
Im radialen Abstand von der Siebanordnung 18 ist eine weitere innere Sieb anordnung 19 vorgesehen, die ebenfalls aus einem äußeren Siebring20, einem gitterförmigen Tragglied 20a, einer Ringwandung 20 b und einem oberen Ringdeckel 20 c besteht. Die Wandung 20 b ist gleichzeitig die Tragsäule 48 innerhalb des Gehäuses 12. At a radial distance from the screen assembly 18 is another inner one Sieve arrangement 19 is provided, which also consists of an outer Siebring20, a lattice-shaped support member 20a, an annular wall 20b and an upper ring cover 20 c exists. The wall 20 b is at the same time the support column 48 within the housing 12th
Die äußere Siebanordnung 18 wird von der Ringkammer 15 aus radial nach innen, d. h. entgegen der Fliehkraft, der das Sieb gut unterworfen ist, angeströmt. Das gereinigte Siebgut in der Ringkammer 18 a gelangt in den unteren Sammel-Ringkanal 17 und von dort zum Auslaß 27. Die innere Siebanordnung 19 wird von Siebgut beaufschlagt, das bei gefüllter Ringkammer 15 über die äußere Siebanordnung 18 hinwegfließt und in der im Hauptpatent beschriebenen Weise vorgereinigt ist. Das Siebgut gelangt dabei in den zwischen beiden Siebanordnungen 18, 19 liegenden Ringraum 25. Das den Siebring passierende Siebgut gelangt über die Aufnehmer-Ringkammer 23 und eine Öffnung 46 ebenfalls in den ringförmigen Aufnehmerkanal-17 und von dort zum Hauptauslaß 27. Das hier austretende gereinigte Siebgut hat dank der Durchströmung der Siebringe in einer der Fliehkraft entgegengesetzten Richtung eine mehr gleichmäßige Konsistenz, da unerwünschte Bestandteile von der Fliehkraft nicht mehr durch die Siebe gedrückt werden. The outer screen arrangement 18 becomes radial from the annular chamber 15 inward, d. H. against the centrifugal force to which the sieve is well subjected. The cleaned material to be sieved in the annular chamber 18 a reaches the lower collecting ring channel 17 and from there to the outlet 27. The inner sieve arrangement 19 is acted upon by sieve material, which, when the annular chamber 15 is filled, flows over the outer screen arrangement 18 and is pre-cleaned in the manner described in the main patent. The material to be screened arrives while in the annular space 25 lying between the two screen assemblies 18, 19 Sieving material passing through the sieve ring passes through the receiving ring chamber 23 and an opening 46 also into the annular receiving channel 17 and from there to the main outlet 27. The cleaned material to be screened exiting here has, thanks to the flow through the screen rings a more even consistency in a direction opposite to the centrifugal force, because unwanted components are no longer pushed through the sieves by centrifugal force will.
Wie am besten aus F i g. 2 zu ersehen ist, erstrecken sich über und entlang der Siebringe 16 und 20 an sich bekannte drehbar angetriebene Flügelblätter 35 und 37, von denen die Flügelblätter 35 in Fig. 1 strichpunktiert dargestellt sind. Die Flügelblätter reinigen durch ihre Drehung die Siebringe 16,20 und verhindern, daß sich diese verstopfen. Die gelösten Verunreinigungen sinken sowohl in der äußeren Ringkammer 15 als auch in der Zwischen-Ringkammer 25 ab und werden durch einen Auslaß 31 bzw. 33, 34 ausgetragen. As best seen in Fig. 2 can be seen, extend over and rotatably driven vane blades known per se along the sieve rings 16 and 20 35 and 37, of which the blades 35 are shown in phantom in FIG are. The rotation of the blades cleans the sieve rings 16, 20 and prevents that these clog. The dissolved impurities sink both in the outer Annular chamber 15 as well as in the intermediate annular chamber 25 from and will discharged through an outlet 31 and 33, 34, respectively.
Wie im Hauptpatent beschrieben, sind die äußeren Flügelblätter 35 durch einen Versteifungsring 73 bei ihrer Rotation gegen Verbiegen gesichert. Der innere Kranz von Flügelblättern37 ist ohne einen solchen Versteifungsring dargestellt, weil die inneren Flügelblätter wegen der Kürze ihrer Tragarme 70 weniger Durchbiegungen ausgesetzt sind. As described in the main patent, the outer wing blades are 35 secured against bending during their rotation by a stiffening ring 73. Of the inner wreath of wing blades37 is shown without such a stiffening ring, because the inner blades because of the shortness of their support arms 70 less deflections are exposed.
Aus den voneinander unabhängigen Auslässen 29, 31 und 34 werden - wie im Hauptpatent beschrieben - Teilströme des Siebgutes mit unerwünschten Bestandteilen unterschiedlicher Beschaffenheit ausgetragen. Die Erfindung erlaubt es nunmehr auch, Teilströme von gereinigtem Siebgut unterschiedlicher Konsistenz zu erhalten, indem die Siebringe 16 und 20 mit unterschiedlichen Sieböffnungen versehen werden. Um die aus den Siebanordnungen 18 und 19 unten austretenden Teilströme getrennt zu halten, wird der Sammel-Ringkanal 17 durch eine Trennwand 100 in zwei getrennte Aufnehmerkammern 17 a und 17 b unterteilt (Fig. 3). The independent outlets 29, 31 and 34 become - as described in the main patent - partial flows of the material to be screened with undesirable components of different nature. The invention now also allows To obtain partial flows of cleaned material to be screened of different consistencies by the sieve rings 16 and 20 are provided with different sieve openings. Around the substreams emerging from the sieve arrangements 18 and 19 below separately hold, the collecting ring channel 17 is separated into two by a partition 100 Receiving chambers 17 a and 17 b divided (Fig. 3).
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US522638A US3387708A (en) | 1966-01-24 | 1966-01-24 | Paper machine screen |
US583639A US3456793A (en) | 1966-01-24 | 1966-10-03 | Dual pressure stock screen |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1298868B true DE1298868B (en) | 1969-07-03 |
Family
ID=24333972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB94748A Pending DE1298868B (en) | 1966-01-24 | 1967-09-30 | Sieving machine for slurries, especially pulp suspensions |
Country Status (5)
Country | Link |
---|---|
US (1) | US3456793A (en) |
DE (1) | DE1298868B (en) |
ES (1) | ES345591A1 (en) |
FR (1) | FR93277E (en) |
GB (1) | GB1188726A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0315737A1 (en) * | 1987-11-11 | 1989-05-17 | A. Ahlstrom Corporation | Method and apparatus for treating pulp |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3642139A (en) * | 1968-08-12 | 1972-02-15 | Peter C Wilson | Apparatus for centrifugally removing liquid from a mixture |
DE2526657C3 (en) * | 1975-06-14 | 1978-10-26 | Hermann Finckh, Maschinenfabrik, 7417 Pfullingen | Pressure sifter for fiber suspensions |
US4017387A (en) * | 1975-08-11 | 1977-04-12 | The Black Clawson Company | Screening apparatus |
US4111799A (en) * | 1977-07-07 | 1978-09-05 | Beloit Corporation | Stock screen foil |
US4213823A (en) * | 1979-04-26 | 1980-07-22 | Beloit Corporation | Paper making machine screen with staggered foils |
DE3424919A1 (en) * | 1984-07-06 | 1986-01-16 | J.M. Voith Gmbh, 7920 Heidenheim | METHOD FOR RECYCLING PAPER |
FR2677265A1 (en) * | 1991-06-06 | 1992-12-11 | Beaudrey & Cie | Filter with stationary strainer |
DE4308225C1 (en) * | 1993-03-16 | 1994-11-24 | Escher Wyss Gmbh | Process for sorting fiber suspension and screening device for carrying it out |
DE102006008758A1 (en) * | 2006-02-24 | 2007-08-30 | Voith Patent Gmbh | Rotor for a pressure sorter for fiber suspensions |
CN114646736A (en) * | 2022-04-19 | 2022-06-21 | 薛松 | Preparation method and application of tungsten oxide-graphene composite material |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1714047A (en) * | 1929-05-21 | And claude l | ||
US591645A (en) * | 1897-10-12 | Pulp-screen | ||
US1839941A (en) * | 1927-03-29 | 1932-01-05 | Zelezniak Wladyslaw | Centrifugal separator |
US2364171A (en) * | 1940-07-08 | 1944-12-05 | Black Clawson Co | Pulp screen |
GB779796A (en) * | 1954-03-03 | 1957-07-24 | Sunds Verkstaeder Aktiebolag | Improvements in or relating to the treatment of liquid suspensions |
US3092578A (en) * | 1959-01-16 | 1963-06-04 | Bird Machine Co | Screening apparatus |
FR1271054A (en) * | 1960-01-22 | 1961-09-08 | E Et M Lamort Fils | Classifying apparatus for the purification by sieving of liquids containing suspended solid particles and in particular cellulose pulps |
US3223239A (en) * | 1962-05-11 | 1965-12-14 | Bird Machine Co | Pressure type screening devices |
US3387708A (en) * | 1966-01-24 | 1968-06-11 | Beloit Corp | Paper machine screen |
-
1966
- 1966-10-03 US US583639A patent/US3456793A/en not_active Expired - Lifetime
-
1967
- 1967-09-06 GB GB40698/67A patent/GB1188726A/en not_active Expired
- 1967-09-29 ES ES345591A patent/ES345591A1/en not_active Expired
- 1967-09-30 DE DEB94748A patent/DE1298868B/en active Pending
- 1967-10-03 FR FR8712A patent/FR93277E/en not_active Expired
Non-Patent Citations (1)
Title |
---|
None * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0315737A1 (en) * | 1987-11-11 | 1989-05-17 | A. Ahlstrom Corporation | Method and apparatus for treating pulp |
US4952314A (en) * | 1987-11-11 | 1990-08-28 | A. Ahlstrom Corporation | Apparatus for treating pulp |
Also Published As
Publication number | Publication date |
---|---|
ES345591A1 (en) | 1968-11-16 |
US3456793A (en) | 1969-07-22 |
FR93277E (en) | 1969-03-07 |
GB1188726A (en) | 1970-04-22 |
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