US20010020600A1 - Screen and process for manufacturing a screen of this kind - Google Patents

Screen and process for manufacturing a screen of this kind Download PDF

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Publication number
US20010020600A1
US20010020600A1 US09/776,320 US77632001A US2001020600A1 US 20010020600 A1 US20010020600 A1 US 20010020600A1 US 77632001 A US77632001 A US 77632001A US 2001020600 A1 US2001020600 A1 US 2001020600A1
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United States
Prior art keywords
rods
screen
rod
supporting elements
protrusions
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.)
Abandoned
Application number
US09/776,320
Inventor
Helmuth Gabl
Axel Pichler
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Andritz AG
Original Assignee
Andritz AG
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Filing date
Publication date
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Assigned to ANDRITZ AG reassignment ANDRITZ AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GABL, HELMUTH, PICHLER, AXEL
Publication of US20010020600A1 publication Critical patent/US20010020600A1/en
Priority to US10/821,831 priority Critical patent/US7125491B2/en
Abandoned legal-status Critical Current

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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
    • D21D5/16—Cylinders and plates for screens
    • 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
    • B01D29/114—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 arranged for inward flow filtration
    • B01D29/115—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 arranged for inward flow filtration open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
    • 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
    • B01D29/117—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 arranged for outward flow filtration
    • B01D29/118—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 arranged for outward flow filtration open-ended
    • 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
    • B01D29/56—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 series connection
    • B01D29/58—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 series 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
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
    • B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
    • 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
    • B01D29/902—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 containing fixed liquid displacement elements or cores
    • 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
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
    • B01D33/41—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in series connection
    • B01D33/42—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in series connection concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/466—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/68—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
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
    • B01D33/722—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
    • B01D33/727—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding provoking a tangential stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/20—Stationary drums with moving interior agitators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • B07B1/24—Revolving drums with fixed or moving interior agitators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/496—Multiperforated metal article making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/4987—Elastic joining of parts

Definitions

  • the invention is thus characterized by the rods having protrusions in the side walls which extend into inversely shaped recesses in the supporting element.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Filtering Materials (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Glass Compositions (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A flat or cylindrical screen includes rods and rod-bearing supporting elements. The rods have protrusions in the side walls which are received into inversely shaped recesses in a supporting element. The screen is manufactured by bending the supporting elements open elastically and inserting the rods, whereupon the supporting elements spring back, encircle the rods positively and form a screen mat.

Description

    BACKGROUND OF THE INVENTION
  • This invention relates generally to apparatus for cleaning pulp suspensions. More particularly, the present invention relates to screens for cleaning pulp suspensions process for manufacturing screen of this kind Various types of screen are known. For example WO 98/14658 discloses a screen which comprises a number of rods and supporting elements, where the supporting elements have slots. In this case the supporting elements take the shape of a U-shaped profile, which means that part of these rods must undergo plastic deformation in order to secure the rods to the supporting elements. A different kind of screen is known from DE 44 35 538 A1 which discloses rods secured with positive locking by clamping due to plastic deformation of the rod-supporting elements. In addition flat or cylindrical (centripetal or centrifugal) screens are known, where the rods are attached by welding to the rod-supporting elements. This form of fastening, however leads to a series of disadvantages because considerable welding stress is transferred to the components during welding and this causes distortion of the entire screen body. Furthermore, the fastening effect is not always guaranteed because the welds may begin to break up under certain circumstances and in the course of time due to signs of wear. The manufacturing process itself is actually very complicated and time consuming, and it Is very difficult in particular to set the supporting width precisely between two adjacent screen rods. [0001]
    • SUMMARY OF THE INVENTION
  • The aim of the invention is thus to create a screen that does without plastic deformation of the rods and/or supporting elements and without welds. In addition, a simple manufacturing process for this type of screen is to be developed. [0002]
  • The invention is thus characterized by the rods having protrusions in the side walls which extend into inversely shaped recesses in the supporting element. Thus, a fixed connection can be created with form closure without the need for welding or plastic deformation. [0003]
  • An advantageous further development of the invention is characterized by the protrusions being circular or elliptical and preferably having a radius r of 0.1 mm<r<2 mm. As a result, it is possible to mount the rods easily without deformation of the supporting elements, which also permits manufacture at low cost. The rods can be inserted easily, whereby the circular or elliptical formed protrusions lead to a more even area pressure and therefore to a good fixed connection with the supporting elements. [0004]
  • An advantageous configuration of the invention is characterized by the spacing h[0005] 1 between the protrusions and the imbedded end of the rod preferably measuring at least 0.1 mm<h1<6 mm. This makes the rod more resistant to vibration.
  • A favorable configuration of the invention is characterized by three or more protrusions with the respective recesses being provided on one side wall. This means that a secure form closure can be achieved. [0006]
  • A favorable further development of the invention is characterized by a different number of protrusions being provided on either side of the rods. This guarantees a better fastening effect en the event of one-sided inflow. [0007]
  • An advantageous further development of the invention is characterized by the supporting elements having a T or I shape. These shapes provide a larger screen area. [0008]
  • A favorable configuration of the invention is characterized by the rods, which have a total height H, protruding into the supporting element to a height h, where the relationship of h to H is preferably greater than 0.5. This protects the rod more effectively against flow forces. [0009]
  • An advantageous configuration of the invention is characterized by the bottom part of the rod being pressed together with the supporting element. This provides even better stability at higher forces. [0010]
  • The invention also refers to a process for manufacturing a screen of this kind, characterized by the supporting elements being bent open elastically and the rods inserted, whereupon the supporting elements spring back, encircle the rods positively and form a screen mat. Thus, a screen mat can be formed easily without welding or pressing, where it is possible to position the rods exactly and thus, obtain low tolerances. [0011]
  • An advantageous further development of the invention is characterized by the screen mat being rolled together to form a cylinder[0012]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The present invention may be better understood and its numerous objects and advantages will become apparent to those skilled in the art by reference to the accompanying drawings in which: [0013]
  • FIG. 1 is a cross section view of a screen in accordance with the invention; and [0014]
  • FIG. 2 is a cross section view taken along line II-II of FIG. 1.[0015]
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • FIG. 1 illustrates an example of three rods [0016] 1, mounted in supporting elements 2. The right-hand rod 1 shows that it has several protrusions 3 with a radius r on both side walls. The supporting element contains recesses 4 with exact inverse shaping and the necessary clearance distances in relation to the screen basket diameter. The present illustration shows two protrusions and two recesses on each side, however there can also be three or more such protrusions and recesses if necessary. The number of protrusions on either side may also differ. These protrusions with a circular or elliptical segment shape have a radius r to which 0.1 mm<r<2 mm applies. The rods can be inserted easily, whereby the circular or elliptical formed protrusions lead to a more even area pressure and therefore to a good fixed correction with the supporting elements.
  • The middle rod in FIG. 1 shows the length measurements of the rod, which has an overall height H. The protrusions are spaced at a distance h[0017] 1 to which 0.1 mm<h1<6 mm applies, from the imbedded end of the rod. The rod 1 projects into the supporting element with a height h, where the ration of h to H should preferably be larger than 0.5. The projecting section of the rod on the side facing away from the flow can be pressed together with the surfaces 5 of the supporting element to obtain better fastening. This applies if the supporting element 2 is made in a T shape. If an I shape is used, the rod 1 is not pressed together. The supporting element 2 can also be made in other shapes than a T or I, e.g. square. rectangular. square with rounded corners, rectangular with rounded corners, with the rounding on only one or on several corners. The protrusions provided in the supporting element 2 to hold the rod 1 can have clearance equivalent to the angle α on the side facing away from the flow. With the cylindrical shape of the screen basket this avoids plastic deformation in the supporting element 2.
  • FIG. 2 shows a section through the line marked II-II in FIG. 1, where the T shape of the supporting element [0018] 2 and one rod 1 are visible. On the surface 5 this rod 1 can be pressed together with the supporting element 2 if necessary.
  • The connection between rods and supporting elements is essentially positive, i.e. without plastic deformation of the individual components or additional connecting links, such as weld seams. A screen of this type can be made, for example, by pressing the rods together with the supporting elements until they lock into place. Another form of manufacture is to bend the supporting elements open elastically so that the recesses [0019] 6 for the rods expand and the individual rods 1 can be inserted. When the supporting elements have sprung back into place, a level screen mat is formed by the clamped profile rods. Thanks to the above mentioned design as snap connection, this process permits the rods 1 to be inserted precisely into the supporting elements 2, thus lowering the slot width tolerances. If this level screen is then shaped into a screen basket, the clamping effect is increased further due to the bending radios when the screen is rolled up. Pressing the protruding ends of the rods together with the supporting elements 2 increases the stability of the screen mat further. The supporting elements 2 can also be shaped as rings with the protrusions 6 according to the invention worked into these rings, where the dimensions are somewhat smaller than specified, i.e. the protrusions 6 are slightly smaller than the rods 1. Subsequently the rings are nicked at one point and bent open far enough for the rods to lock into place. When the rings have bent back into place, they can be welded together to form a basket.
  • The invention is not limited to the examples presented. On the contrary, the protrusions [0020] 3 in the rods 1 can be shaped at will as long as they engage in the inversely identical recesses in the supporting element. The rods 1 can also take any shape from a rectangle to a triangle.
  • While preferred embodiments have been shown and described, various modifications and substitutions may be made thereto without departing from the spirit and scope of the invention. Accordingly, it is to be understood that the present invention has been described by way of illustration and not limitation. [0021]

Claims (12)

What is claimed is:
1. A screen comprising
a plurality of rods, each of the rods having side walls, at least one of the side walls defining at least one protrusion; and
at least one rod-bearing supporting element having at least one recess having a shape which is complementary to the protrusion of the rod;
wherein each protrusion of the rod is received within a recess of the supporting element.
2. The screen according to
claim 1
, wherein each protrusion has a circular or elliptic shape.
3. The screen according to
claim 1
, wherein each of the rods has an imbedded end and at least one of the rods has a plurality of protrusions, the protrusions being positioned at a distance h1 from the imbedded end of the rod, wherein 0.1 mm<h1<6 mm.
4. The screen according to
claim 1
, wherein the supporting element has at least one side wall and at least one of the rods has three or more protrusions received within recesses in one side wall of the supporting element.
5. The screen according to
claim 1
, wherein each of the rods has oppositely disposed first and second sidewalls, each having at least one protrusion, the first sidewall having a different number of protrusions than the second side wall.
6. The screen according to
claim 1
, wherein the supporting elements each have a T-shape.
7. The screen according to
claim 1
, wherein each of the rods has a total height H and an imbedded portion protruding into the supporting element having a height h, where the ratio of h to H is greater then 0.5.
8. The screen according to
claim 1
, wherein each of the rods has an imbedded portion pressed together with the supporting element.
9. Process for manufacture of a screen according to
claim 1
 comprising the steps of:
bending open the supporting elements elastically;
inserting a portion of each rod into one of the open supporting elements; and
allowing the supporting elements to spring back, wherein the supporting elements encircle the portion of each rod and form a screen mat.
10. Process according to
claim 9
, comprising the additional step of rolling the screen mat to form a cylinder.
11. The screen according to
claim 2
, wherein the protrusions have a radius r of 0.1 mm<r<2 mm.
12. The screen according to
claim 1
, wherein the supporting elements each have an I-shape.
US09/776,320 2000-02-03 2001-02-02 Screen and process for manufacturing a screen of this kind Abandoned US20010020600A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/821,831 US7125491B2 (en) 2000-02-03 2004-04-09 Screen and process for manufacturing a screen of this kind

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA165/2000 2000-02-03
AT0016500A AT408773B (en) 2000-02-03 2000-02-03 SCREEN AND METHOD FOR PRODUCING SUCH A SCREEN

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/821,831 Continuation-In-Part US7125491B2 (en) 2000-02-03 2004-04-09 Screen and process for manufacturing a screen of this kind

Publications (1)

Publication Number Publication Date
US20010020600A1 true US20010020600A1 (en) 2001-09-13

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US09/776,320 Abandoned US20010020600A1 (en) 2000-02-03 2001-02-02 Screen and process for manufacturing a screen of this kind
US09/776,194 Expired - Fee Related US6669025B2 (en) 2000-02-03 2001-02-02 Screen

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Application Number Title Priority Date Filing Date
US09/776,194 Expired - Fee Related US6669025B2 (en) 2000-02-03 2001-02-02 Screen

Country Status (8)

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US (2) US20010020600A1 (en)
EP (1) EP1122359B1 (en)
CN (1) CN1198675C (en)
AT (2) AT408773B (en)
BR (1) BR0100353A (en)
CA (1) CA2332667A1 (en)
DE (1) DE50106281D1 (en)
MX (1) MXPA01001295A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020148763A1 (en) * 2001-04-16 2002-10-17 Lutz Mark S. Screen cylinder and method
AU2018303343B2 (en) * 2017-07-20 2020-03-19 Aqseptence Group Pty Ltd A screen

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050205486A1 (en) * 2004-03-18 2005-09-22 Jan Melin Filter device
EP1576996A1 (en) * 2004-03-18 2005-09-21 Hardi International A/S A filter device
FI117867B (en) * 2004-12-10 2007-03-30 Metso Paper Inc Sorter and method for sorting the pulp
DE102011078655A1 (en) * 2011-07-05 2013-01-10 Voith Patent Gmbh indicator rod
CN105879449B (en) * 2016-05-26 2018-02-06 江苏兴隆防腐设备有限公司 coarse filtration kettle
CN107142770A (en) * 2017-05-31 2017-09-08 瑞安市金邦喷淋技术有限公司 The ring flange of paper machine screen cylinder and the attachment structure of diversion screen rod
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US20010017274A1 (en) 2001-08-30
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BR0100353A (en) 2001-10-02
ATE296377T1 (en) 2005-06-15
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CA2332667A1 (en) 2001-08-03
US6669025B2 (en) 2003-12-30

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