US2901820A - Method of covering a drum filter, or such like, with wire gauze - Google Patents

Method of covering a drum filter, or such like, with wire gauze Download PDF

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Publication number
US2901820A
US2901820A US579320A US57932056A US2901820A US 2901820 A US2901820 A US 2901820A US 579320 A US579320 A US 579320A US 57932056 A US57932056 A US 57932056A US 2901820 A US2901820 A US 2901820A
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US
United States
Prior art keywords
drum
band
wire gauze
covering
filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US579320A
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English (en)
Inventor
Clarin Sidney
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Individual
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Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2901820A publication Critical patent/US2901820A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
    • B21F27/18—Making special types or portions of network by methods or means specially adapted therefor of meshed work for filters or sieves
    • 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
    • B01D33/067—Construction of the filtering drums, e.g. mounting or sealing arrangements
    • 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
    • Y10T29/49602—Coil wound wall screen
    • 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
    • Y10T29/49801—Shaping fiber or fibered material
    • 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
    • Y10T29/49874—Prestressing rod, filament or strand

Definitions

  • sucn LIKE, WITH wmn GAUZE Drum filters covered with metal wire netting, or socalled wire gauze, are known in the cellulose and wallboard industries.
  • the wire gauze has a width corresponding to the length of the drum, and this wire gauze is wound round the drum and the meeting edges are joined across the drum by means of a seam.
  • the wire gauze material must be made in different Widths, which entails great expenses.
  • the invention relates to a method of covering such drum filters with a wire gauze, which can be made in a standard width and delivered by the wire gauze manufacturers to the pulpmills in rolls.
  • the invention also aims at eliminating the difiiculties of obtaining an evenly stretched wire gauze onthe filter drum. These difiiculties are due to the fact that it is diificult to stretch a wire cloth of great breadth uniformly.
  • the invention is also concerned with avoiding fractures in the pulpweb caused by a transverse joint.
  • the new process is characterized by the wire gauze being wound spirally in the form of a band edge to edge along the sides of the band round the circumference of the drum.
  • the wire cloth can be made in the form of a band or belt with a width of to 30 cm., for example, or also be manufactured with a greater width and afterwards cut up into suitable widths of banding, and the bands can then be joined longitudinally, for example by soldering, welding or sewing, and be delivered in rolls from the wire manufacturer to the pulp mills.
  • the ends of the wire band spiral are cut off flush with the end peripheries of the filter drum.
  • the band is fixed lay soldering, or other suitable jointing, on to the filter cylinder which is caused to rotate at the same time as the band is being stretched.
  • the covering can be applied by winding two or more wire bands displaced or offset from one another, and in addition thereto the leading ends of the spiral windings are suitably offset to one another, for example at for two bands.
  • the ends of the band are fixed at the end of the cylinder in question by soldering, welding or by a stretching apparatus.
  • the ends of the band spiral are cut oil flush with the end peripheries of the drum.
  • the side edges of the bands can be reinforced by soldering or welding, or otherwise, in order to prevent the Wires of the wire cloth from becoming frayed.
  • the same measures can be taken with the cut end edges of the band spiral.
  • Fig. 1 shows the winding of a band intended to cover the filter drum according to the invention
  • Fig. 2 shows in the same way part of the filter surface covered by two bands wound on in pairs.
  • Fig. 1 thus shows in outline a wire gauze I wound on to drum 2 and with its longitudinal edges 3 meeting one another edge to edge. From this it will be seen that the section 4 indicated by dashes must be cut away.
  • Fig. 2 shows that a greater pitch is obtained by several bands 1, 5 of smaller width, which can be Wound spirally parallel and edgeways to one another.
  • a method of covering a drum filter or the like with a metallic wire gauze comprising the steps of cutting at least one band from a metallic wire gauze, forming a seam by heat treatment along the longitudinal edges of the band so as to prevent fraying of the edges, fixing one end of the band at one end edge of the drum, winding said band around the drum with adjacent turns in abutment, stretching the band longitudinally so as to press it against the drum surface along its entire length, fixing the other end of the band at the other end edge of the drum so as to maintain the band in stretched state, and cutting the band flush with the end edges of the drum.
  • a method of covering a drum filter or the like with a metallic wire gauze comprising the steps of winding at least two parallel bands of wire gauze around the outer surface of the drum with longitudinal edges of adjacent band turns in abutment and under a longitudinal tension so as to press said bands against the surface of the drum, fixing the ends of said parallel bands at the respective end edges of said drum, and cutting off the protruding ends of said bands flush with the end edges of the drum.
  • a method of covering a cyiindrical surface of a drum or the like with an extensible metallic gauze comprising the steps of fixing one end of at least one band of metallic wire gauze onto said drum, winding said wire gauze around the surface of the drum with the edges of adjacent turns in abutment, applying a stretching force so as to maintain said band along its entire length removably pressed against the drum surface owing to the action of said stretching force and attaching the other end of the band on the drum so as to maintain said stretching force.
  • a method of covering a drum filter or the like with a metallic wire gauze comprising the steps of cutting at least one band from a metallic wire gauze, forming seams by heat treatment along the longitudinal edges of the band so as to prevent fraying ofthe edges, Winding said band around the circumference of the drum with the edges of adjacent turns in abutment, simultaneously'stretchin'g said band so that the longitudinal tension will press it tightly against the surface of the drum, and attaching said band at its respective ends to the drum so as to maintain said longitudinal tension.
  • a method of covering a drum filter or the like with an extensible metallic gauze comprising the steps of cutting at least one band from a metallic Wire gauze, forming seams by heat treatment along the longitudinal edges of the band so as to prevent fraying of the edges, fixing one end of said at least one band onto the drum, winding said wire gauze around the surface of the drum Withthe edges of adjacent turns in abutment, stretching said band so as to press its entire length against the drum surface, and fixing the other end of the band on the drum so as 5 to maintain the band in said stretched state.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Wire Processing (AREA)
US579320A 1955-05-24 1956-04-19 Method of covering a drum filter, or such like, with wire gauze Expired - Lifetime US2901820A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2901820X 1955-05-24

Publications (1)

Publication Number Publication Date
US2901820A true US2901820A (en) 1959-09-01

Family

ID=20427735

Family Applications (1)

Application Number Title Priority Date Filing Date
US579320A Expired - Lifetime US2901820A (en) 1955-05-24 1956-04-19 Method of covering a drum filter, or such like, with wire gauze

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US (1) US2901820A (enrdf_load_stackoverflow)
BE (1) BE547695A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163706A (en) * 1949-04-27 1964-12-29 Preformed Line Products Co Method and means for utilizing helical armor rods
US3921710A (en) * 1972-08-23 1975-11-25 Tokico Ltd Heat pipe and manufacturing method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0655493B2 (ja) * 1988-02-29 1994-07-27 帝人株式会社 易接着性ポリエステルフイルム及びその製造方法
US4882056A (en) * 1988-04-01 1989-11-21 Pall Corporation Fluid filter element with an overlapped wrap

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1942304A (en) * 1932-01-23 1934-01-02 Allen Sherman Hoff Co Shaft and process of applying noncorrosive metallic sheathing thereto
GB449093A (en) * 1934-12-19 1936-06-19 George Henry Clifford Corner Improvements in or relating to the manufacture of sliding clasp fasteners
US2095599A (en) * 1935-02-21 1937-10-12 American Steel & Wire Co Method of making flexible conduits for cable controls
US2242326A (en) * 1939-04-28 1941-05-20 Rosenthal Morris Metallic wool pad
US2295420A (en) * 1939-10-25 1942-09-08 American Cast Iron Pipe Co Process of wrapping pipe
US2711575A (en) * 1951-06-15 1955-06-28 Minnesota & Ontario Paper Co Method for covering cylinders with foraminous materials

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1942304A (en) * 1932-01-23 1934-01-02 Allen Sherman Hoff Co Shaft and process of applying noncorrosive metallic sheathing thereto
GB449093A (en) * 1934-12-19 1936-06-19 George Henry Clifford Corner Improvements in or relating to the manufacture of sliding clasp fasteners
US2095599A (en) * 1935-02-21 1937-10-12 American Steel & Wire Co Method of making flexible conduits for cable controls
US2242326A (en) * 1939-04-28 1941-05-20 Rosenthal Morris Metallic wool pad
US2295420A (en) * 1939-10-25 1942-09-08 American Cast Iron Pipe Co Process of wrapping pipe
US2711575A (en) * 1951-06-15 1955-06-28 Minnesota & Ontario Paper Co Method for covering cylinders with foraminous materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163706A (en) * 1949-04-27 1964-12-29 Preformed Line Products Co Method and means for utilizing helical armor rods
US3921710A (en) * 1972-08-23 1975-11-25 Tokico Ltd Heat pipe and manufacturing method thereof

Also Published As

Publication number Publication date
BE547695A (enrdf_load_stackoverflow)

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