US3477477A - Sieve for paper-making machines - Google Patents

Sieve for paper-making machines Download PDF

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Publication number
US3477477A
US3477477A US551693A US3477477DA US3477477A US 3477477 A US3477477 A US 3477477A US 551693 A US551693 A US 551693A US 3477477D A US3477477D A US 3477477DA US 3477477 A US3477477 A US 3477477A
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US
United States
Prior art keywords
filaments
connections
sieve
screen
paper
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
US551693A
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English (en)
Inventor
Bernhard Domin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Plate Chemische Fabrik GmbH
Plate Chem Fab Dr GmbH
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Plate Chem Fab Dr GmbH
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 Plate Chem Fab Dr GmbH filed Critical Plate Chem Fab Dr GmbH
Application granted granted Critical
Publication of US3477477A publication Critical patent/US3477477A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/10—Wire-cloths
    • 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
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/10—Wire-cloths
    • D21F1/12—Seams thereof
    • D21F1/14—Seams thereof welded
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/903—Paper forming member, e.g. fourdrinier, sheet forming member

Definitions

  • This invention relates to woven structures such as screens or sieves made from synthetic filaments, and particularly to so-called wires for paper-making machines, which consist of a web of woven material joined together at its ends to form an endless belt or screen.
  • the present invention provides a screen or sieve woven from synthetic filaments and, more particularly, a Wire for paper-making machines, which comprises an endless web of woven material the connections between the ends of the individual warp filaments being distributed over a large area of the web and the warp filaments being connected together at their end faces pointing in the filament direction independently of the weft filaments.
  • the connections between the individual warp filaments are distributed over a relatively large area of the web in such a way that several connections do not lie immediately adjacent each other in one row, so that instead of the usual linear joint, the warp filaments at the ends of the screen are connected together in a staggered relationship. If however there are two connections directly adjacent one another, there is still room for movement or yield towards the sides, because other connections are located further away.
  • the warp connections are alternately arranged in pairs, and not in random order, in one row at either end of the joint. Although imprints could in this case be left behind by the two rows formed by the connections, they would only appear as a dotted line at the ends of the joint.
  • FIG. 1 shows in perspective an endless sieve in a paper-making machine
  • FIGS. 2 to 5 are plan views, on enlarged scales of sections from diiferent paper machine wires or screens, embodying various possibilities of connecting the warps together to form an endless "screen or sieve.
  • FIG. 1 In FIG. 1 is shown an endless sieve 8 of which a part 9 is somewhat enlarged.
  • Each screen is woven in known manner from warp filaments A and weft filaments B made from a synthetic material.
  • connections C have been shaded in the drawings.
  • warp connections C Two rows and five rows, respectively, of warp connections C are shown at the upper and lower ends, respectively, of FIGURE 2.
  • the warp filaments are connected together by cutting them at an angle and bonding them together.
  • Rows 1 and 2 are separated from rows 3 to 7 by eleven mesh divisions. The number of connections is irregularly distributed in all the rows.
  • FIG. 3 shows another example, incorporating four rows 1 to 4 of connections C between warp filaments cut at an angle.
  • the rows in each group 1-2 and 34 are separated from one another by two mesh divisions, while group 12 is separated from group 3-4 by thirteen mesh divisions.
  • FIG. 4 shows a six-row arrangement of connections in which the two outer rows 1 and 6 have as many connections C as the four inner rows 2 to 5 together.
  • FIG. 5 there are only two rows of connections between Warp filaments cut at an angle. These two rows are separated from one another by nineteen mesh divisions. In this case, the connections are alternately formed in pairs, and not in random order, in one row 1 or 2 at either end of the joint.
  • Each of the examples illustrated embodies the principle of the invention, namely to form the connections between the warp filaments not in a line, as is the case with welded metal wires, but over an area with at least one uninterrupted mesh division and covering several wefts. This avoids an accumulation of bonds while the permeability of the screen as a whole remains practically uniform.
  • the points at which they are bonded together remain largely unaffected by tensile forces because the entire woven or plaited structure carries the mesh field. This is another important advantage of the large-area screen joint.
  • the warp filaments in this zone are not replaced or temporarily removed, the warp filaments always fit exactly back into the kinks in the weft filaments, so that neither the mesh pattern nor the surface of the screen are altered at the screen joint.
  • the entire screen is advantageously coated with a plastic solution, preferably a polyurethane composition, after the warps have been bonded together.
  • the coating can be hardened at normal temperature or at elevated temperature. As a result, the warp and weft filaments are bonded together at their intersections, so that the strength of the screen joint is increased and the mesh pattern is kept intact.
  • An endless sieve for paper-making machines comprising woven synthetic warp and weft filaments, in which, independently of the weft filaments, the warp filaments are connected together at end abutting faces pointing in the longitudinal direction of said warp filaments, said warp filaments and said weft filaments remaining in their original woven positions, the connections between said warp filaments being arranged in at least two separate groups each including at least one row such that the connections of the warp filaments are not all in the same row, said groups being separated from one another by at least two mesh divisions, the connections between adjacent rows in each group being spaced by at least one intact mesh division, said abutting ends being inclined at an angle with regard to the longitudinal direction of the filaments and being disposed intermediate adjacent weft filaments.

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  • Paper (AREA)
  • Woven Fabrics (AREA)
US551693A 1965-05-25 1966-05-20 Sieve for paper-making machines Expired - Lifetime US3477477A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP36884A DE1233240B (de) 1965-05-25 1965-05-25 Aus Kunststoff-Faeden gewebtes Sieb od. dgl.

Publications (1)

Publication Number Publication Date
US3477477A true US3477477A (en) 1969-11-11

Family

ID=7374994

Family Applications (1)

Application Number Title Priority Date Filing Date
US551693A Expired - Lifetime US3477477A (en) 1965-05-25 1966-05-20 Sieve for paper-making machines

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US (1) US3477477A (instruction)
DE (1) DE1233240B (instruction)
GB (1) GB1109600A (instruction)
SE (1) SE315488B (instruction)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858623A (en) * 1969-06-10 1975-01-07 Huyck Corp Papermakers fabrics
US4728530A (en) * 1986-01-10 1988-03-01 Hermann Wangner Gmbh & Co. Kg Method for mending damaged areas in papermachine fabrics
WO2007131312A3 (en) * 2006-05-16 2009-04-02 Petropasy Tecnologia Em Poliur Abrasion-resistant thermoset polyurethane elastomer formulation, process and article

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE11073C (de) * 1880-04-16 1880-09-30 P. TELTOW in Stettin Obstabpflücker
US926004A (en) * 1908-01-06 1909-06-22 Wilhelm Keller Method of joining or connecting fabrics.
DE767619C (de) * 1938-12-23 1952-11-24 Ig Farbenindustrie Ag Siebgewebe oder -geflechte
US2748445A (en) * 1952-12-24 1956-06-05 F C Huyck & Sons Spliced woven fabrics and method of splicing the same
US3060547A (en) * 1959-10-23 1962-10-30 Johnson Wire Works Ltd Woven mesh joint forming
GB949779A (en) * 1959-05-14 1964-02-19 Lindsay Wire Weaving Co Improved woven wire belt for a fourdrinier machine
DE1186730B (de) * 1963-11-08 1965-02-04 Wangner Fa Hermann Endloses Sieb

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE660162C (de) * 1936-02-12 1938-05-19 Oberdorfer Fa F Verbindung der Drahtenden von Drahtgeweben, insbesondere Metalltuechern fuer die Papierfabrikation

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE11073C (de) * 1880-04-16 1880-09-30 P. TELTOW in Stettin Obstabpflücker
US926004A (en) * 1908-01-06 1909-06-22 Wilhelm Keller Method of joining or connecting fabrics.
DE767619C (de) * 1938-12-23 1952-11-24 Ig Farbenindustrie Ag Siebgewebe oder -geflechte
US2748445A (en) * 1952-12-24 1956-06-05 F C Huyck & Sons Spliced woven fabrics and method of splicing the same
GB949779A (en) * 1959-05-14 1964-02-19 Lindsay Wire Weaving Co Improved woven wire belt for a fourdrinier machine
US3060547A (en) * 1959-10-23 1962-10-30 Johnson Wire Works Ltd Woven mesh joint forming
DE1186730B (de) * 1963-11-08 1965-02-04 Wangner Fa Hermann Endloses Sieb

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858623A (en) * 1969-06-10 1975-01-07 Huyck Corp Papermakers fabrics
US4728530A (en) * 1986-01-10 1988-03-01 Hermann Wangner Gmbh & Co. Kg Method for mending damaged areas in papermachine fabrics
WO2007131312A3 (en) * 2006-05-16 2009-04-02 Petropasy Tecnologia Em Poliur Abrasion-resistant thermoset polyurethane elastomer formulation, process and article

Also Published As

Publication number Publication date
SE315488B (instruction) 1969-09-29
GB1109600A (en) 1968-04-10
DE1233240B (de) 1967-01-26

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