US3876500A - Fourdrinier paper-making machine with water-control base wire positioned beneath forming wire - Google Patents

Fourdrinier paper-making machine with water-control base wire positioned beneath forming wire Download PDF

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Publication number
US3876500A
US3876500A US352314A US35231473A US3876500A US 3876500 A US3876500 A US 3876500A US 352314 A US352314 A US 352314A US 35231473 A US35231473 A US 35231473A US 3876500 A US3876500 A US 3876500A
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US
United States
Prior art keywords
wire
fourdrinier
stringer
fourdrinier wire
combination
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
US352314A
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English (en)
Inventor
Elemer Csordas
Dieter Egelhof
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JM Voith GmbH
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JM Voith GmbH
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Filing date
Publication date
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Publication of US3876500A publication Critical patent/US3876500A/en
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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
    • D21F1/48—Suction apparatus
    • D21F1/52—Suction boxes without rolls
    • D21F1/523—Covers thereof
    • D21F1/526—Covers thereof consisting of endless moving belts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/02—Complete machines for making continuous webs of paper of the Fourdrinier type

Definitions

  • the base wire is so constituted or of such material as to attract water from the Fourdrinier wire by capillary action, such as a felt or a synthetic p1astic wire of close-meshed construction.
  • An adjusting arrangement including a spray tube and suction box acts upon the second stringer to permit adjustment of the content of water in the base wire.
  • Another object of the present invention is to provide such an improved machine wherein the quantity of water removed from the stock on the Fourdrinier wire is selectable and adjustable at will.
  • a Fourdrinier paper-making machine in a combination comprising a Fourdrinier wire travelling in a path, and a stock inlet for admitting aqueous paper stock onto the Fourdrinier wire.
  • a travelling base wire is provided. having a first stringer arranged to travel in contact with the Fourdrinier wire along a portion of the path, and a second stringer arranged to travel out of contact with the Fourdrinier wire,
  • the base wire is so constituted as to attract water from the Fourdrinier wire by capillary action.
  • Adjusting means acts upon the second stringer for adjusting the content of water in the base wire.
  • the invention largely eliminates the effect on pressure surges of any supporting means which may be disposed either under the Fourdrinier wire or under the base wire, so that any pressure peaks whichmay occur at locations where such supporting means is present will no longer act on the developing paper layer on the Fourdrinier wire with such effect as to cause irregularities. porosity or the formation of pinholes in the paper.
  • the base wire is already substantially saturated with water at the location at which the aqueous paper stock contacts the Fourdrinier wire. then the fibers in the stock willisettle only slowly on the Fourdrinier wire due to the reduction in the rate at which water passes through the Fourdrinier wire.
  • Such reduction is, of course, the result of the fact that the base wire is capable of attracting only little or no water by capillary action. owing to its saturated or near-saturated state, Conversely. if the base wire is relatively less saturated. then the formation of the paper material on the Four drinier wire will be accelerated. because the base wire then obviously is able to take up a larger quantity of water from the aqueous paper stock. that is water which passes through the Fourdrinier wire. and it is able to do so faster than otherwise.
  • the dewatering characteristics in their entirety can be influenced by appropriate adjustment of the water content of the base wire, for which purpose the adjusting means according to the present invention is provided.
  • the base wire may, according to the present invention, be in form of a felt material which is capable of exerting relatively significant capillary forces upon the water of the aqueous paper stock deposited on the Fourdrinier wire. Moreover, such material has, of course, a relatively large water-absorption capacity which insures very adequate control of the de-watering of the paper web which is being formed on the Fourdrinier wire.
  • the invention also contemplates the use of a web of synthetic plastic fabric as the base wire, if the fabric has a sufficiently close-meshed construction and adequate thickness to permit capillary forces to act, and to provide an adequate water storage capability.
  • the invention may be embodied in a papermaking machine having one, two or more Fourdrinier wires, each of which is associated with a stock inlet.
  • FIG. 1 is a fragmentary diagrammatic view illustrating a detail of a Fourdrinier paper-making machine according to one embodiment of the invention
  • FIG. 2 is a view analogous to FIG. 1 but illustrating a further embodiment of the invention.
  • FIG. 3 is a view similar to FIG. 2 but illustrating an additional embodiment of the invention.
  • the Fourdrinier wire is designated with reference numeral 1 and advances in the direction indicated by its associated arrow. It is trained around a breast roll 2 and in the zone of this roll a stock inlet 3 is provided which discharges onto the Fourdrinier wire 1 an aqueous paper stock, that is an aqueous fiber suspension. A base wire 4 is provided which also passes around the breast roll 3 underneath the Fourdrinier wire I, with which one of the stringers of the base wire 4 is in contact so as to move therewith.
  • the aforementioned stringer continues to move with the Fourdrinier wire 1 in the path of the latter until the end of the sheebforming zone (the zone in which paper sheet is formed on the Fourdrinier wire 1) is reached.
  • the end of the sheet-forming zone is intended to designate the region at which the relative position of the fibers on the Fourdrinier wire 1 will no longer substantially alter with progressive de-watering.
  • Adjusting means is provided and acts upon the other stringer of the base wire 4, that is that stringer which is not in contact with the Fourdrinier wire 1.
  • the adjusting means serve to adjust and control the water content of the base wire 4, utilizing a suction box 5 and a spray tube 6 which are positioned relative to the base wire 4 in the manner illustrated in FIG. 1.
  • a further suction box 7 is provided to act upon the stringer of the base wire 4 which is not in contact with the Fourdrinier wire 1.
  • a suction box 7 acts upon that side of the base wire 4 which has previously been in engagement with the Fourdrinier wire 1 to remove the fine fraction.
  • the base wire 4 and the Fourdrinier wire I are guided together in the region between the breast roll 2 and their point of separation, over supporting means 8 which may have a plurality of boxes into which further water from the Fourdrinier wire can run off.
  • the free stringer of the base wire 4, that is the stringer which is not in Contact with the Fourdrinier wire 1 passes over a plurality of guide rollers 9, and a guide portion 10 having a guide surface, which may be integrally formed with the supporting means 8, is provided at the location where the contacting stringer of the base wire 4 separates from the Fourdrinier wire 1.
  • the base wire 4 may be a felt web, or it may be a web of synthetic plastic textile material of appropriate thickness and of a mesh which is sufficiently fine to provide for the desired capillary action.
  • the material of the base wire 4 must be capable of storing that amount of attracted water which it is anticipated will be removed by the base wire from the stock on the Fourdrinier wire.
  • FIG. 2 there are provided two substantially identical Fourdrinier wires 1, each of which corresponds to the wire 1 of FIG. 1.
  • a guide roller 11 is provided at the region where the base wire 4 associated with one of the Fourdrinier wires 1 (the right-hand one) separates from the latter.
  • a guide element 12 which, unlike the embodiment of FIG. I, is separate from the supporting means 8.
  • Each of the Fourdrinier wires 1 in this embodiment is provided with its own stock inlet 3, and the direction of advancement of the Fourdrinier wires 1 (which again corresponds to the direction of advancement of the respective base wires 4) is indicated by their associated arrows.
  • the adjusting means here may again be in form of the suction boxes 5 and spray conduits 6, or it may be replaced with pressure rollers 13, or both these measuresmay be utilized in conjunction with one another.
  • FIG. 3 shows a further embodiment wherein the contacting stringer of the base wire 4 is guided away from the Fourdrinier wire 1 by the guide portion 10 of the supporting means 8 at one location, to move past a suction box 7 which is thus seen to be located downstream of a first de-watering region.
  • the base wire 4 is thereupon guided around guide roller 9 and reversing roller 13 back into engagement with the Fourdrinier wire 1, to define with the same a second dewatering region, to be finally guided away again from the Fourdrinier wire 1 by the guide portion 10 of the second illustrated support means 8. It then passes over another suction box 7 and the free noncontacting stringer then again is subjected to adjustment of its water content which was attracted by capillar action, by the adjusting means 5,6.
  • One of the guide rollers 9 in this as in the preceeding embodiments may be constructed as a driving roller for the base wire 4, in which case a separate cooperating nip roller may be provided which cooperates with the driving roller.
  • the base wire may surround the suction roller of the machine (not illustrated. being located towards the left in FIG. 3) together with the Fourdrinier wire 1, before it finally becomes separated from the latter.
  • the necessary degree of de-watering for the deposited paper on the Fourdrinier wire 1 will nevertheless be obtained in such condition. due to the interposed suction box 7 located downstream of the first but upstream of the second de-watering section.
  • the base wire 4 is shown as surrounding the breast roll 2, together with the Fourdrinier wire 1.
  • the base wire 4 be guided in contact with the Fourdrinier wire 1 only downstream of the breast roll 2. in this case. however, the stock inlet 3 is then not arranged in the region of the breast roll, but only in that region where the Fourdrinier wire 1 and the base wire 4 are in contact with each other.
  • a combination comprising a Fourdrinier wire travelling in a path; a stock inlet for discharging aqueous paper stock onto said Fourdrinier wire; a travelling base wire means having a first stringer arranged to travel in contact with said Fourdrinier wire along a portion of said path which has an upstream and downstream end, and a second stringer arranged to travel out of contact with said Fourdrinier wire, said base wire means being operative for withdrawing water from said Fourdrinier wire by capillary action and for storing the thus withdrawn water within itself; deflecting means for deflecting said first stringer intermediate said ends first out of and thereupon back into engagement with said Fourdrinier wire: means for removing water from said first stringer while the same is out of engagement with said Fourdrinier wire; and adjusting means acting upon said second stringer for adjusting the content of water in said base wire means.
  • a combination as defined in claim 1' further comprising a breast roller about which said Fourdrinier wire and said first stringer of said base wire means are both trained; and wherein said stock inlet is arranged to discharge said stock onto said Fourdrinier wire in the region of said breast roller.
  • said base wire means is a web of synthetic plastic textile material.
  • a combination as defined in claim 1' and further comprising means arranged at a downstream end of said portion of said path, in engagement with said base wire means for deflecting the same away from said Fourdrinier wire.
  • a combination as defined in claim 10; and means maintaining each first stringer of the respective base wire is in contact with the associated Fourdrinier wire from the respective breast roller to a location downstream of the latter beyond which the fibers of said stock no longer appreciably change their relative positions during de-watering.

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US352314A 1972-04-20 1973-04-19 Fourdrinier paper-making machine with water-control base wire positioned beneath forming wire Expired - Lifetime US3876500A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2219302A DE2219302B2 (de) 1972-04-20 1972-04-20 Langsieb-Papiermaschine

Publications (1)

Publication Number Publication Date
US3876500A true US3876500A (en) 1975-04-08

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ID=5842672

Family Applications (1)

Application Number Title Priority Date Filing Date
US352314A Expired - Lifetime US3876500A (en) 1972-04-20 1973-04-19 Fourdrinier paper-making machine with water-control base wire positioned beneath forming wire

Country Status (7)

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US (1) US3876500A (enExample)
JP (1) JPS4919105A (enExample)
AT (1) AT319731B (enExample)
DE (1) DE2219302B2 (enExample)
FR (1) FR2163268A5 (enExample)
GB (1) GB1428265A (enExample)
IT (1) IT980276B (enExample)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181616A (en) * 1975-11-17 1980-01-01 Albert Bahr Device for dewatering sludge or the like
US4212745A (en) * 1977-09-13 1980-07-15 Machinefabriek W. Hubert & Co. B.V. Belt filter
US4780184A (en) * 1985-10-22 1988-10-25 Tamfelt Oy Ab Method for the adjustment of the dewatering in the wire section of a paper machine
US4995944A (en) * 1988-09-16 1991-02-26 Dearborn Chemical Company Ltd. Controlling deposits on paper machine felts using cationic polymer and cationic surfactant mixture
US5223097A (en) * 1986-01-09 1993-06-29 W. R. Grace Ab Method for controlling pitch on a paper-making machine
US5466342A (en) * 1993-07-07 1995-11-14 Valmet Paper Machinery, Inc. Suction roll in a twin-wire zone of a web former and a twin-wire web former
US5626720A (en) * 1986-01-09 1997-05-06 W.R. Grace & Co.-Conn. Method for controlling pitch on a papermaking machine
US20130269898A1 (en) * 2010-12-17 2013-10-17 Oji Holdings Corporation Device for producing fibrous sheet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19634349C2 (de) * 1996-08-26 1999-04-01 Schultz Hans Joachim Dr Ing Siebpartie für eine Papiermaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1526094A (en) * 1922-12-28 1925-02-10 Joseph W Sheahan Felt cleaner
US1577897A (en) * 1924-12-12 1926-03-23 Danninger Alois Paper-making machine
US2028952A (en) * 1934-02-14 1936-01-28 Philip J Reimer Apparatus for and method of making paper

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1526094A (en) * 1922-12-28 1925-02-10 Joseph W Sheahan Felt cleaner
US1577897A (en) * 1924-12-12 1926-03-23 Danninger Alois Paper-making machine
US2028952A (en) * 1934-02-14 1936-01-28 Philip J Reimer Apparatus for and method of making paper

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181616A (en) * 1975-11-17 1980-01-01 Albert Bahr Device for dewatering sludge or the like
US4212745A (en) * 1977-09-13 1980-07-15 Machinefabriek W. Hubert & Co. B.V. Belt filter
US4780184A (en) * 1985-10-22 1988-10-25 Tamfelt Oy Ab Method for the adjustment of the dewatering in the wire section of a paper machine
US5223097A (en) * 1986-01-09 1993-06-29 W. R. Grace Ab Method for controlling pitch on a paper-making machine
US5626720A (en) * 1986-01-09 1997-05-06 W.R. Grace & Co.-Conn. Method for controlling pitch on a papermaking machine
US4995944A (en) * 1988-09-16 1991-02-26 Dearborn Chemical Company Ltd. Controlling deposits on paper machine felts using cationic polymer and cationic surfactant mixture
US5466342A (en) * 1993-07-07 1995-11-14 Valmet Paper Machinery, Inc. Suction roll in a twin-wire zone of a web former and a twin-wire web former
US5466343A (en) * 1993-07-07 1995-11-14 Valmet Paper Machinery, Inc. Suction element for a paper machine
US5466341A (en) * 1993-07-07 1995-11-14 Valmet Paper Machinery, Inc. Method for draining water from a paper web
US20130269898A1 (en) * 2010-12-17 2013-10-17 Oji Holdings Corporation Device for producing fibrous sheet
US8845862B2 (en) * 2010-12-17 2014-09-30 Oji Holdings Corporation Device for producing fibrous sheet

Also Published As

Publication number Publication date
IT980276B (it) 1974-09-30
AT319731B (de) 1975-01-10
JPS4919105A (enExample) 1974-02-20
GB1428265A (en) 1976-03-17
FR2163268A5 (enExample) 1973-07-20
DE2219302B2 (de) 1974-05-09
DE2219302A1 (de) 1973-10-31

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