US3864207A - Papermaking Machine Suction Box with Vibratory Movement having both Longitudinal and Vertical Components - Google Patents

Papermaking Machine Suction Box with Vibratory Movement having both Longitudinal and Vertical Components Download PDF

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Publication number
US3864207A
US3864207A US370621A US37062173A US3864207A US 3864207 A US3864207 A US 3864207A US 370621 A US370621 A US 370621A US 37062173 A US37062173 A US 37062173A US 3864207 A US3864207 A US 3864207A
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United States
Prior art keywords
suction
screen
top plate
box
upper run
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Expired - Lifetime
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US370621A
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English (en)
Inventor
Frans Hugo Ekberg
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Individual
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Individual
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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
    • 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
    • D21F1/18—Shaking apparatus for wire-cloths and associated parts
    • D21F1/20—Shaking apparatus for wire-cloths and associated parts in Fourdrinier machines

Definitions

  • ABSTRACT Suction boxes located beneath an endless forming wire in a papermaking machine are mounted on resilient supports, and are coupled to vibrators which impart movement to the suction boxes with components in the longitudinal direction of the forming wire and in the vertical direction, and of such resultant direction and amplitude that the suction-boxes at least in their highest position contact the underside of, and move in the same direction as, the forming wire.
  • the present invention refers to vibratory equipment for suction-boxes which are used, for example in papermaking machines, for dehydrating fibrous materials, such as wood pulp, which are advanced as an aqueous suspension on an endless screen, such as wire screen, running around front and rear end rolls and supported by a number of intermediate idling supporting rolls.
  • the principal object of the present invention is to bring about a substantial reduction of the drag exerted by a water-removing suction-box in paper-making machines, or similar machines, on the screen moving across said suction-box, and thereby to reduce wear on the screen, on one hand, and on the top plate of the suction-box, on the other hand.
  • a further object of the invention is to provide for a reduction of the power to be supplied for driving the wire in a paper-making machine having waterremoving suction-boxes across such boxes, and as a result thereof to reduce the risk of rupturing the wire.
  • Another object of the invention is to make the dehydration of the fibrous suspension on the wire of a paper-making machine more efficient.
  • Still another important object of the invention is to realize a more even distribution and improved felting of the fibres of stock fed to the wire of, for example, a paper-making machine, and thereby obtain increased strength of a paper or similar web produced from such stock.
  • each suction-box is mounted on resilient supports and coupled to vibrators in such a way that it has imparted to it a vibratory movement having a component in the longitudinal direction of the screen and a vertical component, said vibratory movement being adapted in respect of direction and amplitude such that the suction-box, at least in its highest position, contacts the screen with its perforated top plate and moves in the same direction as the screen.
  • FIG. 1 is a side view of part of a paper-making machine with two suction-boxes and vibratory equipment associated therewith;
  • FIG. 2 is a top plan view of the same part of the machine.
  • FIG. 3 is a vertical section through either of the suction-boxes along the line 3-3 in FIG. 2 on a larger scale.
  • FIGS. 1 and 2 there is diagrammatically shown part of a paper-making machine comprising a head box 1 followed by a wire section which comprises a breast roll 2 adjacent the said head box 1, a couch roll 3 at the other end of the wire section and an endless wire screen 4 passing around said rolls.
  • the screen may be made from a plastic or other suitable material.
  • the top run of the wire screen receiving wet stock from the head box 1 is supported in a horizontal plane by a series of idling rolls 5 and by two suction-boxes 6 and 7 placed closely in front of the breast roll 2 and just behind the couch roll 3, respectively. Where needed, additional suction-boxes may be disposed between said boxes 6 and 7.
  • the return run of the wire 4 is passed over carrying, stretch and guide rolls 8 in a well-known way.
  • the suction-boxes 6 and 7 are each provided with a perforated flat top plate 9, as is more clearly shown in FlG. 3, and are connected to vacuum lines (not shown) through which a vacuum is produced in the interior of the boxes.
  • This top plate 9 may preferable be made from steel, especially acid resistant stainless steel, or from a suitable plastic material or other low friction material.
  • the suction boxes 6 and 7 are each mounted on resilient cushions 10, for example of rubber, which are placed one at each of the four corners of the boxes on bases 11, so as to be capable of vibration.
  • the suction boxes At each side of the machine the suction boxes have extensions 12 beyond the lateral edges of the wire screen 4. Fixed on top of said extensions 12 are sloping brackets 13 to each of which is bolted a vibrator 14 of any well-known type capable of producing vibrations in vertical planes in the longitudinal direction of the paper-making machine, i.e. along the wire screen 4. As illustrated more particularly in FIG.
  • the brackets 13 are disposed with their top plane sloping downwards in the travelling direction of the top run of the wire screen 4, which results in the vibrations transmitted to the suction-boxes taking place in a direction as indicated by the double-pointed arrows 15, substantially at right angles to said sloping plane so that the vibratory movement of the boxes will have a horizontal component in the longitudinal direction of the wire screen and another vertical component.
  • the vibrators 14 are of the unbalanced rotary type the two vibrators of each suction-box are to have opposite directions of rotation so as to neutralize any transverse component of the vibration of the boxes.
  • the vibratory movement of the suction-boxes will be of such direction and amplitude that the perforated top plate 9 of the boxes, at least in the highest position of the latter, contacts and moves in the same direction as the wire 4, preferably also applying some force to the underside of the wire to assist in moving it forward.
  • the suction-boxes 6 and 7 are positioned such that the wire 4, when not moving, normally rests on the top plate 9 of the boxes but during operation, as a consequence of the vibratory movement of the boxes, is periodically slightly lifted and at the same time pushed forward by the boxes, while on the other hand the boxes during their return stroke momentarily give up their contact with the wire 4.
  • the frequency of vibration is not critical but may, for example, amount to 1000 to 4000 strokes per minute.
  • Apparatus for dehydrating wet fibrous materials carried on a travelling endless screen comprising a suction-box having a top plate, resilient means supporting the suction-box under the upper run of said screen with said top plate disposed adjacent the underside of said upper run, and means coupled to the suction-box for imparting vibratory movement thereto having components in the longitudinal direction of said screen and in the vertical direction and of such resultant direction and amplitude that the top plate of the suction-box at least in its highest position contacts the underside of, and moves in the same direction as, said upper run of the screen.
  • Apparatus for dehydrating wet fibrous materials carried on a travelling endless screen comprising a suction-box havinga top plate, resilient means supporting the suction-box under the upper run of said screen with said top plate disposed adjacent the underside of said upper run, and vibrator means disposed on and coupled to lateral extensions of the suction-box beyond each side of said screen for imparting vibratory movement thereto having components in the longitudinal direction of said screen and in the vertical direction and of such resultant direction and amplitude that the top plate of the suction-box at least in its highest position contacts the underside of, and moves in the same direction as, said upper run of the screen.
  • Apparatus for dehydrating wet fibrous materials carried on a travelling endless screen comprising a suetion-box having a top plate, resilient means supporting the suction-box under the upper run of said screen with said top plate disposed adjacent the underside of said upper run, bracket means fixed on lateral extensions of the suction-box beyond each side of said screen with top planes'sloping downwards in the travelling direction of the upper run of said screen, and vibrator means mounted on said sloping top planes for imparting vibratory movement thereto having components in the longitudinal direction of said screen and in the vertical direction and of such resultant direction and amplitude that the top plate of the suction-box at least in its highest position contacts the underside of, and moves in the same direction as, said upper run of the screen.

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US370621A 1972-07-17 1973-06-18 Papermaking Machine Suction Box with Vibratory Movement having both Longitudinal and Vertical Components Expired - Lifetime US3864207A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7209403A SE370738B (es) 1972-07-17 1972-07-17

Publications (1)

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US3864207A true US3864207A (en) 1975-02-04

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US370621A Expired - Lifetime US3864207A (en) 1972-07-17 1973-06-18 Papermaking Machine Suction Box with Vibratory Movement having both Longitudinal and Vertical Components

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US (1) US3864207A (es)
JP (1) JPS5138805B2 (es)
CA (1) CA971791A (es)
SE (1) SE370738B (es)
SU (1) SU562210A3 (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769111A (en) * 1986-07-02 1988-09-06 A. Ahlstrom Corporation Support apparatus for a dewatering unit in the web forming section of a paper machine
US20030024673A1 (en) * 2000-10-16 2003-02-06 Roy Van Essen Adjustable activity drainage box
US20040140077A1 (en) * 2001-12-21 2004-07-22 Bricco Michael J. Method and apparatus for forming a paper or tissue web
US20040149415A1 (en) * 2000-12-22 2004-08-05 Vibre-Tech Llc Method and apparatus for forming a paper or tissue web
EP1803848A1 (de) * 2005-12-30 2007-07-04 Voith Patent GmbH Blattbildungsvorrichtung zum Bilden einer Faserstoffbahn

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2683166B2 (ja) * 1991-04-26 1997-11-26 株式会社テック サーマルプリンタ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US789036A (en) * 1904-10-19 1905-05-02 Louis F Jurgenson Paper-making machine.
US1231717A (en) * 1916-06-26 1917-07-03 Albert John Davies Fourdrinier machine.
US1260878A (en) * 1917-03-08 1918-03-26 Albert John Davies Fourdrinier machine.
US3649449A (en) * 1970-01-27 1972-03-14 Tampella Oy Ab Papermaking machine suction box with yieldably biased cover

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US789036A (en) * 1904-10-19 1905-05-02 Louis F Jurgenson Paper-making machine.
US1231717A (en) * 1916-06-26 1917-07-03 Albert John Davies Fourdrinier machine.
US1260878A (en) * 1917-03-08 1918-03-26 Albert John Davies Fourdrinier machine.
US3649449A (en) * 1970-01-27 1972-03-14 Tampella Oy Ab Papermaking machine suction box with yieldably biased cover

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4769111A (en) * 1986-07-02 1988-09-06 A. Ahlstrom Corporation Support apparatus for a dewatering unit in the web forming section of a paper machine
US20030024673A1 (en) * 2000-10-16 2003-02-06 Roy Van Essen Adjustable activity drainage box
US6780286B2 (en) * 2000-10-16 2004-08-24 Astenjohnson, Inc. Adjustable activity drainage box
USRE43679E1 (en) * 2000-10-16 2012-09-25 Astenjohnson, Inc. Adjustable activity drainage box
US20040149415A1 (en) * 2000-12-22 2004-08-05 Vibre-Tech Llc Method and apparatus for forming a paper or tissue web
US7169262B2 (en) * 2000-12-22 2007-01-30 Vibre-Tech Llc Method and apparatus for forming a paper or tissue web
US20040140077A1 (en) * 2001-12-21 2004-07-22 Bricco Michael J. Method and apparatus for forming a paper or tissue web
US7101462B2 (en) * 2001-12-21 2006-09-05 Vibre-Tech, Llc Method and apparatus for forming a paper or tissue web
US20070068644A1 (en) * 2001-12-21 2007-03-29 Vibre-Tech, Llc. Method and apparatus for forming a paper or tissue web
EP1803848A1 (de) * 2005-12-30 2007-07-04 Voith Patent GmbH Blattbildungsvorrichtung zum Bilden einer Faserstoffbahn

Also Published As

Publication number Publication date
SE370738B (es) 1974-10-28
JPS4944366A (es) 1974-04-26
SU562210A3 (ru) 1977-06-15
CA971791A (en) 1975-07-29
JPS5138805B2 (es) 1976-10-23

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