EP0719361B1 - A press section apparatus - Google Patents

A press section apparatus Download PDF

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Publication number
EP0719361B1
EP0719361B1 EP94924136A EP94924136A EP0719361B1 EP 0719361 B1 EP0719361 B1 EP 0719361B1 EP 94924136 A EP94924136 A EP 94924136A EP 94924136 A EP94924136 A EP 94924136A EP 0719361 B1 EP0719361 B1 EP 0719361B1
Authority
EP
European Patent Office
Prior art keywords
press
extended nip
shoe
felt
web
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
EP94924136A
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German (de)
French (fr)
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EP0719361A1 (en
Inventor
Arnold Joseph Schmitt
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.)
Beloit Technologies Inc
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Beloit Technologies Inc
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 Beloit Technologies Inc filed Critical Beloit Technologies Inc
Publication of EP0719361A1 publication Critical patent/EP0719361A1/en
Application granted granted Critical
Publication of EP0719361B1 publication Critical patent/EP0719361B1/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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof

Definitions

  • the present invention relates to a press section apparatus for pressing water from a formed web. More specifically, the present invention relates to an extended nip press.
  • the web tends to be thrown off of the felt by centrifugal force as the web travels around the FLEX-O-NIP type roll upstream relative to the second extended nip press.
  • EP-A-0 289 477 describes a press apparatus including two extended nip presses downstream of successive nips formed by press roll couples in the first pressing stage.
  • GB-A-2 127 449 discloses a press section apparatus which includes first extended nip press for pressing a first portion of water from the web.
  • a press pick-up felt loop extends through the first extended nip press and a suction turning roll is disposed downstream relative to the first extended nip press and within the pick-up felt loop for guiding the press felt and for urging the web towards and around the turning roll.
  • a second extended nip press is disposed downstream relative to the turning roll.
  • the pick-up felt extends through the second extended nip press.
  • the second press includes a backing roll disposed on one side of the web having a smooth circumferential surface such that the web follows the surface when the web emerges from the second extended nip press.
  • a transfer means transfers the web away from the smooth surface.
  • the press apparatus of the invention is characterized by the features claimed in the characterizing portion of claim 1.
  • the first extended nip press includes a first extended nip press shoe disposed within the loop of a second press felt which is disposed between the first extended nip press shoe and the web.
  • a first vented controlled deflection roll cooperates with the first shoe.
  • the first roll is disposed within the loop defined by the pick-up felt.
  • the arrangement is such that the web is disposed between the press felt and the second press felt. During movement of the press felt, the web and the second press felt are disposed between the first vented deflection roll and the first extended nip press shoe.
  • the first extended nip press further includes a vented extended nip press blanket which is disposed between the first extended nip press shoe and the second press felt.
  • a further press felt is disposed downstream relative to the smooth surface.
  • the arrangement is such that the transfer means transfers the web from the smooth surface onto the further press felt.
  • a third extended nip press is disposed downstream relative to the transfer means.
  • the third extended nip press includes a further backing roll disposed on the opposite side of the web, thereby controlling two-sidedness of the resultant web.
  • the web is fully supported between the first and second extended nip presses by the pick-up felt and two-sided ness of the resultant web is controlled by the third extended nip press.
  • the first extended nip press shoe is a hydrodynamic shoe, and in another embodiment cf the present invention, the first press shoe is a hydrostatic shoe.
  • the suction turning roll is connected to a source of partial vacuum such that the web is urged towards the press felt when the press felt and the second press felt diverge relative to each other.
  • the second extended nip press includes a second extended nip press shoe which is disposed within a loop defined by the press felt.
  • the press section apparatus also includes a second vented blanket which is disposed between the second extended nip press shoe and the press felt.
  • the second extended nip press shoe is a hydrodynamic shoe, and in another embodiment of the present invention, is a hydrostatic shoe.
  • the second extended nip press includes a second controlled deflection backing roll which cooperates with the second extended nip press shoe for removing a second portion of water from the web.
  • the transfer means includes a lead-in roll which is disposed in close proximity to the smooth surface and downstream relative to the second press shoe for leading the pressed web from the smooth surface towards the further press felt.
  • the transfer means includes a suction transfer roll which is disposed within a further loop defined by the further press felt such that the web supported by the further press felt is guided from the lead-in roll towards the third extended nip press.
  • the third extended nip press includes a third extended nip press shoe which is disposed within the further loop.
  • the third extended nip press includes a third vented blanket which is disposed between the third press shoe and the further press felt.
  • the third press shoe is a hydrodynamic shoe, and in another embodiment of the present invention, the third press shoe is a hydrostatic shoe.
  • the third extended nip press also includes a third controlled deflection controlled backing roll which cooperates with the third extended nip press shoe for pressing the web and for controlling two-sidedness of the resultant web.
  • Figure 1 is a side-elevational view of a press section apparatus, generally designated 10 according to the present invention, for pressing water from a formed web W.
  • the apparatus 10 includes a first extended nip press N1 for pressing a first portion of water from the web W .
  • a press felt 12 extends through the first extended nip press N1, and a suction turning roll 14 is disposed downstream relative to the first extended nip press N1 for guiding the press felt 12 and for urging the web W towards and around the turning roll 14.
  • a second extended nip press N2 is disposed downstream relative to the turning roll 14.
  • the second extended nip press N2 includes a backing roll 16 having a smooth circumferential surface 18 such that the web W follows the surface 18 when the web W emerges from the second extended nip press N2.
  • Transfer means transfer the web W away from the smooth surface 18 to a further press felt 22 which is disposed downstream relative to the smooth surface 18 .
  • the arrangement is such that the transfer means 20 transfers the web W from the smooth surface 18 onto the further press felt 22 .
  • a third extended nip press N3 is disposed downstream relative to the transfer means 20 for controlling two-sidedness of the resultant web W .
  • the first extended nip press N1 includes a first extended nip press shoe 24.
  • the press N1 also includes a second press felt 26 which is disposed between the first extended nip press shoe 24 and the web W .
  • a first vented controlled deflection roll 28 cooperates with the first shoe 24 , the arrangement being such that the web W is disposed between the press felt 12 and the second press felt 26 during movement of the press felt 12 , the web W and the second press felt 26 between the first vented deflection roll 28 and the first extended nip press shoe 24 .
  • the first extended nip press N1 also includes a vented extended nip press blanket 30 which is disposed between the first extended nip press shoe 24 and the second press felt 26 .
  • the first extended nip press shoe 24 is a hydrodynamic shoe.
  • the first extended nip press shoe 24A is a hydrostatic shoe.
  • the suction turning roll 14 is connected to a source of partial vacuum 32 such that the web W is urged towards the press felt 12 when the press felt 12 and the second press felt 26 diverge relative to each other.
  • the second extended nip press N2 includes a second extended nip press shoe 34 which is disposed within a loop defined by the press felt 12.
  • the press section apparatus 10 also includes a second vented blanket 36 which is disposed between the second extended nip press shoe 34 and the press felt 12.
  • the second extended nip press shoe is a hydrodynamic shoe, as indicated in Figure 1, and in a second embodiment of the present invention as shown in Figure 2, the second extended nip press shoe 34A is a hydrostatic shoe.
  • the second extended nip press N2 includes the backing roll 16 which is a second controlled deflection backing roll.
  • the backing roll 16 cooperates with the second extended nip press shoe 34 for removing a second portion of water from the web W .
  • the transfer means 20 includes a lead-in roll 38 which is disposed in close proximity to the smooth surface 18 and downstream relative to the second press shoe 34 for leading the pressed web W from the smooth surface 18 towards the further press felt 22 .
  • the transfer means 20 also includes a suction transfer roll 40 which is disposed within a further loop defined by the further press felt 22.
  • the arrangement is such that the web W supported by the further press felt 22 is guided from the lead-in roll 38 towards the third extended nip press N3.
  • the third extended nip press N3 includes a third extended nip press shoe 42 disposed within the further loop.
  • the third extended nip press shoe 42 cooperates with a third vented blanket 44 which is disposed between the third press shoe 42 and the further press felt 22.
  • the third press shoe 42 is a hydrodynamic shoe, whereas in Figure 2, the third press shoe 42A is a hydrostatic shoe.
  • the third extended nip press N3 also includes a third controlled deflection controlled backing roll 46 which cooperates with the third extended nip press shoe 42 for pressing the web W and for controlling two-sidedness of the resultant web.
  • FIG 2 shows an alternative embodiment of the present invention in which each of the press shoes 24A,34A and 42A is a hydrostatic shoe, rather than a hydrodynamic shoe.
  • the arrangement shown in Figure 2 is identical to that shown in Figure 1, and similar reference characters are used to identify similar parts, such numerals having the suffix "A" added thereto.
  • the web is fully supported through the first extended nip press N1A between cooperating felts 12A and 26A. Subsequently, the suction turning roll 14 guides the web supported by the felt 12 so that the web W is guided through the second nip N2.
  • the arrangement particularly enables stabilization of the relatively wet web from the first extended nip press N1 to the second extended nip press N2 .
  • the web adheres to the smooth surface 18 of the backing roll 16 and is doctored therefrom so that a tail can be threaded under the lead roll 38 and drawn onto the further felt 22 for guidance through the third nip press N3.
  • the present invention provides a significant improvement over the prior art presses and avoids the problem of blowing the unstable pressed web away from a supporting press felt when such web emerges from a first extended nip press.

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  • Paper (AREA)

Description

The present invention relates to a press section apparatus for pressing water from a formed web. More specifically, the present invention relates to an extended nip press.
Information Disclosure Statement
US-A-4,257,844 to Schmitt et al teaches a double felted vented nip press followed by a suction turning roll with a vented roll couple press disposed immediately downstream relative to the turning roll.
Furthermore, US-A-4,988,410 to Albrecht teaches an ENP, the bearing blanket and felt of which transport the pressed web past a further extended nip press shoe for removing further water from the web.
However, in the arrangement taught by the US-A-4 988 410 patent, the web is unstable after the first extended nip at the point of separation of the respective press felts. Accordingly, there is a tendency for high pressure air or steam within the first ENP to blow the web away from the press felt 11.
Additionally, with the US-A-4 988 410 arrangement, the web tends to be thrown off of the felt by centrifugal force as the web travels around the FLEX-O-NIP type roll upstream relative to the second extended nip press.
EP-A-0 289 477 describes a press apparatus including two extended nip presses downstream of successive nips formed by press roll couples in the first pressing stage.
In GB-A-2 127 449 there is described a press apparatus according to the preamble of claim 1. More specifically, GB-A-2 127 449 discloses a press section apparatus which includes first extended nip press for pressing a first portion of water from the web. A press pick-up felt loop extends through the first extended nip press and a suction turning roll is disposed downstream relative to the first extended nip press and within the pick-up felt loop for guiding the press felt and for urging the web towards and around the turning roll. A second extended nip press is disposed downstream relative to the turning roll. The pick-up felt extends through the second extended nip press. The second press includes a backing roll disposed on one side of the web having a smooth circumferential surface such that the web follows the surface when the web emerges from the second extended nip press. A transfer means transfers the web away from the smooth surface.
It is a primary objective of the present invention to overcome the aforementioned disadvantages of the prior art arrangements and to provide a press section apparatus which enables stabilization of the relatively wet web from the first extended nip press to the second extended nip press and which controls two-sidedness of the resultant web.
To achieve this, the press apparatus of the invention is characterized by the features claimed in the characterizing portion of claim 1.
Basically, in the press section apparatus according to the invention, the first extended nip press includes a first extended nip press shoe disposed within the loop of a second press felt which is disposed between the first extended nip press shoe and the web.
A first vented controlled deflection roll cooperates with the first shoe. The first roll is disposed within the loop defined by the pick-up felt. The arrangement is such that the web is disposed between the press felt and the second press felt. During movement of the press felt, the web and the second press felt are disposed between the first vented deflection roll and the first extended nip press shoe.
The first extended nip press further includes a vented extended nip press blanket which is disposed between the first extended nip press shoe and the second press felt.
A further press felt is disposed downstream relative to the smooth surface. The arrangement is such that the transfer means transfers the web from the smooth surface onto the further press felt.
Also, a third extended nip press is disposed downstream relative to the transfer means. The third extended nip press includes a further backing roll disposed on the opposite side of the web, thereby controlling two-sidedness of the resultant web.
According to the press section apparatus of the present invention, the web is fully supported between the first and second extended nip presses by the pick-up felt and two-sided ness of the resultant web is controlled by the third extended nip press.
In one embodiment of the present invention, the first extended nip press shoe is a hydrodynamic shoe, and in another embodiment cf the present invention, the first press shoe is a hydrostatic shoe.
The suction turning roll is connected to a source of partial vacuum such that the web is urged towards the press felt when the press felt and the second press felt diverge relative to each other.
The second extended nip press includes a second extended nip press shoe which is disposed within a loop defined by the press felt.
The press section apparatus also includes a second vented blanket which is disposed between the second extended nip press shoe and the press felt.
The second extended nip press shoe, according to one embodiment of the present invention, is a hydrodynamic shoe, and in another embodiment of the present invention, is a hydrostatic shoe.
The second extended nip press includes a second controlled deflection backing roll which cooperates with the second extended nip press shoe for removing a second portion of water from the web.
The transfer means includes a lead-in roll which is disposed in close proximity to the smooth surface and downstream relative to the second press shoe for leading the pressed web from the smooth surface towards the further press felt.
Additionally, the transfer means includes a suction transfer roll which is disposed within a further loop defined by the further press felt such that the web supported by the further press felt is guided from the lead-in roll towards the third extended nip press.
The third extended nip press includes a third extended nip press shoe which is disposed within the further loop.
Additionally, the third extended nip press includes a third vented blanket which is disposed between the third press shoe and the further press felt.
In one embodiment of the present invention, the third press shoe is a hydrodynamic shoe, and in another embodiment of the present invention, the third press shoe is a hydrostatic shoe.
The third extended nip press also includes a third controlled deflection controlled backing roll which cooperates with the third extended nip press shoe for pressing the web and for controlling two-sidedness of the resultant web.
Brief Description Of The Drawings
  • Figure 1 is a side-elevational view of the press section apparatus according to the present invention; and
  • Figure 2 is a similar view to that shown in Figure 1, but shows the respective extended nip presses having hydrostatic rather than hydrodynamic shoes.
  • Similar reference characters refer to similar parts throughout the various views of the drawings.
    • Detailed Description Of The Drawings
    Figure 1 is a side-elevational view of a press section apparatus, generally designated 10 according to the present invention, for pressing water from a formed web W. The apparatus 10 includes a first extended nip press N1 for pressing a first portion of water from the web W.
    A press felt 12 extends through the first extended nip press N1, and a suction turning roll 14 is disposed downstream relative to the first extended nip press N1 for guiding the press felt 12 and for urging the web W towards and around the turning roll 14.
    A second extended nip press N2 is disposed downstream relative to the turning roll 14.
    The second extended nip press N2 includes a backing roll 16 having a smooth circumferential surface 18 such that the web W follows the surface 18 when the web W emerges from the second extended nip press N2.
    Transfer means, generally designated 20, transfer the web W away from the smooth surface 18 to a further press felt 22 which is disposed downstream relative to the smooth surface 18. The arrangement is such that the transfer means 20 transfers the web W from the smooth surface 18 onto the further press felt 22.
    A third extended nip press N3 is disposed downstream relative to the transfer means 20 for controlling two-sidedness of the resultant web W.
    The first extended nip press N1 includes a first extended nip press shoe 24. The press N1 also includes a second press felt 26 which is disposed between the first extended nip press shoe 24 and the web W.
    A first vented controlled deflection roll 28 cooperates with the first shoe 24, the arrangement being such that the web W is disposed between the press felt 12 and the second press felt 26 during movement of the press felt 12, the web W and the second press felt 26 between the first vented deflection roll 28 and the first extended nip press shoe 24.
    The first extended nip press N1 also includes a vented extended nip press blanket 30 which is disposed between the first extended nip press shoe 24 and the second press felt 26.
    As shown in Figure 1, the first extended nip press shoe 24 is a hydrodynamic shoe.
    However, in an alternative embodiment of the present invention as shown in Figure 2, the first extended nip press shoe 24A is a hydrostatic shoe.
    The suction turning roll 14 is connected to a source of partial vacuum 32 such that the web W is urged towards the press felt 12 when the press felt 12 and the second press felt 26 diverge relative to each other.
    The second extended nip press N2 includes a second extended nip press shoe 34 which is disposed within a loop defined by the press felt 12.
    The press section apparatus 10 also includes a second vented blanket 36 which is disposed between the second extended nip press shoe 34 and the press felt 12.
    In one embodiment of the present invention, the second extended nip press shoe is a hydrodynamic shoe, as indicated in Figure 1, and in a second embodiment of the present invention as shown in Figure 2, the second extended nip press shoe 34A is a hydrostatic shoe.
    The second extended nip press N2 includes the backing roll 16 which is a second controlled deflection backing roll. The backing roll 16 cooperates with the second extended nip press shoe 34 for removing a second portion of water from the web W.
    The transfer means 20 includes a lead-in roll 38 which is disposed in close proximity to the smooth surface 18 and downstream relative to the second press shoe 34 for leading the pressed web W from the smooth surface 18 towards the further press felt 22.
    The transfer means 20 also includes a suction transfer roll 40 which is disposed within a further loop defined by the further press felt 22. The arrangement is such that the web W supported by the further press felt 22 is guided from the lead-in roll 38 towards the third extended nip press N3.
    The third extended nip press N3 includes a third extended nip press shoe 42 disposed within the further loop.
    The third extended nip press shoe 42 cooperates with a third vented blanket 44 which is disposed between the third press shoe 42 and the further press felt 22.
    In the embodiment shown in Figure 1, the third press shoe 42 is a hydrodynamic shoe, whereas in Figure 2, the third press shoe 42A is a hydrostatic shoe.
    The third extended nip press N3 also includes a third controlled deflection controlled backing roll 46 which cooperates with the third extended nip press shoe 42 for pressing the web W and for controlling two-sidedness of the resultant web.
    Figure 2 shows an alternative embodiment of the present invention in which each of the press shoes 24A,34A and 42A is a hydrostatic shoe, rather than a hydrodynamic shoe. In other respects, the arrangement shown in Figure 2 is identical to that shown in Figure 1, and similar reference characters are used to identify similar parts, such numerals having the suffix "A" added thereto.
    In operation of the press section apparatus according to the present invention, the web is fully supported through the first extended nip press N1A between cooperating felts 12A and 26A. Subsequently, the suction turning roll 14 guides the web supported by the felt 12 so that the web W is guided through the second nip N2. The arrangement particularly enables stabilization of the relatively wet web from the first extended nip press N1 to the second extended nip press N2.
    The web adheres to the smooth surface 18 of the backing roll 16 and is doctored therefrom so that a tail can be threaded under the lead roll 38 and drawn onto the further felt 22 for guidance through the third nip press N3.
    The present invention provides a significant improvement over the prior art presses and avoids the problem of blowing the unstable pressed web away from a supporting press felt when such web emerges from a first extended nip press.

    Claims (15)

    1. a press section apparatus (10) for pressing water form a formed web (W), said apparatus comprising:
      a first extended nip press (N1) for pressing a first portion of water from the web (W), said first extended nip press (N1) including a first extended nip press shoe (24), a first vented roll (28) cooperating with said first shoe (24) and an extended nip press blanket (30) disposed between said first shoe (24) and the web (W);
      a press pick-up felt (12) loop and a second press felt (26) loop extending through said first extended nip press (N1), the arrangement being such that the web (W) is disposed between said press pick-up felt (12) and said second press felt (26) during movement of said press pick-up felt (12), the web (W) and said second press felt (26) between said first vented roll (28) and said first extended nip press shoe (24);
      a suction turning roll (14) disposed downstream relative to said first extended nip press (N1) and within said press pick-up felt (12) loop for guiding said pick-up press felt (12) and for urging the web (W) towards and around said turning roll (14);
      a second extended nip press (N2) disposed downstream relative to said turning roll (14);
      said press pick-up felt (12)extending through said second extended nip press (N2);
         said second extended nip press (N2) including:
      a backing roll (16) disposed on one side of the web (W), said backing roll (16) having a smooth circumferential surface (18) structured and arranged so that the web (W) follows said surface (18) when the web (W) emerges from said second extended nip press (N2) ; and
      transfer means (20) for transferring the web (W) away from said smooth surface (18),
         characterized in that
      said first extended nip press shoe (24) is disposed within the loop defined by said second press felt (26),
      said second press felt (26) being disposed between said first extended nip press shoe (24) and the web (W),
      that said first vented roll (28) is a vented controlled deflection roll, said first vented controlled deflection roll (28) being disposed within the loop defined by said press pick-up felt (12), and
      that said extended nip press blanket (30) is a vented extended nip press blanket which is disposed between said first extended nip press shoe (24) and said second press felt (26), said apparatus further comprising
      a further press felt (22) disposed downstream relative to said smooth surface (18), the arrangement being such that said transfer means (20) transfers the web (W) from said smooth surface (18) onto said further press felt (22); and
      a third extended nip press (N3) disposed downstream relative to said transfer means (20), said third extended nip press (N3) including a further backing roll (46) which is disposed on the opposite side of the web (W), thereby controlling two-sidedness of the resultant web (W).
    2. A press section apparatus as set forth in claim 1, characterized in that said first extended nip press shoe (24) is a hydrodynamic shoe.
    3. A press section apparatus as set forth in claim 1, characterized in that said first extended nip press shoe (24A) is a hydrostatic shoe.
    4. A press section apparatus as set forth in claim 1, characterized in that said suction turning roll (14) is connected in a source of partial vacuum (32) such that the web (W) is urged towards said press pick-up felt (12) when said press pick-up felt (12) and said second press felt (26) diverge relative to each other.
    5. A press section apparatus as set forth in claim 1, characterized in that said second extended nip press (N2) includes :
      a second extended nip press shoe (34) disposed within said loop defined by said press pick-up felt (12).
    6. A press section apparatus as set forth in claim 5, characterized in further including a vented blanket (36) disposed between said second extended nip press shoe (34) and said press pick-up felt (12).
    7. A press section apparatus as set forth in claim 5, characterized in that said second extended nip press shoe (34) is a hydrodynamic shoe.
    8. A press section apparatus as set forth in claim 5, characterized in that said second extended nip press shoe (34A) is a hydrostatic shoe.
    9. A press section apparatus as set forth in claim 5, characterized in that said backing roll (16) in said second extended nip press (N2) is a second controlled deflection backing roll (16) which cooperates with said second extended nip press shoe (34) for removing a second portion of water from the web (W).
    10. A press section apparatus as set forth in claim 1, characterized in that said transfer means (20) includes:
      a lead-in roll (38) disposed in close proximity to said smooth surface (18) and downstream relative to said press shoe (34) for leading the pressed web (W) from said smooth surface (18) towards said further press felt (22),
      a suction transfer roll (40) disposed within a further loop defined by said further press felt (22) such that the web (W) supported by said further press felt (22) is guided from said lead-in roll (38) towards said third extended nip press (N3).
    11. A press section apparatus as set forth in claim 10, characterized in that said third extended nip press (N3) includes:
      an extended nip press shoe (42) disposed within said further loop.
    12. A press section apparatus as set forth in claim 11, characterized in that said third extended nip press (N3) includes:
      a vented blanket (44) disposed between said press shoe (42) disposed within said further loop and said further press felt (22).
    13. A press section apparatus as set forth in claim 11, characterized in that said press shoe (42) disposed within said further loop is a hydrodynamic shoe.
    14. A press section apparatus as set forth in claim 11, characterized in that said press shoe (42A) disposed within said further loop is a hydrostatic shoe.
    15. A press section apparatus as set forth in claim 11, characterized in that said further backing roll (46) in said third extended nip press (N3) is a controlled deflection backing roll (46) which cooperates with said extended nip press shoe (42) disposed within said further loop for pressing the web (W) and for controlling two-sidedness of the resultant web.
    EP94924136A 1993-09-16 1994-08-08 A press section apparatus Expired - Lifetime EP0719361B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    US12302293A 1993-09-16 1993-09-16
    PCT/US1994/008873 WO1995008025A1 (en) 1993-09-16 1994-08-08 A press section apparatus
    US123022 2002-04-15

    Publications (2)

    Publication Number Publication Date
    EP0719361A1 EP0719361A1 (en) 1996-07-03
    EP0719361B1 true EP0719361B1 (en) 1998-12-02

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    Application Number Title Priority Date Filing Date
    EP94924136A Expired - Lifetime EP0719361B1 (en) 1993-09-16 1994-08-08 A press section apparatus

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    EP (1) EP0719361B1 (en)
    JP (1) JP2720113B2 (en)
    KR (1) KR960704114A (en)
    BR (1) BR9407490A (en)
    CA (1) CA2171952A1 (en)
    DE (1) DE69415031T2 (en)
    FI (1) FI116148B (en)
    WO (1) WO1995008025A1 (en)

    Families Citing this family (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FI953245A (en) * 1995-06-30 1996-12-31 Valmet Corp Press section of a paper machine
    DE19802853A1 (en) * 1998-01-26 1999-07-29 Voith Sulzer Papiertech Patent Press section for water extraction from wet web in paper making machine

    Family Cites Families (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JPS57209685A (en) * 1981-06-19 1982-12-23 Kotobuki Kogyo Kk Detection of exchange period for water-softening material in hard water softener
    CA1225266A (en) * 1982-09-29 1987-08-11 Jan I. Bergstrom Press arrangement
    JPS60150840A (en) * 1984-01-19 1985-08-08 Miura Co Ltd Abnormality detecting device for automatically regenerable hard water softening apparatus
    EP0289477A3 (en) * 1987-04-28 1989-03-08 Valmet Paper Machinery Inc. Method for hot-pressing of a paper web and a drying device for the implementation of the method
    DE9206340U1 (en) * 1991-08-10 1992-08-13 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Press section of a paper machine
    DE4321403A1 (en) * 1993-06-26 1994-01-20 Voith Gmbh J M Paper making machine press section - has a fixed shoe or heater with a smooth surface at the paper side

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    FI961228A0 (en) 1996-03-15
    BR9407490A (en) 1996-06-25
    WO1995008025A1 (en) 1995-03-23
    DE69415031T2 (en) 1999-07-01
    DE69415031D1 (en) 1999-01-14
    EP0719361A1 (en) 1996-07-03
    CA2171952A1 (en) 1995-03-23
    FI116148B (en) 2005-09-30
    FI961228A (en) 1996-03-15
    KR960704114A (en) 1996-08-31
    JPH08509036A (en) 1996-09-24
    JP2720113B2 (en) 1998-02-25

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