WO2009129842A1 - Press section of a web forming machine - Google Patents

Press section of a web forming machine Download PDF

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Publication number
WO2009129842A1
WO2009129842A1 PCT/EP2008/054821 EP2008054821W WO2009129842A1 WO 2009129842 A1 WO2009129842 A1 WO 2009129842A1 EP 2008054821 W EP2008054821 W EP 2008054821W WO 2009129842 A1 WO2009129842 A1 WO 2009129842A1
Authority
WO
WIPO (PCT)
Prior art keywords
web
roll
nip
metal belt
press section
Prior art date
Application number
PCT/EP2008/054821
Other languages
French (fr)
Inventor
Riku Pihko
Original Assignee
Metso Paper, 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 Metso Paper, Inc. filed Critical Metso Paper, Inc.
Priority to PCT/EP2008/054821 priority Critical patent/WO2009129842A1/en
Publication of WO2009129842A1 publication Critical patent/WO2009129842A1/en

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00Press section of machines for making continuous webs of paper
    • D21F3/02Wet presses
    • D21F3/04Arrangements thereof
    • D21F3/045Arrangements thereof including at least one extended press nip
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00Dryer section of machines for making continuous webs of paper
    • D21F5/18Drying webs by hot air

Abstract

The invention relates to a press section of a web forming machine comprising a pressing nip (1) formed by a first roll (3) and a second roll (5), an endless heat-conductive metal belt (9) and an endless first fluid-permeable fabric (11), both arranged to pass through the pressing nip (1), the metal belt (9) and the first fluid-permeable fabric (11) being adapted to sandwich a web (13) in the pressing nip (1), a metal belt heating means (15) adapted to heat the metal belt (9), and a dewatering nip (17) formed by the first roll (3) and a third roll (7) upstream of the pressing nip (1).

Description

Description

Press section of a web forming machine

The invention relates to a press section of a web forming machine, in particular a paper or board machine, and to a method for pressing a web.

Document US 5 256 257 A is related to a press section of a paper machine, in which a paper web is passed on a first felt to a first pressing nip, the web being pressed between the first felt and a press belt made from a castable, hardened plastic. The first pressing nip is formed by a center roll and a first press roll. Downstream of the first pressing nip, the web is passed to a second pressing nip formed by the center roll and a second roll. The web is pressed between a second felt and the press belt. Then, the web supported on the press belt is passed to a dryer comprised of heat radiators and/or hot air nozzles for pre- drying the web.

In view of the above, it is the object of the invention to provide a press section of a web forming machine capable of decreasing the moisture content and increasing the paper quality of a web at a short distance, and a method for pressing a web, respectively.

This object is achieved by a press section of a web forming machine comprising the features of claim 1 of the invention as well as by a method for pressing a web comprising the features of claim 19.

Further developments are defined in the dependent claims. According to the invention, a press section of a web forming machine comprises a pressing nip formed by a first roll and a second roll, an endless heat-conductive metal belt and an endless first fluid-permeable fabric, both arranged to pass through the pressing nip. The metal belt and the first fluid-permeable fabric are adapted to sandwich a web in the pressing nip. Further, a metal belt heating means is adapted and arranged to heat the metal belt. Moreover, a dewatering nip is formed by the first roll and a third roll upstream of the pressing nip.

Due to the arrangement of a third roll for forming a dewatering nip with the first roll upstream of the pressing nip, the structure of the press section is compact and can be realized at a short distance in the web forming machine direction, since no further roll for forming the dewatering nip is necessary. Accordingly, the press section can be used in case of restricted space, in particular if existing web forming machines are modified.

The dewatering nip is effective in significantly reducing the moisture content of the web significantly in order to facilitate an attachment of the web to the metal belt and further moisture reduction in the pressing nip, to improve the result of the pressing nip, and to increase the efficiency of the pressing nip.

Heating the metal belt further enhances the attachment and adherence of the web to the metal belt. Furthermore, the use of a heat-conductive metal belt improves the heat transfer from the heating means to the metal belt as well as from the metal belt to the web. Accordingly, heat transfer from the hot metal belt to the web in the pressing nip is increased and, therefore, a high moisture reduction rate by evaporation within the pressing nip is obtained. Further, the pressing nip in which the web is sandwiched between the metal belt and the first fluid-permeable fabric is effective in mechanically removing water or moisture from the web. Thus, the moisture content of the web is effectively reduced. Further, since the pressing nip provides for a good contact between the web and the metal belt, good smoothness of the surface of the web is ensured. Attaching and adhering the web to the metal belt is effective in increasing the heat transfer to the web as well as in reducing the draw of the web. Further, the pressing nip is effective in removing the web from the fabric without there being the risk of the web adhering to the fabric (fabric picking) , even if a very smooth, excellent web- smoothness producing fabric is used.

Accordingly, the present invention provides a very compact press section for a web forming machine capable of increasing the quality of the web, in particular the smoothness of the web, and decreasing the moisture content at a short distance before transferring the web to a drying section .

Further, enhancing the web quality of the web, in particular the smoothness of the web, in the press section results in less cost-intensive subsequently arranged equipment like calendering equipment, i.e. a pre-calender can be omitted and/or fewer calendering nips can be provided.

Thus, considerable investment costs of the whole web forming machine can be saved.

According to a further aspect of the present invention, the metal belt is impervious to fluids. In this way, the attachment and the adherence of the web to the metal belt is even more improved and the heat capacity of the metal belt as well as the heat transfer through the metal belt, i.e. the heat transfer efficiency, is increased. A metal belt impervious to fluids comprises a more even and plainer surface resulting in a better smoothness of the web and a further reduced draw of the web. In particular, the surface of the web attached to the metal belt becomes smoother.

Alternatively, the metal belt may be formed by a woven metal belt or a perforated metal belt which is pervious to water/moisture. In this case, removal of moisture from the web through the metal belt while the web is attached to the metal belt is possible, thereby increasing the efficiency in the removal of moisture from the web.

According to another aspect of the present invention, the pressing nip is an extended nip.

Due to the extended nip, the contact and attachment of the web to the metal belt is further enhanced. On the other hand, lower linearly distributed loads may be provided so that the bulk of the web is maintained and steam formation within the pressing nip is prevented. The extended nip is further effective with respect to a better moisture reduction within the nip, since the press contact of the web is extended over a considerable distance in the machine direction .

According to a further aspect of the present invention, the first roll is a grooved roll.

Thus, removal of moisture from the web within the dewatering nip and the pressing nip is facilitated towards the first roll side of the web. On the other hand, a grooved roll enables high nip loads resulting in a good web quality as well as a good efficiency with respect to moisture removal.

According to a further aspect of the present invention, the second roll and the third roll are arranged on opposite sides of the first roll.

Thus, the load of the second roll and the load of the third roll acting in the direction of the first roll may be fully or at least partially compensated for. This reduces the load acting on the bearing parts of the first roll and a web forming machine frame supporting the first roll. Thus, lifetime of the first roll and maintenance costs are reduced.

Advantageously, the second roll is a shoe roll forming an extended nip in the dewatering nip.

According to a further aspect of the present invention, the third roll is a shoe roll forming an extended nip with the first roll. The shoe roll may preferably include a plastic belt with void volume, e.g. grooves, so that the dewatering efficiency in the dewatering nip is improved. Alternatively, the third roll can be a grooved roll, since the investment costs and maintenance costs of a grooved roll are low.

According to another aspect of the present invention, the metal belt is arranged to pass the pressing nip on the side of the second roll. According to a further aspect of the present invention, the first fluid-permeable fabric is arranged to pass through the dewatering nip.

Accordingly, the web is supported on the first fluid- permeable fabric on the way from the dewatering nip to the pressing nip due to which compactness of the press section is further increased, since only one endless fabric is necessary for passing the web through two nips.

According to a further aspect of the present invention, a reversing suction roll is adapted to reverse the first fluid-permeable fabric with the web thereon to guide the web into the pressing nip, and is arranged between the dewatering nip and the pressing nip.

Accordingly, by using a suction roll, further dewatering capacity is achieved between the dewatering nip and the pressing nip.

According to a further aspect of the present invention, a web pre-heating means is arranged opposite to the web supported on the first fluid-permeable fabric.

Accordingly, the web is further heated, whereby moisture reduction and adherence of the web to the metal belt is facilitated.

According to a further aspect of the present invention, the web pre-heating means is arranged opposite to the reversing suction roll.

Advantageously, the web pre-heating means is a steam box. According to a further aspect of the present invention, an endless second fluid-permeable fabric is arranged to pass the dewatering nip, the first and second fluid-permeable fabrics being adapted to sandwich the web in the dewatering nip .

By sandwiching the web between two fluid-permeable fabrics capable of receiving moisture, a high dewatering efficiency towards both sides of the web is provided in the dewatering nip. According to this aspect, the dewatering nip represents a double sided dewatering nip.

Advantageously, the first fluid-permeable fabric can be smoother, less compressible and/or less permeable than the second fluid-permeable fabric.

Thus, the first fluid-permeable fabric provides a better surface quality, i.e. a better smoothness of the web surface opposite to the web surface attached to the metal belt in the pressing nip, whereas the second fluid- permeable fabric provides a higher dewatering efficiency in the dewatering nip.

Fabric cleaning and heating means may be arranged and adapted to clean and heat the second fluid-permeable fabric and/or the first fluid-permeable fabric.

Thus, a cleaned second fluid-permeable fabric is provided which is effective with respect to the surface quality of the web as well as with respect to the dewatering efficiency.

According to another aspect of the present invention, the metal belt is arranged to pass the dewatering nip, wherein the metal belt and the first fluid-permeable fabric are adapted to sandwich the web in the dewatering nip.

Accordingly, the web is attached to the metal belt in the dewatering nip by which the draw of the web is further reduced. The metal belt can form a wrap around the first roll from the dewatering nip to the pressing nip. This helps pressing and smoothing the web as well as dewatering the web on the way from the dewatering nip to the pressing nip. According to this aspect, the dewatering nip represents a single sided dewatering nip and the pressing nip represents a pressing transfer nip.

According to still another aspect of the invention, a web heating means is arranged opposite to the web and opposite to the metal belt downstream of the pressing nip.

Thus, the web is heated for increasing the drying efficiency of a subsequently arranged drying section.

Further, a smoothing nip formed by two rolls sandwiching the metal belt and the web is arranged downstream of the pressing nip for smoothing the web attached to the metal belt.

This enhances the web surface quality and reduces the need for calendering after the press section and a subsequently arranged drying section.

The press section according to the present invention may be installed, for example, immediately downstream of a wire section of the web forming machine. Alternatively, one or more nips may be provided between the wire section and the press section according to the invention. The press section according to the present invention can be arranged immediately upstream of a drying section, like a cylinder dryer section, of the web forming machine.

The web forming machine can be a paper machine or a board machine machine.

The term fabric includes a felt and any kind of material in a band-like or belt-like shape, the basic structure of which is a fabric.

Fig. 1 shows a first embodiment of a press section according to the present invention.

Fig. 2 shows a second embodiment of a press section according to the present invention.

Fig. 3 shows a third embodiment of a press section according to the present invention.

According to a first embodiment of the present invention, as shown in Fig. 1, the press section is installed in a web forming machine and includes a pressing nip 1 formed by a grooved roll 3 (or alternatively a suction roll) as a center roll constituting a first roll and a shoe roll 5 constituting a second roll as a dewatering nip roll.

An endless heat conductive metal belt 9 and an endless first felt 11 forming a first fluid-permeable fabric pass through the pressing nip 1. A web 13 supported on the first felt 11 is passed towards the pressing nip 1 in such a manner that the web 13 is sandwiched between the first felt 11 and the metal belt 9. The metal belt 9 is heated directly before the pressing nip 1 by means of a metal belt heating means 15. Further, a dewatering nip 17 is formed by the center roll 3 and a grooved roll 7. The web 13 attached to the first felt 11 is passed towards the dewatering nip 17 and is sandwiched in the dewatering nip 17 between the first felt 11 and a second felt 23, forming an endless second fluid- permeable fabric.

The shoe roll 5 and the grooved roll 7 are arranged on opposite sides of the center roll 3. Downstream of the dewatering nip 17, the web 13 is passed in a manner sandwiched between the first felt 11 and the second felt 23 to a reversing suction roll 19 reversing the first felt 11 towards the pressing nip 1. The reversing suction roll 19 removes water from the web 13 and is also adapted to keep the web 13 attached to the first felt 11 and to detach the web 13 from the second felt 23. Opposite to the web 13 attached to the first felt 11 and opposite to the suction roll 19, a steam box 21 is arranged. The steam box 21 forms a web pre-heating means for heating the web 13 before it enters the pressing nip 1, thus facilitating moisture removal from the web 13 in the pressing nip 1 and further process steps.

The first felt 11 and the second felt 23 are adapted to receive and take in water or moisture from the web 13.

The web 13 arriving from a wire section of the web forming machine is picked up by a suction roll 47 by which the web 13 is attached to the first felt 11. At the end of the press section, the web 13 is picked up by a suction roll 55 to be detached from the metal belt 9 and is passed to a cylinder dryer section of the web forming machine. The web 13 is attached to the metal belt 9 within the pressing nip 1. The metal belt 9 rotates clockwise in Fig. 1 and the web 13 attached to the metal belt 9 is guided via roll 43 which can be heated to an impingement heater 25. Further, the web 13 attached to the metal belt 9 is reversed from generally upwards to generally downwards by a roll 45 and is guided to a further impingement heater 26. The impingement heaters 25, 26 constitute a web heating means according to the present invention and blow hot air directly to the web 13. The impingement heaters 25, 26 are designed for heating the web and in some extend a drying effect of the web is obtained. After having passed the impingement heaters 25, 26, a smoothing nip 29 formed by rolls 31 and 33 is arranged to smooth the web 13 attached to the metal belt 9. A cleaner 34 like a doctor blade is arranged to mechanically clean the web side roll 33 for removing web residuals from the roll 33.

The metal belt heating means 15 is arranged opposite to the metal belt 9 on both sides of the metal belt 9 for heating the metal belt 9 to a predetermined temperature. The metal belt heating means 15 may include a temperature regulation unit comprising a cooling means for avoiding overheating of the metal belt 9. The cooling function of the temperature regulation unit may have an effect on the whole width of the metal belt 9 or just partly on the edges of the metal belt 9.

With respect to the first felt 11, a steam roll 35 is arranged for cleaning and heating the first felt 11. In particular, in combination with the steam roll 35, showers and a suction box are provided.

Further, a saveall 37 is arranged for receiving water from the first and second felts 11, 23 immediately downstream of the dewatering nip 17 and a saveall 38 is arranged for receiving water from the first felt 11 immediately downstream of the pressing nip 1.

Moreover, suction boxes 39 and 40 are provided between the dewatering nip 17 and the suction roll 19, and the suction roll 19 and the pressing nip 1, respectively. The suction boxes 39 and 40 are arranged to remove water from the web 13 through the first felt 11.

A cleaner 42 like a doctor blade is arranged opposite to a roll 41 supporting the metal belt 9 for cleaning the metal belt 9 after the web 13 has been removed from the metal belt 9 by means of the suction roll 55.

Hoods 57 are provided for housing the press section for noise reduction and reducing heat loss.

The press section according to the first embodiment is preferably used in web forming machines producing paper grades and light board grades. The press section can be installed directly behind a wire section without any further nip between the wire section and the press section. The web can be supported on a single felt on the way from the wire section, through the dewatering nip and the pressing nip, so that no transfer from one felt to another felt is necessary.

In the following, a second embodiment of the present invention is described with reference to Fig. 2. Elements of the press section according to the second embodiment similar to elements of the press section according to the first embodiment are indicated with similar reference signs and their description is omitted, where appropriate. In the press section according to the second embodiment, a dewatering nip 17 is formed by a grooved center roll 3 constituting a first roll and a shoe roll 7 constituting a third roll.

Rolls 51 and 53 guiding and supporting a second felt 23 are arranged for providing a smooth inlet and outlet within an extended nip formed by the center roll 3 and the shoe roll 7.

The web 13 is sandwiched between a first felt 11 and the second felt 23 at a distance upstream of the dewatering nip 17. In particular, the web 13 is sandwiched at the position of the roll 51. Thus, according to the second embodiment, the web 13 is sandwiched between the first felt 11 and the second felt 23 on the way between the roll 51 and a reversing suction roll 19.

Unlike in the first embodiment, a metal belt heating means 15 is arranged merely on the backside of a metal belt 9. The backside of the metal belt 9 is the side opposite to the side to which the web 13 will be attached in a pressing nip 1.

Further, the press section according to the second embodiment does not include a smoothing nip.

The remaining arrangement of the press section according to the second embodiment is in general similar to the arrangement of the first embodiment.

The press section according the second embodiment using the extended nip as the dewatering nip 17 is preferably used for producing heavy paper grades and board grades. Advantageously, in a web forming machine using the press section according to the second embodiment, a further nip is provided between a wire section and the press section.

In the following, a press section according to a third embodiment of the present invention is described with reference to Fig. 3. Elements of the third embodiment similar to elements of the first and second embodiments of the present invention are indicated with the same reference signs and their description is omitted, where appropriate.

According to the third embodiment, a dewatering nip 17 is formed by a grooved center roll 3 constituting a first roll and a roll 7 constituting a third roll.

Unlike in the first and second embodiments, in the dewatering nip 17, a web 13 supported on a fabric 11 is sandwiched between the fabric 11 and a metal belt 9.

Further, the metal belt 9 forms a wrap around the center roll 3 on the way between the dewatering nip until the web 13 sandwiched by the metal belt 9 and the fabric 11 is passed through a pressing nip 1 formed by the center roll 3 and a shoe roll 5 forming a first roll according to the invention. In this way, sufficient moisture removal from the web 13 is achieved, without the need of a second fluid- permeable fabric.

Further, a suction box 59 and a suction box 60 are provided upstream of the dewatering nip 17 opposite to the felt 11.

Moreover, upstream of a smoothing nip 29 a moisturing device for surface moisturing the web 13 is provided.

Claims

Claims
1. A press section of a web forming machine comprising a pressing nip (1) formed by a first roll (3) and a second roll (5) , an endless heat-conductive metal belt (9) and an endless first fluid-permeable fabric (11), both arranged to pass through the pressing nip (1), the metal belt (9) and the first fluid-permeable fabric (11) being adapted to sandwich a web (13) in the pressing nip (1), a metal belt heating means (15) adapted to heat the metal belt (9) , and a dewatering nip (17) formed by the first roll (3) and a third roll (7) upstream of the pressing nip (1) .
2. The press section according to claim 2, wherein the metal belt (9) is impervious to fluids.
3. The press section according to claims 1 or 2, wherein the pressing nip (1) is an extended nip.
4. The press section according to any of claims 1 to 3, wherein the first roll (3) is a grooved roll.
5. The press section according to any of claims 1 to 4, wherein the second roll (5) and the third roll (7) are arranged on opposite sides of the first roll (3) .
6. The press section according to any of claims 1 to 5, wherein the second roll (5) is a shoe roll.
7. The press section according to any of claims 1 to 6, wherein the third roll (7) is a shoe roll or a grooved roll.
8. The press section according to any of claims 1 to 7, wherein the metal belt (9) is arranged to pass the pressing nip (1) on the side of the second roll (5) .
9. The press section according to any of claims 1 to 8, wherein the first fluid-permeable fabric (11) is arranged to pass the dewatering nip (17) .
10. The press section according to any of claims 1 to 9, wherein a reversing suction roll (19) adapted to reverse the first fluid-permeable fabric (11) with the web (13) thereon to guide the web (13) into the pressing nip (1) is arranged between the dewatering nip (17) and the pressing nip (1) .
11. The press section according to any of claims 1 to 10, wherein a web pre-heating means (21) is arranged opposite to the web (13) supported on the first fluid-permeable fabric (11) .
12. The press section according to claim 11, wherein the web pre-heating means (21) is a steam box.
13. The press section according to any of claims 10 to 12, comprising an endless second fluid-permeable fabric (23) arranged to pass the dewatering nip (17), wherein the first and second fluid-permeable fabrics or belts (11, 23) are adapted to sandwich the web in the dewatering nip (17) .
14. The press section according to claim 13, wherein a fabric cleaning and heating means is arranged and adapted to heat and clean the second fluid-permeable fabric (23) .
15. The press section according to any of claims 1 to 9, wherein the metal belt (9) is arranged to pass the dewatering nip (17), wherein the metal belt (9) and the first fluid-permeable fabric (11) are adapted to sandwich the web (13) in the dewatering nip (17) .
16. The press section according to any of claims 1 to 15, wherein a web heating means (25, 26) adapted to heat the web (13) attached to the metal belt (9) is arranged downstream of the pressing nip (1) .
17. The press section according to any of claims 1 to 16, wherein a smoothing nip (29) formed by two rolls (31, 33) sandwiching the metal belt (9) and the web (13) is arranged downstream of the pressing nip (1) for smoothing the web
(13) attached to the metal belt (9) .
18. The press section according to any of claims 1 to 17, wherein a fabric cleaning and heating means (35) is arranged and adapted to heat and clean the first fluid- permeable fabric.
19. A method of pressing a web in a web forming machine with the steps of passing the web (13) supported on an endless first fluid-permeable fabric (11) through a dewatering nip (17) formed by a first roll (3) and a third roll (7), heating an endless heat-conductive metal belt (9), and passing the web (13) between the first fluid-permeable fabric (11) and the heated metal belt (9) through a pressing nip (1) formed by the first roll (3) and a second roll (5) .
20. The method of pressing a web in a web forming machine according to claim 19, comprising the step of sandwiching the web (13) between the first fluid- permeable fabric (11) and a second fluid-permeable fabric (23) in the dewatering nip (17) .
21. The method of pressing a web in a web forming machine according to claim 19, comprising the step of sandwiching the web between the first fluid-permeable fabric (11) and the metal belt (9) in the dewatering nip (17) .
PCT/EP2008/054821 2008-04-21 2008-04-21 Press section of a web forming machine WO2009129842A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/054821 WO2009129842A1 (en) 2008-04-21 2008-04-21 Press section of a web forming machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/EP2008/054821 WO2009129842A1 (en) 2008-04-21 2008-04-21 Press section of a web forming machine
DE200811003815 DE112008003815T5 (en) 2008-04-21 2008-04-21 Press section of a web forming machine

Publications (1)

Publication Number Publication Date
WO2009129842A1 true WO2009129842A1 (en) 2009-10-29

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Application Number Title Priority Date Filing Date
PCT/EP2008/054821 WO2009129842A1 (en) 2008-04-21 2008-04-21 Press section of a web forming machine

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DE (1) DE112008003815T5 (en)
WO (1) WO2009129842A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2722435A1 (en) * 2012-10-18 2014-04-23 Metso Paper Inc. Belt assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3410171A1 (en) * 1983-03-25 1984-09-27 Valmet Oy Paper machine press section with a closed leadership
US5256257A (en) * 1991-01-26 1993-10-26 J. M. Voith Gmbh Press belt support for compact press section of paper making machine
DE10051649A1 (en) * 2000-10-18 2002-05-02 Voith Paper Patent Gmbh Paper web fed from first press to a second press with an endless belt passing through a higher roller at the same height as second press
DE10306247A1 (en) * 2003-02-14 2004-08-26 Voith Paper Patent Gmbh De-watering press for paper- or card web employs endless, water-impermeable, smooth belt transferring web from pressing nip to smoothing nip
DE102004060478A1 (en) * 2004-12-16 2006-06-29 Voith Paper Patent Gmbh Method of preheating papermaking web for drying or finishing, brings fibrous web into contact with hot side of endless, recirculating preheating belt
DE102006001020A1 (en) * 2006-01-07 2007-07-12 Voith Patent Gmbh Dewatering press design for papermaking industry, includes first pressing roller with suction capability, against further roller wrapped by dewatering belt

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3410171A1 (en) * 1983-03-25 1984-09-27 Valmet Oy Paper machine press section with a closed leadership
US5256257A (en) * 1991-01-26 1993-10-26 J. M. Voith Gmbh Press belt support for compact press section of paper making machine
DE10051649A1 (en) * 2000-10-18 2002-05-02 Voith Paper Patent Gmbh Paper web fed from first press to a second press with an endless belt passing through a higher roller at the same height as second press
DE10306247A1 (en) * 2003-02-14 2004-08-26 Voith Paper Patent Gmbh De-watering press for paper- or card web employs endless, water-impermeable, smooth belt transferring web from pressing nip to smoothing nip
DE102004060478A1 (en) * 2004-12-16 2006-06-29 Voith Paper Patent Gmbh Method of preheating papermaking web for drying or finishing, brings fibrous web into contact with hot side of endless, recirculating preheating belt
DE102006001020A1 (en) * 2006-01-07 2007-07-12 Voith Patent Gmbh Dewatering press design for papermaking industry, includes first pressing roller with suction capability, against further roller wrapped by dewatering belt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2722435A1 (en) * 2012-10-18 2014-04-23 Metso Paper Inc. Belt assembly

Also Published As

Publication number Publication date
DE112008003815T5 (en) 2011-03-24

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