CN102016168B - Method and apparatus for supplying fibre pulp to a formation support - Google Patents
Method and apparatus for supplying fibre pulp to a formation support Download PDFInfo
- Publication number
- CN102016168B CN102016168B CN2009801160240A CN200980116024A CN102016168B CN 102016168 B CN102016168 B CN 102016168B CN 2009801160240 A CN2009801160240 A CN 2009801160240A CN 200980116024 A CN200980116024 A CN 200980116024A CN 102016168 B CN102016168 B CN 102016168B
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- paper pulp
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- stream
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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
- D21F1/02—Head boxes of Fourdrinier machines
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Abstract
I n the method in order to supply fibre pulp to a formation support, fibre pulp is spread onto a wider area by guiding the flow coming from a supply pipe against a flow baffle (3c) located in closed space, which baffle guides and spreads the flow to a wide flow. The flow is directed towards a curved wall at the edge of the closed space, which wall directs the flow to be a substantially parallel flow to the other side of the flow baffle (3c) through a flow-through passage between the curved wall and the flow baffle (3c). The wide pulp flow coming from the other side of the flow baffle is kept fluidized by conveying the pulp flow to the flow channel (4) wherein energy is provided to the pulp flow for example via a wall limiting the flow channel after which the pulp is supplied from a wide slice (5) to a formation support (2).
Description
Technical field
The present invention relates to a kind of device that fibre pulp is supplied to the forming section support member according to claims 1 preamble.The invention still further relates to a kind of device of the method for carrying out claims 8 preambles proposition type.
Background technology
Previous known a kind of dissemination apparatus (spreading apparatus), its fibre pulp that can be used to supply with from pipe is assigned to wider zone.In this known device, paper pulp is distributed to wider zone by flat cover (flat casing), and this flat cover is perpendicular to the pipe placement and have parabolic outlines.In cover, flow-stopping plate is placed into the horizontal of the direction of the supply, scatter paper pulp in the mode by similar fan-shaped in parabola shaped inwall, paper pulp is directed to the opposite side of flow-stopping plate with concurrent flow from described inwall, and paper pulp flows out with the gap of wide front end (wide front) from the straight edge of cover.These several unit can be a plurality of placed side by side.This structure proposes in International Patent Application WO-03/016618 and Finnish patent F1-113671 and corresponding patent application WO-94/10380 in detail.In these open source literatures, also mentioned and to have formed for example wide cut material with dissemination apparatus.
Mention in patent FI-113671, dissemination apparatus is produced homogeneous web, and can make by the high impact speed to flow-stopping plate concentration be about the paper pulp fluidisation of 5% to 10% higher concentration.In this case, the homogeneous meaning is that the basic weight of web is even.
Yet, can't produce fully homogeneous web shape or the permanent product (permanent product) of sheet with the device with one or several above-mentioned distribution unit and allocation units.Fiber orientation in the web that problem is to be formed by paper pulp is unbalanced or is not optimum that in other words, fiber is not to be orientated sufficiently uniformly along the direct of travel of web.Forming web need to and need control fiber orientation with the division of the Soft flocks in the paper pulp, in order to obtain qualified web quality.In addition, the dry section (distribution) from the paper pulp stream of head box must be controlled.Web must have enough intensity (MD, CD and Z direction), so as can to provide through whole machine, uniformly, along the controlled fibre profile (distribution) of MD, CD and Z direction and along MD and the controlled humidity section (distribution) of CD direction.
The device that is called as the Paraformer head box according to above-mentioned open source literature only is used to wash engine, the paper pulp that wherein just is being cleaned is fed between two nets or two rollers, and the web that is formed by paper pulp is advanced always supportedly and can be squeezed to remove moisture.When removing the water of q.s from web, web becomes suspension directly to form slurry at the other end that installs.
If particularly use high consistency pulp, the paper pulp that namely fibre solid content is high as far as possible quality problems can occur to minimize circulation moisture.The problem that high consistency pulp with 4% to 20% supplies to product shaping section support member is, even for example make successfully interim fluidisation of paper pulp by the flow-stopping plate that paper pulp is impacted in the above-mentioned dissemination apparatus, the fiber of these concentration still extremely is easy to trend towards being gathered on the intensive network of fibers.The concentration of this paper pulp in fact has been in and has been easy to form in the concentration range of web when fiber is connected to each other.Therefore, thereby the defective that occurs in the paper pulp can be retained in the Quality Down that makes final products in the final products, and this is because the impact that can not remove again defective.For the web that high consistency pulp forms, form especially difficulty of uniform fiber orientation.
Summary of the invention
The objective of the invention is the defective that the Processing for removing high consistency pulp causes, and propose a kind ofly to be used to form wide, quality uniformly and the method and apparatus of the web that the fiber orientation is controlled.In order to realize this purpose, principal characteristic features of the method according to the invention will propose in the characteristic of claims 1.
By paper pulp stream is transported to the gap, keep fluidisation from the wide paper pulp stream of scattering the unit, on the width of paper pulp stream, limit this gap by wall, described wall forms the flow channel of the weir plate that ends at head box.By the upper wall of long distance and respectively the time of keeping of the length by paper pulp provide external energy to paper pulp, fibre pulp keeps fluidisation continuously in this case, after this paper pulp is fed into the forming section support member by wide weir plate.Behind drying stage, made the product of web form or sheet by the web that forms on the forming section support member.The web that is formed by paper pulp is 90% or higher next dry by means of be heated to dry matter content at drying section, therefore can be produced by the web of drying the paper of anti-processing.
In the method for the invention, at first scattering into the high dense fibre pulp with wide front end by means of the distribution unit can be fluidized, and can prevent from this case forming soft flocks (flock) and fibre pulp and too early solidify.In addition, several distributions unit can be used for each paper pulp stream of the one fixed width of position is separately supplied to along flowing in the identical gap that attenuates, and wherein paper pulp keeps fluidisation by the energy that offers paper pulp.Preferably bring described energy by means of the edge perpendicular to the wall in the direction restriction gap that flows to and the relative motion of paper pulp stream.Another wall can be comprised of the outer peripheral face of for example rotor, and its rotor is set to rotation, and the motion of its outer peripheral face causes described motion.Outer peripheral face and the relative motion of relative stationary solid surface (solid surface) cause the turbulent flow of the paper pulp that flows in the gap, this can prevent from forming fiber web and Soft flocks, and destroys the soft flocks that has formed.
According to preferred embodiment, the flow direction that the wall edge is formed on perpendicular to the upward-fining flow channel in side of width draws closer together each other.
Design by outer peripheral face and the surface of solids increases turbulent flow for example can form continuous local contraction and expand at flow channel.
By means of this method, can distribute water base high consistency pulp in wide zone, in order to form web shape product, so that moisture leaves paper pulp by the forming section support member.It is homogeneous that paper pulp can keep, and except basic weight distributes, can control the fiber orientation simultaneously, so that the quality of manufactured goods meets the requirements.
Description of drawings
Following, with reference to accompanying drawing the present invention is described in more detail, wherein
Fig. 1 shows according to device of the present invention with larger entity, and wherein the fibre pulp by this unit feeding is made into large surface product;
Fig. 2 shows the sectional view according to device of the present invention of observing along perpendicular to main paper pulp stream direction;
Fig. 3 shows the axonometric drawing of the device behind the end wall that removes fluidising chamber; And
Fig. 4 shows the device with several distribution unit of observing along the direct of travel of forming section support member.
The specific embodiment
Fig. 1 shows the principle of being made the product of continuous web W form by the method according to this invention.Water base high concentration fibrous suspension supplies to the head box that forms by scattering unit 3 and fluidising chamber 1 by the pump (not shown) from pulp vessel by distributing pipe 9 and supply pipe 7.Paper pulp is discharged into by weir plate from fluidising chamber 1 and extends forward continuously the also forming section support member 2 of porous, for example in the net.The concentration of fibre pulp is 4% to 20%, and the fibre pulp in this concentration range can be called as high consistency pulp.The concentration of paper pulp preferably is in 5% to 15% the scope.The fibre pulp that is carried by forming section support member 2 dewaters gradually by forming section support member 2, wherein the dry matter content of fibre pulp increases, and fiber product W begins to form viscosity structure (cohesive texture), in this viscosity structure, fiber architecture is in relative to each other fixing position and be connected to each other.Because flow to the moisture of paper pulp of forming section support member from head box relatively low, still less, and the amount of recirculated water is also little during than the paper pulp that uses normal concentration for the water of removing in this steps A that web forms.In Fig. 1, show recirculated water by the net filtering with arrow.
After forming step, bondd and without supporting and being directed to squeezing step B as the web W that advances forward without backweb, web W dewaters by mechanical expression in step B, and finally enters drying steps C, removes moisture by heating evaporation in step C.The web W that forms by this way can be the paper pulp width of cloth, board web or paper web.
The present invention is particularly suitable for producing pulp product, and wherein the machine among Fig. 1 is pulp dryer.The paper pulp width of cloth that is formed by this machine can be batched to form volume or is cut into paper.
The description of Fig. 1 only is used for the explanation position of all parts and advancing of forming section support member 2, and carries other instruments of web W to change according to machine and the product that will make.
Fig. 2 illustrates in greater detail the vertical section figure according to the structure of head box of the present invention that intercepts along the direct of travel of the direction of paper pulp stream and the web that will form.High consistency pulp is fed into head box by supply pipe 7.Paper pulp at first enters and scatters unit 3, and in scattering unit 3, paper pulp scatters from the stream (paper pulp stream) that is supply pipe 7 shape of cross sections and is continuous, the wide and thin stream (paper pulp stream) from the distribution unit to the input channel 8 of fluidising chamber 1.Continuous as the input chamber towards the tapered flow channel 4 of weir plate.Paper pulp keeps fluidisation in the following manner in flow channel.
Paper pulp scatters unit 3 and is perpendicular to the flat cover that supply pipe 7 is placed.The best shows this cover along the profile of paper pulp input direction in Fig. 3.This cover has straight flange and bent limit, and wherein supply pipe 7 is positioned on the plane of straight flange.The inside of cover is divided into two chambers by flow-stopping plate 3c, i.e. the input chamber 3a of supply pipe 7 one sides and the output chamber 3b that leads to fluidising chamber.Flow-stopping plate 3c prevents the direct circulation in the straight flange position, but has stayed the crooked distribution channel between chamber 3a and the 3b, and this bend flow is the bent margin system of route cover all, and this shape is obedient on the limit of flow-stopping plate 3c.
High consistency pulp from supply pipe 7 impacts flow-stopping plate 3c, and this forces paper pulp stream radially to be scattered towards bent limit in input chamber 3a.The wall that consists of the bent limit of cover and extend along the direction of flow-stopping plate 3c forces paper pulp to scatter to the edge, and then flows to output chamber 3b via distribution channel, flows to thus the opposite side of flow-stopping plate 3c.In output chamber 3b, paper pulp moves ahead as the flow front (flow front) with straight flange width, and continues directly to flow to the input channel 8 of the respective width of fluidisation unit, and advances to the flow channel 4 with respective width.The bent limit of cover and the shape of circulation passage can be respectively parabolic shape.In this case, the term bending also means other shapes, namely consists of the polygon of curve.The structure of scattering the unit and principle are identical with the Paraformer head box shown in the above-mentioned open source literature.
After input channel 8, pulp flow continues to flow in fluidising chamber 1 and arranges in the flow channel 4 that forms between the cylinder 6 that is indoor rotation and the curved wall 7 relative with the outer surface of this cylinder 6.Distance can keep constant between wall, and perhaps described wall can be more close each other along flowing to.In order to realize the latter, wall 7 has the radius of curvature greater than cylinder, and along the direction of pulp flow near cylinder 6, formation has the gradually narrow flow channel of curved shape substantially like this.Although the wall of flow channel 7 also can be along the radial motion of cylinder 6 adjusting " gap " between cylinder 6 and the wall 7,, the wall 7 of this flow channel is Immobile.Cylinder 6 also can be called as " rotor ", and also can be called as " stator " with respect to cylinder 6 motionless walls 7.In flow channel 4, along supplying with paper pulp on the whole length direction of basically crossing over machine-wide, term " narrows down " and " gradually narrow " refers to size in this article along perpendicular to the direction of machine-wide and the flow direction, and namely the direction along the radius of curvature of cylinder and wall diminishes.Fig. 2 shows the shape of the flow channel on whole machine-wide.
In Fig. 2, flow channel 4 flows about 90 ° angle with the slurry with respect to output chamber 3b and input channel 8 and extends, but above-mentioned angle can change in a big way; That is to say, can be from 0 ° to almost changing in 180 ° the scope.Therefore, flow channel 4 also can perhaps can extend with the angle than 90 ° less as beginning with the directly extension of input channel 8.
In the terminal of flow channel 4, wall 7 can be provided with continuous projection or the ridge along the rotor shaft direction of cylinder 6, consists of continuous constriction point or inflexion point in the transverse cross-sectional area that flows.In this zone, the average distance of wall 7 and cylinder 6 can be constant, and the design of wall surface can be used to also effectively keep turbulent flow in the end of flow channel.Projection or ridge can extend similarly to be configured on the whole machine-wide, perhaps can be interrupted with stagger arrangement and open.Also possiblely be, wall 7 is provided with independent spherical protuberances, and this is configured for keeping the corresponding design of turbulent flow.
Because wall 7 reduces along the flow direction of paper pulp radially near cylinder 6 along it, mean that under constant volume flow the linear flow rate of paper pulp increases along with the cross-sectional area of passage 4.For turbulent flow, need cylinder 6 different from the described linear flow rate on the whole length of flow channel based on the circumferential speed that rotatablely moves.When cylinder 6 rotated along the flow direction (counter clockwise direction of Fig. 2) of paper pulp, its circumferential speed should surpass the maximum line velocity based on the paper pulp of the volume flow in the passage 4.If the circumferential speed of cylinder is slower than the linear velocity of equidirectional paper pulp, then also can produce turbulent flow.Also possible is that to (clockwise direction of Fig. 2) rotation, wherein this also can make the paper pulp of the flow channel 4 of flowing through effectively give off energy to cylinder 6 against paper pulp stream.
The rotary speed of cylinder 6 depends on the concentration of paper pulp, and the concentration of the paper pulp of supplying with like this is larger, and the rotating speed that adjust is just higher.This shows that can reach fluidized point under specific rotating speed, this moment, the paper pulp of given concentration began to show as water.Cylinder 6 or rotor do not have substantial pumping effect, but its function only applies shearing force for the paper pulp that flows in passage 4.The high consistency pulp that supplies to head box is not to flow because of its deadweight, but must be introduced in by the supply arrangement that forced flow is provided the there.The actual volume flow that scatters unit 3 and fluidising chamber 1 of flowing through is produced by the underflow pump that paper pulp is supplied in the head box, and this pump can be reciprocating pump or fluidisation pump.Pump supplies to paper pulp in the head box by managing 9,7, surge tank that therebetween need not be any or similar device.
Fig. 2 shows the situation of the terminal of passage 4 best, and the place of leaving cylinder at the short terminal part of the flow channel of following cylinder outer surface is provided with zig zag, thereby consists of the short weir plate passage that finishes at weir plate 5.The terminal part of passage leaves cylinder along radially being oriented of cylinder, but this turning can more sharp-pointed or more relax, and is greater than or less than 90 °.This short terminal part of flow channel 7 is also crooked along the opposite direction of the curvature of initial part, and bends to gradually the direction of forming section support member 2.Discharge from weir plate 5 with the direction of the peripheric movement opposite direction of cylinder 6 on the paper pulp edge.Rely on the zig zag of the end of flow channel 4, the fibre pulp that flows therein can realize that direction changes fast.Zig zag produces shearing force and frictional force in the paper pulp that flows, and keeps thus fluidisation.If cylinder 6 is against the rotation of the paper pulp stream in the passage 4, then paper pulp will be discharged from weir plate 5 along the peripheric movement direction of cylinder 6.
In addition, possible is, is provided with in the end of flow channel more to relax or more level and smooth direction changes, and perhaps direction does not change.In this case, the direction that ends at the terminal part 4a of weir plate 5 only slightly departs from the direction of flow channel 4 or does not depart from.In these cases, flow channel 4 can arrange with respect to the mode of the rotor 6 among Fig. 2 with mirror image, and the position of weir plate passage 4a and the direct of travel of net remain unchanged.
The forming section support member 2 of porous also is shown through the path of head box among the figure.The lower surface of fluidising chamber 1 consists of the first slidingsurface, and the lower surface of this fluidising chamber 1 terminates in the lower limb of weir plate 5, and this slidingsurface is towards weir plate 5 guiding forming section support members.The top edge of weir plate extends to the second slidingsurface along the direct of travel of forming section support member 1.Above-mentioned surface, especially the first slidingsurface, preferred projection ground is crooked, in order to be oriented shaped part support member 2, as shown in FIG. 1.
How one or several distribution unit can broad ways be arranged side by side in the head box of machine shown in Fig. 4, and situation in the drawings is provided with three and scatters unit.Scatter unit 3 and be connected to identical fluidising chamber 1, the width of the width of this fluidising chamber and flow channel 4 equals to scatter width sum that the unit causes and stream (concurrent flow).Paper pulp supplies to unit 3 by single supply pipe.Supply pipe is connected to identical distributing pipe 9, and paper pulp is fed in this distributing pipe by the supply arrangement of for example underflow pump.Therefore, paper pulp and stream that the output chamber 3b of different units will lead to fluidising chamber 1 simultaneously supply to shared wide input channel 8 and flow channel 4, and wherein the paper pulp stream combination forming becomes the paper pulp stream of full-width web W.For example can independently adjust the paper pulp stream that flows to different diversity unit 3 by the mobile control tool that is set to supply pipe 7 according to principle known in the above-mentioned International Patent Application WO-94/10380.
One or several that is connected to fluidising chamber 1 scatters unit 3 and can be arranged on and be different from other positions that Fig. 2 and Fig. 3 have illustrated.One or more outputs chamber 3b also can angularly arrange with respect to the output channel 8 of fluidising chamber 1.
Claims (19)
1. method that is used for fibre pulp is supplied to the forming section support member, wherein by making described fibre pulp spread to wider zone against the flow-stopping plate that is positioned at enclosure space (3c) guiding from the paper pulp stream of supply pipe, described flow-stopping plate guides paper pulp stream and scatter into the wide paper pulp stream towards the curved wall orientation that is positioned at described enclosure space edge, described curved wall with described paper pulp stream be oriented substantially and stream, and make described paper pulp stream arrive the opposite side of described flow-stopping plate (3c) by the distribution channel that is positioned between described curved wall and described flow-stopping plate (3c) edge, it is characterized in that
By described paper pulp stream being transported to flow channel (4), described wide paper pulp stream from described flow-stopping plate opposite side keeps fluidisation, wherein by means of the motion of one of them wall of described flow channel (4) energy is offered described paper pulp stream via the wall that limits described flow channel, the speed of described wall motion is different from the speed of paper pulp stream described in the described flow channel (4); And
Described paper pulp stream is introduced in the flow channel (4) that attenuates along the direction perpendicular to the width of described paper pulp stream, and after this described paper pulp weir plate (5) leniently is fed into forming section support member (2).
2. method according to claim 1 is characterized in that, forms with the described wall of the speed motion that the is different from described paper pulp stream speed outer peripheral face by the cylinder that rotates in fluidising chamber (6).
3. method according to claim 1 is characterized in that, by means of the surface design of one or two wall energy is offered described paper pulp stream.
4. method according to claim 2 is characterized in that, by means of the surface design of one or two wall energy is offered described paper pulp stream.
5. according to claim 2 or 3 or 4 described methods, it is characterized in that the concentration of fibre pulp to be supplied with is 4% to 20%.
6. method according to claim 1 is characterized in that, the concentration of fibre pulp to be supplied with is 4% to 20%.
7. method according to claim 5 is characterized in that, the concentration of fibre pulp to be supplied with is 5% to 15%.
8. according to claim 1 and 2 or 3 or 4 or 6 described methods, it is characterized in that, described paper pulp is as being supplied with simultaneously against the independent paper pulp stream of two or several flow-stopping plates (3c), and described flow-stopping plate produces the paper pulp stream that is combined and is directed to the distribution of described flow channel (4).
9. according to claim 1 and 2 or 3 or 4 or 6 described methods, it is characterized in that, after drying stage, make web or sheet products by the web (W) that is formed on the described forming section support member (2).
10. device that is used for fibre pulp is supplied to the forming section support member, this device comprises: the distribution unit (3) of fibre pulp, the supply pipe of fibre pulp (7) is connected in the described distribution unit, and described distribution unit comprises enclosure space; Flow-stopping plate, (3c), in described space, be limited with and be positioned at described supply pipe, the input chamber of (7) one sides, (3a) with the output chamber that is positioned at the outlet side of described fibre pulp, (3b), wherein said input chamber and described output chamber are by described flow-stopping plate, (3c) edge and limit the distribution channel between the curved wall in described space and be connected to each other, in order to described paper pulp stream is passed through described flow-stopping plate, (3c) directed and be directed to diffusedly described output chamber, a side (3b), and become substantially and stream, it is characterized in that
Fluidising chamber (1) follows in described output chamber (3b) afterwards along the flow direction of described paper pulp stream, described fluidising chamber (1) comprises flow channel (4), described flow channel (4) edge attenuates towards weir plate (5) perpendicular to the direction of the width of described paper pulp
Described flow channel (4) comprises the wall that limits described flow channel (4), and described wall is configured to energy is offered described paper pulp stream; And
Described flow channel (4) ends at described weir plate (5), in order to described paper pulp is supplied to described forming section support member (2).
11. device according to claim 10 is characterized in that, limit described flow channel (4), to be arranged to provide the described wall of energy be the outer peripheral face that is arranged in the cylinder (6) that rotates in the described fluidising chamber.
12. device according to claim 10 is characterized in that, the described wall that limits described flow channel (4) has the surface design that is configured to energy is offered described paper pulp stream.
13. device according to claim 11 is characterized in that, the described wall that limits described flow channel (4) has the surface design that is configured to energy is offered described paper pulp stream.
14. device according to claim 12 is characterized in that, the described surface that limits the described wall of described flow channel (4) is formed in continuous constriction point or the inflexion point in the transverse cross-sectional area of described paper pulp stream.
15. device according to claim 13 is characterized in that, the described surface that limits the described wall of described flow channel (4) is formed in continuous constriction point or the inflexion point in the transverse cross-sectional area of described paper pulp stream.
16., it is characterized in that the terminal of described flow channel (4) is provided with zig zag according to each described device among the aforementioned claim 10-15, described flow channel forwards the short terminal part that ends at described weir plate (5) at described sharp turn.
17. according to each described device among the aforementioned claim 10-15, it is characterized in that, be provided with abreast two or more distribution unit (3) that are connected to identical fluidising chamber (1).
18., it is characterized in that the described supply pipe (7) of described distribution unit (3) is connected to the fibre pulp source according to each described device among the aforementioned claim 10-15, the concentration of described fibre pulp is 4% to 20%.
19. device according to claim 18 is characterized in that, the described supply pipe (7) of described distribution unit (3) is connected to the fibre pulp source, and the concentration of described fibre pulp is 5% to 15%.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20085440A FI121964B (en) | 2008-05-09 | 2008-05-09 | Method and apparatus for feeding fibrous pulp to a forming substrate |
| FI20085440 | 2008-05-09 | ||
| PCT/FI2009/050377 WO2009136008A2 (en) | 2008-05-09 | 2009-05-08 | Method and apparatus for supplying fibre pulp to a formation support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102016168A CN102016168A (en) | 2011-04-13 |
| CN102016168B true CN102016168B (en) | 2013-03-13 |
Family
ID=39523095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801160240A Expired - Fee Related CN102016168B (en) | 2008-05-09 | 2009-05-08 | Method and apparatus for supplying fibre pulp to a formation support |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN102016168B (en) |
| AT (1) | AT508526B1 (en) |
| DE (1) | DE112009000825T5 (en) |
| FI (1) | FI121964B (en) |
| WO (1) | WO2009136008A2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2907916A1 (en) * | 2014-02-12 | 2015-08-19 | Mayr-Melnhof Karton AG | Method and apparatus for producing a multilayer fibrous web with one or more layers, and multilayer fibrous web with one or more layers produced according to the method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5816507A (en) * | 1994-08-10 | 1998-10-06 | Centre Technique De L'industrie Des Papiers | Device for formation of a fan jet of liquid |
| CN1377435A (en) * | 1999-10-04 | 2002-10-30 | 麦特索纸业公司 | Procedure and means for generating turbulence in stock suspension flow |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE500546C2 (en) | 1992-11-04 | 1994-07-11 | Sunds Defibrator Ind Ab | Method and apparatus for cross-distributing a streaming medium |
| FI102091B (en) * | 1997-06-30 | 1998-10-15 | Valmet Corp | Inlet box for a paper machine / board machine |
| SE521176C2 (en) | 2001-08-15 | 2003-10-07 | Metso Paper Inc | Distribution device for even distribution and cross-distribution of a streaming medium |
-
2008
- 2008-05-09 FI FI20085440A patent/FI121964B/en not_active IP Right Cessation
-
2009
- 2009-05-08 DE DE112009000825T patent/DE112009000825T5/en not_active Withdrawn
- 2009-05-08 CN CN2009801160240A patent/CN102016168B/en not_active Expired - Fee Related
- 2009-05-08 AT ATA9144/2009A patent/AT508526B1/en not_active IP Right Cessation
- 2009-05-08 WO PCT/FI2009/050377 patent/WO2009136008A2/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5816507A (en) * | 1994-08-10 | 1998-10-06 | Centre Technique De L'industrie Des Papiers | Device for formation of a fan jet of liquid |
| CN1377435A (en) * | 1999-10-04 | 2002-10-30 | 麦特索纸业公司 | Procedure and means for generating turbulence in stock suspension flow |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009136008A3 (en) | 2010-03-11 |
| DE112009000825T5 (en) | 2011-03-24 |
| AT508526B1 (en) | 2012-09-15 |
| FI20085440A (en) | 2009-11-10 |
| AT508526A3 (en) | 2012-06-15 |
| AT508526A2 (en) | 2011-02-15 |
| FI20085440A0 (en) | 2008-05-09 |
| WO2009136008A2 (en) | 2009-11-12 |
| FI121964B (en) | 2011-06-30 |
| CN102016168A (en) | 2011-04-13 |
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