EP3532672A1 - Method for operating a machine for producing a fibrous web and machine for producing a fibrous web - Google Patents
Method for operating a machine for producing a fibrous web and machine for producing a fibrous webInfo
- Publication number
- EP3532672A1 EP3532672A1 EP17772709.6A EP17772709A EP3532672A1 EP 3532672 A1 EP3532672 A1 EP 3532672A1 EP 17772709 A EP17772709 A EP 17772709A EP 3532672 A1 EP3532672 A1 EP 3532672A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- machine
- value
- fibrous web
- dewatering
- inclination
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000000725 suspension Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 230000006870 function Effects 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 239000000123 paper Substances 0.000 description 16
- 238000004891 communication Methods 0.000 description 12
- 239000000835 fiber Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/48—Suction apparatus
- D21F1/483—Drainage foils and bars
- D21F1/486—Drainage foils and bars adjustable
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/48—Suction apparatus
- D21F1/52—Suction boxes without rolls
Definitions
- the present invention relates to a method for operating a machine for producing a fibrous web, in particular a paper, cardboard or packaging paper web, from at least one pulp suspension, comprising a dewatering device with a plurality of pivotally designed drainage strips, in detail according to the independent claim.
- Such machines have drainage devices, also called 10 drainage boxes on. These serve to support an endless, continuous screen, on which the fibrous web is formed from the continuously flowing on the screen pulp suspension.
- the drainage device has - seen in the direction of the fibrous web to be produced - a plurality of juxtaposed spaced apart drainage strips. This 15 strokes the sieve with its underside over the top of the upper part of the drainage strips.
- the upper part faces the sieve and generally has a wearing part which is connected to the upper part.
- the wear part usually has a scraper-like front edge. This additionally serves to remove the white water which has flowed out of the forming fibrous web through the meshes of the sieve and adheres to the underside of the sieve.
- Individual or all drainage strips are designed to be pivotable in order to be able to adapt the drainage performance to the type of paper produced, depending on the angle of inclination.
- disturbances frequently occur during operation which necessitate a change in the angle of inclination during operation of the machine.
- Such disturbances are, for example, a dry content of the produced fibrous web which has changed compared with an initial specification and which actually sets itself in operation.
- the invention relates to the aforementioned objects.
- the invention has for its object to avoid the disadvantages of the prior art. Rather, a reliable indication of the actually set angle of inclination of the drainage strips and a change in the angle of inclination during operation should be possible in order to be able to react to changed operating parameters of the machine.
- the inclination angle of the pivotally designed drainage strips of the dewatering device and thus its drainage performance is regulated.
- the setpoint for the angle of inclination is the command or manipulated variable for the pivoting device
- angle of inclination is understood to mean an angle which corresponds to the slope of the drainage strip in relation to a flow angle.
- angle of inclination is understood to mean the control value Indicates horizontal plane.
- the angle is meant that the upper side - preferably that of the upper part - encloses the drainage strip, which faces the underside of the screen rotating therewith, with the horizontal plane.
- the inclination angle can be determined both as gradient angle in% and in degree. He thus indicates the relative change in position of the drainage bar - or the upper part of the drainage bar - to the horizontal (or horizontal plane).
- the drainage strip can be constructed from an upper part and a lower part, wherein the lower part is connected to a base body of the dewatering device stationary, ie fixed.
- the upper part is then pivotable relative to a rotation axis which runs parallel to the longitudinal axis of the dewatering strip.
- the longitudinal axis may, for example, correspond to the width direction of the fibrous web or the wire.
- the axis of rotation thus runs substantially parallel to the plane which is spanned by the wire or by the fibrous web when passing over the dewatering strip. Essentially, this means that a deviation by 10 °, preferably by 20 ° to both sides is possible.
- the angle of inclination thus results from the pivoting movement of the upper part relative to the lower part or to the main body of the dewatering device about said rotation axis.
- the position of this axis of rotation can also be non-stationary, ie the axis of rotation can pivot itself as a result of the upper part.
- the corresponding pivoting movement can be achieved that the front edge of the upper part remains in the plane of the sieve.
- the angle of inclination can be understood as the angle which results from rotation of the upper part relative to the lower part about the X-axis.
- the angle of inclination could also describe a corresponding rotation of the dewatering strip or its upper part relative to the horizontal plane about one or more of said axes (X, Y, Z axis). This will be done below with reference to the tilt sensor.
- the inclination sensor, the control device or the display device can be set up in such a way that the actual (current) inclination angle of the swiveling drainage strip (s) is determined or displayed, for example, in degrees as an absolute value or as a relative value with respect to a horizontal plane or to the basic body.
- the angle of inclination can be present as an electrical signal.
- the inclination sensor is set up in such a way that it detects not only one-dimensional angles, ie in the example above, the rotation only about one of the three axes (X, Y or Z axis), but multidimensional angles.
- the inclination sensor would thus be a position sensor and could thus detect a combination of several inclination angles simultaneously about several of the three axes (X, Y or Z axis).
- a detection in at least two axes, for example the X and Y-axis has the advantage that when installing the dewatering strips on the main body of the dewatering device, the measured values of the inclination sensors equal horizontal alignment along the X-axis, since unwanted deviations around the Y -Axis can be detected immediately by these. This also makes it possible to check whether the entire dewatering device is correctly aligned with the dewatering strips.
- each drainage bar can each be associated with a corresponding pivoting device and an inclination sensor. Both can be housed within the corresponding drainage bar - preferably encapsulated against entry of media from outside.
- the pivoting device can be designed such that the upper part of the dewatering strip is pivotable relative to the lower part (or the horizontal plane) by at least 10 °, preferably by at least 20 °.
- a control device can then be assigned to all pivoting means of the swiveling drainage strips together.
- the individual pivoting devices and the inclination sensors of the swiveling drainage strips can be connected to the control device via corresponding communication channels.
- a communication channel is a means for information transmission, e.g. meant by an electrical signal.
- Such devices may be in the form of wired lines as well as wireless communication devices (radio). It is also conceivable that the signal originating from the at least one inclination sensor is transmitted to a mobile terminal, such as a smartphone, a tablet PC or the like.
- a dewatering strip according to the invention is usually longer than the width of the fibrous web to be produced.
- at most with reference to a minimum or maximum value according to the invention, it is meant that the value 0 or greater is 0, but includes at most the value according to the invention (minimum or maximum value).
- maximum 150% it means the interval between (including or greater) 0% and (including or exactly) 150%.
- a fibrous web is to be understood as meaning a scrim of fibers, such as cellulose, synthetic fibers, glass fibers, carbon fibers, additives, additives or the like.
- the fibrous web may be formed, for example, as a paper, cardboard or tissue web. It may essentially comprise wood fibers, with small amounts of other fibers or additives and additives may be present. Depending on the application, this is left to the skilled person.
- a fibrous web With the type of a fibrous web is meant the property of the fibrous web in terms of their composition, production, as well as appearance and use. If the fibrous web is a paper, then under a type of paper, e.g. a coated paper, copy paper, label paper, etc. to understand.
- the term intended operation is understood to mean that state of the machine in which the desired fibrous web is produced from the pulp suspension and further processed on the machine. Specifically, in this state, the wire of the wire section continuously moves past it, relative to the dewatering device, the pulp suspension reaches the wire, and the excess water is drained through the dewatering slots for dewatering. In contrast to this is in a non-operating state of the machine, ie when decommissioning this example, with the aim of maintenance, such a production of the fibrous web is not possible.
- the start of operation is the time at which the machine is ready to actually manufacture the fibrous web. In this state, the machine is equipped for the fibrous web and ready to immediately start up as intended.
- a constant value is understood to be a property of the fibrous web or the machine itself that is produced before the start of operation or that is theoretically assumed for the production of the fibrous web.
- a property of Fibrous web may be the raw material of which it is made, the chemicals that comprise it or their variety.
- a characteristic of the machine may be its design with regard to the shape of the drainage, such as a fourdrinier or hybrid former, their features such as the number and type of screens and rollers or their calculated theoretical machine speed necessary to make the fibrous web.
- the constant value is a parameter that is specified at the start of operation of the machine. It is therefore assumed to be constant, as it is assumed that this does not change during operation of the machine.
- process parameter is meant a (directly detected) or determined (indirectly determined, for example by calculation) during (intended) operation of the machine, which is the actual property of the pulp suspension, the fibrous web currently being made, or an actual, self-adjusting size describes the machine.
- a process parameter may be exemplary: the actual machine or wire speed, the energy required, e.g. electrical energy, or an associated quantity such as the power, the fresh water requirement of the machine measured in liters per hour, an optical or physical property of the fibrous web just produced, such as their formation result (size distribution and anisotropy of spots in the see-through, periodicity of recurrent features), Basis weight, consistency or their dry content - also based on corresponding single- or multi-ply fibrous webs.
- the process parameter is thus subjected to changes during the manufacturing process during operation of the machine.
- Both the constant value and the process parameters represent at least one parameter in the sense of the present invention, on the basis of which the regulation of the angle of inclination of the swiveling drainage strips takes place.
- a control can be carried out simultaneously on the basis of both parameters.
- control device If it is mentioned that information is stored in the control device, then it may be stored in a memory assigned to the control device. So it is possible in this way, in the control device information, e.g. in the form of databases, tables, curves or maps, to which type of fibrous web to be produced which information belongs. Thus, for each fibrous web type that can be produced with the machine, a corresponding data record with the necessary constant values can be stored. For example, based on a constant value, which characterizes the fibrous web to be produced, the control device calculates a desired value for the inclination angle to be set at the start of operation of the machine - also called the reference value.
- the coarse or fine control can be influenced by a manual specification. So it would be possible to specify a corresponding setpoint for coarse or fine control.
- a specification can be transmitted by means of a mobile terminal, such as a smartphone, a tablet PC or the like, preferably wirelessly via a corresponding communication channel to the control device.
- the mobile terminal it is also possible in principle by means of the mobile terminal to override the coarse or fine control of the inclination angle, ie to override this and the corresponding inclination angle - also separately for each dewatering strip - set by means of this terminal.
- the invention also relates to the use of a above-mentioned mobile terminal for adjusting the angle of inclination of at least one dewatering strip of a dewatering device according to the invention.
- the memory may be part of the controller itself.
- the control device in turn can be part of the control station of the machine.
- the control device may further comprise a processing unit, such as a microprocessor, to determine the control difference between the setpoint and the actual value and in order to be able to calculate a corresponding input variable for the pivoting device from this.
- a processing unit such as a microprocessor
- the invention also relates to a machine for producing a fibrous web, in particular paper, cardboard or packaging paper web, from at least one pulp suspension, comprising a dewatering device with a plurality of pivotally running drainage strips, at least one pivotable dewatering device associated pivoting device and a control device, wherein the control device is set up so that it carries out the method according to the invention. Furthermore, the invention also relates to the dewatering device according to the invention and a wire section comprising such a dewatering device.
- the invention also relates to a system comprising at least one swiveling drainage strip, at least one associated tilt sensor, at least one associated pivoting device and a control device which is connected via respective communication channels on the one hand with the tilt sensor and on the other hand with the pivoting device and is preferably arranged such that it carries out a method according to the invention.
- Figure 1 is a schematic, partially longitudinal sectional view of a
- FIG. 2 shows a detailed view of the dewatering device from FIG.
- Figures 3a and 3b is a partially sectioned view of an embodiment of
- Figure 3c is a plan view of an embodiment of a
- FIG. 4 is a schematic diagram of a control scheme for a
- FIG. 5 shows a control loop for controlling the angle of inclination of at least one dewatering strip.
- FIG. 1 shows a schematic, partially longitudinal sectional view of a wire section 200 of a machine 100, only partially shown, for producing a fibrous web 2 from at least one fibrous stock suspension.
- the machine direction L runs here from left to right.
- the fibrous web 2 may in particular be a paper, board or packaging paper web.
- the pulp suspension passes from a headbox to a screen designed as an endless belt, which rotates relative to the dewatering device 1.
- the fibers deposited on the upper side of the sieve are transported further with this.
- the excess water of the pulp suspension passes through the bottom of the screen in the dewatering device.
- FIG. 2 shows a detail view of the dewatering device 1 from FIG.
- the dewatering device 1 may be part of the wire section 200 of the machine 100 shown in FIG.
- the dewatering device 1 comprises a box-shaped main body 4, which can optionally be acted upon by a vacuum source 3 indicated by dashed lines and preferably controllable.
- the latter serves to improve the dewatering of the pulp suspension, is assigned to the wire section 200 and in the present case is arranged inside the main body 4.
- the Entskyssanssologyn 5 are seen in the machine direction L, which corresponds to the direction of the fiber web to be produced in the machine, spaced from each other. In the present case, these are arranged parallel to one another with respect to their longitudinal axes which extend transversely to the machine direction L into the image plane.
- Each two directly adjacent drainage strips 5 limit together at their mutually facing end faces a drainage slot 6. If the Entskyss fürselfn 5 arranged as shown in Figure 2, then preferably form a flat and a plurality of drainage slots 6 having drainage surface 5 'together. The latter runs essentially parallel to the screen or the fibrous web 2 to be produced thereon.
- Each of the individual drainage strip 5 comprises an upper part 7 facing the sieve and a lower part 8 facing the main body 4.
- the latter is connected stationarily to the main body 4.
- FIGS. 3a and 3b each show a cross section through the drainage strip 5 perpendicular to its longitudinal axis.
- the upper part 7 is in this case made in two parts. It comprises a U-shaped first part, on which a second part (also called wear part), which faces the fibrous web, is arranged.
- the second part can be detachably connectable to the first part in a non-destructively replaceable manner.
- the lower part 8 engages in, as indicated here by the dashed representation.
- Some or all of the drainage strips 5 of the drainage device 1 shown in the figures can be made pivotable.
- Each of these dewatering strips 5 can then be assigned a pivoting device 9 in order to pivot the dewatering strip 5 relative to the basic body 4 on which it is mounted.
- such a pivoting device 9 may be arranged within the dewatering strip 5 between the lower part 8 and the upper part 7. It can be completely encapsulated against the entry of media from the outside.
- the axis of rotation about which the upper part 7 can be pivoted by means of the pivoting device 9 is presently parallel to the longitudinal axis of the dewatering element 5 and thus transversely to the machine direction. It runs, as shown, in the drawing plane and is indicated in the figures with a dot.
- a tilt sensor 10 is arranged in the portion of the U, which connects the two lateral legs of the upper part 7, a tilt sensor 10 is arranged. As shown in FIG. 3b, by means of the inclination sensor 10, the actual dewatering strip (s) 5 actually present can be present Tilt angle of the upper part 7 to a horizontal plane (shown in phantom) or the main body 4 are detected directly.
- the inclination sensor 10 can be arranged within the upper part 7 such that it detects the inclination angle of the upper part 7, preferably the outer, the underside of the screen or the fibrous web facing side of the upper part 7 against the horizontal plane.
- the inclination sensor 10 may be integral with the drainage bar, here the upper part 7 or be provided separately thereto. In the latter case, this material, force and / or positively connected to the drainage strip or the upper part 7.
- FIG. 3c shows a drainage strip 5 over its entire length in a plan view perpendicular to the fibrous web to be produced (not shown).
- the pivotally designed drainage strip 5 are here seen over the length equal to several inclination sensors 10 assigned. It would be conceivable that the drainage strip 5 is divided along its length (corresponding to the width direction of the fibrous web to be produced) into several sections. This is indicated by the dotted lines. Each section may be associated with a separate pivoting device 9 and a separate tilt sensor 10. As a result, the individual sections of a single dewatering strip 5 can independently assume a different angle of inclination. Regardless of the illustrated embodiment, the inclination sensors 10 may be disposed within the respective dewatering strip 5, eg within the space bounded by the upper and lower parts 7, 8. They can also be sealed or encapsulated against the entry of media from the outside.
- FIG 4 is a circuit diagram for controlling the inclination angle of the dewatering device 1 according to the invention, which is part of the invention Machine 100 is shown. Shown is merely a drainage strip 5. However, this circuit diagram is also applicable to the remaining drainage strips 5 of the dewatering device 1.
- the inclination sensor 10 of a corresponding dewatering strip 5 is connected via a first communication channel 1 1 with a control device 12 in order to transmit the actual inclination angle of the dewatering strip 5 to the control device 12.
- the control device 12 is connected via a second communication channel 13 with the pivoting device 9 of the drainage strip 5 for adjusting the inclination of the drainage strip 5.
- the control device 12 can thus respond to the pivoting device 9 via the second communication channel 13 in order to set a specific angle of inclination.
- the control device is connected via a third communication channel 14 with a display device 15 in order to graphically display the inclination angle (s) of one or more drainage strips 5, for example.
- control device 12 may be connected to the control of the machine 100.
- both current process parameters of the machine such as e.g. their energy demand or machine speed as well as properties of the pulp suspension or of the fibrous web produced therefrom, such as their raw materials or consistency as a predetermined size transmitted to the control device 12.
- controller 12 may be associated with a memory 17 in which constant values, e.g. the types of fibrous webs that can be produced on the machine, for example in the form of a database, are stored.
- a desired value w is first predetermined by the control device 12 for the inclination angle to be set.
- the desired value w may e.g. be predetermined at the beginning of the production process of the fibrous web as a function of a constant value.
- the control device 12 follows in the memory 17, e.g. which fibrous web grade is currently being produced. With this information, the controller 12 determines the initial inclination angle (also called the reference value) that the corresponding dewatering strip 5 should occupy at the beginning of the fibrous web production. This corresponds to a coarse control of the angle of inclination.
- the current, actually set inclination angle of the dewatering strip 5 is detected by means of the inclination sensor 10 and also transmitted as an actual value y to the control device 12.
- the latter forms a control difference e from the desired value w and the actual value y of the inclination angle. From this control difference e, the control device 12 determines a corresponding input variable u, with which it responds to the pivoting device 9 in order to set the inclination angle corresponding to the control difference e.
- the machine 100 can start operation and dewater the fibrous web by means of the dewatering device whose dewatering strips are inclined to a preset reference value.
- the coarse control can be followed by a fine control of the tilt angle or superimposed.
- the control loop is run again as described above.
- another parameter namely a process parameter which generally changes during operation, is now used for the fine control.
- Such a process parameter may be the actual screen speed of the screen of the wire section 200.
- the preset setpoint of the inclination angle from the coarse control can be used as the reference value. From this reference value, the desired value can then be changed (enlarged or reduced) according to the process parameter in the fine control.
- the reference value is then used as the basis for the further control in operation - ie for the fine control.
- the setpoint value (based on the method parameter) determined by the control device 12 is compared with the reference value. If the specific setpoint of the fine control deviates from the reference value, then the specific setpoint is set. However, this only applies as long as the specific setpoint of the fine control does not exceed a range around the reference value.
- the range around the reference value is limited on the one hand by a maximum value which is greater than the reference value and on the other hand by a minimum value which is smaller than the reference value.
- the desired value is within this range as a function of the process parameter, it is set to the actually calculated desired value. However, as soon as it lies outside the range spanned by the minimum and maximum values, the corresponding minimum or maximum value is set. For example, it is conceivable that the maximum value is at most 150% and the minimum value is at most 50% of the reference value.
- the regulation can take as long as the effective adjustment of the inclination angle, ie the actual present inclination angle of the corresponding dewatering strip 5 is determined by the control device 12 via the first communication channel 1 1.
- the corresponding pivoting device 9 of the swiveling drainage strips 5 could also be configured such that, in addition to the pivoting movement, it also permits axial movement of the upper part 7 relative to the lower part 8 in the direction of a perpendicular to the fibrous web.
- the height of the upper part 7 with respect to the lower part 8 or the main body 4 could be adjusted.
- the invention has the advantage that in machines in which the operating conditions frequently change a corresponding change of said angle of inclination to the dewatering strips during operation of the machine is easy and quick to implement.
- the efficiency of the drainage can be increased depending on the conditions of the machine or the fibrous web to be produced.
Landscapes
- Paper (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016120647.4A DE102016120647B4 (en) | 2016-10-28 | 2016-10-28 | Method for operating a machine for producing a fibrous web |
PCT/EP2017/074429 WO2018077558A1 (en) | 2016-10-28 | 2017-09-27 | Method for operating a machine for producing a fibrous web and machine for producing a fibrous web |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3532672A1 true EP3532672A1 (en) | 2019-09-04 |
Family
ID=59969169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17772709.6A Withdrawn EP3532672A1 (en) | 2016-10-28 | 2017-09-27 | Method for operating a machine for producing a fibrous web and machine for producing a fibrous web |
Country Status (5)
Country | Link |
---|---|
US (1) | US10920373B2 (en) |
EP (1) | EP3532672A1 (en) |
CN (1) | CN109863271B (en) |
DE (1) | DE102016120647B4 (en) |
WO (1) | WO2018077558A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112575608A (en) * | 2020-12-03 | 2021-03-30 | 无锡福贝斯新材料科技有限公司 | Ceramic dewatering element |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5169500A (en) * | 1991-10-15 | 1992-12-08 | Wilbanks International | Adjustable angle foil for paper making machine with rigid foil body and cam actuation means |
AT400158B (en) * | 1993-12-21 | 1995-10-25 | Bartelmuss Klaus Ing | DEVICE FOR ADJUSTING THE ALTITUDE AND OR OR THE ANGLE POSITION OF A STRIP ASSIGNED TO THE SCREENING BELT OF A PAPER PRODUCTION PLANT |
US6274002B1 (en) | 1998-06-23 | 2001-08-14 | Wilbanks International, Inc. | Papermaking machine with variable dewatering elements including variable pulse turbulation blades adjusted by computer control system in response to sensors of paper sheet characteristics |
CA2276095A1 (en) * | 1998-06-23 | 1999-12-23 | Dean A. Rulis | Papermaking machine with variable dewatering elements adjusted by computer control system in response to sensors of paper sheet characteristics |
US6372093B1 (en) * | 2001-04-26 | 2002-04-16 | Wilbanks International, Inc. | Adjustable foil apparatus for papermaking machine |
FI20012175A (en) * | 2001-11-09 | 2003-05-10 | Metso Paper Automation Oy | Method and apparatus for controlling the operation of a wire section |
CN101522987B (en) * | 2006-02-03 | 2012-11-28 | 路易斯·费尔南多·卡布雷拉Y洛佩斯卡拉姆 | Fiber mat forming apparatus and method of preserving the hydrodynamic processes needed to form a paper sheet |
DE102008040032A1 (en) * | 2008-06-30 | 2009-12-31 | Voith Patent Gmbh | Strip arrangement for a machine for producing a fibrous web |
DE102008040688A1 (en) * | 2008-07-24 | 2010-01-28 | Voith Patent Gmbh | Method for optimizing the energy balance in forming units in machines for producing fibrous webs and forming unit |
US8551293B2 (en) * | 2011-04-21 | 2013-10-08 | Ibs Corp. | Method and machine for manufacturing paper products using Fourdrinier forming |
US20150292158A1 (en) * | 2012-09-28 | 2015-10-15 | Voith Patent Gmbh | Method for controlling the formation of a fiber web of a fiber or paper producing process |
-
2016
- 2016-10-28 DE DE102016120647.4A patent/DE102016120647B4/en active Active
-
2017
- 2017-09-27 EP EP17772709.6A patent/EP3532672A1/en not_active Withdrawn
- 2017-09-27 WO PCT/EP2017/074429 patent/WO2018077558A1/en unknown
- 2017-09-27 CN CN201780065208.3A patent/CN109863271B/en active Active
- 2017-09-27 US US16/343,051 patent/US10920373B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE102016120647A1 (en) | 2018-05-03 |
CN109863271A (en) | 2019-06-07 |
WO2018077558A1 (en) | 2018-05-03 |
US10920373B2 (en) | 2021-02-16 |
CN109863271B (en) | 2021-03-09 |
US20200048835A1 (en) | 2020-02-13 |
DE102016120647B4 (en) | 2018-07-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69734687T2 (en) | cigarette paper | |
DE3100713A1 (en) | PAPER MACHINE WITH TWO MOVABLE WATERPROOF DRAINAGE TAPES, E.g. SEVEN" | |
EP1637651A1 (en) | Machine for the manufacture of a fiber web | |
DE19733454A1 (en) | Method and device for detecting and correcting a fiber orientation cross profile change | |
DE10260814A1 (en) | Method and arrangement in connection with a paper machine or a device for further processing a paper web | |
DE102016120647B4 (en) | Method for operating a machine for producing a fibrous web | |
DE102016120646B4 (en) | dehydrator | |
DE69713104T2 (en) | DOUBLE SCREEN FORM FOR A PAPER MACHINE | |
DE2319906A1 (en) | METHOD AND DEVICE FOR MANUFACTURING A CONTINUOUS TAPE OF MATERIAL FROM FIBER PARTICLES | |
DE102008000267A1 (en) | Method of drainage and drainage device | |
EP0898013A2 (en) | Apparatus and process for controlling or regulating a web property profile | |
DE69620464T2 (en) | BLADE HOLDER | |
DE102008040688A1 (en) | Method for optimizing the energy balance in forming units in machines for producing fibrous webs and forming unit | |
DE4219292A1 (en) | Twin wire former | |
WO1993012291A1 (en) | Twin-wire former | |
DE9212448U1 (en) | Double wire former with locally adjustable drainage bar | |
DE4423695A1 (en) | Automatic control of multi-layer head box on paper or board machine | |
DE1461155A1 (en) | Method and device for dewatering an aqueous paper stock suspension in paper machines | |
EP3693509B1 (en) | Forming section for a machine for producing a multi-ply fibrous web and method of producing a multi-ply fibrous web | |
EP2606177A2 (en) | Method for filtering suspensions | |
AT505346B1 (en) | PROFILE REGULATION FOR A CALANDER | |
DE102004056643A1 (en) | Sucking/blowing roller for production and improvement of paper, cardboard and tissue, comprises rotatable openings exhibiting roll shell and solid pressure boxes connected by tubing/hose line with negative and/or positive pressure sources | |
EP1075568A1 (en) | Machine and method for producing a multilayer web of fibrous material | |
EP0824159A2 (en) | Process and apparatus for making a fibrous web | |
AT17429U1 (en) | SUCTION BOX OF A FIBER WEB MACHINE AND FIBER WEB MACHINE |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20190528 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: JASCHINSKI, THOMAS Inventor name: ATTWENGER, ROBERT Inventor name: CUSTODIO DE ARAUJO, GUILHERME |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VOITH PATENT GMBH |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: CUSTODIO DE ARAUJO, GUILHERME Inventor name: ATTWENGER, ROBERT Inventor name: JASCHINSKI, THOMAS |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20221026 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Effective date: 20231116 |