CA2507274C - Doctor for a paper or board machine - Google Patents
Doctor for a paper or board machine Download PDFInfo
- Publication number
- CA2507274C CA2507274C CA002507274A CA2507274A CA2507274C CA 2507274 C CA2507274 C CA 2507274C CA 002507274 A CA002507274 A CA 002507274A CA 2507274 A CA2507274 A CA 2507274A CA 2507274 C CA2507274 C CA 2507274C
- Authority
- CA
- Canada
- Prior art keywords
- doctor
- blow
- web
- down device
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G3/00—Doctors
- D21G3/005—Doctor knifes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0063—Devices for threading a web tail through a paper-making machine
Landscapes
- Paper (AREA)
Abstract
The invention relates to a doctor for a paper or board machine, which doctor is disposed in connection with a roll or a cylinder/drum (10) of the paper o r board machine to keep the surface of the roll or the cylinder/drum (10) clea n, which doctor (20) comprises a doctor blade (21) of the doctor to prevent a w eb (W) from wrapping around the roll or the cylinder/drum (10) during a web bre ak and to help the threading of the web (W). A blow-down device (25) is arrange d in connection with the doctor (20) to produce a blow (PA) in order to preven t the web (W) form hitting the doctor (20) and to guide the web (W) past the doctor (20) in a controlled manner.
Description
= CA 02507274 2007-05-04 Doctor for a paper or board machine The present invention relates to paper and board machines and more specifically to a doctor for such machines.
A rotating roll, a drying cylinder or a reeling drum of a paper or board machine can be provided with a doctor. The purpose of the doctor is to prevent the web from wrapping around the roll or the cylinder/drum during a web break and to help tail threading. A
further purpose of the doctor is to keep the roll or cylinder surface clean.
There are two types of doctors regarding their operation principle: a contacting doctor in which the doctor blade of the doctor extending across the entire width of the roll or the cylinder is placed against the outer surface of the roll or the cylinder, or a non-contacting doctor in which the doctor blade of the doctor is at a small distance, usually at a distance of a few millimeters, from the outer surface of the roll or the cylinder, so that air is blown into a gap between the tip of the doctor blade of the doctor and the outer surface of the roll from the trailing side of the doctor blade of the doctor to prevent the web from travelling with the roll or the cylinder. The present invention relates to a contacting doctor, which is called a doctor in the following.
Among other things, the following drawbacks are associated with the contacting doctors known from the prior art: the grip of the doctor blade is not sufficient, the grip is uneven, to improve the grip it is necessary to increase pressure excessively, which causes that the moment of the cylinder or the roll need be increased. If the grip of the doctor blade does not suffice or is uneven, it may lead to the fact that the web gets between the-blade and the cylinder or the roll. This situation is non- desirable and a malfunction of the device.
The blade of the doctor may be broken when the web gets between the blade of the doctor and the cylinder or the roll.
M- 1 j_~~~ CA 02507274 2005-05-24 F10300971 la With respect to the prior art, reference can be made to document WO-A-00015$4 disclosing a doctor for a paper machine, which doctor is disposed in connection with a roll to keep the surface of the roll elean and which doctor comprises a doctor blade to prevent a web from being wrapped around the roll. The arrangement disclosed in this document uses needle jets to cause thc web to be disntpted.
In addition, with respect to the prior art, reference can be made to US
patents 5,735.060 and 6,145,217 disclosing doctor arrangements applied in a dryer section of a paper suachine in connection with the transfer of a thxeading strip of a web.
AMENDED SHEET
A rotating roll, a drying cylinder or a reeling drum of a paper or board machine can be provided with a doctor. The purpose of the doctor is to prevent the web from wrapping around the roll or the cylinder/drum during a web break and to help tail threading. A
further purpose of the doctor is to keep the roll or cylinder surface clean.
There are two types of doctors regarding their operation principle: a contacting doctor in which the doctor blade of the doctor extending across the entire width of the roll or the cylinder is placed against the outer surface of the roll or the cylinder, or a non-contacting doctor in which the doctor blade of the doctor is at a small distance, usually at a distance of a few millimeters, from the outer surface of the roll or the cylinder, so that air is blown into a gap between the tip of the doctor blade of the doctor and the outer surface of the roll from the trailing side of the doctor blade of the doctor to prevent the web from travelling with the roll or the cylinder. The present invention relates to a contacting doctor, which is called a doctor in the following.
Among other things, the following drawbacks are associated with the contacting doctors known from the prior art: the grip of the doctor blade is not sufficient, the grip is uneven, to improve the grip it is necessary to increase pressure excessively, which causes that the moment of the cylinder or the roll need be increased. If the grip of the doctor blade does not suffice or is uneven, it may lead to the fact that the web gets between the-blade and the cylinder or the roll. This situation is non- desirable and a malfunction of the device.
The blade of the doctor may be broken when the web gets between the blade of the doctor and the cylinder or the roll.
M- 1 j_~~~ CA 02507274 2005-05-24 F10300971 la With respect to the prior art, reference can be made to document WO-A-00015$4 disclosing a doctor for a paper machine, which doctor is disposed in connection with a roll to keep the surface of the roll elean and which doctor comprises a doctor blade to prevent a web from being wrapped around the roll. The arrangement disclosed in this document uses needle jets to cause thc web to be disntpted.
In addition, with respect to the prior art, reference can be made to US
patents 5,735.060 and 6,145,217 disclosing doctor arrangements applied in a dryer section of a paper suachine in connection with the transfer of a thxeading strip of a web.
AMENDED SHEET
Also, the web cannot be passed to the pulping of broke in a desired and controlled manner.
By the arrangements known from the prior art it is not possible to control the web running from a cylinder or the roll into a pulper or onto a broke conveyor.
Drawbacks of the arrangements known from the prior art are also that the contacting doctors wear, slow down the rotating cylinder and load the drive of the cylinder. In addition, as a result of wear, the doctors must be replaced regularly, which causes short breaks in production.
One problem in connection with the prior-art contacting doctor arrangements is also that when the web hits the doctor blade of the doctor, the web may deflect the blade backwards such that the blade doctors with the base of the worn blade, so that the tip of the blade opens and allows the web running along the cylinder surface to run between the blade and the cylinder, which causes the web to be guided around the cylinder, with the result that to deal with the situation, the web must be cut and the web must be conducted again past said point.
An object of the invention is to provide a doctor in which the problems and drawbacks of the arrangement known from the prior art are eliminated or at least minimized.
With a view to achieving the objects described above and those coming out later, the doctor for a paper or board machine according to the invention includes a blow-down device to produce a pull-down blow across substantially the entire width of the web.
In accordance with the invention, a blow-down device is arranged in connection with the contacting doctor for separating and pulling the web from the doctor using a downwardly directed air jet, and the air jet separates the web from the doctor surface and prevents the web from hitting the doctor blade of the doctor.
By the arrangements known from the prior art it is not possible to control the web running from a cylinder or the roll into a pulper or onto a broke conveyor.
Drawbacks of the arrangements known from the prior art are also that the contacting doctors wear, slow down the rotating cylinder and load the drive of the cylinder. In addition, as a result of wear, the doctors must be replaced regularly, which causes short breaks in production.
One problem in connection with the prior-art contacting doctor arrangements is also that when the web hits the doctor blade of the doctor, the web may deflect the blade backwards such that the blade doctors with the base of the worn blade, so that the tip of the blade opens and allows the web running along the cylinder surface to run between the blade and the cylinder, which causes the web to be guided around the cylinder, with the result that to deal with the situation, the web must be cut and the web must be conducted again past said point.
An object of the invention is to provide a doctor in which the problems and drawbacks of the arrangement known from the prior art are eliminated or at least minimized.
With a view to achieving the objects described above and those coming out later, the doctor for a paper or board machine according to the invention includes a blow-down device to produce a pull-down blow across substantially the entire width of the web.
In accordance with the invention, a blow-down device is arranged in connection with the contacting doctor for separating and pulling the web from the doctor using a downwardly directed air jet, and the air jet separates the web from the doctor surface and prevents the web from hitting the doctor blade of the doctor.
The pull-down blow in accordance with the invention is accomplished as extending substantially across the full width of the web.
In accordance witll the invention, the doctor thus comprises a pull-down blow function of substantially the width of the web, whose aim is to keep the web separated from the doctor and guide the web into a pulper or onto a broke conveyor.
By means of the pull-down blow of the web, the web is pulled out of contact with the cylinder or roll surface immediately after it has reached and passed the doctor blade, and the web is tightened between the cylinder surface and the nozzle of the web pull-down blow. The pull-down blow is used when the web is run from a cylinder or a roll into a pulper or onto a broke conveyor in order to obtain more reliability for controlled running down of broke, and the web is not able to get around the roll or the cylinder. The doctor itself is left with the responsibility for doctoring in the running down process only in the situation when the tail of the web runs past. Later, the doctor has only an assuring role together with pull-down blowing.
The blow-down device comprises a blow nozzle which is substantially as long as the maximum web width and the feed of air to the blow nozzle advantageously takes place both from the tending and from the driving side of the machine.
lii accordance with the invention, when the tail of the web passes the doctor and starts to run into the pulper or onto the broke conveyor, the tail of the web can be brought under control immediately by means of the pull-down blow, which pulls the tail of the web out of contact with the cylinder or roll surface and tightens it between the cylinder surface and the blow nozzle. By this means, the web is under control all the time when paper is run into the pulper or onto the broke conveyor.
In accordance witll the invention, the doctor thus comprises a pull-down blow function of substantially the width of the web, whose aim is to keep the web separated from the doctor and guide the web into a pulper or onto a broke conveyor.
By means of the pull-down blow of the web, the web is pulled out of contact with the cylinder or roll surface immediately after it has reached and passed the doctor blade, and the web is tightened between the cylinder surface and the nozzle of the web pull-down blow. The pull-down blow is used when the web is run from a cylinder or a roll into a pulper or onto a broke conveyor in order to obtain more reliability for controlled running down of broke, and the web is not able to get around the roll or the cylinder. The doctor itself is left with the responsibility for doctoring in the running down process only in the situation when the tail of the web runs past. Later, the doctor has only an assuring role together with pull-down blowing.
The blow-down device comprises a blow nozzle which is substantially as long as the maximum web width and the feed of air to the blow nozzle advantageously takes place both from the tending and from the driving side of the machine.
lii accordance with the invention, when the tail of the web passes the doctor and starts to run into the pulper or onto the broke conveyor, the tail of the web can be brought under control immediately by means of the pull-down blow, which pulls the tail of the web out of contact with the cylinder or roll surface and tightens it between the cylinder surface and the blow nozzle. By this means, the web is under control all the time when paper is run into the pulper or onto the broke conveyor.
In accordance with an advantageous additional feature, a slit nozzle is used as the blow-down nozzle. The pull-down blow with compressed air of about 7 bars and the nozzle slit is 1-6 mm, most appropriately 1.5-3 mm.
In accordance with another advantageous additional feature, a hole row nozzle is used as the blow-down nozzle, the diameter of whose holes is 0.5-8 mm, most appropriately 1-4 mm, and the distance of the holes from one another is 3-30 mm, most appropriately 5-20 mm.
In accordance with one advantageous additional feature of the invention, the blowing force can be profiled in the cross direction, i.e. in the width direction of the web.
Advantageously, the control devices of the doctor and the blow-down devices in accordance with the invention are connected with the break automatics of the paper or board machine, so that in case of a web break the blow function is automatically switched on and the timing of the doctor can be coupled, when desired, to the sequence of threading blows. The control device of the doctor and the control device of the blow-down device are coupled together and there is a temporal delay between the control of the doctor and that of the blow-down device. Moreover, the devices can be automatically switched off after a web break has been dealt with.
In accordance with the invention, using the pull-down blow produced by means of the device placed below the doctor, the run of the web can be brought under control when the web is passed down into the pulper, because the web running down during the pull-down blow is run directly into the pulper or onto the broke conveyor without any risk of it being allowed to ruri through the doctor.
The doctor in accordance with the invention is advantageously used in connection with a reeling drum, but it can also be applied on drying cylinders and at suitable locations of a press and also at other locations where the web is run down from a roll/cylinder. The doctor in accordance with the invention can be used up to a speed of at least 1200 m/min and even up to 2500 m/min.
In accordance with another advantageous additional feature, a hole row nozzle is used as the blow-down nozzle, the diameter of whose holes is 0.5-8 mm, most appropriately 1-4 mm, and the distance of the holes from one another is 3-30 mm, most appropriately 5-20 mm.
In accordance with one advantageous additional feature of the invention, the blowing force can be profiled in the cross direction, i.e. in the width direction of the web.
Advantageously, the control devices of the doctor and the blow-down devices in accordance with the invention are connected with the break automatics of the paper or board machine, so that in case of a web break the blow function is automatically switched on and the timing of the doctor can be coupled, when desired, to the sequence of threading blows. The control device of the doctor and the control device of the blow-down device are coupled together and there is a temporal delay between the control of the doctor and that of the blow-down device. Moreover, the devices can be automatically switched off after a web break has been dealt with.
In accordance with the invention, using the pull-down blow produced by means of the device placed below the doctor, the run of the web can be brought under control when the web is passed down into the pulper, because the web running down during the pull-down blow is run directly into the pulper or onto the broke conveyor without any risk of it being allowed to ruri through the doctor.
The doctor in accordance with the invention is advantageously used in connection with a reeling drum, but it can also be applied on drying cylinders and at suitable locations of a press and also at other locations where the web is run down from a roll/cylinder. The doctor in accordance with the invention can be used up to a speed of at least 1200 m/min and even up to 2500 m/min.
5 In the following, the invention will be described in greater detail with reference to the figures in the appended drawing, to the details of which the invention is, however, not by any means meant to be narrowly limited.
Figure 1 is a schematic view of a situation in accordance with the prior art, wherein the web is about to hit the doctor blade of a doctor.
Figure 2 is a schematic view of a situation in accordance with the prior art, wherein the doctor blade of the doctor separates the web from a cylinder.
Figure 3 is a schematic view of a situation in wliich, in accordance with the invention, the web is separated from the doctor blade of a doctor by pull-down blowing.
In Figs. 1-3 the same reference numerals are used of the parts that correspond to one another.
In Fig. 1, a doctor 20 is arranged in connection with a roll/cylinder/drum 10, and a web W is separated from the surface of the cylinder 10 by means of a doctor blade 21 of the doctor 20. The direction of rotation of the cylinder 10 is designated by the reference sign S. As shown in the figure, in the prior art arrangement, the web W is just hitting the doctor blade 21 of the doctor 20.
In tlie situation shown in Fig. 2, in the prior art applications after the s'ituation shown in Fig. 1, the web W is separated with the doctor blade 21 of the doctor from the surface of the cylinder 10. The web W separates from the surface of the cylinder 10 and begins to fold after the blade 21, dropping into a pulper.
After that, the web W hits the doctor blade 21 of the doctor 20 with a certain force and at a certain frequency, with the result that, after some time, the doctor blade 21 of the doctor 20 bends, which leads to the fact that the angle of the doctor blade 21 of the doctor 20, i.e. the angle between the blade 21 and the cylinder 10 changes, which in turn leads to the fact that the web W is able to run along the surface of the cylinder 10 and enter between the blade 21 and the cylinder 10, which causes that the web is guided around the cylinder 10, so that the web must be cut, the roll/cylinder/drum 10 must be cleared, possibly even stopped, and the web must be conducted again past said point. Stopping of large rotating inertial masses takes expensive production time unnecessarily, for example, 100-200 euros/min.
Fig. 3 shows an arrangement in accordance with the invention, in which a device 25 is arranged in connection with the doctor 20 for a pull-down blow PA, by which the run of the web W is guided directly down towards a pulper such that the web W does not hit the doctor 20 nor the doctor blade 21 but stays apart and is guided into the pulper.
A control device 31 of the doctor 20 and a control device 32 of the blow-down device 25 are most appropriately coupled together and to a break and tail threading control system 30 of the paper or board machine, so that it can be arranged to operate automatically in case of a break and/or taking account of the threading phases. In the controls 31, 32 of the doctor 20 and the blow-down device 25 there is a temporal delay and both also possibly comprise a temporal duration.
A nozzle slit 26 of the blow-down device 25 is most appropriately a slit nozzle that extends across the entire width of the web and the blow slit is 1-6 mm.
The blow-down device 25 produces the pull-down blow PA, in which connection the air current needed by it is pressurized and the pressure is most appropriately bars.
Figure 1 is a schematic view of a situation in accordance with the prior art, wherein the web is about to hit the doctor blade of a doctor.
Figure 2 is a schematic view of a situation in accordance with the prior art, wherein the doctor blade of the doctor separates the web from a cylinder.
Figure 3 is a schematic view of a situation in wliich, in accordance with the invention, the web is separated from the doctor blade of a doctor by pull-down blowing.
In Figs. 1-3 the same reference numerals are used of the parts that correspond to one another.
In Fig. 1, a doctor 20 is arranged in connection with a roll/cylinder/drum 10, and a web W is separated from the surface of the cylinder 10 by means of a doctor blade 21 of the doctor 20. The direction of rotation of the cylinder 10 is designated by the reference sign S. As shown in the figure, in the prior art arrangement, the web W is just hitting the doctor blade 21 of the doctor 20.
In tlie situation shown in Fig. 2, in the prior art applications after the s'ituation shown in Fig. 1, the web W is separated with the doctor blade 21 of the doctor from the surface of the cylinder 10. The web W separates from the surface of the cylinder 10 and begins to fold after the blade 21, dropping into a pulper.
After that, the web W hits the doctor blade 21 of the doctor 20 with a certain force and at a certain frequency, with the result that, after some time, the doctor blade 21 of the doctor 20 bends, which leads to the fact that the angle of the doctor blade 21 of the doctor 20, i.e. the angle between the blade 21 and the cylinder 10 changes, which in turn leads to the fact that the web W is able to run along the surface of the cylinder 10 and enter between the blade 21 and the cylinder 10, which causes that the web is guided around the cylinder 10, so that the web must be cut, the roll/cylinder/drum 10 must be cleared, possibly even stopped, and the web must be conducted again past said point. Stopping of large rotating inertial masses takes expensive production time unnecessarily, for example, 100-200 euros/min.
Fig. 3 shows an arrangement in accordance with the invention, in which a device 25 is arranged in connection with the doctor 20 for a pull-down blow PA, by which the run of the web W is guided directly down towards a pulper such that the web W does not hit the doctor 20 nor the doctor blade 21 but stays apart and is guided into the pulper.
A control device 31 of the doctor 20 and a control device 32 of the blow-down device 25 are most appropriately coupled together and to a break and tail threading control system 30 of the paper or board machine, so that it can be arranged to operate automatically in case of a break and/or taking account of the threading phases. In the controls 31, 32 of the doctor 20 and the blow-down device 25 there is a temporal delay and both also possibly comprise a temporal duration.
A nozzle slit 26 of the blow-down device 25 is most appropriately a slit nozzle that extends across the entire width of the web and the blow slit is 1-6 mm.
The blow-down device 25 produces the pull-down blow PA, in which connection the air current needed by it is pressurized and the pressure is most appropriately bars.
Above, the invention has been described only with reference to one of its advantageous exemplifying embodiments, but the invention is not in any way meant to be narrowly limited to the details of it.
Claims (11)
1. A doctor for a paper or board machine, which doctor is disposed in connection with a roll, cylinder or drum of the paper or board machine to keep the surface of the roll or the cylinder or drum clean, which doctor includes a doctor blade of the doctor to prevent a web from wrapping around the roll, cylinder or drum during a web break and to help the threading of the web, in which doctor a blow-down device is arranged in connection with the doctor to produce a blow in order to prevent the web from hitting the doctor and to guide the web past the doctor in a controlled manner, wherein the blow-down device has a blow nozzle which is either a slit nozzle or a hole row nozzle whereby the blow-down device is arranged to produce a pull-down blow extending substantially across the entire width of the web.
2. The doctor as claimed in claim 1, wherein the blow-down device is arranged to produce a pull-down blow having an air pressure of 5 to 7 bars.
3. The doctor as claimed in claim 1 or 2, wherein the slit nozzle of the blow-down device has a slit of 1 to 12 mm.
4. The doctor of claim 3, wherein the slit is 2 to 10 mm.
5. The doctor as claimed in claim 1 or 2, wherein in the hole row nozzle of the blow-down device, the diameter of the holes is 0.5 to 8 mm, and the distance of the holes from one another is 3 to 30 mm.
6. The doctor of claim 5, wherein the diameter of the holes is 1 to 4 mm and the distance between the holes is 5 to 20 mm.
7. The doctor as claimed in any one of claims 1 to 6, wherein a control device of the doctor and a control device of the blow-down device are coupled to a break and tail threading control system of the paper and board machine to operate automatically in break situations and taking account of the threading of the web.
8. The doctor as claimed in claim 6, wherein the control devices of the doctor and the blow-down device are coupled together.
9. The doctor as claimed in claim 7, wherein the control devices provide a temporal delay between the doctor and the blow-down device.
10. The doctor as claimed in claim 7 or 8, wherein the control devices provide a temporal duration between the doctor and the blow-down device.
11. The doctor as claimed in any one of claims 1 to 9, herein the blow produced by the blow-down device can be profiled in the cross direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20022247A FI115310B (en) | 2002-12-20 | 2002-12-20 | Creator for a paper or cardboard machine |
| FI20022247 | 2002-12-20 | ||
| PCT/FI2003/000971 WO2004057106A1 (en) | 2002-12-20 | 2003-12-18 | Doctor for a paper or board machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2507274A1 CA2507274A1 (en) | 2004-07-08 |
| CA2507274C true CA2507274C (en) | 2008-06-03 |
Family
ID=8565120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002507274A Expired - Fee Related CA2507274C (en) | 2002-12-20 | 2003-12-18 | Doctor for a paper or board machine |
Country Status (5)
| Country | Link |
|---|---|
| AU (1) | AU2003292271A1 (en) |
| CA (1) | CA2507274C (en) |
| DE (1) | DE10393876T5 (en) |
| FI (1) | FI115310B (en) |
| WO (1) | WO2004057106A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI122377B (en) * | 2009-06-04 | 2011-12-30 | Metso Paper Inc | Device for moving web-shaped material in a fiber web machine and fiber web machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3941242A1 (en) * | 1989-12-14 | 1991-06-20 | Voith Gmbh J M | Guide plate for threading strip into paper machine - has guiding surface parallel to strip path and inlets for air to feed grooves in guide plate surface |
| US5600897A (en) | 1993-08-06 | 1997-02-11 | J.M. Voith Gmbh | Mixed dryer section including single-tier and double-tier drying groups with automatic ropeless threading |
| DE19726895A1 (en) | 1997-06-25 | 1999-01-07 | Voith Sulzer Papiermasch Gmbh | Machine for the production of a material web |
| FI104646B (en) | 1998-07-03 | 2000-03-15 | Valmet Corp | Device and method for conducting a paper / cardboard web to a pulp solver |
| DE10024296B4 (en) * | 2000-05-17 | 2008-11-20 | Voith Patent Gmbh | Machine for producing a material web |
-
2002
- 2002-12-20 FI FI20022247A patent/FI115310B/en not_active IP Right Cessation
-
2003
- 2003-12-18 WO PCT/FI2003/000971 patent/WO2004057106A1/en not_active Application Discontinuation
- 2003-12-18 AU AU2003292271A patent/AU2003292271A1/en not_active Abandoned
- 2003-12-18 DE DE10393876T patent/DE10393876T5/en not_active Withdrawn
- 2003-12-18 CA CA002507274A patent/CA2507274C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FI115310B (en) | 2005-04-15 |
| FI20022247A0 (en) | 2002-12-20 |
| WO2004057106A1 (en) | 2004-07-08 |
| DE10393876T5 (en) | 2012-02-16 |
| AU2003292271A1 (en) | 2004-07-14 |
| CA2507274A1 (en) | 2004-07-08 |
| FI20022247A (en) | 2004-06-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20121218 |