EP1111126A2 - Pressenpartie - Google Patents
Pressenpartie Download PDFInfo
- Publication number
- EP1111126A2 EP1111126A2 EP00123972A EP00123972A EP1111126A2 EP 1111126 A2 EP1111126 A2 EP 1111126A2 EP 00123972 A EP00123972 A EP 00123972A EP 00123972 A EP00123972 A EP 00123972A EP 1111126 A2 EP1111126 A2 EP 1111126A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- shoe
- section according
- counter
- equal
- 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.)
- Granted
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/04—Arrangements thereof
- D21F3/045—Arrangements thereof including at least one extended press nip
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/14—Making cellulose wadding, filter or blotting paper
Definitions
- the invention relates to a press section of a machine for production of tissue webs with a shoe press unit and a counter roller comprehensive shoe press, the shoe press unit at least two Press shoes and a flexible, liquid-tight guided over these press shoes Press belt has.
- press shoes are one by one Press plane parallel axis pivotable, and they can be in the Distinguish the radius of curvature. This ensures that for the whole Thickness spectrum of the types of paper produced on a paper machine optimal press work done, i.e. the highest possible dry content can be achieved.
- the aim of the invention is to provide a press section of the type mentioned to create, which enables a more economical production of tissue while ensuring better product quality.
- the two Press shoes have different lengths measured in the direction of web travel and each between a rest position and a pressing position are shiftable, in which the respective press shoe is opposite the counter roller.
- Tissue products have different quality requirements depending on their use posed. So there are products for which the specific Volume (“Bulk”) is a crucial quality characteristic. With others Products may be more important for economic reasons, a little lower specific volume in favor of a high dry content, i.e. high production. Because of the invention Training is now possible in tissue production to switch between these varieties without this regarding the Machine or press setting a compromise must, as has been the case up to now. The optimum can now be found in each case Realize situation.
- Bulk specific Volume
- a shoe press unit is preferably a shoe press roll with a provided the press belt forming press jacket.
- At least one press shoe is provided, its in the web running direction measured length greater than 80 mm, ⁇ 100 mm, preferably ⁇ 120 mm is.
- the maximum pressing pressure is in a press nip between the press shoe and the counter roll in the web running direction Pressure course preferably less than or equal to a value of about 2.5 MPa selected, in particular ⁇ 2 MPa, preferably ⁇ 1.5 MPa.
- At least one press shoe is provided whose length measured in the direction of web travel is less than or equal to 60 mm and in particular less than or equal to 50 mm and preferably one Has a value in the range of about 37 mm.
- the maximum is Pressing pressure in a nip between the press shoe and the Counter roll in the web running direction resulting pressure course at a Shoe length less than or equal to 60 mm, preferably greater than or equal to one Value of 3.3 MPa, with a shoe length less than or equal to 50 mm preferably greater than or equal to a value of 4.3 MPa and at one Shoe length in the range of about 37 mm is preferably equal to a value selected in the range of about 4.8 MPa.
- a heated drying cylinder serves as the counter roller and in particular a so-called Yankee cylinder is provided is that in the event that the shoe press unit by a Shoe press roll is formed, a much larger diameter than the shoe press roller has.
- the maximum line force is due to inadmissibly large deformations and tensions of the Yankee cylinder often to a value of about 90 kN / m to 120 limited kN / m. This again limits the maximum pressure for one long press shoe designed for high bulk and thus the one for the tissue web maximum achievable dryness. The result is a reduction the machine speed and a higher drying effort on the drying cylinder. By using a Shoe press with at least two different press shoes avoided this disadvantage.
- a further increase in the dry matter content can be achieved that one between the shoe press unit and the counter roller, preferably a drying cylinder, formed felted press nip Angle between that applied to the counter roll at the end of the press nip Tangent and at least one running out of the press nip Felt advantageously ⁇ 10 °, in particular ⁇ 15 °, in particular ⁇ 18 ° and is preferably ⁇ 20 °.
- Press belt have a circumferentially grooved surface that leads to a contributes to an additional increase in dryness.
- a grooved press belt is therefore preferred when tissue types are used with the tissue machine are produced in which it is mainly due to high dryness arrives.
- Figures 1 and 2 each show a machine in a schematic representation for producing a tissue web 10 (see also FIG. 3), the Press section includes a shoe press 12, one here by a Shoe press roll 14 formed shoe press unit and a counter roll which, in the case of the embodiments according to the figures 1 and 3 around a drying cylinder 16 and in the embodiment 2 is a conventional counter roll 18.
- the shoe press rolls 14 each have two opposite one another Press shoes 20, 20 'and a guide over these press shoes 20, 20', formed by a flexible, liquid-tight press belt 22 on.
- the two press shoes 20, 20 ' have a respective shoe press roll 14 different lengths l, l 'measured in the web running direction L (cf. in particular Figure 3). They are also between a rest position R and a press position P, in which the respective press shoe 20, 20 'of the counter roller 16, 18 is opposite.
- the longer press shoe 20 can, for example, be one in the web running direction L have measured length 1 greater than 80 mm. If the relevant press nip between such a press shoe 20 and the counter roller 16, 18th formed, so the maximum pressing pressure resulting in the press nip Pressure curve in particular less than or equal to a value of approximately 2.5 MPa should be selected. In this case, a high specific volume can be achieved.
- the maximum pressing pressure is in one Press nip between this press shoe 20 'and the counter roll 16, 18 in Web running direction L resulting pressure curve with a shoe length smaller or equal to 60 mm advantageously greater than or equal to a value of about 3.3 MPa, preferably for a shoe length less than or equal to 50 mm greater than or equal to a value of approximately 4.3 MPa and at one Shoe length in the range of about 37 mm is preferably equal to a value selected in the range of about 4.8 MPa. In such a case, a relative high dryness can be achieved.
- a heated drying cylinder 16 and in particular, a so-called Yankee cylinder can be provided, the Diameter much larger than the diameter of the shoe press roll 14 is.
- FIG. 1 In the embodiment of Figure 1 is by the between the Shoe press roll 14 and this drying cylinder 16 formed press nip a felt 24 is fed to the press nip via a suction roll 26 becomes.
- the felt 24 spans together with a sheet forming screen 28 a forming roller 30, in the area of which a headbox 32 is provided.
- the one formed in particular by a drying cylinder or Yankee cylinder Counter roller 16 is assigned a scraper 34 through which the tissue web 10 is scraped off after drying.
- the counter roller 18 is passed through formed a normal roller.
- a top felt 36 and a Bottom felt 38 out are a top felt 36 and a Bottom felt 38 out.
- the tissue web to be formed is through the upper felt 36 taken from a sieve 42 coming from the wire section 40 and fed to the shoe press 12. Following this is the tissue web fed through the same top felt 36 to a drying cylinder 44.
- the angle ⁇ can be between that at the end of the felted press nip of the shoe press 12 to the counter roller, here the Drying cylinder or Yankee cylinder 16, applied tangent 46 and the felt 48 running out of the press nip, in particular ⁇ 20 °.
- the Press jacket 22 of the shoe press 14 preferably has in this case a circumferentially grooved surface.
- the press belt 22 can in particular be blind-drilled and / or be grooved.
- the two press shoes 20, 20 'can e.g. on a gunslinger 50 or the like can be provided and jointly adjustable via this (see in particular Figures 2 and 3).
Landscapes
- Paper (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Valve Device For Special Equipments (AREA)
- Resistance Heating (AREA)
Abstract
Description
- Figur 1
- eine schematische Darstellung einer ersten Ausführungsform einer Maschine zur Herstellung einer Tissuebahn mit einer eine Schuhpresse umfassenden Pressenpartie,
- Figur 2
- eine schematische Darstellung einer weiteren Ausführungsform einer solchen der Herstellung einer Tissuebahn dienenden Maschine und
- Figur 3
- eine vergrößerte schematische Teildarstellung einer in einer solchen Tissuemaschine einsetzbaren Schuhpresse.
- 10
- Tissuebahn
- 12
- Schuhpresse
- 14
- Schuhpreßeinheit, Schuhpreßwalze
- 16
- Gegenwalze, Trockenzylinder, Yankee-Zylinder
- 18
- Gegenwalze
- 20
- Preßschuh
- 20'
- Preßschuh
- 22
- Preßband, Preßmantel
- 24
- Filz
- 26
- Saugwalze
- 28
- Blattbildungssieb
- 30
- Formierwalze
- 32
- Stoffauflauf
- 34
- Schaber
- 36
- Oberfilz
- 38
- Unterfilz
- 40
- Siebpartie
- 42
- Sieb
- 44
- Trockenzylinder
- 46
- Tangente
- 48
- Filz
- 50
- Revolverträger
- L
- Bahnlaufrichtung
- P
- Preßposition
- R
- Ruheposition
- l
- Schuhlänge
- l'
- Schuhlänge
Claims (12)
- Pressenpartie einer Maschine zur Herstellung von Tissuebahnen (10) mit einer eine Schuhpreßeinheit (14) und eine Gegenwalze (16, 18) umfassenden Schuhpresse (12), deren Schuhpreßeinheit (14) wenigstens zwei Preßschuhe (20, 20') und ein über diese Preßschuhe (20, 20') geführtes flexibles, flüssigkeitsdichtes Preßband (22) aufweist,
dadurch gekennzeichnet,
daß die beiden Preßschuhe (20, 20') unterschiedliche in Bahnlaufrichtung (L) gemessene Längen (l, l') besitzen und jeweils zwischen einer Ruheposition (R) und einer Preßposition (P) verlagerbar sind, in der der jeweilige Preßschuh (20, 20') der Gegenwalze (16, 18) gegenüberliegt. - Pressenpartie nach Anspruch 1,
dadurch gekennzeichnet,
daß als Schuhpreßeinheit eine Schuhpreßwalze (14) mit einem das Preßband bildenden Preßmantel (22) vorgesehen. - Pressenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß wenigstens ein Preßschuh (20) vorgesehen ist, dessen in Bahnlaufrichtung (L) gemessene Länge (l) größer als 80 mm ist. - Pressenpartie nach Anspruch 3,
dadurch gekennzeichnet,
daß der maximale Preßdruck des sich in einem Preßspalt zwischen dem Preßschuh (20) und der Gegenwalze (16, 18) in Bahnlaufrichtung (L) ergebenden Druckverlaufs kleiner oder gleich einem Wert von etwa 2,5 MPa gewählt ist. - Pressenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß wenigstens ein Preßschuh (20') vorgesehen ist, dessen in Bahnlaufrichtung (L) gemessene Länge (I') kleiner oder gleich 60 mm und insbesondere kleiner oder gleich 50 mm ist und vorzugsweise einen Wert im Bereich von etwa 37 mm besitzt. - Pressenpartie nach Anspruch 5,
dadurch gekennzeichnet,
daß bei einer Schuhlänge (l') kleiner oder gleich 60 mm der maximale Preßdruck des sich in einem Preßspalt zwischen dem Preßschuh (20') und der Gegenwalze (16, 18) in Bahnlaufrichtung (L) ergebenden Druckverlaufs größer oder gleich einem Wert von etwa 3,3 MPa gewählt ist. - Pressenpartie nach Anspruch 5,
dadurch gekennzeichnet,
daß bei einer Schuhlänge (l') kleiner oder gleich 50 mm der maximale Preßdruck des sich in einem Preßspalt zwischen dem Preßschuh (20') und der Gegenwalze (16, 18) in Bahnlaufrichtung (L) ergebenden Druckverlaufs größer oder gleich einem Wert von etwa 4,3 MPa gewählt ist. - Pressenpartie nach Anspruch 5,
dadurch gekennzeichnet,
daß bei einer Schuhlänge (l') im Bereich von etwa 37 mm der maximale Preßdruck des sich in einem Preßspalt zwischen dem Preßschuh (20') und der Gegenwalze (16, 18) in Bahnlaufrichtung (L) ergebenden Druckverlaufs gleich einem Wert im Bereich von etwa 4,8 MPa gewählt ist. - Pressenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß als Gegenwalze ein beheizbarer Trockenzylinder (16) und insbesondere ein sogenannter Yankee-Zylinder vorgesehen ist. - Pressenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der zwischen der Schuhpreßeinheit (14) und der Gegenwalze (16, 18), vorzugsweise einem Trockenzylinder (16), gebildete Preßspalt befilzt ist und daß der Winkel (α) zwischen der am Ende des Preßspaltes an die Gegenwalze (16, 18) angelegten Tangente (46) und wenigstens einem aus dem Preßspalt auslaufenden Filz (48) ≥ 10°, insbesondere ≥ 15°, insbesondere ≥ 18° und vorzugsweise ≥ 20° ist. - Pressenpartie nach Anspruch 10,
dadurch gekennzeichnet,
daß das Preßband (22) eine in Umfangsrichtung gerillte Oberfläche besitzt. - Pressenpartie nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß das Preßband (22) blindgebohrt und/oder gerillt ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19962706 | 1999-12-23 | ||
DE19962706A DE19962706A1 (de) | 1999-12-23 | 1999-12-23 | Pressenpartie |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1111126A2 true EP1111126A2 (de) | 2001-06-27 |
EP1111126A3 EP1111126A3 (de) | 2001-08-16 |
EP1111126B1 EP1111126B1 (de) | 2004-12-08 |
Family
ID=7934296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00123972A Expired - Lifetime EP1111126B1 (de) | 1999-12-23 | 2000-11-03 | Pressenpartie |
Country Status (7)
Country | Link |
---|---|
US (1) | US6514385B2 (de) |
EP (1) | EP1111126B1 (de) |
AT (1) | ATE284465T1 (de) |
BR (1) | BRPI0006405A2 (de) |
CA (1) | CA2329497C (de) |
DE (2) | DE19962706A1 (de) |
PL (1) | PL196245B1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10129613A1 (de) * | 2001-06-20 | 2003-01-02 | Voith Paper Patent Gmbh | Verfahren und Vorrichtung zur Herstellung einer mit einer dreidimensionalen Oberflächenstruktur versehenen Faserstoffbahn |
DE10158717A1 (de) * | 2001-11-29 | 2003-06-12 | Voith Paper Patent Gmbh | Presswalze |
DE10233920A1 (de) * | 2002-07-25 | 2004-02-12 | Voith Paper Patent Gmbh | Schuhpresse |
DE10326304A1 (de) * | 2003-06-11 | 2005-02-03 | Voith Fabrics Patent Gmbh | Verfahren und Vorrichtung zur Herstellung einer Tissuebahn |
US7297233B2 (en) * | 2004-01-30 | 2007-11-20 | Voith Paper Patent Gmbh | Dewatering apparatus in a paper machine |
SE529130C2 (sv) * | 2004-05-26 | 2007-05-08 | Metso Paper Karlstad Ab | Pappersmaskin för framställning av mjukpapper, metod för framställning av mjukpapper samt mjukpapper |
DE102004048156A1 (de) * | 2004-10-02 | 2006-04-06 | Voith Paper Patent Gmbh | Pressvorrichtung in einer Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn |
AT505760B1 (de) * | 2008-01-09 | 2009-04-15 | Andritz Ag Maschf | Vorrichtung und verfahren zur entwasserung einer materialbahn |
AT508331B1 (de) * | 2009-05-19 | 2011-05-15 | Andritz Ag Maschf | Verfahren und vorrichtung zur behandlung einer faserstoffbahn in einer langnip-presseinheit |
JP5716378B2 (ja) * | 2010-12-17 | 2015-05-13 | 王子ホールディングス株式会社 | 繊維シートの製造装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3205664A1 (de) * | 1982-02-17 | 1983-08-25 | J.M. Voith Gmbh, 7920 Heidenheim | Presse zur entwaesserung nasser faserstoffbahnen |
EP0549553A1 (de) * | 1991-12-23 | 1993-06-30 | Valmet Corporation | Presspartie einer Papiermaschine, insbesondere zum Bedrucken von geeignetem Papier |
EP0926296A2 (de) * | 1997-12-18 | 1999-06-30 | Voith Sulzer Papiertechnik Patent GmbH | Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Tissue-Papierbahn |
US6004429A (en) * | 1996-12-23 | 1999-12-21 | Voith Sulzer Papiermaschinen Gmbh | Machine and method for producing a fibrous creped web |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3317456C2 (de) * | 1983-04-02 | 1993-12-02 | Voith Gmbh J M | Bandpreßeinheit zum Entwässern von Faserstoffbahnen |
DE3503819A1 (de) * | 1984-12-21 | 1986-06-26 | Sulzer-Escher Wyss GmbH, 7980 Ravensburg | Hydraulischer pressschuh sowie dessen verwendung und betrieb |
US5639351A (en) | 1991-12-23 | 1997-06-17 | Valmet Corporation | Press section of a paper machine, in particular for printing paper qualities |
DE4301750C2 (de) * | 1993-01-23 | 1996-10-10 | Voith Gmbh J M | Verfahren und Vorrichtung zum Entwässern einer Bahn mittels Pressen |
DE19652018A1 (de) * | 1996-12-13 | 1998-06-18 | Voith Sulzer Papiermasch Gmbh | Pressenpartie |
-
1999
- 1999-12-23 DE DE19962706A patent/DE19962706A1/de not_active Withdrawn
-
2000
- 2000-11-03 DE DE2000508900 patent/DE50008900D1/de not_active Expired - Lifetime
- 2000-11-03 AT AT00123972T patent/ATE284465T1/de not_active IP Right Cessation
- 2000-11-03 EP EP00123972A patent/EP1111126B1/de not_active Expired - Lifetime
- 2000-12-08 BR BRPI0006405A patent/BRPI0006405A2/pt unknown
- 2000-12-21 PL PL344740A patent/PL196245B1/pl not_active IP Right Cessation
- 2000-12-22 US US09/742,002 patent/US6514385B2/en not_active Expired - Fee Related
- 2000-12-22 CA CA002329497A patent/CA2329497C/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3205664A1 (de) * | 1982-02-17 | 1983-08-25 | J.M. Voith Gmbh, 7920 Heidenheim | Presse zur entwaesserung nasser faserstoffbahnen |
EP0549553A1 (de) * | 1991-12-23 | 1993-06-30 | Valmet Corporation | Presspartie einer Papiermaschine, insbesondere zum Bedrucken von geeignetem Papier |
US6004429A (en) * | 1996-12-23 | 1999-12-21 | Voith Sulzer Papiermaschinen Gmbh | Machine and method for producing a fibrous creped web |
EP0926296A2 (de) * | 1997-12-18 | 1999-06-30 | Voith Sulzer Papiertechnik Patent GmbH | Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Tissue-Papierbahn |
Also Published As
Publication number | Publication date |
---|---|
DE50008900D1 (de) | 2005-01-13 |
PL196245B1 (pl) | 2007-12-31 |
CA2329497A1 (en) | 2001-06-23 |
DE19962706A1 (de) | 2001-06-28 |
ATE284465T1 (de) | 2004-12-15 |
EP1111126B1 (de) | 2004-12-08 |
US20020096302A1 (en) | 2002-07-25 |
EP1111126A3 (de) | 2001-08-16 |
PL344740A1 (en) | 2001-07-02 |
BRPI0006405A2 (pt) | 2017-01-17 |
CA2329497C (en) | 2009-02-10 |
US6514385B2 (en) | 2003-02-04 |
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