WO2001059438A1 - Procede et appareil destines a mesurer la temperature d'une bande de papier - Google Patents

Procede et appareil destines a mesurer la temperature d'une bande de papier Download PDF

Info

Publication number
WO2001059438A1
WO2001059438A1 PCT/FI2001/000122 FI0100122W WO0159438A1 WO 2001059438 A1 WO2001059438 A1 WO 2001059438A1 FI 0100122 W FI0100122 W FI 0100122W WO 0159438 A1 WO0159438 A1 WO 0159438A1
Authority
WO
WIPO (PCT)
Prior art keywords
paper web
radiation
temperature
arrangement
measured
Prior art date
Application number
PCT/FI2001/000122
Other languages
English (en)
Inventor
Markku MÄNTYLÄ
Original Assignee
Metso Paper Automation Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metso Paper Automation Oy filed Critical Metso Paper Automation Oy
Priority to AU2001235519A priority Critical patent/AU2001235519A1/en
Publication of WO2001059438A1 publication Critical patent/WO2001059438A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0803—Arrangements for time-dependent attenuation of radiation signals
    • G01J5/0805—Means for chopping radiation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/60—Radiation pyrometry, e.g. infrared or optical thermometry using determination of colour temperature
    • G01J5/602—Radiation pyrometry, e.g. infrared or optical thermometry using determination of colour temperature using selective, monochromatic or bandpass filtering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00

Definitions

  • the invention relates to measuring a paper or board web created during the paper and board making process.
  • the invention relates especially to measuring temperature by means of IR radiation.
  • Measuring the temperature of a paper web is important, because an incorrect temperature at some stage of the process leads to a deterioration of the paper or board quality, and makes controlling the process difficult. Temperature measurement is needed when optimising many sub- processes of the paper web production process, such as web drying and- power usage during drying, solidification of coating paste, and measuring the temperature profile of the web.
  • a paper web is measured according to prior art with a separate temperature measuring arrangement which comprises one or more separate sensors and sensor processing blocks.
  • the sensor is typically sensitive to IR (infrared) radiation, wherefore the electric resistance of the sensor changes in a known manner according to a change in the temperature.
  • the temperature sensor is, as a separate measuring apparatus, either fixed close to the paper web or it can move back and forth over it, in which case the entire area of the paper web can be measured.
  • the sensor typically measures the temperature continuously. The measuring information is processed and utilised in the paper-making process.
  • the invention also relates to an arrangement for measuring the temperature of a paper web.
  • the arrangement of the invention is characterized in that when measuring one property of the paper web optically by illuminating the surface of the paper web by pulsed optical radiation, the arrangement is, in connection with said measuring, arranged to measure the strength of the IR radiation emitted by the paper web itself on at least one time instant between optical radiation pulses when optical radiation is not directed to the paper web, and to determine the temperature of the paper web by means of the measured strength of the IR radiation.
  • the method and system of the invention provide several advantages.
  • the measuring arrangement of the paper web temperature according to the invention makes it possible to monitor the temperature of the paper web while the paper or board is being measured by pulsed optical radiation.
  • a common measuring apparatus structure reduces the number of required apparatuses, which reduces both the complexity and price of the equipment, requires less space and reduces failure probability.
  • it is easier to protect the measuring equipment from the environment, since separate protection is not needed.
  • Data transmission between the apparatuses is also easier.
  • the paper web can be controlled to make the paper shrinkage even, which reduces folding and allows a high production rate.
  • Figure 1A is a block diagram of an apparatus using one detector
  • Figure 1 B is a block diagram of an apparatus using two detectors
  • Figure 2 shows a chopper disc
  • Figures 3A to 3E show the timing of optical rays chopped with the chopper, [0014] Figure 4A shows impinged blowing used in the drying section of a paper machine,
  • Figure 4B shows through-air-blowing used in the drying section of a paper machine
  • Figure 5 shows heat-profile measuring and drying control.
  • the solution of the invention is especially suited for measuring the temperature of a paper web.
  • the NIR (near IR) range of IR (infrared) radiation refers to an electromagnetic spectrum band of 700 nm to 2500 nm.
  • the MIR (middle IR) range refers to an electromagnetic spectrum band of 2500 nm to 20,000 nm.
  • coating measurement for which the solution of the invention is especially suited, without being limited to it, however.
  • one or more coating components such as calcium carbonate, kaolin, silicone and water
  • one or more components such as kaolin, talcum, gypsum, silicone, water, cellulose and binding agents, such as latex, are measured with NIR radiation.
  • Coating measurement can be performed by one or two detectors in one or more sensors.
  • the measurement is made using both MIR and NIR radiation, which are measured at different times. The detector is then an MCT (mercury cadmium telluride) detector or the like.
  • the type of the detector is, however, not essential for the invention, but the essential matter is that the detector is capable of detecting the radiation being measured.
  • the method directs IR radiation which is chopped into light pulses by a chopper towards the coating from an optical power source.
  • IR radiation reflected from the coating is chopped synchronously with the IR radiation illuminating the coating, the former radiation comprising both pulsed optical radiation originating from the optical power source and the optical radiation emitted by the coating itself. Detection is done in the measurement direction which is other than the specular reflection direction.
  • At least one wavelength band of at least one component is band-pass-filtered, which wavelength is sensitive to the absorption of said at least one component in the MIR range, and the strength of the MIR radiation sensitive to absorption is measured.
  • the strength of the radiation is measured as output or intensity, as is obvious to a person skilled in the art.
  • the point of MIR radiation sensitive to absorption is the maximum absorption point of the component in question. With calcium carbonate, this absorption occurs on an optical band having an average wavelength of approximately 3950 nm. With kaolin, the average wavelength of absorption is approximately 2700 nm.
  • An interference filter is used as the band-pass filter.
  • At least one absorption strength/level in proximity to the maximum absorption is measured to find out how strong the maximum absorption is in comparison to its environment. This is done as follows. From the chopped IR radiation, one wavelength band of said at least one component is band-pass- filtered, which wavelength is insensitive to the absorption of said one component in the MIR range, and the strength of the MIR radiation insensitive to absorption is measured. After this, the absorption strength/level of one or more components is defined by comparing for each component specifically the strength of the absorption-sensitive MIR radiation with the strength of the absorption-insensitive MIR radiation. At the end of the MIR measurement, the amount of at least one component of the coating is defined using the MIR absorption strength/level.
  • a wavelength band of at least one other component is band-pass-filtered, which wavelength is sensitive to the absorption of said at least one other component in the NIR range, and the strength of the NIR radiation sensitive to absorption is measured.
  • absorption is also measured on a reference wavelength which is other than that causing the maximum absorption.
  • a wavelength band of said at least one other component is then band-pass-filtered, which wavelength is insensitive to the absorption of said at least one other component in the NIR range, and the strength of the NIR radiation insensitive to absorption is measured.
  • the absorption strength/level of said one or more other components is measured by comparing for each component specifically the strength of the absorption- sensitive NIR radiation with the strength of the absorption-insensitive NIR radiation. Finally, the amount of said at least one other component of the coating is defined using the NIR absorption strength/level.
  • NIR radiation can be detected with an InGaAs (indium gallium arsenide) detector, for instance.
  • InGaAs indium gallium arsenide
  • An optical radiation source 100 operating in at least the IR range transmits optical radiation through a chopper 102 to a measurement object 105.
  • the measurement object 105 is paper or board on a paper web, the coating 104 of which will be measured.
  • the paper web 103 is formed by the paper or board being measured 105 and a possible coating 104.
  • the inventive solution measures the number of components in the coating.
  • the chopper 102 allows optical radiation to momentarily pass through it and part of the time the chopper 102 prevents the optical radiation from passing through it.
  • the essential thing in the operation of the chopper 102 for measuring coating is thus that during the illumination time, the measurement object 105 is illuminated by IR radiation emitted by the optical power source 100 and at other times, the object being measured is not illuminated by IR radiation emitted by the optical power source 100.
  • the chopper 102 chops the optical radiation into light pulses which hit the object 104 being measured. From the object 104 being measured, the optical radiation is reflected and scattered into different directions. A part of the optical radiation is reflected towards block 106, in which the optical radiation is filtered and chopped for detection.
  • the optical radiation reflected from the measurement object 104 is, however, not measured from the direction of the specular reflection.
  • filtering is done separately with MIR and NIR filters which are preferably interference filters.
  • MIR and NIR filters which are preferably interference filters.
  • MIR and NIR filters which are preferably interference filters.
  • MIR and NIR filters which are preferably interference filters.
  • the detection time of coating measurement is the time when MIR or NIR radiation is allowed to pass to a detector 108 for measurement.
  • detection is performed synchronously at the same time as the object being measured is illuminated with optical radiation.
  • the solution of the invention measures the temperature of the paper web by means of the IR radiation emitted by the paper web itself.
  • the timing of the illumination and detection is described in greater detail in connection with Figure 3.
  • the same detector is used in measuring the paper web temperature as in measuring the coating.
  • the detector thus detects IR radiation in both coating and temperature measurement and converts the strength of the detected IR radiation into an electric signal of corresponding strength.
  • This electric signal is amplified in a pre-amplifier 109 and converted into digital format in an A/D converter 111.
  • a digital signal processing block 120 measures the strength of the detected IR radiation, calculates the amount of coating and defines the temperature of the paper web.
  • the temperature is defined by utilising the principle that the strength, i.e. output, of the radiation detected by the detector is in relation to the temperature. The more IR output detected by the detector, the higher the temperature of the paper web.
  • the measuring is calibrated to display the correct temperature by measuring objects with known temperatures.
  • the MIR and NIR measurements can thus be performed at different times with one detector 108, from which a measurement signal converted into electric format propagates to the pre-amplifier 109, A/D converter 11 1 and finally to digital signal processing in block 120.
  • the chopper 200 is thus preferably a disc-like optical radiation chopper comprising teeth 202 for preventing the IR radiation from getting from the optical power source to the surface being measured and gaps 204 between the teeth for allowing the IR radiation from the optical power source to pass to the surface being measured.
  • the disc-like chopper 200 also comprises at least two MIR filters 206, 212 which correspondingly allow MIR radiation to pass to the detector on at least two different bands.
  • the MIR filters 206, 212 are located on the circumference of the disc-like chopper 200. The maximum absorption point is measured on one MIR filter band and a point outside the maximum absorption point is measured on the remaining one or more bands.
  • the chopper 200 also comprises at least two NIR filters 208, 214 which allow NIR radiation to pass to the detector on at least two different bands.
  • the NIR filters 208, 214 are located on the circumference of the disclike chopper 200. In this case, too, the optical band of one filter allows NIR radiation to pass to the detector at the maximum absorption point of a component of the coating being measured.
  • One or more other NIR filters allow NIR radiation to pass to the detector on other bands than that of the maximum absorption point.
  • the disc-like chopper 200 comprises filter gaps 210 which prevent IR radiation from propagating to the detectors.
  • the filters 206 and 208 are located so that when optical radiation 230 goes through the teeth 202 on the outer edge of the chopper 200 towards the object being measured, the filters 206 and 208 allow filtered IR radiation 232 and 234 to pass at the same time to the detectors.
  • IR radiation emitted by the paper web is allowed to pass to the detector at a filter point 240 for measuring the temperature of the paper web.
  • the measuring can also be performed in such a manner that one or more filters are replaced by an opening 242 in the chopper 200, which allows radiation to pass to the filter when IR radiation 230 is not directed to the paper web from the optical radiation source required for coating measurement.
  • the detector can receive IR radiation emitted by the paper web itself on its entire response band.
  • the chopper disc 200 is preferably run by an electric motor, and when the disc rotates, the teeth and filter gaps chop the radiation passing to the surface being measured and to the detector(s).
  • the openings 242 and the MIR and NIR filters are located one after the other on the same circumference of the disc-like chopper 200, and alternately allow IR radiation to pass through or filter MIR and NIR radiation for the measurement to one detector (this is not shown in the figure, since it is obvious to a person skilled in the art).
  • a curve 300 shows the penetration of the chopper between the optical power source and the object being measured as a function of time.
  • the chopper comprises optical filters and possibly also openings for passing optical radiation to the surface being measured and for detection.
  • a curve 303 shows the penetration of the chopper between the object being measured and the detector as a function of time on a first wavelength being measured.
  • the initial situation is that the chopper allows optical radiation to pass to both the surface being measured and the detector (curves 330 in Figure 3C and 301 in Figure 3A).
  • the curve 330 is a measurement on a second measured wavelength. The measurement is performed in the same manner on different wavelengths.
  • Figures 3A and 3B show coating measurement on the first wavelength.
  • the chopper first prevents the first radiation used in the measurement from passing to both the surface to be measured and the detector (curve points 302 and 308).
  • coating measurement can be started on the first wavelength at time instant 316. The chopper no longer allows the first radiation to be measured to pass to the detector at curve point 312.
  • Measurement with a third wavelength can be started when the chopper starts to allow radiation to the detector according to the curve 332 of Figure 3D.
  • the chopper also allows radiation to pass to the surface to be measured. This way, several components of the coating can preferably be measured on many wavelengths.
  • Figure 3E shows temperature measurement of paper web according to the invention.
  • the measurement is performed when the paper web is not illuminated with a pulsed optical radiation at time instants 340 and 342.
  • the measurement times can thus be anywhere between the light pulses.
  • Radiation emitted by the paper web is allowed to pass to the detector at time intervals 344 and 346. Measurement is also possible when the source emitting optical radiation to the paper web is switched off. Measuring the temperature of the paper web is then always possible when IR radiation emitted by the paper web is allowed to pass to the detector.
  • the essential thing is that the temperature of the paper web is measured in connection with another optical measurement of the paper web using chopped optical radiation.
  • FIG. 4A and 4B show drying means located in the paper machine drying section for drying the paper being made. In impinged blowing, shown in Figure 4A, hot air is blown from a hood 470 to the paper web 476 on a cylinder or roll, most preferably a dryer roll 472.
  • Figure 4B shows a through-air-blowing arrangement which resembles the impinged blowing arrangement. In this case, there are holes on the surface of a cylinder 482 to allow air flow inside the cylinder 482 and exit it. When hot air is blown from a hood 480 to the paper web 486, the air goes through the web 486 to the cylinder.
  • the blow is controlled by means of temperature measurement by a control block which is preferably a part of the computer-based control system of the paper machine. Temperature can be adjusted in the case of both Figure 4A and 4B by changing the rate and/or temperature of the air flow.
  • the temperature of the paper web is preferably measured at several locations in the transverse direction of the web to form a temperature profile of the paper web.
  • Profile measurement can be performed by one or more sensors in such a manner that the sensors are statical or that the sensors traverse, i.e. move back and forth in the transverse direction of the paper web.
  • Figure 5 shows a solution of this type.
  • the measuring arrangement comprises K sensors 500 measuring the paper web 506, the sensors being functionally connected to a measurement and control block 502, where K is a positive integer.
  • the measurement block 502 preferably controls dryers 504.
  • the dryers 504 can be blow dryers, as shown in Figures 4A and 4B, cylinder dryers operating on stream pressure, or IR dryers.
  • the condition of the dryers can be controlled, optimized and monitored by the solution of the invention.
  • the coating process it is possible to prevent the temperature of the coating paste from rising so high that the surface solidifies. If the surface temperature of the coating paste rises too high and the surface solidifies, water inside the paste boils and explodes the surface.
  • the arrangement for measuring the temperature of paper web according to the invention it is possible to ensure that the temperature of the paper web remains even in both transverse and machine direction. This, for its part, ensures that the shrinkage of the paper remains even, which reduces folding and makes a high production rate possible.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé et un arrangement destinés à mesurer la température d'une bande de papier. Lorsque l'on mesure une propriété de la bande de papier de manière optique par illumination de la surface de la bande de papier au moyen d'un rayonnement optique pulsé, la force de rayonnement infrarouge émise par la bande de papier elle-même, est liée à cette mesure, mesurée sur au moins une période de temps (344, 346) entre des impulsions de rayonnement optique (301, 304, 310, 330, 332, 334), et la température de la bande de papier est déterminée au moyen de la force de rayonnement infrarouge mesurée.
PCT/FI2001/000122 2000-02-10 2001-02-09 Procede et appareil destines a mesurer la temperature d'une bande de papier WO2001059438A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001235519A AU2001235519A1 (en) 2000-02-10 2001-02-09 Method and apparatus for measuring temperature of paper web

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20000283 2000-02-10
FI20000283A FI113088B (fi) 2000-02-10 2000-02-10 Menetelmä ja laite paperirainan lämpötilan mittaamiseksi

Publications (1)

Publication Number Publication Date
WO2001059438A1 true WO2001059438A1 (fr) 2001-08-16

Family

ID=8557432

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2001/000122 WO2001059438A1 (fr) 2000-02-10 2001-02-09 Procede et appareil destines a mesurer la temperature d'une bande de papier

Country Status (3)

Country Link
AU (1) AU2001235519A1 (fr)
FI (1) FI113088B (fr)
WO (1) WO2001059438A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004031752A3 (fr) * 2002-10-03 2004-07-15 Abb Inc Appareil de mesure a ir et procede relatifs a des applications en ligne dans un processus de fabrication
SE1950751A1 (en) * 2019-06-18 2020-12-19 Ircon Drying Systems Ab Arrangement and method for measuring the temperature of a web, including computer program, computer readable medium and control unit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981003704A1 (fr) * 1980-06-10 1981-12-24 Valmet Oy Procede de controle de la qualite de la surface de materiau a l'etat solide d'agregats, et moyens de mise en oeuvre du procede
JPS6153549A (ja) * 1984-08-23 1986-03-17 Chino Works Ltd 光学的測定装置
US4769544A (en) * 1984-06-01 1988-09-06 Measurex Corporation System and process for measuring fiberglass

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981003704A1 (fr) * 1980-06-10 1981-12-24 Valmet Oy Procede de controle de la qualite de la surface de materiau a l'etat solide d'agregats, et moyens de mise en oeuvre du procede
US4769544A (en) * 1984-06-01 1988-09-06 Measurex Corporation System and process for measuring fiberglass
JPS6153549A (ja) * 1984-08-23 1986-03-17 Chino Works Ltd 光学的測定装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004031752A3 (fr) * 2002-10-03 2004-07-15 Abb Inc Appareil de mesure a ir et procede relatifs a des applications en ligne dans un processus de fabrication
US6960769B2 (en) 2002-10-03 2005-11-01 Abb Inc. Infrared measuring apparatus and method for on-line application in manufacturing processes
SE1950751A1 (en) * 2019-06-18 2020-12-19 Ircon Drying Systems Ab Arrangement and method for measuring the temperature of a web, including computer program, computer readable medium and control unit
WO2020256626A1 (fr) * 2019-06-18 2020-12-24 Ircon Drying Systems Ab Agencement et procédé permettant de mesurer la température d'une bande, ainsi que procédé permettant de mettre en œuvre des étapes de mesure de la température
SE543393C2 (en) * 2019-06-18 2020-12-29 Ircon Drying Systems Ab Arrangement and method for measuring the temperature of a web, including computer program, computer readable medium and control unit

Also Published As

Publication number Publication date
FI113088B (fi) 2004-02-27
FI20000283A0 (fi) 2000-02-10
AU2001235519A1 (en) 2001-08-20
FI20000283A (fi) 2001-08-11

Similar Documents

Publication Publication Date Title
US6717148B2 (en) Method and apparatus for measuring coating
US4928013A (en) Temperature insensitive moisture sensor
KR20000070322A (ko) 모발 건조 방법 및 헤어 드라이어
FI94176C (fi) Menetelmä ja laite liikkuvan radan reunan seurannassa
EP1741829B1 (fr) Système de mesure dans une section de séchage raccourcie d'une machine à papier mousseline
EP0516913B1 (fr) Procédé et dispositif pour l'identification photoélectrique d'un matériau en bande
EP2026059B1 (fr) Procédé et appareil pour la détection électromagnétique servant à la fabrication d'un voile fibreux
CA2705864A1 (fr) Systeme de mesure de materiau pour obtenir des proprietes de coincidence et procede apparente
US6526369B1 (en) Apparatus and process for a cross-direction profile of a material web
CA2606768A1 (fr) Detecteur et procedes de mesure des caracteristiques selectionnees de produits feuilles en deplacement
CA2633236A1 (fr) Capteur combine d'humidite et de temperature d'une feuille de papier
EP1546690B1 (fr) Appareil de mesure relatif a des applications en ligne dans un processus de fabrication
CA2374153A1 (fr) Procede et appareil de detection d'une matiere etrangere dans une matiere premiere
EP2480877B1 (fr) Procédé et appareil de mesure en ligne d'une propriété d'une bande continue
EP3341703A1 (fr) Verres à l'oxyde d'holmium comme standards d'étalonnage pour capteurs d'humidité dans l'infrarouge proche
EP2021779A2 (fr) Mesure indépendante de propriétés double face d'un materiau en feuille
EP0745917B1 (fr) Procédé et dispositif de surveillance et de calibrage d'un système de mesure d'un processus
WO2001059438A1 (fr) Procede et appareil destines a mesurer la temperature d'une bande de papier
EP1017995A1 (fr) Procede et appareil de mesure des proprietes d'un papier
WO2000031521A1 (fr) Systeme de controle de feuille en ligne a longueurs d'ondes multiples, sans balayage
FI97571C (fi) Paperirainan kosteusanturi ja menetelmä rainan kosteuden säätämiseksi
JPH0617868B2 (ja) 赤外線式水分測定装置
CS202179B1 (cs) Měřidlo vlhkosti amorfních látek a plynů

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ CZ DE DE DK DK DM DZ EE EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP