EP0868305B1 - Dispositif et procede de surveillance de la quantite de liquide pulverise, dans le sens de la largeur, pour humidifier une bande de materiau en mouvement - Google Patents

Dispositif et procede de surveillance de la quantite de liquide pulverise, dans le sens de la largeur, pour humidifier une bande de materiau en mouvement Download PDF

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Publication number
EP0868305B1
EP0868305B1 EP96939828A EP96939828A EP0868305B1 EP 0868305 B1 EP0868305 B1 EP 0868305B1 EP 96939828 A EP96939828 A EP 96939828A EP 96939828 A EP96939828 A EP 96939828A EP 0868305 B1 EP0868305 B1 EP 0868305B1
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EP
European Patent Office
Prior art keywords
accordance
sprayed
counting device
liquid
material web
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 - Lifetime
Application number
EP96939828A
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German (de)
English (en)
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EP0868305A1 (fr
Inventor
Günter Hess
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weitmann and Konrad GmbH and Co KG
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Weitmann and Konrad GmbH and Co KG
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
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Publication of EP0868305A1 publication Critical patent/EP0868305A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/02—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by dampening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/082—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to a condition of the discharged jet or spray, e.g. to jet shape, spray pattern or droplet size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/08—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements in association with stationary outlet or deflecting elements
    • B05B3/082—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements in association with stationary outlet or deflecting elements the spraying being effected by centrifugal forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1007—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member
    • B05B3/1014—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/45—Sensor for ink or dampening fluid thickness or density

Definitions

  • the invention relates to a method for monitoring the Spray quantity of a material web moving for moistening in the width of sprayed liquid across its width, one Device for performing the method and a Using this device.
  • fast-moving paper webs are required in certain stages of the processing process, for example after passing through a dryer for drying a printing ink.
  • the humidification can either by means of a roller onto which a liquid is sprayed on, or by directly spraying the liquid performed on the fast-running paper web become. In doing so, a liquid becomes transverse to the running direction the material web in the width by a spraying device sprayed so that the web of material on its entire Width is moistened by the liquid.
  • This liquid application technique has also been in the textile, Foil, non-woven, wood, tissue and other industries proven.
  • a device for such moistening moving Material webs is for example from DE 42 27 136 C2 known.
  • this object is achieved by a method according to claim 1 and a device according to Claim 7 for performing the method.
  • the moistening or the application of fleets to a material web in monitored effectively in a simple manner. Should one Spraying device with which to moisten the material web the intended liquid is sprayed into the width, not working correctly, so the web of material over their Width can not be moistened in the desired manner this was determined immediately with the method according to the invention because the moisture content of the material web is not is determined, but the spray quantity of the the material to be applied liquid.
  • the local droplet flow values from the associated setpoints may deviate.
  • the material web over its entire width should be moistened evenly, initially determined target values according to claim 3 after their determination compared with each other. Are the target values correct within certain tolerances do not match, works the spraying device is faulty right from the start.
  • Claim 4 specifies an embodiment of the invention, according to the method according to the invention for permanent monitoring the sprayed liquid can be used.
  • a signal provided in different Way can be used. For example, it could immediately processing the material web can be stopped or it can be used to Call the specialist, who first uncovered the error judged.
  • the method according to the invention makes reliable statements about the quantity of the total sprayed onto the material web Liquid not allowed since the sprayed Liquid recorded locally only in individual measuring ranges is, according to claim 7 after a specific change of amount of liquid sprayed, for example after a change the web speed during a run, the sprayed liquid only on total failure in the monitored respective measuring ranges. This makes sense because a comparison with the initially determined target values for lack the possibility of determining absolute amounts of liquid is no longer possible.
  • a device for performing the inventive The procedure consists of only one counting device by registering individual droplets the local one Droplet flow determined, and an evaluation unit. With the All droplet flows are one after the other registerable by the counting device in each Positions assigned to measuring ranges can be brought. This provides a structurally simple and inexpensive solution represents.
  • the droplets are advantageously for measuring Droplet streams can be optically registered.
  • a favorable embodiment of the counting device is the subject of claim 10.
  • a further protection of the counting device results from the Embodiment of the invention according to claim 12, so that then it is possible to only open the pinhole, if the measuring range of the counting device is to be detected.
  • the counting device can be checked for its function is a test device according to claims 15 and 16 provided so that, for example, after a cleaning process a functional test can be carried out, the certainty indicates that the cleaning process was successful is.
  • Such a configuration also allows a simple and space-saving attachment of the cleaning and testing device according to claim 18.
  • the device according to the invention is advantageous for Different industries can be used according to the requirements 19 and 20.
  • FIGS. 1 and 2 is a schematic diagram next to one according to the invention
  • Monitoring device 10 a spray device 12, by means of which a liquid for moistening a moving material web 14 droplet-shaped in width B. is sprayable.
  • the liquid droplets are shown as small lines or dots 16.
  • the material web 10 can also be moistened indirectly by the liquid first sprayable on a roller and then from this roller is transferable to the material web 14.
  • the monitoring device 10 has a counting device 18, an evaluation unit 20 and preferably a cleaning device 22 and a test device 24.
  • the counting device 18 is attached to a carriage 26, which is preferably longitudinally displaceable on a guide carrier 28 is stored.
  • the guide bracket 28 extends preferably perpendicular to the running direction of the material web 14 at least over the web width B, so that the Counting device 18 over the entire width B of the material web 14 is positionable.
  • the guide bracket 28 is preferably in the immediate vicinity of the spray device 12 and the material web 14 arranged so that the counting device 18 can be brought into positions on the guide carrier 28 in which the counting device 18 passes through measuring ranges 1, 2 and 3 flying droplets 16 can count. In the 1 and 2 measuring ranges 1, 2 and 3 are only exemplary. Depending on the web width B, a larger one can be used or smaller number may be provided.
  • the counting device 18 has a light source, preferably a semiconductor laser 30, a mirror 32, a lens system consisting of lenses 34 and 36, an aperture 38 and a photodiode 40.
  • a light source preferably a semiconductor laser 30, a mirror 32, a lens system consisting of lenses 34 and 36, an aperture 38 and a photodiode 40.
  • This Elements of the counting device 18 are in a housing 42 housed.
  • the laser light emitted is as rays 44 and the light received by the photodiode is as Rays 46 shown in FIG. 3.
  • the photodiode 40 is via an amplifier 48 and one Comparator 50 connected to the evaluation unit 20.
  • Counting device 18 and the sprayed liquid is one Dimming 52 provided the openings, preferably round Has holes, so that pinhole 54, 55, 56 and 57 are formed.
  • the pinhole 55, 56 and 57 define the measuring ranges 1 optically detectable by the counting device, 2 and 3.
  • the perforated screens 54-57 are preferably by means of Cover plates 60 lockable.
  • the Cleaning device 22 is provided in the area of one end of the guide support 28 in the area of one end of the guide support 28 in the Cleaning device 22 is provided.
  • the cleaning device 22 is to a compressed air source, not shown connectable and has a nozzle 62 from which the Compressed air can flow out.
  • the Test device 24 has a defined angular velocity rotatable disc 64 which is concentric arranged, preferably regularly spaced circumferentially Has openings 66.
  • the disk 64 is like this arranged that the laser beam 44 is in the area of the end of the guide carrier 28 positioned counting device 18 Openings 66 can shine through. With rotating The disk is then the laser beam 44 by means of the openings 66 rotating disc interruptible.
  • the material web 14 is, for example, in the direction of the arrow 100 moved past the spraying device 12.
  • the spray device 12 Liquid, for example water or a suitable one Fleet, sprayed in the width B, so that the entire web width B is covered.
  • Spraying device 12 is shown in Figures 4 and 5.
  • the spraying device 12 has, as in FIG. 4 indicated a plurality of turntables 102, which in one transversely to the longitudinal direction of the material web 14 and to the guide beam 28 parallel rows are arranged side by side.
  • the turntable 102 are, as shown in FIG. 5, on one preferably attached lower end of a drive shaft 104 and have a central pot area 106 to which a flat spray flange that extends radially outwards 108 connects.
  • To drive the turntable 102 are their respective drive shafts 104 in a suitable manner, not connected in more detail with a motor.
  • Spraying device 12 is to be defined between the in Rotary plates 102 and the material web 14 arranged in a row an aperture 110 arranged in the area of each turntable 102 a passage opening 112 for onto the material web 14 has liquid to be sprayed on.
  • the so defined Spray areas are fan-shaped and form individual sectors, which are advantageously flush with one another in the plane of the material web connect as shown in Figs. 1, 2 and 4.
  • a spray device can also be used has a roller, the width of the width of the material web corresponds and their axis parallel to the guide beam 28 is arranged. A spread over the width of the material web extending spray jet is then generated in that the roller has liquid applied to its surface jets off by rapid rotation and this jets off Liquid through a slit-shaped opening, the Slot width corresponds to the width of the material web, exit.
  • Another possible spray device consists of individual spray nozzles arranged side by side, the Spray jets cover the entire width of the material web.
  • the counting device 18 by means of the cleaning device 22 cleaned by impurities by means of Compressed air emerging from the nozzle 62 directly from the Counting device 18, in particular the optics of the counting device 18, be blown off.
  • the counting device 18 is shown in FIG Brought test position in which the laser beam 44 open aperture 54 and the disk 64th illuminated.
  • the disk 64 has one on its surface reflective coating. Then through that rotating disk 64 the laser beam 44 with a defined Frequency interrupted. When the laser beam 44 through the Disc 64 is interrupted, a light reflection occurs the reflective surface of the disk 64. That reflected Light 46 is focused by lenses 34 and 36 and mapped onto the photodiode 40. The photodiode 40 is generated a signal which is fed to the amplifier 48 and amplified there and differentiated and subsequent to the comparator 50 is forwarded. The comparator 50 then gives Signal a pulse to the evaluation unit. The of the evaluation unit 20 received pulses with the Angular velocity of the disk 64 compared so that it can be determined whether any reflex of the laser beam 44 was registered.
  • a first Measurement run started.
  • the counting device 18 in a first measurement position along the guide support 28 brought so that the counting device 18 the first measuring range 1 can capture.
  • the pinhole 55 is opened, so that the laser beam 44 illuminates the first measuring area 1.
  • That by the individual through the first measuring range 1 flying droplets 16 reflected light 46 is now registered by the counting device 18 and, as described above, as an electrical impulse per flyby Droplets 16 are fed to the evaluation unit 20 (see FIG. 3).
  • the evaluation unit 20 becomes a mean from six such measurements which determines the local droplet flow for the first Represents measuring range 1. This droplet flow value is called Setpoint for the first measuring range 1 in the evaluation unit 20 saved.
  • the work area A is defined by the Opening the aperture 38.
  • the distances between the counting device 18 and the individual measuring ranges are therefore preferably the same for all measuring ranges and with the Opening the aperture 38 matched so that the fan-like Spray areas are in work area A.
  • the counting device 18 is again in the first Move measuring position and again a local droplet flow measured in the first measuring range 1 and in the evaluation unit 20 saved. Then the other measuring ranges 2 and 3 recorded.
  • the measured droplet flow values of the three measuring ranges with the associated setpoints compared in the evaluation unit 20. For example, gives way the measured droplet flow of the second measuring range 2 from the second setpoint over a predetermined tolerance threshold a signal, for example a warning light, is preferred, operated. The operator of the device can then immediately recognize that there is too little liquid in the measuring range 2 Material web has arrived, that is, the spraying device 12 works incorrectly in this area.
  • the droplet flows of the individual measuring ranges are measured and compared with the target values after each run. So is a constant control of the material web 14th sprayed amount of liquid given. Alternatively it is also possible, the measured droplet flow directly after its determination with the associated setpoint to compare.
  • the counting device 18 After completion of the monitoring process, i.e. termination of all runs, the counting device 18 is cleaned and checked for their function.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Measuring Volume Flow (AREA)
  • Coating Apparatus (AREA)

Claims (20)

  1. Procédé de surveillance de la quantité de liquide pulvérisé dans le sens de la largeur (B) sur une bande (14) de matériau en mouvement, pour l'humidifier sur toute sa largeur (B) :
    caractérisé
    en ce que le flux local de gouttelettes de liquide pulvérisé est mesuré pour chaque secteur de mesure individuel (1, 2 et 3),
    en ce que les mesures des flux locaux de gouttelettes sont sauvegardées en tant que valeurs de consigne
    et en ce que les flux de gouttelettes mesurés sont mesurés de manière répétée et comparés avec les valeurs de consigne des secteurs de mesure respectifs (1, 2 et 3), précédemment établies.
  2. Procédé selon la revendication 1, caractérisé en ce que la saisie des flux locaux de gouttelettes se fait successivement dans les différents secteurs de mesure (1, 2 et 3).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les valeurs de consigne sauvegardées sont comparées entre elles.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'après la détermination initiale des valeurs de consigne, les flux locaux de gouttelettes sont mesurés dans des opérations répétées, au cours desquelles le flux de gouttelettes est saisi et mis en mémoire de manière répétée pour chaque région de mesure (1, 2 et 3 )et en ce que, après chaque opération de mesure, les flux de gouttelettes sont comparés avec les valeurs de consigne déterminées initialement.
  5. Procédé selon l'une des revendications 1 - 3 précédentes, caractérisé en ce que chaque flux mesuré de gouttelettes est comparé, immédiatement après la mesure, avec la valeur de consigne correspondante.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'en cas d'un écart dans au moins une des mesures de flux de gouttelettes par rapport à la valeur de consigne correspondante par une valeur prédéterminée, un signal est émis.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'après une modification appropriée de la quantité de liquide pulvérisé durant une opération, les flux de gouttelettes de chaque secteur de mesure sont déterminés à nouveau.
  8. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 à 7 précédentes, caractérisé en ce qu'un dispositif de mesure (18) prévu pour déterminer les flux de gouttelettes (16) de liquide pulvérisé saisis dans les différents secteurs de mesure (1, 2 et 3) peut être amené dans des positions appropriées des différents secteurs de mesure (1, 2 et 3) pour la détermination des flux de gouttelettes (16) de liquide pulvérisé, et en ce que le dispositif de mesure (18), pour chaque flux de gouttelettes déterminé (16), émet un signal qui est transmis à une unité d'exploitation (20).
  9. Dispositif selon la revendication 8, caractérisé en ce que le dispositif de mesure (18) permet une saisie optique du flux des gouttelettes pulvérisées (16) dans chaque secteur de mesure (1, 2 ou 3) et un enregistrement de ces données optiques.
  10. Dispositif selon l'une des revendications 8 ou 9, caractérisé en ce que le dispositif de mesure (18) positionné en face d'un des secteurs de mesure (1, 2 ou 3) desservis par le dispositif de mesure (18), comprend une source laser (30) et une photodiode (40) détectant la lumière laser (46) réfléchie sur les gouttelettes laser pulvérisées (16).
  11. Dispositif selon l'une des revendications 8 à 10 précédentes, caractérisé en ce que les secteurs de mesure (1, 2 et 3) sont définis par des ouvertures (55, 56 et 57) se trouvant entre l'installation de mesure et le liquide pulvérisé.
  12. Procédé selon la revendication 11, caractérisé en ce que les ouvertures (55, 56, 57) peuvent être couvertes.
  13. Procédé selon l'une des revendications 8 à 12 précédentes, caractérisé en ce qu'un dispositif de nettoyage (22) est prévu pour le nettoyage du dispositif de mesure (18).
  14. Procédé selon la revendication 13, caractérisé en ce que le dispositif de mesure (18) est nettoyable par le dispositif de nettoyage (22) avec de l'air comprimé.
  15. Procédé selon l'une des revendications 8 à 14 précédentes, caractérisé en ce qu'il est prévu un dispositif de vérification (24) pour vérifier le fonctionnement du dispositif de mesure (18).
  16. Procédé selon la revendication 15, caractérisé en ce que le dispositif de vérification (24) présente un disque (64), pouvant tourner à une vitesse angulaire déterminée, comportant des orifices (66) disposés de manière concentrique, et disposé de manière à ce qu'un faisceau (44) de lumière produit par la source laser (30), puisse être interrompu au moyen du disque (64) comportant des orifices (66).
  17. Procédé selon l'une des revendications 8 à 16 précédentes, caractérisé en ce que le dispositif de mesure (18) est disposé sur un support (28) de guidage qui s'étend au minimum sur la largeur (B) de la bande de matériau.
  18. Procédé selon la revendication 17, caractérisé en ce que le dispositif (22) de nettoyage et/ou le dispositif (24) de vérification sont prévus dans la région d'au moins une des extrémités du support (28) de guidage.
  19. Mise en oeuvre du procédé selon l'une des revendications 8 à 18 précédentes pour la surveillance de la quantité de liquide pulvérisé sur un rouleau ou sur une bande de matériel, dans un procédé d'impression offset.
  20. Mise en oeuvre du procédé selon l'une des revendications 8 à 18 précédentes pour la surveillance de la quantité de liquide pulvérisé sur une bande de matériel textile, une bande de film, une bande de matériau de laine ou une bande de matériau comportant de la cellulose.
EP96939828A 1995-12-12 1996-11-16 Dispositif et procede de surveillance de la quantite de liquide pulverise, dans le sens de la largeur, pour humidifier une bande de materiau en mouvement Expired - Lifetime EP0868305B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19546260 1995-12-12
DE19546260A DE19546260C1 (de) 1995-12-12 1995-12-12 Verfahren zur Überwachung der Sprühmenge einer zur Befeuchtung bewegter Materialbahnen in die Breite versprühten Flüssigkeit über deren Breite, Vorrichtung zur Durchführung des Verfahrens, sowie Verwendung der Vorrichtung
PCT/EP1996/005043 WO1997021544A1 (fr) 1995-12-12 1996-11-16 Dispositif et procede de surveillance de la quantite de liquide pulverise, dans le sens de la largeur, pour humidifier une bande de materiau en mouvement

Publications (2)

Publication Number Publication Date
EP0868305A1 EP0868305A1 (fr) 1998-10-07
EP0868305B1 true EP0868305B1 (fr) 2000-03-29

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EP96939828A Expired - Lifetime EP0868305B1 (fr) 1995-12-12 1996-11-16 Dispositif et procede de surveillance de la quantite de liquide pulverise, dans le sens de la largeur, pour humidifier une bande de materiau en mouvement

Country Status (6)

Country Link
US (1) US6016751A (fr)
EP (1) EP0868305B1 (fr)
JP (1) JP2000501663A (fr)
KR (1) KR19990072081A (fr)
DE (2) DE19546260C1 (fr)
WO (1) WO1997021544A1 (fr)

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CN107538768B (zh) * 2017-08-25 2019-08-06 北京星航机电装备有限公司 一种非刚性热防护构件的粘接装配方法
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DE3830732C2 (de) * 1988-09-09 2000-05-25 Heidelberger Druckmasch Ag Verfahren zur Feuchtmittelführung bei einer Offset-Druckmaschine
US5520113A (en) * 1989-03-09 1996-05-28 Heidelberger Druckmaschinen Ag Method of regulating dampening medium
DE4214139C2 (de) * 1992-04-29 2002-01-10 Heidelberger Druckmasch Ag Verfahren zur Feuchtmittelregulierung beim Drucken von einem Formzylinder in einer Offsetdruckmaschine
US5368817A (en) * 1992-07-08 1994-11-29 Toppan Printing, Co., Ltd. Dampening water controller
DE4227136C3 (de) * 1992-08-17 1998-08-13 Weitmann & Konrad Fa Verfahren und Vorrichtung zum Befeuchten einer bedruckten und anschließend thermisch getrockneten, bewegten Materialbahn, insbesondere Papierbahn
US5412577A (en) * 1992-10-28 1995-05-02 Quad/Tech International Color registration system for a printing press
DE4238557A1 (de) * 1992-11-14 1994-05-19 Koenig & Bauer Ag Verfahren zur Einstellung der Feuchtmittelmenge bei einer Offset-Rotationsdruckmaschine
GB9411908D0 (en) * 1994-06-14 1994-08-03 John Heyer Paper Ltd Web monitoring for paper machines

Also Published As

Publication number Publication date
WO1997021544A1 (fr) 1997-06-19
DE59604852D1 (de) 2000-05-04
JP2000501663A (ja) 2000-02-15
KR19990072081A (ko) 1999-09-27
US6016751A (en) 2000-01-25
EP0868305A1 (fr) 1998-10-07
DE19546260C1 (de) 1996-11-21

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