EP0757129B1 - Système d'application pour un appareil de revêtement d'une feuille de papier ou carton - Google Patents

Système d'application pour un appareil de revêtement d'une feuille de papier ou carton Download PDF

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Publication number
EP0757129B1
EP0757129B1 EP96106054A EP96106054A EP0757129B1 EP 0757129 B1 EP0757129 B1 EP 0757129B1 EP 96106054 A EP96106054 A EP 96106054A EP 96106054 A EP96106054 A EP 96106054A EP 0757129 B1 EP0757129 B1 EP 0757129B1
Authority
EP
European Patent Office
Prior art keywords
roll
web
application system
application
coating
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
EP96106054A
Other languages
German (de)
English (en)
Other versions
EP0757129A1 (fr
Inventor
Ingo Becker
Gerhard Wohlfeil
Reinhard Knop
Hans Dr. Rückert
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.)
Voith Patent GmbH
Original Assignee
Jagenberg Papiertechnik GmbH
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
Priority claimed from DE19604934A external-priority patent/DE19604934A1/de
Application filed by Jagenberg Papiertechnik GmbH filed Critical Jagenberg Papiertechnik GmbH
Publication of EP0757129A1 publication Critical patent/EP0757129A1/fr
Application granted granted Critical
Publication of EP0757129B1 publication Critical patent/EP0757129B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/083—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets being passed between the coating roller and one or more backing rollers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • D21H23/58—Details thereof, e.g. surface characteristics, peripheral speed

Definitions

  • the invention relates to an application system for a device for coating a Paper or cardboard web according to the preamble of claim 1 and one Coating device with an application system according to the invention.
  • devices with a Application system used, from which the coating material directly onto the web or first applied to a roller, which then applied the film Transfer coating material to the web.
  • the devices for direct coating have a deflecting the web Counter roll on.
  • the application system is in the area wrapped in the web arranged the counter roller and carries coating material in excess on the Web on.
  • roller applicators contain one by means of a Drive rotatable applicator roller, the outer surface of which is in operation with the counter roller forms an application gap, the coating material from the web entry side in Excess is supplied.
  • roller applicator known from DE-A-36 23 402 there is a fixed gap between the counter roller and the application roller, the counter roll is therefore not pressed against the web.
  • the coating devices referred to as film presses have two against one another pivotable press rolls, which form a press nip through which the Web is guided.
  • Application systems are arranged on one or both press rolls, who apply a metered film of coating material to the outer surface, which is then transferred to the web in the press nip.
  • DE-A-40 33 521 describes such a coating device with a transfer roller serving press roll on which an application system with a nozzle chamber is arranged.
  • WO-A-94/23126 describes a generic application system with an application roller, which has a diameter of 5 mm to 200 mm and the Back roll facing away from the back of a holder over the entire working width is supported against deflection. Due to the small diameter of the Application roller can the dosing system at a short distance behind the application system arranged to cover the penetration distance between application and doctoring to keep low. The support of the applicator roller reduces deflection effects, from the dead weight or the hydrodynamic pressure in the application gap result, considerably, so that smaller gap widths can be set.
  • the invention is based on the object of a generic application system improve that coating material with different rheological properties evenly and with an adjustable amount directly on the web or on a Roller can be applied.
  • an adjustable roller can be used with the application roller Back pressure to the hydrodynamic pressure in the application gap between application roller and the counter roll or a transfer roll wrapped in the web are exercised to influence the hydrodynamic conditions. This can be used to achieve a more even job and / or influence the amount of the order, including the penetration rate in the web.
  • the application roller Since the application roller is supported over its entire length, its diameter is fixed as a freely selectable parameter for optimizing the hydrodynamic conditions in the Order gap and to reduce negative effects, e.g. B. film splitting Available.
  • the invention also relates to coating devices.
  • a coating device in which the application system the coating material directly onto a paper or cardboard web applies.
  • the use for direct application to a web is particularly advantageous, because with the application system, the hydrodynamic pressure in the application gap can influence the penetration of the coating material into the web crucially depends.
  • the use of the application system according to the invention is not based on that direct orders limited. It can also be used to apply coating material on a press roll of a film press, a transfer roll of an air knife machine or other rollers to make a film on the roller to produce the desired strength and uniformity, which then follows the Paper or cardboard web is delivered.
  • the coating device has an application system 1 and in the direction of rotation Paper or cardboard web 2 arranged at a distance behind it with a metering system 3 a metering element, preferably a doctor blade 4 as a doctor element. Coating paint is applied in excess from coating system 1 as coating material the paper or cardboard web 2 is applied and then from the metering element (Scraper knife 4) of the metering system 3 to the desired coating weight scraped off again.
  • a scraper knife 4 are as metering elements rotatable squeegee bars, squeegee bars or an air knife can also be used.
  • On Air knife consists of a slot nozzle that extends across the web width a jet of compressed air is directed against the excess film.
  • the web 2 is from a counter roller 5, 22 supported over their entire width.
  • the application system 1 and the metering system 3 are each separate Counter roll 5, 22 assigned.
  • the metering system 3 is constructed in a known manner:
  • the scraper knife 4 is clamped with its foot in a clamping bar 7, which is displaceable in the direction of the counter roller 5 in a doctor bar 8 is stored.
  • the application system 1 contains one with a rotary drive connected applicator roller 10 with a smooth outer surface, which extends over the entire Working width, i. e. the maximum web width.
  • the application roller 10 has a diameter of 40 mm to 600 mm, preferably between 100 mm and 400 mm, and is limited at both ends radially to the counter roller 5 movably mounted to the width of the order gap between it and the counter roller 5 to be able to vary.
  • the application roller 10 is preferably on its outer surface coated with a rubber-elastic material.
  • the applicator roller 10 of one that extends over its entire length - i.e. over the entire working width Supported element that is movable in the direction of the applicator roller 10 limited is mounted on a rigid holder.
  • the support element is by means of a Support-supporting pressure hose 14 in which extends over the working width Direction to applicator roller 10 can be pressed.
  • the support element is a rod 11 with a circular cross section.
  • the diameter of the rod 11 is less than that the application roller 10, in the present example it is approximately 25 mm. If necessary is connected to a rotary drive on one side.
  • the hose 14 is incorporated at the bottom of the part 12 of the bed 12, which can be pressurized with compressed air to the rod 11 against the To apply roller 10.
  • the upper part of the bed 12 widens in a dovetail shape, to seal the holder 13.
  • the inner walls of the bed 12 are only in sections, interrupted by channels 15 for coolant and lubricant, on the Rod 11 on.
  • the holder 13 is screwed to two side pivot arms 16, which by means of a piston-cylinder unit 17 in the direction of the counter roller 5 and this can be swung away.
  • the pivoting movement to the counter roller 5 can be limited by an adjustable stop 18 to a certain Adjust the working position of the application roller 10 relative to the counter roller 5.
  • the swivel arms 16 Fixed in the area of the applicator roller 10 ink chamber 19, which itself extends over the entire working width and is open to the application roller 10.
  • the Ink chamber 19 is supplied with coating material via a feed line 20.
  • a guide plate 21 adjoins its upper boundary wall, which is approximately parallel to the outer surface of the applicator roller 10 runs at a short distance from this and ends at a short distance from the counter roller 5, so that only a narrow Overflow channel to the counter roller 5 remains free.
  • the overflowing coating material is returned to the ink chamber 19.
  • the support element is a Support bar 24 with a smooth surface, of which the applicator roller 10 over its entire Length is supported.
  • the support bar 24 has a uniform length Cross-section and a convex curved surface with which they against the Applicator roller 10 can be pressed.
  • As a rigid holder on which the support strip 24 delimits The lower boundary wall serves to be movable in the direction of the application roller 10 25 of the ink chamber 19.
  • the support strip 24 has inwardly angled legs on both longitudinal sides each of which engages around an outwardly angled guide rail 26 which are attached in parallel at a distance from one another on the wall 25 of the ink chamber 19.
  • the guide rails 26 and the encompassing legs of the support bar 24 are so designed that enough play for the desired mobility of the support bar 24th is present in the direction of the counter roll 10.
  • the pressure hose 14 is arranged, which thus supports the support bar 24 when compressed air is supplied presses in the direction of the application roller 10.
  • the possibility of movement of the support bar 24 radially to the applicator roller 10 is on the one hand by the angled outward Part of the guide rails 26, the other limited by the wall 25. This Parts act as stops that stop further movement.
  • a support bar 24 as a support element has a rotatable support rod 11 the advantage that no lateral rotary drive is necessary.
  • the side seal the ink chamber 19 is thus simplified.
  • the application system corresponds to the Figures 3 and 4 in its construction of the embodiment described above according to Figure 1; there is also a baffle 21 through which the coating material the application gap between the counter roller 5 and the application roller 10 is supplied.
  • a vent is formed via the stop 18 when the pressure hose 14 is vented from 0.01 mm to 2 mm, preferably from about 0.8 mm between the application roller 10 and the lane 2 set.
  • the ink chamber 19 is coating material in Excess and supplied under pressure by the baffle 21 in the application gap between the counter roller 5 and applicator roller 10 and there to the web 2nd is handed over. The excess coating material runs on the back of the Baffle 21 and is returned to the ink chamber 19.
  • the order column the order on the web 2 from the co-or counter-driven applicator roller 10 equalized.
  • the amount of coating material applied can can be influenced by the pressure in the pressure hose 14.
  • the pressure hose 14 generated force presses the application roller 10 in the direction of the counter roller 5 and acts thus counteracts the resulting hydrodynamic force in the application gap.
  • it can be set with the pressure in the pressure hose 14 as a manipulated variable. At the same time becomes with the pressure in the direction of the counter roller 5, an equalization of the excess order reached.
  • Order system 1 can also be operated so that a fixed gap between the Applicator roller 10 and the counter roller 5 is set. This is done in the pressure hose 14 no pressure built up.
  • the wall 25 serving as a holder is towards Application roller 10 moves up until the legs of the support bar 24 on it support.
  • the support bar 24 is then moved upward and pushes the application roller 10 in the vertical position with the desired fixed distance to the counter roller 5, 22.
  • the applicator roller 10 is inelastic in this mode of operation supported against the liquid pressure in the application gap.
  • the web 2 between the application and Dosing is guided essentially in a straight line, in order to direct the to minimize centrifugal forces acting on the excess film.
  • very high web speeds of more than 1000 m / min curved path between the application and dosing considerable centrifugal forces on the excess film, which are directed away from the web 2.
  • the Centrifugal forces lead to coating material being sprayed off and / or Unevenness in the excess film, e.g. B. to form lines of tension, the can no longer be balanced during dosing.
  • the configuration of a coating device described below can be at very high web speeds, a coating with a very uniform Achieve line art.
  • the web 2 is one of each Counter roll 5, 22 supported over its entire width. Loop 2 wraps around first the counter roller 5 of the application system 1, then becomes straight the counter-roller 22 of the metering system 3 out and leaves it after wrapping at a certain angle.
  • the diameter d1 of the counter roller 5 des Application system 1 is 300 mm to 1000 mm
  • the diameter d2 of the counter roller 22 of the dosing system 3 is 500 mm to 1500 mm.
  • the distance a the two counter-rollers 5, 22 from each other is chosen as small as possible without touch the counter rollers 5, 22. In any case, it is smaller than 500 mm, preferred smaller than 200 mm.
  • the dimensions of the counter rolls 5, 22 in Dependence on the machine width and speed chosen so that none negative dynamic effects, e.g. B. natural frequencies, the coating process affect.
  • the counter rolls 5, 22 are suspended in the frame of the coating device that the linear path 23 running between them at an angle ⁇ from 0 ° to 90 °, preferably 30 ° to 60 °, rising towards the horizontal. This angular range ensures trouble-free backflow of the metering element doctored coating color.
  • the Applicator roller 10 arranged so that the angle ⁇ 1 between the radius r1 Counter roll 5 at the end of the order nip and the straight-line path 22 Is 85 ° to 95 °.
  • the angle ⁇ 1 is preferably 90 °, so that the web 2 Order gap leaves straight.
  • the web 2 running onto the counter roller 5 is so led that the wrap angle ⁇ 1 to 0 ° to the end of the application zone 135 °, preferably 90 ° to 135 °.
  • the Web 2 safely guided smoothly against the counter roller 5 when applying.
  • the metering system 3 is arranged on its counter roller 22 so that the Dosing line of the dosing element - in FIG. 3 the doctor knife tip - in the area is where the rectilinear web section 23 runs onto the counter roller 22. So will ensures that the web 2 is straight or only insignificant before dosing is curved.
  • the angle ⁇ 2 between the straight line 23 and the radius r2 of the counter roller 22 to the metering line is 85 ° to 95 °.
  • Behind the The counter roll 22 is wrapped around the metering line by the web 2 at an angle ⁇ 2, which is 0 ° to 90 °, preferably 3 ° to 60 °.
  • the counter rolls 5, 22 are coated on their outer surface with rubber, preferably with a shore hardness of approx. 80.
  • the straight line Web section 23 on the uncoated back of one of the two counter rolls 5, 22 circumferential support band supported.
  • they need Counter rolls 4, 5 not to be coated, since the support belt is made of one material is made that has the required elasticity and hardness for application and dosing having.
  • Supporting the web 2 when applying and metering with two separate Counter rolls 5, 22 has the further advantage that there is a controlled web tension can be adjusted between application and dosing. This enables one Minimize the risk of a web breaking during coating.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Unwinding Webs (AREA)

Claims (16)

  1. Système d'application pour un appareil de revêtement d'une bande de papier ou de carton (2) avec un rouleau d'application (10) ayant une surface latérale lisse, qui
    forme avec un rouleau (5) une fente d'application ouverte, dans laquelle une matière de revêtement est introduite par le côté d'entrée de la bande,
    peut tourner au moyen d'un dispositif d'entraínement, et
    est soutenu contre la courbure, sur toute la largeur de travail, sur sa face arrière située à l'opposé du rouleau (5),
       caractérisé en ce que le rouleau d'application (10) est soutenu par un élément de soutien s'étendant sur la largeur de travail, qui est appuyé sur un support rigide (13, 25) en étant déplaçable de façon limitée en direction du rouleau d'application (10), l'élément de soutien pouvant être poussé en direction du rouleau d'application (10) au moyen d'un tuyau gonflable (14) s'appuyant sur le support (13, 25) et s'étendant sur la largeur de travail.
  2. Système d'application suivant la revendication 1, caractérisé en ce que l'élément de soutien est une barre (11) rotative supportée dans le sommier (12).
  3. Système d'application suivant la revendication 1, caractérisé en ce que l'élément de soutien est appuyé dans un sommier (12) ouvert vers le rouleau d'application (10) et s'étendant sur la largeur de travail, qui est fabriqué à partir d'une matière à élasticité limitée analogue au caoutchouc et ajusté dans le support rigide (13), le tuyau gonflable (14) étant disposé entre le sommier (12) et le support (13).
  4. Système d'application suivant la revendication 1, caractérisé par une baguette de soutien (24) à surface lisse en guise d'élément de soutien, qui est appuyée sur le support (25) d'une façon mobile, limitée par des butées, en direction du rouleau d'application (10), le tuyau gonflable (14) étant disposé entre la baguette de soutien (24) et le support (25).
  5. Système d'application suivant la revendication 4, caractérisé en ce que la baguette de soutien (24) présente une section transversale uniforme sur sa longueur et une surface à courbure convexe.
  6. Système d'application suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que le tuyau gonflable (14) est divisé, sur la largeur de travail, en plusieurs chambres de pression pouvant être alimentées séparément en air comprimé.
  7. Système d'application suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que le rouleau d'application (10) présente un diamètre de 40 mm à 600 mm, de préférence de 100 mm à 400 mm.
  8. Système d'application suivant l'une quelconque des revendications 1 à 7, caractérisé en ce qu'avant l'élément de soutien (11) dans le sens de rotation du rouleau (5), est disposée un réservoir de couleur (19) avec une alimentation (20) pour une matière de revêtement, qui est ouverte vers le rouleau d'application (10).
  9. Système d'application suivant la revendication 8, caractérisé en ce qu'à la paroi de limitation supérieure du réservoir de couleur (19) se raccorde un déflecteur (21), qui est approximativement parallèle à la surface latérale du rouleau d'application (10) et sé termine à une faible distance du rouleau (5).
  10. Appareil de revêtement d'une bande de papier ou de carton (2) avec
    un rouleau antagoniste (5) déviant la bande (2),
    un système d'application (1) disposé dans la région du rouleau antagoniste (5) embrassée par la bande (2), qui applique de la matière de revêtement en excès sur la bande (2), et
    un système de dosage (3) disposé à distance après le système d'application (1) dans le sens de défilement de la bande, avec un élément de dosage, en particulier une lame de racle (4),
       caractérisé par un système d'application (1) suivant une ou plusieurs des revendications 1 à 9, dans lequel le rouleau d'application (10) forme la fente d'application avec le rouleau antagoniste (5).
  11. Appareil suivant la revendication 10, caractérisé en ce que des rouleaux antagonistes séparés, entre lesquels la bande (2) est guidée de façon rectiligne, sont disposés à distance l'un de l'autre pour le système d'application (1) et pour le système de dosage (3).
  12. Appareil suivant la revendication 11, caractérisé en ce que le diamètre d1 du rouleau antagoniste (5) du système d'application (1) vaut 300 mm à 1000 mm, le diamètre d2 du rouleau antagoniste (22) du système de dosage (3) vaut 500 mm à 1500 mm et la distance a entre les deux rouleaux antagonistes (5, 22) l'un par rapport à l'autre vaut moins de 500 mm, de préférence moins de 200 mm.
  13. Appareil suivant la revendication 11 ou 12, caractérisé en ce que la portion de bande rectiligne (6) est ascendante sous un angle α de 0° à 90°, de préférence de 30° à 60°, par rapport à l'horizontale.
  14. Appareil suivant l'une quelconque des revendications 11 à 13, caractérisé en ce que le rouleau d'application (10) du système d'application (1) est disposé de manière telle que l'angle β1 entre le rayon r1 du rouleau antagoniste (5) à la fin de la zone d'application et la portion de bande rectiligne (6) soit compris entre 85° et 95°, et en ce que le système de dosage (3) est disposé sur son rouleau antagoniste (22) d'une manière telle que l'angle β2 entre la. portion de bande rectiligne (6) et le rayon r2 du rouleau antagoniste (5) à la ligne de dosage soit compris entre 85° et 95°.
  15. Appareil suivant l'une quelconque des revendications 11 à 14, caractérisé en ce que le rouleau antagoniste (5) du système d'application (1) est embrassé par la bande (2) sur un angle de contact γ1 jusqu'à la fin de la fente d'application de 0° à 135°, de préférence 90° à 135°, et le rouleau antagoniste (22) du système de dosage (3) est embrassé par la bande (2), après la ligne de dosage, sur un angle γ2 qui vaut de 0° à 90°, de préférence de 3° à 60°.
  16. Appareil de revêtement d'une bande de papier ou de carton avec un rouleau et un système d'application associé au rouleau, qui dépose sur la surface latérale du rouleau un film de matière de revêtement, qui est ensuite transféré du rouleau à la bande, caractérisé par un système d'application suivant une ou plusieurs des revendications 1 à 9.
EP96106054A 1995-07-29 1996-04-18 Système d'application pour un appareil de revêtement d'une feuille de papier ou carton Expired - Lifetime EP0757129B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19527903 1995-07-29
DE19527903 1995-07-29
DE19604934 1996-02-10
DE19604934A DE19604934A1 (de) 1995-07-29 1996-02-10 Auftragsystem für eine Vorrichtung zum Beschichten einer Papier- oder Kartonbahn

Publications (2)

Publication Number Publication Date
EP0757129A1 EP0757129A1 (fr) 1997-02-05
EP0757129B1 true EP0757129B1 (fr) 2001-12-05

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EP96106054A Expired - Lifetime EP0757129B1 (fr) 1995-07-29 1996-04-18 Système d'application pour un appareil de revêtement d'une feuille de papier ou carton

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Country Link
US (1) US5766350A (fr)
EP (1) EP0757129B1 (fr)
AT (1) ATE210223T1 (fr)
ES (1) ES2167480T3 (fr)

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DE4212611A1 (de) * 1992-04-15 1993-10-21 Voith Gmbh J M Einrichtung zum Beschichten laufender Bahnen aus Papier oder Karton
DE9206355U1 (de) * 1992-05-12 1992-08-06 J.M. Voith Gmbh, 7920 Heidenheim Einrichtung zum Beschichten laufender Bahnen aus Papier oder Karton
DE4309937A1 (de) * 1993-03-26 1994-09-29 Jagenberg Ag Vorrichtung zum Beschichten einer Papier- oder Kartonbahn
DE4334555C2 (de) * 1993-10-11 2003-06-26 Jagenberg Papiertech Gmbh Halterung für eine Rakelstange
DE4341341C1 (de) * 1993-12-06 1995-03-09 Jagenberg Ag Dosiersystem für Vorrichtungen zum Beschichten von Materialbahnen, insbesondere Papier- oder Kartonbahnen
US5599392A (en) * 1995-07-24 1997-02-04 Beloit Technologies, Inc. Rod holder with separate positionable contact elements for rod metering

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EP0757129A1 (fr) 1997-02-05
ATE210223T1 (de) 2001-12-15
US5766350A (en) 1998-06-16
ES2167480T3 (es) 2002-05-16

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