EP0029865B1 - Dispositif et procédé pour le couchage de bandes en mouvement notamment en papier ou en carton - Google Patents

Dispositif et procédé pour le couchage de bandes en mouvement notamment en papier ou en carton Download PDF

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Publication number
EP0029865B1
EP0029865B1 EP79104840A EP79104840A EP0029865B1 EP 0029865 B1 EP0029865 B1 EP 0029865B1 EP 79104840 A EP79104840 A EP 79104840A EP 79104840 A EP79104840 A EP 79104840A EP 0029865 B1 EP0029865 B1 EP 0029865B1
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EP
European Patent Office
Prior art keywords
scraper
web
entry
support roll
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
Application number
EP79104840A
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German (de)
English (en)
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EP0029865A1 (fr
Inventor
Rainer Esser
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.)
Zanders Feinpapiere AG
Original Assignee
Zanders Feinpapiere AG
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Filing date
Publication date
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Application filed by Zanders Feinpapiere AG filed Critical Zanders Feinpapiere AG
Priority to AT79104840T priority Critical patent/ATE1769T1/de
Priority to EP79104840A priority patent/EP0029865B1/fr
Publication of EP0029865A1 publication Critical patent/EP0029865A1/fr
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Classifications

    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • 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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • 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
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
    • D21H5/006—Controlling or regulating
    • D21H5/0062—Regulating the amount or the distribution, e.g. smoothing, of essentially fluent material already applied to the paper; Recirculating excess coating material applied to paper

Definitions

  • the invention relates to the coating of paper or cardboard webs with conventional pigment dispersions, in particular the setting of the wet application weight of the coating material.
  • the dry application weights are between 5 and 35 g / m 2 .
  • the coatings are usually made from an aqueous dispersion with different dry matter contents, so that the wet application weights are considerably higher. It has proven to be expedient to first apply an excess of coating material to the running material web and then to remove it again from the surface by means of metering devices, the aim being at the same time to smooth the coating surface.
  • the known metering devices include roller applicators in connection with metering rollers, so-called reserve roll coaters, roller scraper metering devices, also known as squeegees, and smoothing scraper devices, better known under the abbreviation Blade.
  • the coated material web is carried by a support device, for example a roller, and is carried by the metering unit, e.g. As a blade or squeegee, a pressure is exerted on the web which counteracts the coating composition.
  • a support device for example a roller
  • the metering unit e.g. As a blade or squeegee, a pressure is exerted on the web which counteracts the coating composition.
  • DE-B-1 071 039 describes a device for regulating the application weight, in which the web is carried on the uncoated side by a support roller referred to as a coating drum, while a doctor blade arranged on the coated side is provided for adjusting the application weight.
  • This doctor blade is arranged on a rotatably mounted shaft and can be pressed against the running web with a selectable contact pressure.
  • US-A-2051403 discloses a coating device in which the essential is the formation of the scraper.
  • This stripper which is designed in a special form, has two different radii in the course of its curvature, the end of the inlet flank not being intended to be a sharp edge, since such a surface leads to a faulty surface and unsatisfactory results.
  • GB-A-968617 describes a scraper with which an application thickness which fluctuates regularly in the direction of travel of the web is obtained.
  • the stripper is designed as a soft cylindrical part and the web is supported by a flat plate at the moment of stripping.
  • the lower edge of the scraper is kept at a distance from the web.
  • the scraper has a convex surface after the narrowest point, which ends abruptly in a groove, so that a step is formed. This stage formation is intended to return coating material adhering to the stripper to the web at periodic intervals.
  • US-A-1925092 describes a smoothing device for coatings with a cylindrical scraper which has a sharp edge by making a groove. It is also proposed that the cylinder can have several such grooves, so that it can be rotated through 180 ° for cleaning without having to interrupt the coating process. In order to be able to exert the necessary contact pressure, the web is guided around the inlet flank of the wipers.
  • US-A-2 344 232 describes a scraper with a convex curved surface on the inlet side, which ends with a sharp edge, the scraper then having a profile perpendicular to the tangent of the curved surface.
  • the radius of curvature of the inlet flank should be between 4.8 and 25.4 mm. The web is guided over the edge of the scraper without a counter-pressure roller.
  • US-A-3453137 is directed to a specific design of the wiper end of a blade in the form of a movably placed strip with a flat contact surface for coating, which ends in a sharp, running edge.
  • US-A-2534320 describes a stripper with a sheet thickness between 3 and 12 mm, the inlet flank of which ends in a sharp edge, the radius of curvature of the inlet flank roughly matching the radius of curvature of 150 mm of the roller supporting the web with an elastic surface .
  • the scraper is arranged in a rotatable holder and can be pressed onto the web surface with different pressure, so that the surface of the support roller is deformed.
  • the application thickness depends on the roller diameter, the hardness of the roller surface and the peripheral speed of the rollers.
  • Blade blades and doctor blades are, by themselves, not sufficiently stable tools and require brackets and guides that give them the required straightness, bending strength and resistance to the back pressure of the coating material. Particularly high demands are made on the designs of such mounts. With today's common web widths of several meters and web speeds of up to 1200 m per minute, the requirements can only be met to a certain extent by appropriate design.
  • the rollers used can be adjusted with the required accuracy even with large widths, but the surface qualities achieved with them often do not meet the requirements, because after passing through the zone with the highest pressure, touching the layer surface is still unavoidable. This causes the coating to split with more or less severe loss of surface smoothness. Depending on the doctor blade diameter, this effect also occurs with these metering devices. In contrast, the blade blades have a sharp edge delimiting the coating zone and thus avoid subsequent contact.
  • one or the other of the known metering devices has proven to be more suitable. In practice, roller metering has proven itself better for higher coat weights, while smooth scraping devices are preferred for low coat weights and high web speeds.
  • the currently possible and usual coating systems can have working widths of up to 6000 mm.
  • the working speeds and the application weights are heavily dependent on the types and the desired properties; for LWC paper (LWC is derived from light weight coated), for example, they are up to 1200 m / min. with application weights up to 10 g / m 2 and side; for cardboard, for example, up to 250 m per minute with application weights of around 30 g / m2. per page and for so-called art paper up to 600 m per minute with application weights of approx. 25 g / M 2.
  • the object of the present invention is to provide a device for setting application weights for web coatings and to demonstrate a method in which paper webs are coated with conventional pigment dispersions, both low and high wet application weights having very good surface qualities being achieved by different modes of operation.
  • the invention relates to a device for coating running webs, for example paper or cardboard, in which an excess of coating material is removed with a fixed scraper, which has a curved inlet flank on the inlet side with a sharp-edged end, which with preselectable pressure on the coated Side can be pressed against a roller with an elastic surface supporting the running web on the uncoated side and the scraper can be pivoted about an axis (D) running parallel to the central axis (B) of the support roller.
  • a fixed scraper which has a curved inlet flank on the inlet side with a sharp-edged end, which with preselectable pressure on the coated Side can be pressed against a roller with an elastic surface supporting the running web on the uncoated side and the scraper can be pivoted about an axis (D) running parallel to the central axis (B) of the support roller.
  • the distinguishing feature is that the rigid scraper is designed as a roller sector, the infusion tank has a radius of curvature of 50-200 mm and the sharp-edged end of the scraper can be pressed against the web in a line that is in a line through the central axis (B) the support roller and the axis of rotation (D) of the scraper defined plane.
  • the invention further relates to a method for coating running webs with the claimed device, in which first an excess of coating material is applied to the web and then the excess with a fixed Ab Scraper is removed again, or in which the scraper also serves as an application device and the scraper presses into the elastic surface of the support roller.
  • the distinguishing feature is that in order to achieve low wet application weights, the press zone is shortened and the angle of the inlet gap between the support roller and the inlet flank of the scraper is increased by swiveling the scraper around its axis of rotation, the sharp-edged end of the inlet flank of the scraper being 0.5-100 mm from the plane that forms the center axis (B) of the support roller and axis of rotation (D) of the stripper, after which the side facing the inlet gap is removed, or that the pressing zone is lengthened in order to achieve high wet application weights by extending the stripper about its axis of rotation (D) pivots, the sharp-edged end of the inlet flank of the scraper 0.5-5.0 mm out of the plane, form the central axis (B) of the support roller and axis of rotation (D) of the scraper, after the side facing away from the inlet gap is removed.
  • Embodiments of the device according to the invention are characterized in the subclaims.
  • Figure 1 A material web, for example a paper or cardboard web 1, is fed to the support roller 2 via a deflection roller 3, wraps around it and is discharged again via a further deflection roller 3 and reaches subsequent parts of the coating system, for example a dryer, not shown.
  • a customary and known application unit 4 With the help of a customary and known application unit 4, an excess of coating material is applied to the web and in the press zone, formed by the support roller 2 and the stripper 5, removed from the web 1 and reaches a collecting trough (not shown).
  • the set coating thickness 8 remains on the web 1 behind the stripper 5.
  • the center distance of the parallel axes, the central axis B, the support roller 2 and the rotational or pivoting axis D of the stripper 5 can be set very precisely and reproducibly.
  • the support roller 2, the wiper 5, which is shown in simplified form as the roller sector, and the application unit 4, which is only shown schematically and by way of example, are accommodated in a stable frame which contains the necessary drive devices for the application unit 4 and the support roller 2.
  • the distance between the axes B and D can be adjusted via the bearings of the stripper 5 on both sides in the frame. By reducing this distance, a pressure in the direction of the central axis B of the support roller 2 can be exerted by means of the stripper 5 and a press zone can be formed between the elastic surface of the support roller 2 and the stripper 5.
  • the coated web passes through this press zone, in which the application thickness is set.
  • the stripper 5 is pivotable about its axis D, so that both the sharp-edged end of the inlet flank 6 and any points on the curved inlet flank 7 of the stripper 5 can be brought into contact with the surface of the coated web to form the press zone.
  • the facilities required for the exact and reproducible setting of the scraper 5 are accommodated in or on the chair.
  • the desired contact pressure on the support roller will be generated mechanically, hydraulically or pneumatically via the ends of the stripper 5 on both sides.
  • pneumatic systems have proven themselves better than mechanical or hydraulic systems and are therefore preferred for use in the device according to the invention.
  • FIG. 2 In this arrangement, which differs from FIG. 1, the material web is brought to the support roller 2 via a deflection roller 3, wraps around it and is removed via a second support roller 3.
  • the stripper 5 in combination with the trough 9 and the web 1 forms the application station in which the application thickness of the coating material is also regulated by means of the stripper 5.
  • the shape of the cross-section of the scraper is freely selectable, only a cross-section is required which results in a rigid scraper even with working widths of 3000-5000 mm and which has a curved inlet flank with a sharp-edged end and an axis of rotation.
  • a preferred embodiment of the scraper 5 is that as a sector of a roller with the axis of rotation D, the curved inlet flank 7 and the sharp-edged end 6.
  • the radius of curvature of the inlet flank 7 can be between 30 and 500 mm. Radii of 50 to 200 mm are preferred. Radii from 75 to 130 mm have proven particularly useful.
  • the sharp end 6 of the inlet flank 7 is formed with the help of an interchangeable hard metal rail.
  • one side of the rail is ground in accordance with the radius of curvature of the inlet flank in order to avoid discontinuities in the inlet flank.
  • 10 mm thick stainless steel rails have proven successful, but other corrosion-resistant materials can also be used if they are sufficiently hard and abrasion-resistant, for example appropriate plastics.
  • FIG 3 This embodiment, in which several wipers 5 are combined into one unit, offers the advantage that the individual wipers 5 can have not only the same, but also differently curved inlet flanks 7.
  • a plurality of wipers 5 are arranged on a cylindrical body 12, for example a roller body. These wipers are advantageously evenly distributed over the surface of the roller body. Symmetrical arrangements are preferred, but not a requirement.
  • the radius of the roller body is expediently chosen to be so large that it is identical to the largest desired radius of curvature of the inlet flanks 7. As a result, part of the surface of the roller body forms the inlet flank 7 of one or more wipers 5.
  • the sharp-edged ends of the inlet flanks 6 of all wipers 5 arranged on the roller body 12 are equidistant from the axis of rotation D of the roller body. Desired smaller radii of curvature of a part of the wipers 5 are produced by appropriately working out the inlet flanks 7 without the need to change the distance between the edges 6 and the center of the roll.
  • the required stripper 5 with its sharp-edged end 6 can be brought into the working position with respect to the support roller.
  • This embodiment makes it possible to replace the stripper 5 by simply swiveling the roller body about its axis of rotation D without major interruptions in operation.
  • Such a change may be necessary, for example, if the sharp-edged end 6 of the curved inlet flank 7 is defective or dirty.
  • a different radius of curvature of the inlet flank 7 of the scraper may also be required when changing the product to change the application weight.
  • no conversion is necessary in this case, it is sufficient to swivel the roller body in order to bring the required wiper 5 into the working position.
  • the radii of curvature of the inlet flanks used in this embodiment are the same as in the formation of the wipers as roller sectors and are between 30 and 500 mm.
  • the radius of the support roller 2 not shown in FIG. 3 but in FIGS. 1 and 2 is 150-500 mm, depending on the working width, with larger working widths generally requiring larger radii in order to avoid deflections.
  • the back-up roller has an elastic covering on a hard core. Synthetic rubber types or synthetic polymers with the necessary elasticity are suitable for this.
  • the surface hardness of the backup roller can be determined using various measurement methods. Pusey and Jones plastometers (P + J units, measured with the% "ball) or Shore hardness measuring devices (Shore A, measured with truncated cone) are common.
  • the preferred embodiments of the method according to the invention, in which the scraper is pivoted about its axis of rotation enables the application weight to be set in a particularly large area.
  • a flat inlet gap and an extension of the press zone between the scraper and backup roller are required.
  • the edge of the scraper is removed on the side facing away from the inlet gap on the plane which forms the central axis B of the support roller and the axis of rotation D of the scraper.
  • the scraper is pivoted so that the edge is removed from the plane on the side facing away from the inlet gap. Only a small distance, up to about 5 mm, is possible without sacrificing the quality of the line surface.
  • the highest wet application weights are achieved for a given radius of curvature of the inlet flank of the scraper.
  • the application weight is also dependent on the contact pressure of the scraper, the properties of the material to be coated, for example the base paper, the properties of the coating material and the machine speed.
  • a steep inlet gap and a short press zone are required to keep the application weight as low as possible.
  • the scraper is rotated about its axis and the edge, ie the sharp-edged end of the inlet flank, is removed from the plane of the axes of the support roller and scraper on the side facing the inlet nip.
  • the distance of the edge from the plane can be 0.5-100 mm. In the normal case, however, for a given radius of curvature and constant contact pressure of the scraper, about 50 mm, for example, are sufficient to reduce the application weight from 30 g / m 2 and side to 7 g / m 2 and less.
  • the surface hardness of the backup roller also has an influence. A shorter press zone is created on harder surfaces with a correspondingly low press-in depth of the scraper, so that the distance of the edge from the plane required for a certain weight reduction is smaller than with softer support roller surfaces.
  • the main effect is achieved by increasing the inlet angle of the metering gap. The larger the angle, ie the steeper the scraper engages, the lower the application weight if the parameters are otherwise unchanged.
  • the angle can be influenced by a corresponding choice of the radius of curvature of the inlet flank of the scraper and also by an arrangement of the support roller and scraper, in which the axes lie on an inclined plane.
  • these possibilities of influence are exhausted during the construction of the plant and are then no longer variable.
  • the preferred embodiment of the invention, in which a plurality of wipers are arranged on a cylindrical body, has proven to be particularly advantageous in this regard, since a number of different radii of curvature are available without major retooling.
  • a so-called coating base paper with a weight per unit area of 75 g / m 2 should be coated A) with 7 g / m 2 or B) with 25 g / m 2 of a coating composition of the following composition:
  • the coating color also contains the necessary proportions of dispersing aid, defoamer and other customary additives.
  • the coating system has the arrangement shown in FIG. 1.
  • the web width is 315 cm.
  • the design according to FIG. 3 is used as the scraper, 4 scraper having the same radius of curvature (150 mm) being arranged on the roller body.
  • the backup roller has a diameter of 800 mm, the surface hardness is 46 Shore A (140 P + J units).
  • an excess of coating material is first applied by means of a conventional dipping roller and removed again by the wiper.
  • the sharp-edged end of the scraper is pressed so strongly against the coated web surface that the hydrodynamic pressure of the coating material that builds up is overcome and a pressing zone is formed while pressing in the elastic surface of the support roller. Because of this elasticity, a gap is formed between the support roller surface and the scraper edge in the operating state, through which the coated web passes with a defined application thickness.
  • the desired application thickness remains on the web. Higher pressure and a short press zone reduce the coating thickness. Conversely, longer press zones or lower pressure lead to high application weights.
  • a short pressing zone is achieved in that the sharp-edged end of the stripper is pressed against the web surface so strongly at the point formed in the plane formed by the central axis of the support roller and the axis of rotation of the stripper that the support roller surface is pressed in.
  • a shorter or longer press zone is created, with smaller radii shortening the press zone.
  • the pressing zone can be shortened even further by swiveling the stripper around its axis of rotation, whereby the sharp-edged end of the inlet flank of the stripper is removed from the plane, the central axis of the support roller and the axis of rotation of the stripper, to the side of the inlet gap. This increases the angle of the inlet gap between the support roller and the inlet flank of the scraper.
  • the enlargement has the same effect as the reduction in the radius of curvature of the inlet flank of the scraper.
  • An extension of the pressing zone for a given radius of curvature of the inlet flank is achieved by swiveling the scraper around its axis of rotation, the sharp-edged end of the inlet flank forming out of the plane, the central axis of the support roller and the axis of rotation of the scraper, after the side facing away from the inlet nip is removed .
  • a major advantage of the method according to the invention is that, regardless of the desired application weight, such a contact pressure can always be selected that enables the gap to be formed exactly across the web, even with larger working widths.
  • the prerequisite for this is the correct elasticity of the support roller surface, which must enable the stripper to be pressed so hard that a deformation of the support roller surface creates a stable press zone that is exactly the same across the web and the rigid stripper.
  • the contact pressure should be as low as possible, taking into account the design effort of the scraper, back-up roller and their bearings in the frame. However, it must be so large that at least that of the usual web speeds of up to 1200 m / min. building hydrodynamic pressure of the coating is compensated.
  • a further advantage of the method according to the invention is that very different application weights with less fluctuations than previously customary are possible with only one device, in particular in large work areas. In this way, the surface and transparency of the coating are achieved in a way that was previously only possible with different metering devices specially adapted to high or low application weights.
  • the advantage of the stripper which is inherently rigid according to the invention, is that it can not only be produced with the required accuracy without great difficulty, but can also be adjusted with great accuracy and reproducibility across the web.
  • the metering gap which forms between the support roller and the scraper during operation is of equal thickness at all points across the web and permits less deviations from the target weight than was possible with the metering devices known hitherto.
  • the device is of course also suitable for dosing coating compositions which do not contain pigment.

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Claims (9)

1. Dispositif pour le couchage de bandes en mouvement (1 notamment en papier ou en carton, dans lequel un excès de matière de couchage est enlevé à l'aide d'une racle immobile (5), qui, du côté de l'entrée, présente un flanc d'attaque courbe (7) pourvu d'un bord (6) à arête vive, ledit bord pouvant être serré sous une pression préalablement sélectionnable contre la face à coucher d'une bande en mouvement (1 ), soutenue par sa face vierge sur un cylindre de soutien (2) à surface élastique, tandis que ladite racle (5) peut pivoter autour d'un axe (D) parallèle à l'axe de révolution (B) du cylindre de soutien (2), caractérisé par le fait que la racle (5), rigide par définition, a la forme d'un secteur cylindrique, que le flanc d'entrée (7) a un rayon de courbure allant de 50 à 200 mm, et que le bord a arrête vive (6) de ladite racle (5) peut être serré contre la bande le long d'une ligne située dans un plan défini par l'axe de révolution (B) du cylindre de soutien (2) et l'axe de pivotement (D) de la racle (5).
2. Dispositif selon la revendication 1, caractérisé par le fait que la racle (5), rigide par définition, est un corps de cylindre (12), à la surface duquel plusieurs racles (5) sont formées selon une séquence régulière.
3. Dispositif selon les revendications 1-2, caractérisé par le fait que le bord à arrête vive (6) du flanc d'entrée (7) de chacune des racles (5) est formé par un barreau en métal dur.
4. Dispositif selon les revendications 1-3, caractérisé par le fait que
a) le rayon du cylindre d'appui (2) est compris entre 150 et 500 mm et que
b) la dureté de la surface élastique du cylindre d'appui (2) est comprise entre 74 et 34 unités Shore A.
5. Dispositif selon la revendication 4, caractérisé par le fait que la dureté de la surface élastique du cylindre d'appui (2) est comprise entre 56 et 41 unités Shore A.
6. Dispositif selon la revendication 4, caractérisé par le fait que la dureté de la surface élastique du cylindre d'appui (2) est comprise entre 50 et 44 unités Shore A.
7. Dispositif selon les revendications 1-6, caractérisé par le fait que le rayon de courbure du flanc d'attaque (7) de la racle (5) est compris entre 75 et 130 mm.
8. Procédé pour le couchage de bandes en mouvement à l'aide d'un dispositif selon les revendications 1-7, suivant lequel on dépose d'abord sur la bande de la matière de couchage en excès et on enlève l'excédent à l'aide d'une racle immobile, ou suivant lequel la racle sert simultanément de dispositif d'application, ladite racle enfonçant la surface élastique du cylindre d'appui dans une zone de compression, caractérisé par le fait que, pour obtenir un poids unitaire élevé de dépôt humide, on prolonge la zone de compression en faisant pivoter la racle autour de son axe de pivotement (D), le bord à arrête vive du flanc d'attaque de ladite racle s'éloignant alors de 0,5 à 5,0 mm, en direction opposée à la fente d'entrée, du plan formé par l'axe de révolution (B) du cylindre d'appui et l'axe de pivotement (D) de la racle.
9. Procédé pour le couchage de bandes en mouvement à l'aide d'un dispositif selon les revendications 1-7, suivant lequel on dépose d'abord sur la bande de la matière de couchage en excès et on enlève ensuite l'excédent à l'aide d'une racle immobile, ou suivant lequel la racle sert simultanément de dispositif d'application, ladite racle enfonçant la surface élastique du cylindre d'appui dans une zone de compression, caractérisé par le fait que, pour obtenir un poids unitaire faible de dépôt humide, on raccourcit la zone de compression et l'on agrandit l'angle de la fente d'entrée qui sépare le cylindre d'appui du flanc d'attaque de la racle, en faisant pivoter la racle autour de son axe de pivotement, le bord à arrête vive du flanc d'attaque de ladite racle s'éloignant alors de 0,5 à 100 mm, en direction de ladite fente d'entrée, du plan formé par l'axe de révolution (B) du cylindre d'appui et l'axe de pivotement (D) de la racle.
EP79104840A 1979-12-03 1979-12-03 Dispositif et procédé pour le couchage de bandes en mouvement notamment en papier ou en carton Expired EP0029865B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT79104840T ATE1769T1 (de) 1979-12-03 1979-12-03 Vorrichtung und verfahren zum beschichten von laufenden bahnen beispielsweise aus papier oder karton.
EP79104840A EP0029865B1 (fr) 1979-12-03 1979-12-03 Dispositif et procédé pour le couchage de bandes en mouvement notamment en papier ou en carton

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP79104840A EP0029865B1 (fr) 1979-12-03 1979-12-03 Dispositif et procédé pour le couchage de bandes en mouvement notamment en papier ou en carton

Publications (2)

Publication Number Publication Date
EP0029865A1 EP0029865A1 (fr) 1981-06-10
EP0029865B1 true EP0029865B1 (fr) 1982-11-10

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EP79104840A Expired EP0029865B1 (fr) 1979-12-03 1979-12-03 Dispositif et procédé pour le couchage de bandes en mouvement notamment en papier ou en carton

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EP (1) EP0029865B1 (fr)
AT (1) ATE1769T1 (fr)

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DE3129251C2 (de) * 1981-07-24 1984-05-17 Rainer 5060 Bergisch Gladbach Esser Vorrichtung zur Regulierung des Auftragsgewichtes von Beschichtungen auf in laufender Bahn geführtem Material
DE4230241C2 (de) * 1992-09-10 1994-07-14 Voith Gmbh J M Auftragswerk zur Beschichtung von Bahnen aus Papier oder Karton
RU2009123291A (ru) * 2009-06-19 2010-12-27 Андрей Виленович Любомирский (RU) Способ формирования декоративного покрытия на поверхности длинномерного изделия (варианты)
DE102009050917B3 (de) * 2009-10-23 2010-10-07 Salzgitter Mannesmann Präzisrohr GmbH Rakelstange für Dosiersysteme zum Verteilen und Abstreifen eines flüssigen oder viskosen Mediums auf laufenden Materialbahnen
DE102010052649A1 (de) * 2010-11-30 2012-05-31 Horst Sprenger Gmbh Vorrichtung zum Beschichten von Papier- oder Kartonbahnen

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EP0029865A1 (fr) 1981-06-10
ATE1769T1 (de) 1982-11-15

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