EP0761878A2 - Dispositif d'application de matériau fluide ou pâteux sur une bande en mouvement, en particulier de papier ou carton - Google Patents

Dispositif d'application de matériau fluide ou pâteux sur une bande en mouvement, en particulier de papier ou carton Download PDF

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Publication number
EP0761878A2
EP0761878A2 EP96113068A EP96113068A EP0761878A2 EP 0761878 A2 EP0761878 A2 EP 0761878A2 EP 96113068 A EP96113068 A EP 96113068A EP 96113068 A EP96113068 A EP 96113068A EP 0761878 A2 EP0761878 A2 EP 0761878A2
Authority
EP
European Patent Office
Prior art keywords
doctor
doctor element
liquid
cleaning
application
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96113068A
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German (de)
English (en)
Other versions
EP0761878B1 (fr
EP0761878A3 (fr
Inventor
Zygmunt Madrzak
Benjamin Méndez
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
Voith Sulzer Papiermaschinen 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
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Publication of EP0761878A2 publication Critical patent/EP0761878A2/fr
Publication of EP0761878A3 publication Critical patent/EP0761878A3/fr
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Publication of EP0761878B1 publication Critical patent/EP0761878B1/fr
Anticipated expiration legal-status Critical
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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
    • B05C1/0813—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 characterised by means for supplying liquid or other fluent material to the roller
    • 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
    • B05C1/0817—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 characterised by means for removing partially liquid or other fluent material from the roller, e.g. scrapers
    • 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
    • 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
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • 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
    • B05C11/026—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an elongated body renewable by feeding it across the 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
    • 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
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34—Knife or blade type coaters
    • D21H23/36—Knife or blade forming part of the fluid reservoir, e.g. puddle-type trailing blade or short-dwell coaters
    • 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
    • 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
    • D21H25/10—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with blades

Definitions

  • the invention relates to a device for applying a liquid or pasty medium to a running material web, in particular made of paper or cardboard, according to the preamble of claim 1.
  • a liquid or pasty medium in the form of paint, impregnating liquid, starch or the like is applied to the running web of material.
  • the material web can consist of paper or cardboard or of a textile material.
  • the liquid or pasty medium can be applied to the running material web either directly or indirectly.
  • direct application the material web on the outer surface of the roller is guided past the application unit and in the area of the application chamber, the liquid or pasty medium is applied directly to the material web in the form of a coating film via the application doctor blade.
  • the roller thus serves as a counter roller to the applicator.
  • the liquid or pasty medium is first applied to the surface of the roller and then taken over by the material web which touches the roller.
  • Such a device with an upstream cleaning squeegee is already known, for example, from EP 0 319 503.
  • a doctor blade is used as a cleaning doctor.
  • This doctor blade is also provided in the immediate vicinity of its effective surface or edge with openings or channels through which liquid or pasty medium flows out of the application chamber.
  • the arrangement of the openings or channels in the doctor blade is made such that the emerging liquid or pasty stream of the medium strikes the roller or material web surface and rinses off the scraped-off particles.
  • pre-wetting is achieved during rinsing, which improves the quality of the subsequent job.
  • a generic device which uses a rotatable doctor rod on the cleaning doctor instead of a doctor blade. It has been found that fibers, foreign particles or the like attach less to a doctor blade than to a doctor blade and the rinsing and prewetting effect achieved by the doctor rod is not worse than when a doctor blade is used. Larger accumulations of fibers, foreign body particles or the like do not build up on this doctor rod, since they are surprisingly continuously cleared away with the rotary movement of the doctor rod.
  • the object of the present invention is therefore to develop a device of the type described in the introduction in such a way that the cleaning effect is further improved, in particular when the pressure in the application chamber is increased, and streaking on the material web caused by contaminants is effectively avoided.
  • a device for applying a liquid or pasty medium to a running web of material, in particular made of paper or cardboard, with the features of claim 1.
  • the doctor element is arranged to be movable in a direction that is essentially parallel to its longitudinal extent.
  • the device according to the invention allows in a simple and effective manner to achieve a cleaning effect which is considerably improved compared to conventional devices or methods, in particular also in the case of an increase in the pressure in the application chamber of the device.
  • the use of the device according to the invention thus leads to a higher quality end product with increased economy.
  • the device according to the invention further comprises at least one movement device for moving the doctor element in the direction essentially parallel to its longitudinal extension.
  • at least one movement device for moving the doctor element in the direction essentially parallel to its longitudinal extension.
  • contaminants can be removed substantially continuously from the roller surface or the material web, directly in front of the metering element, e.g. the squeegee.
  • the movement of the squeegee element can be carried out by hand, by motor or automatically.
  • the movement device for the continuous, discontinuous, periodic, oscillating and / or step-wise movement of the doctor element in the direction essentially parallel to the longitudinal extension of the doctor element.
  • the doctor element can also be periodically moved a little further. Due to these different types of movement in the direction mentioned, the cleaning effect of the doctor element can be increased and increased Different properties of the material web and the liquid or pasty medium can be adapted.
  • the doctor element is arranged rotatably or rotatably about its longitudinal axis.
  • the movable arrangement of the squeegee element in a direction essentially parallel to its longitudinal extension is particularly simple and effective and can be carried out without complex structural measures.
  • a doctor element has also led to positive results, which is arranged rotatably about its longitudinal axis.
  • the doctor element has an essentially circular cross section. This cross-sectional shape allows a particularly economical production of the doctor element according to the invention and a structurally simple arrangement of the doctor element in the device.
  • the doctor element is rope-like or band-like.
  • the doctor element has both flexible and tensile properties, so that it is easy to handle, easily combined with a suitable movement device and can be stored or disposed of in a space-saving manner.
  • the rope or band-like doctor element has a struck or braided structure.
  • the doctor element can be produced simply and effectively by methods known from rope production, such as twisting, twisting and stranding or by braiding, and Various materials used for the doctor element can be combined into a doctor element with certain desired properties by means of this structure and the associated manufacturing method.
  • a band-like doctor element can also be produced by several rope-like parts lying next to one another, which are joined together, for example by sewing together, to form a flat rope.
  • the doctor element has at least one of its two front ends an extension extending in the longitudinal direction of the doctor element.
  • This extension can be an end fitting that allows the doctor element to be connected to a suitable movement device, or an extension of the doctor element itself.
  • the squeegee element is e.g. can be wound onto a suitable device or stowed on the device according to the invention. It is also possible to replace possible material wear of the doctor element with this extension, for example by the doctor element is transported further by the movement device and a new doctor element section is made available.
  • doctor element which extend in the longitudinal direction, are joined to form an endless loop.
  • the doctor element can be moved particularly simply and effectively like an endless belt or the like and a continuous removal of impurities with a high cleaning effect on the roller surface or the material web can be achieved.
  • the movement devices used in connection with an endless doctor element can also be designed very simply and inexpensively.
  • a further design feature according to the invention provides that the device comprises at least one coil device, on which at least a section of the doctor element can be wound.
  • a coil device is particularly suitable for a doctor element which has two free ends and can thus be easily wound onto the coil device or moved in a desired manner by a driven coil device.
  • the device further comprises at least one deflection device for the doctor element.
  • the deflection device e.g. is a driven deflection device can be easily realized.
  • the doctor element is preferably at least partially made of an elastic material with an elastic modulus of ⁇ 40,000 N / mm 2 . It is further provided in the sense of the invention that the elastic material is a sponge-like material. Such materials are particularly soft and flexible and therefore do not impair the material web used. In addition, these materials are easy to compress and have a large inner surface, which allows particularly good absorption of fibers, filler particles, grains of sand or other particles and also allows these impurities to be washed out just as effectively. The doctor element according to the invention is therefore also outstandingly suitable for problematic material webs, such as waste paper.
  • the elastic material is connected to a substantially inelastic carrier material.
  • This carrier material ensures a secure transmission of the forces applied by the movement device for moving the doctor element to it and prevents excessive wear of the elastic material.
  • the connection of the elastic material with the inelastic carrier material, or vice versa, can take place by twisting, stranding or interweaving the two materials or in any other suitable way, for example by gluing or the production of a composite end product.
  • a particularly advantageous embodiment of the invention provides that the doctor bed of the cleaning doctor is divided over its length into several sections spaced apart by at least one intermediate space, the at least one intermediate space forming an overflow opening for the liquid or pasty medium.
  • the sections of the doctor bed do not necessarily have to have a uniform length.
  • the intermediate spaces serving as overflow openings can also have different sizes. Due to the overflow of the liquid or pasty medium, the doctor element loaded with impurities is washed out. Long fibers or coarse contamination particles, in particular, possibly adhering to the doctor element are stripped off when the doctor element is moved through the doctor bed at the spaces between the doctor beds and washed away by the liquid or pasty medium passing through the spaces of the doctor bed. In this way, excellent cleaning results can be achieved.
  • the doctor bed of the doctor element has at least one liquid chamber into which the doctor element at least partially protrudes.
  • at least one pressure generating device such as a pressure pump or the like, corresponding to the liquid chamber.
  • the device according to the invention preferably further comprises at least one cleaning device for the doctor element.
  • This cleaning device can be a container filled with a cleaning agent, a spray device that sprays a cleaning agent onto the doctor element, or the like.
  • a further increase in the cleaning effect of the doctor element and thus a high-quality material web surface can thus be achieved.
  • the cleaning squeegee is designed as an overflow weir, which forms a gap to the application roller, so that the liquid or pasty medium can pass between the cleaning squeegee and the roller.
  • the size of this gap ie the distance the side of the doctor element facing the roller to the surface of the roller can be adjusted in the sense of the invention in a range from 0 to 1 mm; this dimension refers to the usual dimensions of generic devices, it can of course vary depending on the application.
  • This feature advantageously allows both an effective cleaning action by the doctor element and at the same time an overflow control of the liquid or pasty medium.
  • the doctor bed carried by an elastic holder of the cleaning doctor is designed impermeable to the liquid or pasty medium.
  • an undesired pressure loss in the application chamber is thus avoided and a reduction in the amount of liquid or pasty medium circulated for cleaning purposes and a reduction in the size of the circulating devices required for this purpose are supported.
  • the applicator 1 is arranged approximately in the eight o'clock position of an applicator roller 2, which is in the direction of arrow P turns.
  • a material web such as a paper web, runs in the usual way on the application roller 2, but is not shown in the drawings for the sake of clarity.
  • the application unit 1 has a color distribution channel 3, via which liquid or pasty medium M is supplied from the side via a color distribution tube (not shown).
  • the liquid or pasty medium M passes from the ink distribution channel 3 via a nozzle 4 into an application chamber 5, which is essentially delimited by an application doctor 6 and a cleaning doctor 7.
  • the doctor blade 6 is of conventional design and has a doctor rod 8 which is mounted in a doctor bed 9 which is fastened in a conventional manner to a bar 10 and via a known adjusting device 11 is adjustable in its position with respect to the application roller 2.
  • the cleaning squeegee 7, which is arranged at a distance from the application squeegee 6 at a distance from the direction of rotation P of the application roller 2, comprises a squeegee element 12 which is mounted in a squeegee bed 13.
  • the doctor bed 13 is in turn attached to the upper free end of an elastic holding web 14.
  • Doctor bed 13 and holding webs 14 together form the holder of the cleaning doctor blade 7.
  • the other free end of the holding web 14 is fixed to a nozzle flap 15, which can be folded in a known manner for cleaning purposes toward the center of the roller and is adjustable for adjusting the nozzle 4.
  • the holding web 14 of the cleaning squeegee 7 is completely closed, so that the liquid or pasty medium M from the application chamber 5 cannot pass through the holding web 14. In this way it is ensured that there are no pressure losses at this point, which is relatively far from the contact surface of the cleaning squeegee 7 with the application roller 2 and is not optimal for a self-cleaning action of the cleaning squeegee 7 by rinsing by means of the liquid or pasty medium M.
  • the applicator also has, on the side of the nozzle flap 15 opposite the ink distribution tube 3, a return channel 16, which carries a so-called air boundary layer scraper 17 on its upper side, the edge 18 of which reaches close to the surface of the applicator roller 2.
  • the outlet 16a of the return channel 16 is connected to a pressure generating device, that is to say a pressure increasing pump 16b, into which there is also a feed line 20 for fresh liquid or pasty medium M. flows.
  • the output 16c of the pressure increase pump 16b is in turn connected to the paint distribution pipe 3.
  • the liquid or pasty medium M stripped off by the doctor element 12 of the cleaning doctor 7 from the surface of the application roller 2 is thus recycled and reused together with the fresh liquid or pasty medium supplied via the feed line 20.
  • FIG. 2 shows, in a viewing direction according to arrow II in FIG. 1, a schematic frontal view of the device according to the invention in the area of the cleaning squeegee 7.
  • the rope-like or band-like doctor element 12 is arranged to be movable in the doctor bed 13 in a direction essentially parallel to its longitudinal extension D. Furthermore, the doctor element 12 is positioned in a rotationally fixed manner about its longitudinal axis; rotation of the doctor element 12, as is known in conventional cleaning doctor blades, is therefore not possible here. However, a rotatable arrangement of the doctor element 12 about its longitudinal axis is provided according to the invention for certain applications.
  • the two free ends of the doctor element 12 are equipped with end fittings 21 which are used for connection to a movement device, not shown in FIG. 2, which moves the doctor element 12 in an oscillating manner in the above-mentioned direction.
  • the doctor bed 13 of the cleaning doctor 7 is divided over its entire length into a plurality of sections 13.1 to 13.n spaced apart by at least one intermediate space 22.
  • the length of the individual sections 13.1 to 13.n is about 10 and 50 mm in the present case in order to achieve the largest possible number of spaces 22.
  • the sections of the doctor bed 13 need not necessarily have a uniform length.
  • the doctor bed 13 can also have sections with different lengths as required.
  • the spaces 22 of the doctor bed 13, that is to say more precisely in this case: the spaces 22, the doctor element 12 and the top of the holding web 14 together form openings 19 through which the liquid or pasty medium flows from the application chamber 5 to the return channel 16 and thereby can wash out contaminated doctor element 12.
  • a portion of the liquid or pasty medium flowing out through the openings 19 also strikes the surface area 23 of the application roller 2 which adjoins the cleaning doctor 7 outside the application chamber 5 and thus realizes the known rinsing and prewetting effect.
  • the flow cross section of a single intermediate space 22 between two adjacent sections of the doctor bed 13 is approximately 10 to 50 mm 2 .
  • the values mentioned can vary depending on the respective application. These dimensions ensure that on the one hand the flow of the liquid or pasty medium through the spaces 22 for the purpose of cleaning the doctor element 12 and for pre-wetting the applicator roller 2 is intense enough, but on the other hand the pressure loss and the flow rate occurring are sufficiently limited to the to keep the total amount of liquid in the circulation circuit and thus the required energy consumption of the circulation or pressure increase pump 16b low.
  • FIG. 3 shows a schematic sectional illustration of the doctor element 12 along the line III-III in FIG. 2, the rope-like, laid structure of the doctor element being particularly well recognizable.
  • the doctor element 12 is essentially made of a sponge-like, elastic material 12.1 with an elastic modulus of less than or equal to 40,000 N / mm 2 .
  • This material 12.1 can be easily compressed and has a high inner surface, which ensures a particularly good absorption of fibers, filler particles, grains of sand or other particles as well as an equally effective washing out of these impurities.
  • the doctor element 12 according to the invention is therefore also outstandingly suitable for problematic material webs, such as waste paper.
  • the sponge-like, elastic material 12.1 is preferably suitably connected to an essentially inelastic carrier material 12.2.
  • the connection can be made by twisting, stranding or interlacing the two materials 12.1, 12.2 or in some other way, for example by gluing or the production of a composite material from 12.1 and 12.2.
  • the carrier material 12.2 in the present case also forms the core of the rope-like doctor element.
  • the doctor element 12 has an essentially circular cross section.
  • the cross section can, however, also be slightly oval or polygonal in order to avoid rotation or torsion of the doctor element 12 as a result of the force of the liquid or pasty medium or the application roller 2.
  • FIG. 4 shows, in the viewing direction according to arrow II in FIG. 1, a schematic frontal view of the device according to the invention in the area of the cleaning squeegee 7 with further details.
  • the basic structure of the cleaning squeegee 7 corresponds essentially to the structure as described in connection with FIGS. 2 and 3.
  • the free ends at the end of the rope-like doctor element 12 are provided with extensions 12.3 extending in the longitudinal direction of the doctor element, the end sections of which are wound onto two driven coil devices 24 which are each arranged to the side of the doctor bed 13.
  • the driven coil devices 24 function as movement devices for moving the doctor element 12.
  • the mobility of the coil devices 24 is indicated in the drawing by double arrows.
  • an oscillating movement or a gradual further movement of the doctor element 12 is preferably realized in a direction running essentially parallel to its longitudinal extension D.
  • FIG. 5 shows a schematic front view of a second embodiment of the device according to the invention in the area of the cleaning doctor blade 7 with further details.
  • the basic structure of the cleaning squeegee 7 in turn corresponds essentially to that according to FIGS. 2 and 3.
  • the special feature of this variant is that the free Ends of the doctor element are joined to form an endless loop and this endless loop runs over a plurality of deflection or support rollers 25, 26, one of the rollers simultaneously serving as the drive roller 26.
  • This arrangement is particularly suitable for a continuous or periodic movement of the doctor element 12 in a direction essentially parallel to the longitudinal extent D of the doctor element 12.
  • the drive roller 26 is designed in such a way that the doctor element 12 is moved a little further through the doctor bed 13.
  • the mobility of the endless doctor element 12 is indicated in the drawing by a double arrow.
  • the device according to the invention further comprises a cleaning device 27 for the doctor element 12.
  • the cleaning device 27 in the embodiment according to FIG. 5 is arranged on a lower section of the doctor element 12 which is formed into an endless loop.
  • the cleaning device 27 can be designed as a container filled or flowed through with a cleaning agent or as a spray device which sprays the cleaning agent onto the moving doctor element 12, or the like.
  • FIG. 6 shows an enlarged representation of the area X in FIG. 1 with a further detailed variant of the doctor bed 13.
  • the doctor bed 13 has a channel-like liquid chamber 28 on its side facing the application roller 2, into which the rope-like Doctor element 12 partially protrudes.
  • Two lugs 28.1 and 28.2 of the liquid chamber 28 engage behind the largest diameter of the doctor element 12, so that it cannot shift unintentionally or press out excessively from the liquid chamber 28.
  • a suitable pressure generating device corresponding to the liquid chamber 28 of the doctor bed 13 is provided in the device according to the invention. This is not shown in the drawing.
  • a doctor bed 13 is preferably used in this embodiment that is not divided into a plurality of sections or is only equipped with comparatively small passage openings for the liquid or pasty medium.
  • the primary advantage of the design features according to FIG. 6 is that even if the doctor element 12 is worn, it is always pressed securely and precisely against the application roller 2 due to the pressurization of the liquid chamber 28 of the doctor bed 13.
  • the doctor bed 13 of the doctor element 12 is not subdivided into the sections 13.1 to 13.n described above, but rather is designed as a closed overflow weir, the doctor element 12 abutting the roller only slightly and a partial amount of the liquid or pasty medium can flow over a small gap of approximately 0 to 1 mm between doctor element 12 and applicator roller 2 to the return channel 16.
  • This gap ie the distance from the Applicator roller 2 side of the doctor element 12 to the surface of the roller 2, is preferably adjustable.
  • this squeegee element band can likewise be produced by connecting a plurality of rope-like squeegee element parts placed next to one another, which have a round, square or rectangular cross section or the like.
  • the complete doctor element can also have cross-sectional shapes other than those mentioned in the description.
  • doctor element with further profiles which correspond to certain drive or movement mechanisms of the device, for example an additional tooth-like or V-belt-like profile, which have a suitable gear or a V-belt pulley or the like engages.
  • This profiling is preferably to be applied to one side of the doctor element, which does not brush over the material web or the roller.

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  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Paper (AREA)
  • Coating Apparatus (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Making Paper Articles (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP96113068A 1995-09-01 1996-08-14 Dispositif d'application de matériau fluide ou pâteux sur une bande en mouvement, en particulier de papier ou carton Expired - Lifetime EP0761878B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19532388A DE19532388C1 (de) 1995-09-01 1995-09-01 Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
DE19532388 1995-09-01

Publications (3)

Publication Number Publication Date
EP0761878A2 true EP0761878A2 (fr) 1997-03-12
EP0761878A3 EP0761878A3 (fr) 1997-06-25
EP0761878B1 EP0761878B1 (fr) 2002-01-16

Family

ID=7771083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96113068A Expired - Lifetime EP0761878B1 (fr) 1995-09-01 1996-08-14 Dispositif d'application de matériau fluide ou pâteux sur une bande en mouvement, en particulier de papier ou carton

Country Status (7)

Country Link
US (1) US5788771A (fr)
EP (1) EP0761878B1 (fr)
JP (1) JPH09103731A (fr)
AT (1) ATE212093T1 (fr)
CA (1) CA2184516C (fr)
DE (2) DE19532388C1 (fr)
ES (1) ES2171582T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060210A1 (fr) * 1998-05-20 1999-11-25 Valmet Corporation Appareil applicateur et procede de revetement par transfert de film

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19649559A1 (de) * 1996-11-29 1998-06-04 Voith Sulzer Papiermasch Gmbh Vorrichtung zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Streichmediums auf eine laufende Materialbahn
DE19723458A1 (de) 1997-06-04 1998-12-10 Voith Sulzer Papiermasch Gmbh Vorrichtung und Verfahren zum Auftragen eines flüssigen oder pastösen Mediums auf einen sich vorbeibewegenden Untergrund
DE19839916A1 (de) * 1998-09-02 2000-03-09 Jagenberg Papiertech Gmbh Verfahren und Vorrichtung zur Verminderung des Volumens oder Drucks eines Fluids, das von sich bewegenden Oberflächen in einen Spalt eingeschleppt wird
JP2004027441A (ja) * 2002-06-27 2004-01-29 National Printing Bureau エンドレスドクターブレード装置
DE10245072A1 (de) * 2002-09-27 2004-04-08 Voith Paper Patent Gmbh Auftragswerk
DE10245075A1 (de) * 2002-09-27 2004-04-01 Voith Paper Patent Gmbh Auftragswerk
WO2006058367A1 (fr) * 2004-11-30 2006-06-08 Cochlear Acoustics Ltd. Ensemble fixation implantable pour mise en place amovible d'un dispositif medical
DE502006003618D1 (de) * 2006-09-01 2009-06-10 Mitsubishi Hitec Paper Bielefe Vorhangbeschichtungsverfahren sowie eine dafür verwendete Vorrichtung

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Publication number Priority date Publication date Assignee Title
NL268472A (fr) * 1960-08-29
NL125971C (fr) * 1960-09-19
JPS584589B2 (ja) * 1976-08-12 1983-01-27 富士写真フイルム株式会社 塗布方法
DE8400325U1 (de) * 1984-01-07 1985-07-18 Jagenberg AG, 4000 Düsseldorf Vorrichtung zum Beschichten von über eine Stützwalze laufenden Materialbahnen mit regelbarer Auftragsstärke
WO1987000091A1 (fr) * 1985-07-05 1987-01-15 Oy Wärtsilä Ab Application a arret de courte duree avec une grande quantite de pate excedentaire
AT396437B (de) * 1986-10-25 1993-09-27 Voith Gmbh J M Vordosiereinrichtung in einer streichanlage
JPH03501823A (ja) * 1987-10-10 1991-04-25 ツインマー，ヨハネス 塗着装置
FI81734C (fi) * 1987-12-03 1990-12-10 Valmet Paper Machinery Inc Foerfarande och anordning foer applicering och dosering av bestrykningsmedel pao roerligt underlag.
IT1241179B (it) * 1990-02-16 1993-12-29 Beloit Italia S.P.A. Testa patinatrice atta ad applicare uno strato di sospensione di patinatura su un foglio continuo di carta.
FI90575C (fi) * 1992-01-30 1994-02-25 Valmet Paper Machinery Inc Laite liimapuristimessa
SE501564C2 (sv) * 1993-06-18 1995-03-13 Btg Kaelle Inventing Ab Bestrykningsanordning för en eller tvåsidig bestrykning av en löpande bana
DE4402226C2 (de) * 1994-01-27 1997-11-06 Voith Gmbh J M Rakelvorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999060210A1 (fr) * 1998-05-20 1999-11-25 Valmet Corporation Appareil applicateur et procede de revetement par transfert de film

Also Published As

Publication number Publication date
US5788771A (en) 1998-08-04
CA2184516A1 (fr) 1997-03-02
DE19532388C1 (de) 1996-12-19
EP0761878B1 (fr) 2002-01-16
ATE212093T1 (de) 2002-02-15
DE59608587D1 (de) 2002-02-21
JPH09103731A (ja) 1997-04-22
ES2171582T3 (es) 2002-09-16
CA2184516C (fr) 2006-06-06
EP0761878A3 (fr) 1997-06-25

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