EP0411196B1 - Coating apparatus - Google Patents
Coating apparatus Download PDFInfo
- Publication number
- EP0411196B1 EP0411196B1 EP89114450A EP89114450A EP0411196B1 EP 0411196 B1 EP0411196 B1 EP 0411196B1 EP 89114450 A EP89114450 A EP 89114450A EP 89114450 A EP89114450 A EP 89114450A EP 0411196 B1 EP0411196 B1 EP 0411196B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- counter
- roller
- coating
- ramp surface
- component
- 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
Links
- 239000011248 coating agent Substances 0.000 title claims description 63
- 238000000576 coating method Methods 0.000 title claims description 63
- 239000000463 material Substances 0.000 claims description 12
- 238000013459 approach Methods 0.000 claims description 7
- 239000011111 cardboard Substances 0.000 claims description 2
- 239000011087 paperboard Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000123 paper Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
Images
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
- 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
- B05C11/04—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 with blades
-
- 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
Definitions
- the invention relates to a coating device according to the preamble of claim 1.
- a coating device is known from US-A-33 02 610 [US-A-4 440 809 or US-A-4 250 211.]
- the object of the invention is to provide a coating device in which a much more uniform stroke application is achieved.
- the ramp surface directs the flow of the coating compound returning to the coating blade against the counter roller or web in a substantially linear region along the counter roller or web.
- the energy of this returning current has a comparative effect on the coating slip moving in the area of the material web, so that non-uniformities in this layer are considerably reduced when the doctor blade is scraped off.
- the fluctuations in the impulse forces caused by the coating mass which act on the coating blade are also substantially reduced.
- FIG. 1 shows a doctor blade arrangement with a doctor blade 48 at 44, all of the cut parts shown extending transversely to the counter-roller 22 at least over their entire length or width of the web 20.
- the doctor device is held on bar-shaped or strip-shaped holding elements 46a to 46e.
- the coating blade 48 is clamped at its lower end by a pressure hose 50 and the tip 52 of the coating blade is pressed against the counter roller 22 or web by the force of a pneumatic pressure hose 54.
- a strip-shaped component 56 is fastened to the beam part 46c by means of screws 58, which at the same time also fix a drainage channel 60.
- One of the doctor blades near surface 62 of component 56 deviates from this at an angle between 2 and 5 ° in the event that the doctor blade is unloaded to allow the doctor blade to deflect during operation.
- a surface 64a of the component 56 close to the coating blade and facing the counter roller 22 runs essentially parallel to the counter roller or approaches it at an angle of approximately 5 °.
- This is followed by a ramp surface 64b, which forms an angle between 120 and 150 °, in this case 135 °, with the first surface mentioned.
- This ramp surface 64b forms an angle b between 35 and 55 ° with the secant in the region of the counter roll where its projection hits the counter roll.
- the length l of this surface is approximately one fifth to two fifths of the length f of the surface 64a close to the coating blade.
- the length l of this other surface 64a is between 40 and 80 mm.
- the ramp surface 64b and the surface 64a mounted in front of it form a space 70 on the coating blade 48 and the counter-roller 22, in which in the region close to the counter-roller the coating compound in excess toward the coating blade and in the region remote from the counter-roller the excess coating material away from the coating blade flows as it is indicated by the arrows.
- the ramp surface 64b is adjoined by a surface 64c that stretches away from the counter roller at an angle between 32 and 55 ° and forms a hump 66 with a tip 68 with the ramp surface 64b. This tip 68 forms a gap parallel to the counter roller 68a.
- the coating slip is preferably applied to the material web by an application roller which rotates in a bath with coating slip and is not shown here.
- the conditions in the space 70 can be set so that there is no coating compound in their center, so that strong eddy currents cannot form here. These eddy currents are probably the reason for the streakiness of the applied stroke.
- the inclination of the ramp surface 64b and the distance of the Hump 66 or its tip 68 from the counter-roller or the inclination of the surface 64a close to the coating blade are dimensioned accordingly.
- the distance of the tip 68 from the counter roller is to be set between 3 and 15 mm, preferably between 5 and 10 mm.
- the angle between the two surfaces can be between 120 and 150 °, as indicated.
- the surface 64a of the component 56 close to the coating blade 48 is to be inclined so that the vertical line which is built thereon approximately in the middle region of this surface essentially or fairly exactly intersects the axis of the counter roller 22.
- FIG. 2 Another embodiment of the invention is described in FIG. 2, where the doctor device is designated by 84.
- the arrangement has a main beam support 86 on which the doctor blade 88 is clamped at its lower end by a pneumatic pressure hose 90, while a pneumatic pressure hose 92 presses the tip 94 of the doctor blade against the web or the counter roller 22.
- the already coated material web leads the coating slip in excess into a space 103 which is formed by a component 96 on the coating blade or the counter roller and the material web.
- first surface 98a close to the coating blade, facing the counter roller, for which the same conditions apply with respect to the counter roller or ramp surface 98b, as explained in relation to FIG. 1.
- a hump 100 with a tip 102 and a gap 102a is also formed here, as in the case of FIG. 1.
- the surfaces mentioned form a space 103 on the coating blade and the counter roller, in which the same flow conditions as explained in relation to FIG. 1 exist.
- the hump 100 is adjoined by a further surface 98c, here at an angle between 10 and 25 ° away from the counter-roller, to which another ramp surface 98d adjoins, which at an angle between 10 and 25 ° of the counter-roller away from approaches gap 102a.
- a hump 104 with a crest 106 is also created here.
- the second hump 104 is continued outwards in a round surface 98e. The effect already described for the first ramp surface is repeated on the second ramp surface 98d and the hump 104 or the tip 106 in a somewhat weaker form.
- FIG. 3 An arrangement is described in FIG. 3, in which the material web does not bring application mass into a pressurized application chamber 126, but the latter flows from a storage chamber through an outlet gap 124.
- the doctor device 108 is held on a support beam 110 and clamped at one end by a pneumatic pressure hose 114 between a wall 120 connected to the beam 110 and pressed against the mating roller 22 at the coating edge 116 by means of a further pneumatic pressure hose 118.
- the direction of movement of the web is indicated by arrow 24 as in the other figures.
- a front wall 122 is also indicated by the carrier device, to which a component 128, which delimits the pressurized application chamber 126 on the inlet side of the web, is fastened.
- This also has a ramp surface 132b facing the counter roller, which ends in a projection 136 which ends in a tip 134 forming a gap 137 on the counter roller in the region of the smallest distance from the counter roller.
- a surface 132a adjoins the application chamber 126 and, like the other figures, preferably forms an angle between 120 and 150 ° with the ramp surface 132b. The values already given for the other figures apply to the lengths and inclinations of these two surfaces.
- the coating slip is from a storage chamber via the outlet opening 124 the chamber 126 and thus the doctor blade 112 and thus the paper web. It is of course possible that the paper web, already coated with coating slip, runs into the application chamber 126.
- the application chamber 126 is completely filled with the coating slip and is under superatmospheric pressure.
- the gap 137 forms a liquid seal in order to maintain the excess pressure in the application chamber 126.
- a considerable amount of excess coating slip flows out here through the gap 137.
- the selected arrangement ensures uniform behavior when the coating slip emerges and thus also favorable conditions for a uniform wiping of the excess coating slip by the coating blade.
- the spreading of the coating slip from the gap 137 takes place practically in a narrow linear area, which is quite precisely delimited in the direction of web travel.
Description
Die Erfindung betrifft eine Streicheinrichtung entsprechend dem Oberbegriff des Patentanspruchs 1. Eine solche Streicheinrichtung ist bekannt aus der US-A-33 02 610 [US-A-4 440 809 oder US-A-4 250 211.]The invention relates to a coating device according to the preamble of claim 1. Such a coating device is known from US-A-33 02 610 [US-A-4 440 809 or US-A-4 250 211.]
Insbesondere bei Anordnungen nach der erstgenannten Veröffentlichung treten oft Streifen, wolkige Stellen oder andere Unregelmäßigkeiten in dem fertigen Strich auf. Dies umso mehr, als heute sehr hohe Bahngeschwindigkeiten bei der Beschichtung von Papier oder Karton zwischen 500 und 1200 m/min benutzt werden.Strips, cloudy spots or other irregularities often occur in the finished stroke, particularly in the case of arrangements according to the first-mentioned publication. All the more so since very high web speeds are used today when coating paper or cardboard between 500 and 1200 m / min.
Die Aufgabe der Erfindung ist es, eine Streicheinrichtung anzugeben, bei der ein sehr viel gleichmäßigerer Strichauftrag erzielt wird.The object of the invention is to provide a coating device in which a much more uniform stroke application is achieved.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst. Besonders vorteilhafte Maßnahmen gehen aus den Unteransprüchen 2 und 3 sowie 6 bis 9 hervor.This object is achieved by the features of the characterizing part of patent claim 1. Particularly advantageous measures can be found in subclaims 2 and 3 and 6 to 9.
Die Rampenfläche lenkt den zur Streichklinge rückkehrenden Strom der Streichmasse gegen die Gegenwalze bzw. Warenbahn in einem im wesentlichen linienförmigen Bereich entlang der Gegenwalze bzw. Warenbahn. Die Energie dieses rückkehrenden Stromes hat eine vergleichmäßigende Wirkung auf die im Bereich der Warenbahn sich bewegende Streichmasse, so daß Ungleichmäßigkeiten in dieser Schicht beim Abrakeln durch die Streichklinge wesentlich vermindert werden. Es werden auch die Schwankungen der Impulskräfte durch die Streichmasse, die auf die Streichklinge wirken, wesentlich verringert.The ramp surface directs the flow of the coating compound returning to the coating blade against the counter roller or web in a substantially linear region along the counter roller or web. The energy of this returning current has a comparative effect on the coating slip moving in the area of the material web, so that non-uniformities in this layer are considerably reduced when the doctor blade is scraped off. The fluctuations in the impulse forces caused by the coating mass which act on the coating blade are also substantially reduced.
Nachfolgend wird die Erfindung anhand der in den Figuren der Zeichnung dargestellten Ausführungsbeispiele erläutert; dabei stellt
- Fig. 1
- prinzipmäßig einen Querschnitt durch eine erste,
- Fig. 2
- einen ähnlichen Querschnitt durch eine zweite und
- Fig. 3
- einen wieder ähnlichen Querschnitt durch eine dritte Ausführungsform der erfindungsgemäßen Streicheinrichtung
- Fig. 1
- in principle a cross section through a first,
- Fig. 2
- a similar cross section through a second and
- Fig. 3
- again a similar cross section through a third embodiment of the coating device according to the invention
In Fig. 1 ist mit 44 eine Rakelanordnung mit einer Streichklinge 48 dargestellt, wobei sämtliche dargestellten, geschnittenen Teile sich quer zur Gegenwalze 22 mindestens uber deren gesamte Länge bzw. Breite der Warenbahn 20 erstrecken. Die Rakeleinrichtung ist gehalten an balken- bzw. leistenförmigen Halteelementen 46a bis 46e. Die Streichklinge 48 ist an ihrem unteren Ende durch einen Druckschlauch 50 festgeklemmt und die Spitze 52 der Streichklinge wird durch die Kraft eines pneumatischen Druckschlauchs 54 an die Gegenwalze 22 bzw. Warenbahn angepreßt. An dem Balkenteil 46c ist ein leistenförmiges Bauteil 56 mittels Schrauben 58 befestigt, welche gleichzeitig auch eine Ablaufrinne 60 festlegen. Eine der Streichklinge nahe Fläche 62 des Bauteils 56 weicht von dieser mit einem Winkel zwischen 2 und 5° für den Fall ab, daß die Streichklinge unbelastet ist, um eine Durchbiegung der Streichklinge im Betrieb zu ermöglichen.1 shows a doctor blade arrangement with a
Eine der Streichklinge nahe und der Gegenwalze 22 zugewandte Fläche 64a des Bauteils 56 verläuft im wesentlichen parallel zur Gegenwalze bzw. nähert sich dieser mit einem Winkel von etwa 5°. Daran schließt sich eine Rampenfläche 64b an, die mit der erstengenannten Fläche einen Winkel zwischen 120 und 150°, in diesem Fall 135° bildet. Diese Rampenfläche 64b bildet mit der Sekante in dem Bereich der Gegenwalze, wo ihre Projektion auf die Gegenwalze trifft, einen Winkel b zwischen 35 und 55°. Die Länge l dieser Fläche beträgt etwa ein Fünftel bis zwei Fünftel der Lange f der der Streichklinge nahen Fläche 64a. Die Länge l dieser anderen Fläche 64a beträgt zwischen 40 und 80 mm.A
Die Rampenfläche 64b und die davor gelagerte Fläche 64a bilden einen Raum 70 an der Streichklinge 48 und der Gegenwalze 22, in welchem im der Gegenwalze nahen Bereich die Streichmasse im Überschuß hin zur Streichklinge und im der Gegenwalze fernen Bereich der Überschuß an Streichmasse weg von der Streichklinge strömt, wie es durch die Pfeile angedeutet ist. Von dem Raum 70 wegstrebend schließt sich an die Rampenfläche 64b eine in einem Winkel zwischen 32 und 55° von der Gegenwalze wegstrebende Fläche 64c an und bildet mit der Rampenfläche 64b einen Buckel 66 mit einer Spitze 68. Diese Spitze 68 bildet einen zur Gegenwalze parallelen Spalt 68a. Durch die von der Rampe abgelenkte Überschußmenge der Streichmasse, die in diesem Spalt 68a auf die mit der Bahn in den Raum 70 eingeleitete Streichmasse trifft, wird eine Vergleichmäßigung der Schicht von Streichmasse an der Warenbahn herbeigeführt. Dabei wird vorzugsweise die Streichmasse auf die Warenbahn durch eine Auftragswalze aufgetragen, die in einem Bad an Streichmasse eintauchend umläuft und hier nicht dargestellt ist.The
Man kann die Verhältnisse in dem Raum 70 so einstellen, daß in ihrem Zentrum keine Streichmasse vorhanden ist, so daß sich hier starke Wirbelströmungen nicht ausbilden können. Gerade diese Wirbelströmungen sind wahrscheinlich ein Grund für Streifigkeit des aufgetragenen Striches. Man kann zu diesem Zweck die Neigung der Rampenflache 64b und die Entfernung des Buckels 66 bzw. dessen Spitze 68 von der Gegenwalze bzw. auch die Neigung der der Streichklinge nahen Fläche 64a entsprechend bemessen. Die Entfernung der Spitze 68 von der Gegenwalze ist zwischen 3 und 15 mm, vorzugsweise zwischen 5 und 10 mm anzusetzen. Der Winkel zwischen den beiden Flächen kann zwischen 120 und 150°, wie angegeben, betragen.The conditions in the space 70 can be set so that there is no coating compound in their center, so that strong eddy currents cannot form here. These eddy currents are probably the reason for the streakiness of the applied stroke. For this purpose, the inclination of the
Vorzugsweise ist die der Streichklinge 48 nahe Fläche 64a des Bauteils 56 so zu neigen, daß die Senkrechte, die man etwa im Mittelbereich dieser Fläche auf dieser errichtet, im wesentlichen oder ziemlich genau die Achse der Gegenwalze 22 schneidet.Preferably, the
In Fig. 2 ist eine andere Ausführungsform der Erfindung beschrieben, wo die Rakeleinrichtung mit 84 bezeichnet ist. Die Anordnung hat einen Hauptbalkenträger 86, an welchem die Streichklinge 88 an ihrem unteren Ende durch einen pneumatischen Druckschlauch 90 festgeklemmt ist, während ein pneumatischer Druckschlauch 92 die Spitze 94 der Streichklinge gegen die Warenbahn bzw. die Gegenwalze 22 druckt. Auch hier führt die bereits beschichtete Warenbahn die Streichmasse im Überschuß in einen Raum 103 hinein, der von einem Bauteil 96 an der Streichklinge bzw. der Gegenwalze und der Warenbahn gebildet ist. Es sind hier zwei Rampenflächen 98b und 98d vorhanden, wobei für die erstgenannte die zu Figur 1 erläuterten Bedingungen gelten. Es befindet sich weiterhin eine der Streichklinge nahe, der Gegenwalze zugewandte erste Fläche 98a hier wieder, für die die gleichen Verhältnisse in bezug auf die Gegenwalze bzw. die Rampenfläche 98b, wie zu Figur 1 erläutert, gelten. Es wird hier ebenfalls ein Buckel 100 mit einer Spitze 102 und einem Spalt 102a, wie im Fall von Figur 1, gebildet. Die genannten Flächen bilden an der Streichklinge und der Gegenwalze einen Raum 103, an welchem die gleichen Strömungsverhältnisse, wie zu Figur 1 erläutert, bestehen.Another embodiment of the invention is described in FIG. 2, where the doctor device is designated by 84. The arrangement has a
An den Buckel 100 schließt sich eine weitere, hier in einem Winkel zwischen 10 und 25° sich von der Gegenwalze entfernende Fläche 98c an, an die sich eine weitere Rampenfläche 98d anschließt, die sich in einem Winkel zwischen 10 und 25° der Gegenwalze weg von dem Spalt 102a nähert. Es entsteht hier auch ein Buckel 104 mit einer Kuppe 106. Der zweite Buckel 104 ist nach außen hin in einer runden Fläche 98e fortgesetzt. An der zweiten Rampenflache 98d und dem Buckel 104 bzw. der Kuppe 106 wiederholt sich in etwas schwächerer Form der bereits bei der ersten Rampenfläche geschilderte Effekt.The
In Fig. 3 ist eine Anordnung beschrieben, bei der nicht die Warenbahn Auftragsmasse in eine unter Druck stehende Auftragskammer 126 hineinbringt, sondern letzterer fließt diese von einer Vorratskammer durch einen Auslaßspalt 124 zu. Hier wird die Rakeleinrichtung 108 an einem Tragbalken 110 gehalten und durch einen pneumatischen Druckschlauch 114 an ihrem einen Ende zwischen einer mit dem Balken 110 verbundenen Wand 120 eingeklemmt und an der Streichkante 116 mittels einem weiteren pneumatischen Druckschlauch 118 an die Gegenwalze 22 angepreßt. Die Bewegungsrichtung der Bahn ist wie in den anderen Figuren mit dem Pfeil 24 angedeutet. Von der Trägereinrichtung ist noch eine vordere Wand 122 angedeutet, an der ein die unter Druck stehende Auftragskammer 126 an der Einlaufseite der Bahn begrenzendes Bauteil 128 befestigt ist. Dieses hat der Gegenwalze zugewandt ebenfalls eine Rampenfläche 132b, die in einem Buckel 136 endet, der in einer einen Spalt 137 an der Gegenwalze bildenden Spitze 134 im Bereich des geringsten Abstandes zur Gegenwalze endet. Zur Auftragskammer 126 hin schließt sich eine Fläche 132a an, die mit der Rampenfläche 132b ebenfalls wie bei den anderen Figuren vorzugsweise einen Winkel zwischen 120 und 150° bildet. Für die Längen und die Neigungen dieser beiden Flächen gelten die schon zu den anderen Figuren angegebenen Werte. Wie schon ausgeführt, wird bei dieser Streicheinrichtung die Streichmasse aus einer Vorratskammer über die Auslaßöffnung 124 der Kammer 126 und somit der Streichklinge 112 und somit der Papierbahn zugeführt. Es ist natürlich möglich, daß auch die Papierbahn schon mit Streichmasse beschichtet in die Auftragskammer 126 einläuft. Auf jeden Fall ist hier die Auftragskammer 126 voll mit der Streichmasse gefüllt und steht unter überatmosphärischem Druck. Hier bildet der Spalt 137 eine Flüssigkeitsdichtung, um den Überdruck in der Auftragskammer 126 aufrechtzuerhalten. Durch den Spalt 137 fließt hier eine erhebliche Menge an überschüssiger Streichmasse heraus. Durch die gewählte Anordnung wird jedoch hier ein gleichmäßiges Verhalten beim Austritt der Streichmasse und somit auch günstige Voraussetzungen für ein gleichmäßiges Abstreichen der Überschuß-Streichmasse durch die Streichklinge gewährleistet. Das Austreten der Streichmasse aus dem Spalt 137 erfolgt praktisch in einem engen linearen Bereich, der in Warenbahnlaufrichtung ziemlich genau begrenzt ist.An arrangement is described in FIG. 3, in which the material web does not bring application mass into a
Claims (9)
- Coating apparatus with a coating blade (48, 88), which is supported against a counter-roller (22), for coating travelling material webs, in particular of paper or cardboard, a component (56, 96) being provided, which closes off a chamber (70, 103) along the coating blade (48, 88) and the counter-roller (22) and comprises a ramp surface (64b, 98b) facing the counter-roller (22) and approaching the counter-roller as the distance from the spreading blade increases, which ramp surface forms a gap (68a, 102a) along the counter-roller parallel to its central axis, the gap (68a, 102a) also serving as an inlet opening for the chamber (70, 103) for the excess coating material already applied to the material web, characterised in that the ramp surface (64b, 98b) approaches the counter-roller except for 3 to 15 mm at an angle b of between 35 and 55°, the component (56, 96) comprises a surface (64a, 98a) extending from the coating blade up to the ramp surface (64b, 98b) and parallel to the axis of the counter-roller, which surface (64a, 98a) likewise defines the chamber (70, 103), the angle (a) between the two said surfaces (64a, 98a; 64b, 98b) amounting to between 120 and 150° and that the length (1) of the ramp surface (64b, 98b) amounts to one fifth to two fifths of the length (f) of the surface (64a, 98a) of the component (56, 96) closer to the coating blade (48, 88), respectively measured in the direction from the gap (68a, 102a) to the coating blade (48, 88).
- Coating apparatus according to Claim 1, characterised in that the ramp surface (64b, 98b) approaches the counter-roller except for a minimum gap of between 5 and 10 mm.
- Coating apparatus according to Claim 1 or 2, characterised in that the angle b between the ramp surface (64b, 98b) and the counter-roller amounts to between 40 and 50°.
- Coating apparatus according to one of Claims 1 to 3, characterised in that the ramp surface (64b, 98b) is part of a bulge (66) with a tip (68) of the component (56, 96) close to the counter-roller and the adjoining surface of the bulge as the third surface of the component facing the counter-roller extends away from the counter-roller at an angle of between 32 and 55°.
- Coating apparatus according to one of Claims 1 to 3, characterised by a second ramp surface (98d), which adjoins the bulge (102) and approaches the counter-roller at an angle (c) of between 10 and 25°, between the bulge (100) and the second ramp surface (98d), a fourth surface (98c) of the component (96), facing the counter-roller being provided, which - away from the bulge (100), extends away from the counter-roller at an angle of between 12 and 25°.
- Coating apparatus according to one of Claims 1 to 5, characterised in that the length (f) of the surface (64a, 98a) of the component (56, 96), which is close to the coating blade (48, 88) and faces the counter-roller, amounts to between 40 and 80 mm.
- Coating apparatus according to Claim 1, characterised in that the component (128) defines a pressurised application chamber (126) on the coating blade (112) and the counter-roller (22) of the inlet side of the material web, between the component (128) and the coating blade (112), a slot opening (124) emanating from a storage chamber for coating material, opening into the application chamber (126), the surface (132a) of the component closer to the coating blade than the ramp surface and facing the counter-roller (22) forming a channel (130) with counter-flow with respect to the direction of movement of the counter-roller, which terminates in an outlet gap (137) located on the counter-roller, at the end of the ramp surface (132b).
- Coating apparatus according to Claim 7, characterised in that the ramp surface (132b) approaches the counter-roller at an angle of between 37 and 55° except for a distance of between 3 and 15 mm.
- Coating apparatus according to Claim 8, characterised in that the ramp surface (132b), forming the outlet gap (137), approaches the counter-roller (22) except for a distance of between 5 and 10 mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89114450T ATE96866T1 (en) | 1989-08-04 | 1989-08-04 | STREAMING. |
| DE89114450T DE58906118D1 (en) | 1989-08-04 | 1989-08-04 | Coating device. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/127,399 US4859507A (en) | 1987-12-02 | 1987-12-02 | High speed paper coaters |
| CA000594506A CA1330740C (en) | 1987-12-02 | 1989-03-22 | High speed paper coaters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0411196A1 EP0411196A1 (en) | 1991-02-06 |
| EP0411196B1 true EP0411196B1 (en) | 1993-11-03 |
Family
ID=25672548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89114450A Expired - Lifetime EP0411196B1 (en) | 1987-12-02 | 1989-08-04 | Coating apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4859507A (en) |
| EP (1) | EP0411196B1 (en) |
| CA (1) | CA1330740C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6291017B1 (en) | 1996-03-06 | 2001-09-18 | Valmet Corporation | Method for coating a moving web with at least two coat layers |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5681618A (en) * | 1989-07-03 | 1997-10-28 | Consolidated Papers, Inc. | Method for applying coating to paper web including successive doctoring steps |
| FI100313B (en) * | 1991-05-09 | 1997-11-14 | Valmet Corp | Method and apparatus for coating mobile substrates |
| DE9109787U1 (en) * | 1991-08-07 | 1991-09-26 | J.M. Voith Gmbh, 7920 Heidenheim, De | |
| US5846325A (en) * | 1997-02-25 | 1998-12-08 | The Mead Corporation | Coating blade and method of using the same |
| DE19723458A1 (en) * | 1997-06-04 | 1998-12-10 | Voith Sulzer Papiermasch Gmbh | Device and method for applying a liquid or pasty medium to a moving surface |
| DE19843733A1 (en) * | 1998-09-24 | 2000-03-30 | Voith Sulzer Papiertech Patent | Wiper blade assembly coating paper or card bands with optionally-viscous liquid, employs system of leaf spring tensioning which forms ductor chamber and is readily replaced and adjusted |
| DE102004029565A1 (en) * | 2004-06-18 | 2006-01-05 | Voith Paper Patent Gmbh | doctor device |
| JP2006212407A (en) * | 2005-02-04 | 2006-08-17 | Fu Sheng Industrial Co Ltd | Structure of weight of golf club head |
| DE102005029613A1 (en) * | 2005-06-23 | 2007-01-04 | Voith Patent Gmbh | Device for metering and / or leveling |
| DE102018106428A1 (en) * | 2017-03-20 | 2018-09-20 | Horst Sprenger Gmbh Spezialwerkzeuge | Improvement on a doctor blade for applying material to a surface |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3302610A (en) * | 1963-10-10 | 1967-02-07 | Beloit Corp | Inverted trailing blade |
| US4310573A (en) * | 1980-07-31 | 1982-01-12 | Consolidated Papers, Inc. | Method and apparatus for supplying coating to a coater |
| US4369731A (en) * | 1981-09-02 | 1983-01-25 | Consolidated Papers, Inc. | Coating apparatus having an internal leveling blade |
| US4440809A (en) * | 1983-01-17 | 1984-04-03 | Consolidated Papers, Inc. | Method and apparatus for recirculating coating liquid in a paper coating apparatus |
| FI72904C (en) * | 1985-03-07 | 1987-08-10 | Waertsilae Oy Ab | ANORDINATION FOR DOUBLE BEARING WITH PAPER. |
-
1987
- 1987-12-02 US US07/127,399 patent/US4859507A/en not_active Expired - Fee Related
-
1989
- 1989-03-22 CA CA000594506A patent/CA1330740C/en not_active Expired - Fee Related
- 1989-08-04 EP EP89114450A patent/EP0411196B1/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6291017B1 (en) | 1996-03-06 | 2001-09-18 | Valmet Corporation | Method for coating a moving web with at least two coat layers |
Also Published As
| Publication number | Publication date |
|---|---|
| US4859507A (en) | 1989-08-22 |
| EP0411196A1 (en) | 1991-02-06 |
| CA1330740C (en) | 1994-07-19 |
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