DE1652272C3 - Method and device for coating ribbons, in particular with photographic emulsions - Google Patents

Method and device for coating ribbons, in particular with photographic emulsions

Info

Publication number
DE1652272C3
DE1652272C3 DE19671652272 DE1652272A DE1652272C3 DE 1652272 C3 DE1652272 C3 DE 1652272C3 DE 19671652272 DE19671652272 DE 19671652272 DE 1652272 A DE1652272 A DE 1652272A DE 1652272 C3 DE1652272 C3 DE 1652272C3
Authority
DE
Germany
Prior art keywords
ruler
coating
emulsion
air
foundry
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
DE19671652272
Other languages
German (de)
Other versions
DE1652272B2 (en
DE1652272A1 (en
Inventor
Kurt 5670 Opladen Browatzki
Hans Dipl.-Ing. Dr. 5000 Koeln Gref
Peter Dipl.-Ing. Dr. Herzhoff
Guenther Dr. Koepke
Fritz Dr. 5000 Koeln Maus
Stephan Dipl.-Ing. Platz
Wolfgang Dipl.-Ing. Schweicher
Willi Dr. Madrid Schwenger
Willi Wasser
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.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
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
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of DE1652272A1 publication Critical patent/DE1652272A1/en
Publication of DE1652272B2 publication Critical patent/DE1652272B2/en
Application granted granted Critical
Publication of DE1652272C3 publication Critical patent/DE1652272C3/en
Expired legal-status Critical Current

Links

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
    • D21H25/16—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with a blast of vapour or gas, e.g. air knife
    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • 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
    • D21H5/007—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 with a blast of gas or vapour, e.g. air knife
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Casting Devices For Molds (AREA)

Description

3030th

Die Erfindung richtet sich auf ein Verfahren und eine Vorrichtung zum Beschichten von Bändern, insbesondere mit photographischen Emulsionen, wobei die Fertigbeschichtung mittels eines der Beschichlungsrichtung entgegenwirkenden tangentialen Luft- »tromes vorgenommen wird, der über ein spaltbildendes Lineal in einem Unterdruckraum einbläst, aus Welchem die Luft abgesaugt wird. Als diesbezügliche Vorrichtung eignet sich eine Begießungsvorrichtung, die mit einem Vorbeschichter ausgestattet ist, hinter dem ein Gießerlineal angeordnet ist und bei der zwischen Vorbeschichter und Gießerlineal ein mit einer Emulsionsrückführleitung und einer Luftabsaugleitung versehener Hohlraum angeschlossen ist.The invention is directed to a method and an apparatus for coating strips, in particular with photographic emulsions, the final coating by means of one of the coating direction counteracting tangential air »flows are carried out via a gap-forming Blowing a ruler into a negative pressure room, from which the air is sucked out. As related Device is a basting device, which is equipped with a precoater, behind which has a foundry ruler and between the precoater and the foundry ruler with a Emulsion return line and an air suction line provided cavity is connected.

Man war bisher von der Annahme ausgegangen, daß zum Erzielen einer einwandfreien Beschichtung der tangentiale Luftstrom in möglichst großer Entfernung vom Ort der Schichtbildung aus dem Hohlraum abgesaugt und dabei seine Geschwindigkeit erheblich verkleinert werden müsse. Es war deshalb üblich, den Hohlraum möglichst groß zu gestalten und den Luftstrom mit dem herablaulenden Schleier an überschüssiger Emulsion zu kreuzen, um den Luftstrom nicht zu brüsk umlenken zu müssen und um die angestrebie Geschwindigkeitsverkleinerung zu erzielen. Der Nachteil dieses Verfahrens war der erforderliche große Hohlraum, der eine relativ große und schwer zu handhabende Gießeinrichtung bedingt sowie die Schaum- und Blaschenbildung in der rückgeführten Emulsion. Wurde dieser zurückgeführte Anteil der aufzutragenden Emulsion wieder beigegeben, so traten mitunter Beschichtungsfehler wegen aufgeplatzter Luftblüschen auf.It was previously assumed that in order to achieve a perfect coating the tangential air flow at the greatest possible distance from the location of the layer formation from the cavity sucked off and its speed must be reduced considerably. It was therefore common practice that Make the cavity as large as possible and the air flow with the falling veil to excess To cross the emulsion so as not to have to divert the air flow too brusquely and to avoid the desired To achieve speed reduction. The disadvantage of this procedure was that it was required large cavity, which requires a relatively large and difficult to handle casting device as well as the Foam and bubble formation in the recirculated emulsion. Was this repatriated portion of the When the emulsion to be applied was added again, coating errors sometimes occurred due to cracked ones Air sacs on.

Es wurde nun überraschenderweise gefunden, daß diese Nachteile zu vermeiden sind, indem der Luftstrom erfindungsgemäß unmittelbar nach Passieren des Lineals umgelenkt und ohne weitere Berührung mit der abgeblasenen Emulsion abgeführt wird.It has now surprisingly been found that these disadvantages can be avoided by the air flow according to the invention deflected immediately after passing the ruler and without further contact is discharged with the blown emulsion.

Ir. der Seitenansicht der Maschine gesehen, gestattet dieses Verfahren eine lineare Verkleinerung der gesamten Begießvorrichtung etwa um das Zweieinhalbfache. Die Emulsionsrücklaufmenge kann unbesorgt wieder verwendet werden.Ir. seen from the side of the machine this method linearly shrinks the entire baster by about two and a half times. The emulsion return volume can be used again without any worries.

Bei der erfindung..gemäßen Vorrichtung zur Durchführung des Verfahrens besteht der Hohlraum aus zwei Kammern, die hinter dem Lineal angeordnet sind, von denen die zum Gießer hin liegende an die Emulsionsrückführleitung anschließt und die zweite Kammer über eine Einschnürung mit der ersteren in Verbindung steht und an die Luftabsaugleitung angeschlossen ist.In the device according to the invention for performing the method, there is a cavity from two chambers, which are arranged behind the ruler, of which the one facing the caster to the Emulsion return line connects and the second chamber via a constriction with the former in Connection is and is connected to the air suction line.

Durch diese Gestaltung wird erreicht, daß die Emulsion ungestört zurückfließen kann, da der Luftstrom aus ihrem Bereich vorher weggesaugt wird.This design ensures that the emulsion can flow back undisturbed because the air flow is sucked away from their area beforehand.

In einer Zeichnung sei nun das Wesen der Erfindung an einem Ausführungsbeispiel beschrieben:The essence of the invention will now be described using an exemplary embodiment in a drawing:

Das zu begießende Band 1 wird in Pfeilrichtung über die Walze 2 bewegt. Über den Zuflußstutzen 3 und das Vcrteilersystcm 4 wird die Emulsion zugeführt. Ein Teilstrom fließt über die hintere Überlaufkante 5 und den Stutzen 6 wieder ab. Der andere Teil wird in dem Vordosierkeil 7 zu einer Schicht vorgeformt, die aber dicker ist als die endgültig zu bildende Schicht. Die fertige Schicht wird an dem Spalt 8 zwischen dem Band 1 und dem sogenannten Gießerlineal 9 durch die Abstreifwirkung der tangential zum Band 1 in den unter Unterdruck stehenden Hohlraum 10, 12 einströmenden Abblaseluft gebildet. Die Luft wird unmittelbar hinter dem Lineal 9 umgelenkt und durch die Einschnürung U und die Kammer 12 durch den Anschlußstutzen 13 abgesaugt. Die abgeblasene Emuslion läuft nun ungestört in die Kammer 10 hinab und wird durch den Stutzen 14 abgeführt.The strip 1 to be doused is moved over the roller 2 in the direction of the arrow. Via the inflow connection 3 and the distribution system 4 is supplied with the emulsion. A partial flow flows over the rear overflow edge 5 and the nozzle 6 again. The other part is preformed into a layer in the pre-metering wedge 7, but it is thicker than the layer to be finally formed. The finished layer is at the gap 8 between the tape 1 and the so-called foundry ruler 9 by the stripping effect of the tangential to Band 1 formed in the underpressure cavity 10, 12 flowing in blow-off air. The air is deflected immediately behind the ruler 9 and through the constriction U and the chamber 12 through the connection piece 13 sucked off. The blown emuslion now runs down into the chamber 10 undisturbed and is discharged through the nozzle 14.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (2)

Patentansprüche:Patent claims: 1. Verfahren zum Beschichten von Bändern, insbesondere mit photographischen Emulsionen, wobei die Hertigbeschichtung mittels eines der Befchichtungsrichtung entgegenwirkenden tangentialen I.uftstromes vorgenommen wird, der über ein spaltbildendes Lineal in einen Unterdruckfaum einbläst, aus welchem die Luft abgesaugt Wird, dadurch gekennzeichnet, daß der Luftstrom unmittelbar nach Passieren des Lineals Ohne weitere Berührung mit der abgeblasenen Emulsion umgelenkt und abgeführt wird.1. Process for coating ribbons, in particular with photographic emulsions, wherein the Hertig coating by means of one of the coating direction counteracting tangential air flow is carried out, which over blows a gap-forming ruler into a vacuum tree, from which the air is sucked Is characterized in that the air flow immediately after passing the ruler Without further contact with the emulsion that has been blown off, it is deflected and discharged. 2. Vorrichtung zur Durchführung des Verfahrens. die mit einem Vorbeschichter ausgestattet ist, hinter dem ein Gießerlineal angeordnet ist und t»ei der zwischen Vorhcschichter und Gießerlineal ein mit einer Emulsionsrückführleitung und einer Luftabsaugleitung versehener Hohlraum angeschlossen ist, dadurch gekennzeichnet, daß der Hohlraum aus zwei Kammern (10, 12) besteht, die unter dem Lineal (9) angeordnet sind, von denen die zum Gießerspalt (7) hin liegende Kammer (10) an die Emuslionsrückführleitung(14) mit der ersten in Verbindung steht und an die Luftabsaugleitung (13) angeschlossen ist.2. Device for carrying out the method. which are equipped with a pre-coater is behind which a foundry ruler is arranged and partly the one between the preclayer and the foundry ruler a cavity provided with an emulsion return line and an air suction line is, characterized in that the cavity consists of two chambers (10, 12), which are arranged under the ruler (9), of which the chamber facing the casting gap (7) (10) to the emulsion return line (14) communicates with the first and to the air suction line (13) is connected.
DE19671652272 1967-02-24 1967-02-24 Method and device for coating ribbons, in particular with photographic emulsions Expired DE1652272C3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA0054997 1967-02-24

Publications (3)

Publication Number Publication Date
DE1652272A1 DE1652272A1 (en) 1971-01-21
DE1652272B2 DE1652272B2 (en) 1974-10-24
DE1652272C3 true DE1652272C3 (en) 1975-06-12

Family

ID=6939773

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19671652272 Expired DE1652272C3 (en) 1967-02-24 1967-02-24 Method and device for coating ribbons, in particular with photographic emulsions

Country Status (1)

Country Link
DE (1) DE1652272C3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19808159A1 (en) * 1998-02-27 1999-09-02 Agfa Gevaert Ag Device for coating curtains

Also Published As

Publication number Publication date
DE1652272B2 (en) 1974-10-24
DE1652272A1 (en) 1971-01-21

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
EF Willingness to grant licences
8339 Ceased/non-payment of the annual fee