EP0009588B1 - Device for the development of a flat diazocopy material by the semi-wet process - Google Patents

Device for the development of a flat diazocopy material by the semi-wet process Download PDF

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Publication number
EP0009588B1
EP0009588B1 EP79103032A EP79103032A EP0009588B1 EP 0009588 B1 EP0009588 B1 EP 0009588B1 EP 79103032 A EP79103032 A EP 79103032A EP 79103032 A EP79103032 A EP 79103032A EP 0009588 B1 EP0009588 B1 EP 0009588B1
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EP
European Patent Office
Prior art keywords
roll
applicator roll
roller
press
application
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Expired
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EP79103032A
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German (de)
French (fr)
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EP0009588A2 (en
EP0009588A3 (en
Inventor
Herbert Dr. Schröter
Artur Broze
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Hoechst AG
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Hoechst AG
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D5/00—Liquid processing apparatus in which no immersion is effected; Washing apparatus in which no immersion is effected
    • G03D5/06—Applicator pads, rollers or strips
    • G03D5/067—Rollers

Definitions

  • the invention relates to a development device for the development of flat diazo copying material by the semi-wet process with a rotatable application roller and a rotatable press roller pressing thereon, between which a development zone for the flat diazo copying material is formed, and with a press roller for exerting an additional pressure roller on the application roller acting force, wherein the load acting on the application roller is evenly distributed in the axial direction over the application roller and runs essentially in the main plane in which the roller axes lie.
  • the prior art includes a development device (DE-OS 2209865) in which three rollers are arranged in a row next to one another in a plane, the adjacent rollers coming into mutual contact.
  • the roller located at one end of the row is rotatably supported in bearings which are immobile in one position, and the other two rollers can be moved in the direction of the rollers adjacent to them or away from them.
  • means for exerting a pressure on the roller which lies at the other end of the row of the roller arrangement in relation to the stationary, rotatably mounted roller.
  • These means consist essentially in a pressure roller, which rests on the outside of a squeeze roller, and presses the squeeze roller and, via this, a rubber roller onto a counter-pressure roller.
  • the pressure roller exerts its pressure in the central area, seen in the axial direction, on the squeeze roller.
  • the pressure emanating from the pressure roller results in a deflection of the squeeze roller, the rubber roller and the counter-pressure roller over their length, the deflection plane coinciding with the main plane in which all the roller axes lie.
  • an application wick made of felt also acts as a means for applying and distributing the developer liquid. The application wick is pressed against the middle rubber roller by a spring so that an additional force component acts on it.
  • a development device for the development of flat diazo copying material by the semi-wet process with an arrangement of at least two rollers which can be rotated about a roller axis and are pressed against one another, between which a development zone for the flat diazo copying material to be developed is formed, with means for exerting an additional force on at least one of the two rollers and with means for applying and distributing developer liquid to one of the two rollers (DE-A-2 749 627).
  • the special feature of this development device is that, in order to exert an additional force, the deflection plane of one of the two rollers is laid outside the main plane in which the roller axes lie, such that a first line of intersection of the deflection plane with the jacket of this roller, from which the deflection runs in the direction of the roller axis, seen in the direction of rotation of the roller, lies in front of the passage nip.
  • the diazo copying material is brought into contact with the first guide means at a first transition line between the first cutting line and the development zone on this roller. Behind the development zone in front of the second line of intersection of the deflection plane with the jacket of this roller, from which the deflection is directed away from the roller axis, the diazo copying material is removed by second guide means at a second transition line.
  • the present invention is therefore based on the object of developing a development device of the type mentioned at the outset such that, in the case of an uncritical structure, in particular with regard to the point of application and the dimensioning of the forces acting on the rolls, with a small pressing force between the press roll and the application roll, a uniform application is made by Developer solution on the diazo copy material transported through the development zone is made possible.
  • the deformation of the press roll should be adapted to that of the application roll. For wrinkle-free transport and for reasons of constructive simplicity, only relatively small pressing forces should be provided in the development device.
  • the developer application With a relatively small force being applied to the application roller and the press roller, the developer application is so thin and uniform that additional drying of the developed diazo copying material is not possible necessary is.
  • the pressing pressure occurring in the passage gap is certainly so low that no wrinkling occurs.
  • the forces acting on the press roller are so great that they are sufficient to adapt their deformation over the entire length to that of the application roller. It is advantageous that the uniform application of the thin developer layer with a wrinkle-free passage of the diazo copying material through the development zone is achieved with an uncomplicated construction of the development device, in which all forces essentially run in the main plane in which the roller axes lie.
  • Particularly favorable development results with regard to a uniform application of a thin developer layer are achieved by dimensioning the development device such that the total force acting on the application roller, including its own weight, is in the range between 304.02 and 328.52 N (31 and 33.5 kp).
  • the uniform application of a thin layer of developer solution to the diazo copying material to be developed can also be influenced by the dimensioning of the pressure with which a metering lamella is applied to the application roller, the development facility provides for this that the line pressure with which the dosing lamella is applied the application roller presses to a size in the range between 0.147 N / cm and 0.461 N / cm (15 p / cm and 47 p / cm).
  • a line pressure of the metering lamella between 0.147-0.461 N / cm (15-31 p / cm) is provided.
  • 1 denotes a press roller, which is rotatably mounted in a rocker 2.
  • the rocker arm 2 is pivotable about a shaft 3.
  • the press roll lies centrally on a press roll 4, the press roll being pressed against an application roll 5.
  • the press roller is displaceably guided in the direction of the central connecting line between the press roller and the press roller and the application roller, which runs through the axes of the rollers.
  • the connecting line is the intersection of the main plane 1a with the drawing plane.
  • An approximately linear developer zone 6 is formed between the press roller 4 and the application roller 5, the line running perpendicular to the plane of the drawing.
  • the press roll core, the press roll with a grooved surface and a tube 7 of the application roll provided with a rubber jacket 8 are made of steel. In another embodiment, the press roller can also be smooth.
  • the jacket 8 of the application roller is made of relatively hard rubber with a hardness in the range between 40 and 50 Shore.
  • the press roller and the application roller can be rotated in the direction of the arrows 9, 10 and are driven for rotation by drive means, not shown.
  • the application roller is immersed in an open reservoir 11 which contains developer liquid.
  • the application roller is dimensioned in such a way that its length 1, its modulus of elasticity E and its moment of inertia J are in a specific relationship to one another, namely the expression assume a size of 4.39 - 10 -4 cm / N (43.1. 10 -4 cm / kp).
  • the design parameters for the application roller are so coordinated here that the specified size is achieved.
  • the press roll is designed so that its length 1, its modulus of elasticity E and its area moment of inertia J for printing the size is 1.32 10-3 cm / N (12.9 10 -3 cm / kp).
  • the forces determining the deflection are evenly distributed as a load in the axial direction over the roller in question.
  • a metering lamella 12 made of plastic (PVC) is pressed onto the jacket 8 of the application roller and is attached to a pivotable lamella carrier 13.
  • An external force K A acts on the application roller 5 in the direction of the main plane, which is composed of the weight of the press roller 4 and an additional force exerted on the press roller by the press roller 1.
  • a force K L exerted by the metering lamella 12 acts on the application roller essentially in the direction of the main plane.
  • the force that causes the deformation of the press roll is equal to the force K A.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)

Description

Die Erfindung betrifft eine Entwicklungseinrichtung zur Entwicklung von flächigem Diazokopiermaterial nach dem Halbfeuchtverfahren mit einer drehbaren Antragswalze und einer auf sie drükkenden drehbaren Presswalze, zwischen denen eine Entwicklungszone für das flächige Diazokopiermaterial gebildet ist, sowie mit einer Pressrolle zum Ausüben einer zusätzlichen über die Presswalze auf die Antragswalze wirkenden Kraft, wobei die auf die Antragswalze wirkende Last gleichmässig in axialer Richtung über die Antragswalze verteilt ist und im wesentlichen in der Hauptebene, in der die Walzenachsen liegen, verläuft.The invention relates to a development device for the development of flat diazo copying material by the semi-wet process with a rotatable application roller and a rotatable press roller pressing thereon, between which a development zone for the flat diazo copying material is formed, and with a press roller for exerting an additional pressure roller on the application roller acting force, wherein the load acting on the application roller is evenly distributed in the axial direction over the application roller and runs essentially in the main plane in which the roller axes lie.

Zum Stand der Technik gehört eine Entwicklungseinrichtung (DE-OS 2209865), in der drei Walzen in einer Reihe in einer Ebene nebeneinanderliegend angeordnet sind, wobei die benachbarten Walzen zur gegenseitigen Anlage gelangen. Die an einem Ende der Reihe liegende Walze ist in Lagern drehbar gelagert, die in einer Stellung unbeweglich sind, und die beiden anderen Walzen sind in Richtung auf die ihnen jeweils benachbarten Walzen bzw. von dieser weg bewegbar.The prior art includes a development device (DE-OS 2209865) in which three rollers are arranged in a row next to one another in a plane, the adjacent rollers coming into mutual contact. The roller located at one end of the row is rotatably supported in bearings which are immobile in one position, and the other two rollers can be moved in the direction of the rollers adjacent to them or away from them.

Um die Walzen insbesondere an der zwischen zwei Walzen vorgesehenen linienförmigen Entwicklungszone zusammenzupressen, sind Mittel zum Ausüben eines Drucks auf diejenige Walze vorgesehen, die zu der ortsfest angeordneten drehbar gelagerten Walze am anderen Ende der Reihe der Walzenanordnung liegt. Diese Mittel bestehen im wesentlichen in einer Andruckrolle, die an der Aussenseite einer Quetschwalze anliegt, und die Quetschwalze und über diese eine Gummiwalze auf eine Gegendruckwalze drückt. Dabei übt die Andruckrolle ihren Druck im Mittelbereich, in axialer Richtung gesehen, auf die Quetschwalze aus. Der von der Andruckrolle ausgehende Druck wirkt sich in einer Durchbiegung der Quetschwalze, der Gummiwalze und der Gegendruckwalze über deren Länge aus, wobei die Durchbiegungsebene mit der Hauptebene, in der sämtliche Walzenachsen liegen, zusammenfällt. - Mit der in der Mitte der Walzenanordnung liegenden Gummiwalze wirkt ferner ein Antragdocht aus Filz als Mittel zum Aufbringen und Verteilen der Entwicklerflüssigkeit zusammen. Der Auftragdocht wird durch eine Feder an die mittlere Gummiwalze angedrückt, so dass auf dieser eine zusätzliche Kraftkomponente einwirkt.In order to compress the rollers, in particular at the line-shaped development zone provided between two rollers, means are provided for exerting a pressure on the roller which lies at the other end of the row of the roller arrangement in relation to the stationary, rotatably mounted roller. These means consist essentially in a pressure roller, which rests on the outside of a squeeze roller, and presses the squeeze roller and, via this, a rubber roller onto a counter-pressure roller. The pressure roller exerts its pressure in the central area, seen in the axial direction, on the squeeze roller. The pressure emanating from the pressure roller results in a deflection of the squeeze roller, the rubber roller and the counter-pressure roller over their length, the deflection plane coinciding with the main plane in which all the roller axes lie. - With the rubber roller lying in the middle of the roller arrangement, an application wick made of felt also acts as a means for applying and distributing the developer liquid. The application wick is pressed against the middle rubber roller by a spring so that an additional force component acts on it.

Mit dieser bekannten Entwicklungseinrichtung wird zwar bei verhältnismässig geringen Papierbreiten ein gleichmässiger Antrag der Entwicklerflüssigkeit erzielt, jedoch läuft das flächige Diazokopiermaterial nicht immer faltenfrei durch die Auftragszone, welche die Entwicklungszone darstellt.With this known developing device, even application of the developer liquid is achieved with relatively small paper widths, but the flat diazo copying material does not always run wrinkle-free through the application zone, which represents the developing zone.

Bekannt istferner eine Entwicklungseinrichtung zur Entwicklung von flächigem Diazokopiermaterial nach dem Halbfeuchtverfahren mit einer Anordnung von wenigstens zwei um je eine Walzenachse drehbaren, gegeneinander gepressten Walzen, zwischen denen eine Entwicklungszone für das zu entwickelnde flächige Diazokopiermaterial gebildet ist, mit Mitteln zum Ausüben einer zusätzlichen Kraft auf mindestens eine der beiden Walzen sowie mit Mitteln zum Aufbringen und Verteilen von Entwicklerflüssigkeit auf eine der beiden Walzen (DE-A-2 749 627). Das Besondere dieser Entwicklungseinrichtung besteht darin, dass zum Ausüben einer zusätzlichen Kraft die Durchbiegungsebene einer der beiden Walzen derart ausserhalb der Hauptebene, in der die Walzenachsen liegen, verlegt ist, dass eine erste Schnittlinie der Durchbiegungsebene mit dem Mantel dieser Walze, von der aus die Durchbiegung in Richtung auf die Walzenachse verläuft, in Drehrichtung der Walze gesehen, vor dem Durchlaufspalt liegt. Das Diazokopiermaterial wird zwischen der ersten Schnittlinie und der Entwicklungszone auf dieser Walze mit ersten Führungsmitteln an einer ersten Übergangslinie zur Auflage gebracht. Hinter der Entwicklungszone vor der zweiten Schnittlinie der Durchbiegungsebene mit dem Mantel dieser Walze, von der aus die Durchbiegung von der Walzenachse weggerichtet ist, wird das Diazokopiermaterial durch zweite Führungsmittel an einer zweiten Übergangslinie entfernt.Also known is a development device for the development of flat diazo copying material by the semi-wet process with an arrangement of at least two rollers which can be rotated about a roller axis and are pressed against one another, between which a development zone for the flat diazo copying material to be developed is formed, with means for exerting an additional force on at least one of the two rollers and with means for applying and distributing developer liquid to one of the two rollers (DE-A-2 749 627). The special feature of this development device is that, in order to exert an additional force, the deflection plane of one of the two rollers is laid outside the main plane in which the roller axes lie, such that a first line of intersection of the deflection plane with the jacket of this roller, from which the deflection runs in the direction of the roller axis, seen in the direction of rotation of the roller, lies in front of the passage nip. The diazo copying material is brought into contact with the first guide means at a first transition line between the first cutting line and the development zone on this roller. Behind the development zone in front of the second line of intersection of the deflection plane with the jacket of this roller, from which the deflection is directed away from the roller axis, the diazo copying material is removed by second guide means at a second transition line.

Mit dieser Entwicklungseinrichtung kann auch grösseres flächiges Diazokopiermaterial faltenfrei durch die Entwicklungszone transportiert und in ihr entwickelt werden, jedoch sind in dieser Entwicklungseinrichtung die einwirkenden Kräfte und die Angriffspunkte dieser Kräfte bezüglich der Hauptebene genau zu wählen und abzustimmen, damit sich die gewünschten Verhältnisse einstellen.Larger flat diazo copying material can also be transported and developed in the development zone without wrinkles with this development device, however, the acting forces and the points of application of these forces with respect to the main plane must be selected and coordinated in this development device so that the desired conditions are established.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Entwicklungseinrichtung der eingangs genannten Art so weiterzubilden, dass bei unkritischem Aufbau, insbesondere hinsichtlich des Angriffspunktes und der Dimensionierung der auf die Walzen einwirkenden Kräfte, bei kleiner Presskraft zwischen der Presswalze und der Antragswalze ein gleichmässiger Antrag von Entwicklerlösung auf das durch die Entwicklungszone transportierte Diazokopiermaterial ermöglicht wird. Zu diesem Zweck soll die Verformung der Presswalze derjenigen der Antragswalze angepasst werden. Zum faltenfreien Transport und aus Gründen der konstruktiven Einfachheit sollen in der Entwicklungseinrichtung nur verhältnismässig kleine Presskräfte vorgesehen werden.The present invention is therefore based on the object of developing a development device of the type mentioned at the outset such that, in the case of an uncritical structure, in particular with regard to the point of application and the dimensioning of the forces acting on the rolls, with a small pressing force between the press roll and the application roll, a uniform application is made by Developer solution on the diazo copy material transported through the development zone is made possible. For this purpose, the deformation of the press roll should be adapted to that of the application roll. For wrinkle-free transport and for reasons of constructive simplicity, only relatively small pressing forces should be provided in the development device.

Diese Aufgabe ist für eine Entwicklungseinrichtung der eingangs genannten Gattung durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved for a development device of the type mentioned at the outset by the features specified in the characterizing part of claim 1.

Damit wird unter Aufbringung einer verhältnismässig kleinen Kraft auf die Antragswalze und die Presswalze ein so dünner gleichmässiger Entwicklerantrag erzielt, dass eine zusätzliche Trocknung des entwickelten Diazokopiermaterials nicht notwendig ist. Der in dem Durchlaufspalt auftretende Pressdruck ist dabei mit Sicherheit so gering, dass keine Faltenbildung auftritt. Die an der Presswalze wirkenden Kräfte sind so gross, dass sie ausreichen, um über die gesamte Länge ihre Verformung derjenigen der Antragswalze anzupassen. Vorteilhaft ist dabei, dass der gleichmässige Antrag der dünnen Entwicklerschicht bei faltenfreiem Durchlauf des Diazokopiermaterials durch die Entwicklungszone bei einem unkomplizierten Aufbau der Entwicklungseinrichtung, bei dem sämtliche Kräfte im wesentlichen in der Hauptebene verlaufen, in der die Walzenachsen liegen, erreicht wird.With a relatively small force being applied to the application roller and the press roller, the developer application is so thin and uniform that additional drying of the developed diazo copying material is not possible necessary is. The pressing pressure occurring in the passage gap is certainly so low that no wrinkling occurs. The forces acting on the press roller are so great that they are sufficient to adapt their deformation over the entire length to that of the application roller. It is advantageous that the uniform application of the thin developer layer with a wrinkle-free passage of the diazo copying material through the development zone is achieved with an uncomplicated construction of the development device, in which all forces essentially run in the main plane in which the roller axes lie.

Besonders günstige Entwicklungsergebnisse hinsichtlich eines gleichmässigen Antrags einer dünnen Entwicklerschicht werden durch solche Dimensionierung der Entwicklungseinrichtung erreicht, dass die an der Antragswalze angreifende Gesamtkraft einschliesslich ihres Eigengewichts in dem Bereich zwischen 304,02 und 328,52 N (31 und 33,5 kp) liegt.Particularly favorable development results with regard to a uniform application of a thin developer layer are achieved by dimensioning the development device such that the total force acting on the application roller, including its own weight, is in the range between 304.02 and 328.52 N (31 and 33.5 kp).

Da der gleichmässige Antrag einer dünnen Schicht Entwicklerlösung an das zu entwickelnde Diazokopiermaterial auch durch die Dimensionierung des Druckes beeinflusst werden kann, mit der eine Dosierlamelle an der Antragswalze anliegt, ist für diese in Weiterbildung der Entwicklungseinrichtung vorgesehen, dass der Linienpressdruck, mit der die Dosierlamelle an die Antragswalze drückt, auf eine Grösse in dem Bereich zwischen 0,147 N/cm und 0,461 N/cm (15 p/cm und 47 p/cm) eingestellt ist.Since the uniform application of a thin layer of developer solution to the diazo copying material to be developed can also be influenced by the dimensioning of the pressure with which a metering lamella is applied to the application roller, the development facility provides for this that the line pressure with which the dosing lamella is applied the application roller presses to a size in the range between 0.147 N / cm and 0.461 N / cm (15 p / cm and 47 p / cm).

Damit wird in vorteilhafter Weise eine gleichmässige Anlage der Dosierlamelle an der Antragswalze erzielt, wodurch der Entwicklerantrag ebenfalls gleichmässig in einer zur Entwicklung ausreichenden, aber nicht zu grossen Menge erfolgt. Dabei wird die Lamelle nicht so stark verformt, dass die Gleichmässigkeit des Entwicklerantrags gefährdet ist.This advantageously achieves a uniform contact of the metering lamella on the application roller, as a result of which the developer application is also made uniformly in an amount which is sufficient for development but not too large. The slat is not deformed so much that the uniformity of the developer application is jeopardized.

In besonders günstiger Dimensionierung ist ein Linienpressdruck der Dosierlamelle zwischen 0,147-0,461 N/cm (15-31 p/cm) vorgesehen.In a particularly favorable dimensioning, a line pressure of the metering lamella between 0.147-0.461 N / cm (15-31 p / cm) is provided.

Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand einer Zeichnung dargestellt, in der die wesentlichen Teile der Entwicklungseinrichtung in einer Seitenansicht - nicht massstäblich - dargestellt sind.An embodiment of the invention is shown below with reference to a drawing, in which the essential parts of the development device are shown in a side view - not to scale.

In der Zeichnung ist mit 1 eine Pressrolle bezeichnet, die in einer Schwinge 2 drehbar gelagert ist. Die Schwinge 2 ist um eine Welle 3 schwenkbar. Die Pressrolle liegt mittig auf einer Presswalze 4 auf, wobei die Presswalze gegen eine Antragswalze 5 gedrückt wird. Hierzu ist die Presswalze in Richtung der durch die Achsen der Walzen verlaufenden mittleren Verbindungslinie zwischen der Pressrolle und der Presswalze und der Antragswalze verschiebbar geführt. Die Verbindungslinie ist die Schnittlinie der Hauptebene 1a mit der Zeichenebene.In the drawing, 1 denotes a press roller, which is rotatably mounted in a rocker 2. The rocker arm 2 is pivotable about a shaft 3. The press roll lies centrally on a press roll 4, the press roll being pressed against an application roll 5. For this purpose, the press roller is displaceably guided in the direction of the central connecting line between the press roller and the press roller and the application roller, which runs through the axes of the rollers. The connecting line is the intersection of the main plane 1a with the drawing plane.

Zwischen der Presswalze 4 und der Antragswalze 5 wird eine annähernd linienförmige Entwicklerzone 6 gebildet, wobei die Linie senkrecht zur Zeichenebene verläuft. Der Pressrollenkern, die mit gerillter Oberfläche ausgeführte Presswalze sowie ein Rohr 7 der mit einem Gummimantel 8 versehenen Antragswalze bestehen aus Stahl. Die Presswalze kann in einer anderen Ausführungsform auch glatt sein. Der Mantel 8 der Antragswalze ist aus relativ hartem Gummi mit einer Härte in dem Bereich zwischen 40 und 50 Shore ausgeführt.An approximately linear developer zone 6 is formed between the press roller 4 and the application roller 5, the line running perpendicular to the plane of the drawing. The press roll core, the press roll with a grooved surface and a tube 7 of the application roll provided with a rubber jacket 8 are made of steel. In another embodiment, the press roller can also be smooth. The jacket 8 of the application roller is made of relatively hard rubber with a hardness in the range between 40 and 50 Shore.

Die Presswalze und die Antragswalze sind in Richtung der Pfeile 9, 10 drehbar und werden zur Drehung durch nichtdargestellte Antriebsmittel angetrieben.The press roller and the application roller can be rotated in the direction of the arrows 9, 10 and are driven for rotation by drive means, not shown.

Die Antragswalze taucht in einen offenen Vorratsbehälter 11 ein, der Entwicklerflüssigkeit enthält.The application roller is immersed in an open reservoir 11 which contains developer liquid.

Die Antragswalze ist so dimensioniert, dass ihre Länge 1, ihr Elastizitätsmodul E und ihr Trägheitsmoment J in einem bestimmten Verhältnis zueinander stehen, und zwar soll der Ausdruck

Figure imgb0001
eine Grösse von 4,39 - 10-4 cm/N (43,1 . 10-4 cm/kp) annehmen. Die Konstruktionsparameter für die Antragswalze sind also hier so aufeinander abgestimmt, dass die angegebene Grösse erreicht wird.The application roller is dimensioned in such a way that its length 1, its modulus of elasticity E and its moment of inertia J are in a specific relationship to one another, namely the expression
Figure imgb0001
 assume a size of 4.39 - 10 -4 cm / N (43.1. 10 -4 cm / kp). The design parameters for the application roller are so coordinated here that the specified size is achieved.

Die Presswalze ist so konstruiert, dass ihre Länge 1, ihr Elastizitätsmodul E und ihr Flächenträgheitsmoment J für den Ausdruck

Figure imgb0002
die Grösse 1.32 10-3 cm/N (12.9 10-3 cm/kp) ergibt.The press roll is designed so that its length 1, its modulus of elasticity E and its area moment of inertia J for printing
Figure imgb0002
 the size is 1.32 10-3 cm / N (12.9 10 -3 cm / kp).

Damit ist je eine die Durchbiegung der Antragswalze und der Presswalze bestimmende Grösse festgelegt. Die die Durchbiegung bestimmenden Kräfte sind als Last gleichmässig in axialer Richtung über die jeweils betrachtete Walze verteilt.This defines a size that determines the deflection of the application roller and the press roller. The forces determining the deflection are evenly distributed as a load in the axial direction over the roller in question.

An den Mantel 8 der Antragswalze wird eine Dosierlamelle 12 aus Kunststoff (PVC) gedrückt, die an einem schwenkbaren Lamellenträger 13 befestigt ist.A metering lamella 12 made of plastic (PVC) is pressed onto the jacket 8 of the application roller and is attached to a pivotable lamella carrier 13.

Auf die Antragswalze 5 wirkt eine äussere Kraft KA in Richtung der Hauptebene, die sich aus dem Gewicht der Presswalze 4 und einer durch die Pressrolle 1 auf die Presswalze zusätzlich ausgeübten Kraft zusammensetzt. Ausserdem wirkt im wesentlichen in Richtung der Hauptebene eine durch die Dosierlamelle 12 ausgeübte Kraft KL auf die Antragswalze.An external force K A acts on the application roller 5 in the direction of the main plane, which is composed of the weight of the press roller 4 and an additional force exerted on the press roller by the press roller 1. In addition, a force K L exerted by the metering lamella 12 acts on the application roller essentially in the direction of the main plane.

Die Kraft, die die Verformung der Presswalze verursacht, ist gleich der Kraft KA.The force that causes the deformation of the press roll is equal to the force K A.

Claims (4)

1. Developing apparatus for developing a flat diazotype material according to the semi-dry process, comprising a rotatable applicator roll and a rotatable press roll pressing on the applicator roll, whereby a developing zone for the flat diazotype material is formed between the two rolls, further comprising a pressing roller to exert an additional force, via the press roll, on the applicator roll, the load acting on the applicator roll being uniformly distributed in axial direction across the applicator roll and substantially extending in the principal plane, in which the shafts of the rolls lie, characterized in that the uniformly distributed load acting on the applicator roll (5) and combined of partial forces, namely a force exerted by the pressing roller (1) on the press roll (4), the weight of the press roll (4) and the own weight of the applicator roll (5) is in the range between 264,87 N (27 kp) and 403,44 N (41 kp), and further characterized in that the determinative relationship
Figure imgb0004
for the bending of the press roll (4) and the applicator roll (5) under uniform distribution of load on each roll, results in 1,32 10-3 cm/N (12,9 10-3 cm/kp) for the press roll (4) and 4,39 ·10-4 cm/N (43,1 · 10-4 cm/kp) for the applicator roll (5), with I being the length, E the modulus of elasticity of the material and J the geometrical moment of inertia of the press roll and of the applicator roll, respectively.
2. Developing apparatus according to claim 1, characterized in that the load distributed over the applicator roll (5) is in the range between 304,00 and 328,52 N (31 and 33,5 kp).
3. Developing apparatus according to claim 1, comprising a dosing bar resting against the applicator roll, characterized in that the amount of line pressure exerted by the dosing bar (12) on the applicator roll (5) is in the range between 0,147 N/cm (15 p/cm) and 0,461 N/cm (47 p/cm).
4. Developing apparatus according to claim 3, characterized in that the amount of line pressure of the dosing bar (12) is 0,147-0,304 N/cm (15-31 p/cm).
EP79103032A 1978-08-28 1979-08-20 Device for the development of a flat diazocopy material by the semi-wet process Expired EP0009588B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2837535 1978-08-28
DE19782837535 DE2837535A1 (en) 1978-08-28 1978-08-28 DEVELOPMENT DEVICE FOR DEVELOPING AREA DIAZOCOPY MATERIAL BY THE SEMI-WET PROCESS

Publications (3)

Publication Number Publication Date
EP0009588A2 EP0009588A2 (en) 1980-04-16
EP0009588A3 EP0009588A3 (en) 1980-04-30
EP0009588B1 true EP0009588B1 (en) 1983-01-12

Family

ID=6048101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103032A Expired EP0009588B1 (en) 1978-08-28 1979-08-20 Device for the development of a flat diazocopy material by the semi-wet process

Country Status (3)

Country Link
EP (1) EP0009588B1 (en)
JP (1) JPS5562455A (en)
DE (2) DE2837535A1 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2729523C2 (en) * 1977-06-30 1979-03-15 Hoechst Ag, 6000 Frankfurt Development device for the development of diazo copy material according to the semi-wet process

Also Published As

Publication number Publication date
EP0009588A2 (en) 1980-04-16
EP0009588A3 (en) 1980-04-30
DE2964484D1 (en) 1983-02-17
DE2837535A1 (en) 1980-03-20
JPS5562455A (en) 1980-05-10

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