EP0000175A1 - Dispositif de développement d'un matériau de diazocopie par le procédé semi-humide - Google Patents

Dispositif de développement d'un matériau de diazocopie par le procédé semi-humide Download PDF

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Publication number
EP0000175A1
EP0000175A1 EP78100208A EP78100208A EP0000175A1 EP 0000175 A1 EP0000175 A1 EP 0000175A1 EP 78100208 A EP78100208 A EP 78100208A EP 78100208 A EP78100208 A EP 78100208A EP 0000175 A1 EP0000175 A1 EP 0000175A1
Authority
EP
European Patent Office
Prior art keywords
roller
press
lamella
application
roll
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
EP78100208A
Other languages
German (de)
English (en)
Other versions
EP0000175B1 (fr
Inventor
Horst Dipl.-Ing. Witte
Arthur Broze
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.)
Hoechst AG
Original Assignee
Hoechst 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 Hoechst AG filed Critical Hoechst AG
Publication of EP0000175A1 publication Critical patent/EP0000175A1/fr
Application granted granted Critical
Publication of EP0000175B1 publication Critical patent/EP0000175B1/fr
Expired legal-status Critical Current

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Classifications

    • 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 developing diazo copying material by the semi-wet process according to the preamble of claim 1.
  • a development device of the type mentioned at the outset is known (DE-OS 22 09 865), which is constructed with three rolls arranged parallel to one another in a row and rotatable under mutual contact of adjacent rolls.
  • the roller located at one end of the row is rotatably mounted in bearings which are immovably fixed in one position, and the other two of the three rollers can be moved in the direction of the rollers adjacent to them or away from them.
  • a device is provided for exerting a pressure on the roller which lies at the other end of the row of the roller arrangement with respect to the roller which is mounted so that it can rotate in a stationary manner.
  • the means for applying and distributing the developer liquid interact with the roller lying in the middle of the roller arrangement.
  • an application wick made of felt is used as a means of applying and distributing the developer liquid, which is immersed in a trough with the developer liquid and which is pressed on the other hand by a spring against the middle roller (rubber roller) made, for example, of rubber.
  • the roller arrangement comprises in particular a counter-pressure roller which is mounted so that it can rotate in a stationary manner.
  • a squeeze roller like the rubber roller, can be displaced in the direction of the counter-pressure roller.
  • a pressure roller arranged in series with the roller arrangement which can also be referred to as a pressure roller, lies against the squeeze roller on the outside of the row and presses the squeeze roller and, via this, the rubber roller onto the counterpressure roller.
  • the pressure roller exerts its pressure in the central area of the circumferential surface of the nip roller.
  • the pressure emanating from the pressure roller also has an even effect over their length if the squeeze roller, the rubber roller and the counter-pressure roller deflect, provided these rollers have sufficient strength.
  • This arrangement with a small working width is based on the knowledge that even if an unevenly distributed pressure is exerted on the nip roller by the pressure roller, the three rollers - Squeeze roller, rubber roller and counter-pressure roller - the developer liquid is evenly applied to the circumference of the rubber roller because the developer liquid collects like a meniscus at the contact line between the rubber roller and the squeeze roller. There is an even pressure distribution along the contact line between the rubber roller and the counter-pressure roller when the pressure is transferred via the squeeze roller and the rubber roller. - The felt wick strip against the rubber roller is pressed against the rubber roller under a uniform pressure over the entire length of the rubber roller.
  • US Pat. No. 3,626,833 also includes a two-roller arrangement with a lower roller, some of which contains developer liquid in a bath for receiving it Liquid is immersed, with an application roller lying above it, against which a metering lamella is pressed, and which is only used to transfer the developer liquid which is taken up by the lower roller and metered by the lamella onto the diazo copying material to be developed.
  • This diazo copying material runs between the upper roller, which is provided with a rubber coating for the adhesion of the developer liquid, and a pressure lamella which presses on the application roller from above.
  • the pressure is approximately the same across the width of the printing lamella and the application roller, but the pressure lamella tends to disrupt the synchronous running of the diazo copying material through the developing device, so that the throughput speed of the diazo copying material through the developing device no longer corresponds to the constant speed at which the diazo copy material is to be transported through the entire copier.
  • the otherwise known press roller is used, so that replacing the pressure lamella with a pressure roller would lead to a relatively complex three-roller system which would be difficult to dimension for the requirements in the semi-moisture development.
  • the present semi-moist process is intended in particular for the development of two-component diazo material with an alkaline liquid which contains a proportion of an aliphatic amine.
  • one-component diazo material can also be developed in this way that only contains rapidly coupling diazonium compounds.
  • a solution of an azo coupling component in a pre-metered amount of approximately 1.5 to 4.5 cm 3 / m 2 is to be supplied to the diazo layer (DE-OS 23 25 579).
  • the solution of the azo coupling component can have a pH of around 14.
  • the present invention is based on the task of creating a development device for diazo copying material up to DIN AO and larger, while avoiding the disadvantages of the devices discussed above, which makes it possible to develop developer liquid evenly and with minimal effort and with as little effort as possible Apply quantity to the diazo copy material to be developed.
  • This development device has the advantage that a very thin and uniform layer can be applied to the diazo copy material to be developed with a two-roll mill comprising an applicator roll and a press roll, between which large width diazo copy material can be transported.
  • a third roll can be omitted in order to equalize the pressure along the contact line or across the width of the rolls. It has It has also been shown that for certain aqueous developers, the arrangement consisting of two rollers and a press roller could be adjusted perfectly to the desired application quantity in the range between 3 and 5 grams / m 2 in connection with a lamella adjacent to the application roller during a suitable dimensioning A three-roll system encounters much greater difficulties.
  • the two-roll system proposed here also has the significant advantage that, despite the small but uniform application of aqueous development solution, no pinch folds are formed in a large speed range when the diazo copying material to be developed is run through. Good results were achieved when running through format sheets up to DIN A0, entered lengthways or crossways.
  • the essence of the present invention is therefore that for the development of diazo copying material by the semi-wet process, a two-roller system consisting of an applicator roller for metering and simultaneous application preferably.aqueous development liquid to the diazo copying material and a press roller for producing it. required pressure along the contact line of both rollers to which the developer liquid is applied, as well as a single press roller, which is in the center of the press roller - or several press rollers with equivalent equivalent action - in connection with such dimensioning of the equatorial moments of inertia J 2 of the press roller and J the application roller is provided that the deflections of these rollers are the same and uniform pressure along their contact zone prevails.
  • the moments of inertia are related the equatorial moment of inertia J 2 of the press roll is measured according to this relationship after the equatorial moment of inertia J 3 of the application roll has been determined.
  • the area moment of inertia J 3 is determined according to the outer diameter - in the case of a hollow roller also the inner diameter - of the applicator roller, these diameters being determined by calculation or experiment according to the desired pressure between the press roller and the applicator roller and the deformation permitted in the process.
  • the desired pressure in the contact line requires, in addition to the weight of the press roll, a specific feed force exerted by the press roll on the press roll, which enters into the relationship given above for the area moment of inertia J 2 .
  • the sum of the components of the Z partial forces of the lamella for metering the developer liquid running on the applicator roll in the direction of the connecting line of the axes of the press roll and application roll must be taken into account.
  • the feed force of this lamella is adjusted in accordance with the amount of developer liquid to be applied.
  • the latter are preferably dimensioned such that there are small or equally large and rectified deflections for the press and application roller.
  • the press roll deflection can be influenced by the direction of action of the feed force of the press roll; the application roller deflection by the point of attack and the direction of action of the metering force and the frictional force.
  • the inclination of the main plane is also determined by the specification that the copy material coating should be at the bottom and the desired direction of travel of the copy material.
  • the development device has the features that the application roll with a liquid-adsorbing elastic covering is provided and that the press roller has a grooved hard surface.
  • the amount of liquid to be applied to the diazo copying material is measured in accordance with the delivery pressure of the lamella provided for dosing and the surface roughness or the properties of the elastic covering. This amount is practically completely transferred to the diazo copying material by the back pressure of the hard press roll without the formation of a meniscus-like liquid jam in the contact line.
  • the lamella is preferably dimensioned such that the deflection at the contact line of the lamella on the application roller is equal to the deflection of the application roller at this point.
  • This dimensioning can be achieved particularly expediently in such a way that a lamella carrier carrying the lamella is provided with a tensioning rail with which a uniform contact pressure can be set along the contact line of the lamella on the application roller running in the axial direction.
  • the bracing rail is fastened at two ends opposite in the direction of the contact line and can be adjusted in the middle between the two ends by a screw in its distance from the plate carrier.
  • the development device is preferably designed by such an arrangement of the directions of engagement of the feed force of the press roller on the application roller and the feed force of the lamella that the deflections of the press roller and the application roller in the direction of the passage gap are perpendicular to the direction of the main plane in which the axes of the press roller and the application roller are almost zero.
  • a variant of this development device is appropriately dimensioned so that the deflection of the press roll and the deflection of the application roller in the direction of the passage gap are rectified and the same size.
  • a plurality of pressure or pressure rollers can be provided in the central region of the pressure roller, which exert approximately a point load on the pressure roller. In this case, the pressure between the individual press roll and the press roll is reduced, but the specified dimensioning of the area moment of inertia of the press roll still applies with good approximation in order to achieve constant deflections and pressures along the contact line on the application roll.
  • FIG. 1 denotes a press roller which, as shown in FIG. 2, lies centrally on a press roller 2.
  • the roller arrangement is completed by an application roller 3, against which a metering lamella 4 presses.
  • a torque M do is exerted on the press roller 1, which is rotatably mounted about the bearing 6 via a rocker 5, which together with the weight of the press roll the feed force P 1 at the contact point 7 between the press roller and the press roller.
  • the steel press roll 2 has a grooved surface.
  • the press roller is supported along the contact line 10 on the application roller.
  • the application roller is constructed as a hollow roller with a roller core 11 made of steel and a liquid-adsorbing coating 12, for example made of rubber.
  • the application roller is rotatably mounted in the fixed bearings 13, 14, in such a way that the coating is immersed in a developer liquid 16 contained in a container 15.
  • the developer quantity taken up in the container 15 by the application roller driven in the direction of rotation of the arrow 17 is metered by the metering lamella 4, which extends over the contact line 20 of the application roller.
  • the lamella consists of plastic or steel coated with plastic and is fastened along its length to a lamella carrier 18 by means of a terminal strip, not shown.
  • the lamella can be pivoted together with the lamella carrier around two fixedly arranged bearings, of which the bearing 19 is shown schematically in FIG. 1.
  • The. Lamella presses the total force P 4 obliquely from below against the application roller along the contact line 20.
  • Fig. 1 there are also three dash-dotted lines are recognizable, which indicate surfaces perpendicular to the plane of the drawing.
  • a line represents the main plane 21 in which the axes 22 and 23 of the press roll and the application roll lie.
  • the main plane 21 includes the angle of inclination ⁇ 2 to the vertical plane 24.
  • the axis 22 of the press roller and the axis 26 of the press roller lie in the plane 25 indicated by a line.
  • the angle between the direction of the feed force P 1 and the main plane is denoted by ⁇ 1 .
  • the angle 'between the weight vector G 3 and the main plane is called ⁇ 3 .
  • Fig. 1 also shows the transport plane 27, which is oriented at right angles to the plane 21 in the passage nip 20a of the press roll and the application roll.
  • the narrowest point of the passage gap is the contact line 10.
  • a preferred roller arrangement according to FIG. 1 has the following data, the equatorial moments of inertia being matched to one another in accordance with the specified dimensioning rule:
  • the press roller is matched to the application roller, taking into account the specified data, so that its deflection becomes the same as the deflection of the application roller:
  • the component of the weight G 2 of the press roll in the y-direction is 90.9 N and thus the required feed force component in the y-direction is 278.7 N.
  • the embodiment according to FIG. 3 differs from that according to FIGS. 1 and 2 essentially in that the metering lamella 4 presses from above onto the application roller in order to exert a force component in the y-direction on the application roller, which corresponds to the corresponding force component in Fig. 1 is directed opposite.
  • the axes 22, 23, 26 of the rollers and the press roller lie in the main plane.
  • FIG. 3 and more precisely FIG. 4 show a lamella carrier 28 which is provided with a stiffening strip 4a and a bracing rail 29.
  • the bracing rail is screwed to the plate carrier at both outer ends, while the center of the plate carrier exerts an additional force on the plate by the screw 30 which can be rotated in the clamping rail. This makes it particularly easy to adjust the slat so that its deflection is equal to the deflection of the application roller at the contact line 31.
  • the cross section of the lamellar carrier can be kept relatively small. This measure reverses the direction of deflection.
  • Fig. 5 shows a third embodiment in which copying material with a top coating is developed.
  • the application roller 3 is arranged above the press roller 2, while the press roller 1 is pressed obliquely from below onto the press roller.
  • the application roller is uniformly supplied with developer fluid via a perforated feed line 32, from which the developer liquid flows onto the metering lamella, which presses diagonally below the application roller.
  • the application roller, the metering lamella and the perforated feed line are accommodated here in an upper housing part 33, which also serves as a collecting trough for the developer liquid.
  • the transport plane 27 for the diazo copy material to be developed runs between the upper housing part 33 and a lower housing part 34 and between the press roller and the application roller.
  • the equatorial moment of inertia J 3 of the application roller is also determined here according to the design rule according to the invention, with a sign reversal for some of the forces having to be taken into account with regard to the configuration of the rollers.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
EP78100208A 1977-06-30 1978-06-21 Dispositif de développement d'un matériau de diazocopie par le procédé semi-humide Expired EP0000175B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2729523 1977-06-30
DE2729523A DE2729523C2 (de) 1977-06-30 1977-06-30 Entwicklungseinrichtung zur Entwicklung von Diazokopiermaterial nach dem Halbfeuchtverfahren

Publications (2)

Publication Number Publication Date
EP0000175A1 true EP0000175A1 (fr) 1979-01-10
EP0000175B1 EP0000175B1 (fr) 1980-01-09

Family

ID=6012777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100208A Expired EP0000175B1 (fr) 1977-06-30 1978-06-21 Dispositif de développement d'un matériau de diazocopie par le procédé semi-humide

Country Status (5)

Country Link
US (1) US4155637A (fr)
EP (1) EP0000175B1 (fr)
JP (1) JPS5414235A (fr)
DE (2) DE2729523C2 (fr)
HU (1) HU178013B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8154145B2 (en) 2007-08-10 2012-04-10 Gunter Krauss Flow energy installation

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2749627A1 (de) * 1977-11-05 1979-05-10 Hoechst Ag Entwicklungseinrichtung zur entwicklung von flaechigem diazokopiermaterial nach dem halbfeuchtverfahren
DE2837535A1 (de) * 1978-08-28 1980-03-20 Hoechst Ag Entwicklungseinrichtung zur entwicklung von flaechigem diazokopiermaterial nach dem halbfeuchtverfahren
DE3066396D1 (en) * 1979-09-13 1984-03-08 Agfa Gevaert Nv Apparatus for applying a processing liquid to a sheet or web material
ATE35830T1 (de) * 1983-10-07 1988-08-15 Triatex International Vorrichtung und verfahren zum aufbringen geregelter mengen an flotte auf eine aufnahmefaehige materialbahn.
DE3815538A1 (de) * 1988-05-06 1989-11-16 Hoechst Ag Verfahren zum herstellen von farbbildern
US5743964A (en) * 1995-01-24 1998-04-28 Fata Hunter, Inc. Roll coating system
JP2004511322A (ja) * 1999-11-26 2004-04-15 ジョンソンディバーシー・インコーポレーテッド 表面に流体を付着するためのアプリケータおよび表面に流体を付着するための方法
US6423138B1 (en) * 1999-12-22 2002-07-23 Eastman Kodak Company Coating apparatus having a cascade wall and metering blade, and a cleaning and recirculation arrangement for the coating apparatus
US6402398B1 (en) * 2000-05-25 2002-06-11 Eastman Kodak Company Apparatus and method for processing a photographic product
DE102012207920A1 (de) * 2012-05-11 2013-11-14 Trützschler Nonwovens Gmbh Foulard zum Applizieren eines Bindemittels auf ein Flor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH480669A (de) * 1967-09-25 1969-10-31 Gen Aniline & Film Corp Vorrichtung zum Entwickeln von sensibilisiertem Kopiepapier
US3626833A (en) * 1969-06-09 1971-12-14 Addressograph Multigraph Liquid developing apparatus
DE2209865A1 (de) * 1972-03-01 1973-09-13 Ricoh Kk Entwicklungseinrichtung fuer diazotypie-kopiergeraete
FR2193218A1 (fr) * 1972-07-15 1974-02-15 Ricoh Kk

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245381A (en) * 1961-04-19 1966-04-12 Agfa Ag Developing apparatus
US3748996A (en) * 1972-04-03 1973-07-31 Ricoh Kk Wet developing device for diazo type copying machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH480669A (de) * 1967-09-25 1969-10-31 Gen Aniline & Film Corp Vorrichtung zum Entwickeln von sensibilisiertem Kopiepapier
US3626833A (en) * 1969-06-09 1971-12-14 Addressograph Multigraph Liquid developing apparatus
DE2209865A1 (de) * 1972-03-01 1973-09-13 Ricoh Kk Entwicklungseinrichtung fuer diazotypie-kopiergeraete
FR2193218A1 (fr) * 1972-07-15 1974-02-15 Ricoh Kk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8154145B2 (en) 2007-08-10 2012-04-10 Gunter Krauss Flow energy installation

Also Published As

Publication number Publication date
US4155637A (en) 1979-05-22
DE2729523B1 (de) 1978-06-22
JPS5414235A (en) 1979-02-02
DE2857513D1 (en) 1980-02-14
DE2729523C2 (de) 1979-03-15
EP0000175B1 (fr) 1980-01-09
HU178013B (en) 1982-02-28

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