EP0470418B1 - Séchoir pour un appareil de développement de film - Google Patents

Séchoir pour un appareil de développement de film Download PDF

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Publication number
EP0470418B1
EP0470418B1 EP91112186A EP91112186A EP0470418B1 EP 0470418 B1 EP0470418 B1 EP 0470418B1 EP 91112186 A EP91112186 A EP 91112186A EP 91112186 A EP91112186 A EP 91112186A EP 0470418 B1 EP0470418 B1 EP 0470418B1
Authority
EP
European Patent Office
Prior art keywords
emitters
emulsion carrier
reflectors
air
infra
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
Application number
EP91112186A
Other languages
German (de)
English (en)
Other versions
EP0470418A2 (fr
EP0470418A3 (en
Inventor
Walter Dipl.-Ing. Hofmuth
Rudolf Dipl.-Ing. Loistl
Helmut Ing. Grad. Schausberger
Alfons Dipl.-Ing. Kastl
Jürgen Dipl.-Ing. Müller
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 EP0470418A2 publication Critical patent/EP0470418A2/fr
Publication of EP0470418A3 publication Critical patent/EP0470418A3/de
Application granted granted Critical
Publication of EP0470418B1 publication Critical patent/EP0470418B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03D15/00—Apparatus for treating processed material
    • G03D15/02—Drying; Glazing
    • G03D15/027—Drying of plates or prints

Definitions

  • the invention relates to a method for drying a developed, moist layer support and a device for carrying out the method.
  • DE-OS 23 23 725 shows a dryer in which a blower is arranged on each side of the guideway for the substrate.
  • Each blower demands fresh air into a kind of pressure chamber, from which the air is directed onto the layer support via individual air sources. With each air source, cool fresh air is consequently brought onto the substrate, the sole purpose of which is to cool it and to remove the water vapor generated by the infrared rays. The actual drying takes place here exclusively by infrared radiation.
  • powerful blowers with a large space requirement are required.
  • the delivery rate of the blowers must be adapted to the number of air sources, including the number of infrared radiators.
  • DE-OS 21 53 752 describes a pure convection dryer in which already warmed air is passed onto the substrate.
  • the invention has for its object a method for drying a developed, moist support and to design an apparatus for carrying out the method in such a way that the efficiency of the dryer is improved and adaptation to the power requirement dependent on the application is made possible without great effort.
  • the method according to the invention enables a modular dryer structure in which only the number of emitters has to be adapted to the required dryer output without the blowers having to be adapted.
  • the operation of the dryer is also more economical than the prior art. Because the air is not drawn out of the system immediately after it has flowed through the space between the infrared radiator and the substrate, but is again mixed with the main air flow, the energy with which the air was heated by the radiator is not lost, but remains in the system.
  • This combined radiation-convection drying has the further advantage that an uneven drying result between exposed (dark) and unexposed (bright) areas, as in pure radiation drying, is at least greatly reduced becomes. Since the heated air also extracts a lot of moisture from the substrate, the different absorption capacity of dark and light areas of the substrate cannot have a strong effect on the infrared radiation.
  • the proportion of convection can be increased still further.
  • the reflectors which are usually made of very thin materials, from thick materials with a large heat capacity; on the other hand, a reflector can be removed at least on each side of the substrate, so that the corresponding radiator also acts on the main air stream and heats it. If all parts that are exposed to radiation are additionally colored black, the efficiency increases further.
  • the dryer can be controlled by a control system so that the heating takes place during the break times and during the heating phase of the baths in the developing device.
  • the dryer is controlled so that it is put into operation during these times when the temperature in the exhaust air drops below a certain minimum and is stopped again when the temperature reaches a maximum. Regulation during the drying operation can also take place via the temperature of the exhaust air by controlling the output of the reflectorless radiators.
  • the special design of the housing and the radiator on one side of the web as a unit that can be opened like a cover enables good accessibility even to long dryer sections in the event of a malfunction or for service purposes.
  • the design of the individual dryer elements as components that are the same as each other, i.e. radiators with reflectors and fans and shaft parts that are the same as each other, also allows the installation of dryers of different outputs and lengths with a small number of components to be installed and a low stock level. As with the known dryer, an even supply of fresh air and a uniform drying quality are achieved.
  • the dryer arrangement according to the invention can be implemented both in a vertical and in a horizontal arrangement.
  • the air flow of the blowers can be directed into a room of the dryer, from which it flows via exhaust hoses or shafts into suitable rooms, e.g. Adjoining rooms or outside, can be directed and does not burden the work space.
  • FIGS. 1 and 2 1 denotes a carrier part or part of a housing, on which housing parts 2 and 3 of a dryer for developed, light-sensitive layer carriers are mounted.
  • a developing machine (not shown) of any known type can also be mounted on this carrier part in the direction of the layer carrier transport before the dryer, so that it is permanently assigned to the dryer.
  • the housing part 2 is fixedly mounted and in differently divided rooms, namely the room 2a for the input transport rollers 4, the room 2b for several infrared radiators 5 arranged one behind the other in the layer carrier transport direction with reflectors 6 arranged behind them and baffles 7 inclined between them towards the transport path and behind them Baffles 7 arranged transport rollers 8, the space 2c for a cross-flow fan 9, from which behind the reflectors 6 a baffle plate 10 which runs obliquely to the transport path runs as part of an air shaft, and the space 2d into which the moist blower air flows after flowing through the dryer and through an only indicated drain 11 via a hose into the free or another suitable space can be directed so that it does not burden the installation and work space for the developing machine and dryer.
  • the spatial structure of the housing part 3 is arranged essentially symmetrically to that of the housing part 2 with respect to the layer carrier web, but is arranged so as to be pivotable about the axis 12 from the housing part 2 and, of course, can be locked to the latter in the closed state.
  • known and not shown struts with notches are provided, which prevent the housing part 3 from falling when opened.
  • the emitters 5, reflectors 6, guide plates 7 and rollers 8 and the blower 9 in the housing part 2 are arranged in such a way that in the closed state of the housing part 3 they each have the same part in the housing part 2, a pair symmetrical to the layer carrier web form.
  • the rooms 2a to 2d are drawn in the schematic drawings as continuous lines, as are the radiators, reflectors, rollers and fans which are not visible when the housing 2, 3 is closed.
  • the housing and the built-in parts have openings across the width of the layer carrier web and sufficient spacings over the length of the layer carrier web that the air streams can flow in from the fans 9 via the rollers 8 and between the radiators 5 into the layer carrier web and further in their direction.
  • the blowers 9 can be arranged at the lower end of the drying section and blow against the transport direction, as shown in FIGS. 1 and 2, or can be mounted at the beginning of the drying section and in the layer carrier transport direction blow as shown in Figure 3.
  • the housing part 3 has rooms 3b and 3c corresponding to rooms 2b and 2c.
  • the rollers 8 of the roller pairs are all stored in the fixed housing part 2, because this makes their drive easier.
  • the radiators 5, reflectors 6 and guide plates 7 and the blower 9 of the pivotable housing part 3 are mounted in this.
  • projecting bearing tabs 2e, 3e are provided on both housing parts 2, 3, which are shaped and arranged in such a way that they mesh with one another like teeth when the dryer is closed. For the sake of clarity, they are only numbered in FIG. 1.
  • FIG. 3 shows a dryer according to the invention in a horizontal arrangement with only two radiator units. Parts having the same effect are numbered with the same reference numbers as in FIGS. 1 and 2.
  • the blowers 9 are arranged at the dryer entrance, as already mentioned.
  • the upper housing part 3 is the housing part which can be opened like a lid.
  • the bearing tabs 2e, 3e are attached to the inner surfaces of the side housing walls, so that the dividing line between the two housing parts 2 and 3 is formed by a straight line.
  • the air shafts 10 for the blowers 9 are formed here by housing inner walls running obliquely towards one another.
  • radiators 5 The same components are used as radiators 5, reflectors 6, guide plates 7, rollers 8, so that regardless of the size of the dryer and the number of its radiator pairs, only a small number of different components need to be kept in stock.
  • the reflectors and baffles and their brackets are simple bent parts, the brackets 13, 14 only extending over a small part of the dryer width, so that they do not obstruct the radiation and air flows of the blowers 9. Openings 6a can be arranged in the reflectors 6, which do not noticeably disturb their reflection effect, but also allow the blown air to pass through.
  • the mode of operation of an exemplary embodiment according to the invention is to be described in FIG.
  • the cross-flow blowers 9 are excellently suited for this drying process, since they deliver a uniform flow over the entire width of the substrate. Their operation is also very quiet, so that no special noise protection measures have to be taken.
  • Cross-flow fans can only be used for the drying process described, since the fans do not have to generate high pressure here.
  • an air flow rate of 200 cbm / h is sufficient.
  • a main air flow A is generated in the air shaft 10 by the blower 9.
  • Branches in front of the first radiator 5a a partial air flow B, moves between the radiator 5a and the transport path for the film and combines again with the main air flow A.
  • This partial air flow now acts in two respects. On the one hand, it removes the moisture that is created by the action of infrared radiation between the radiator and the film, and on the other hand, the air sweeps over the film surface and absorbs further moisture.
  • the partial air flow B is also heated by the radiator. This means that the main air stream A is heated by mixing with the partial air stream B and its moisture content is increased.
  • the partial air flow C already has a higher temperature than the partial air flow B, as a result of which the convection share in the drying process is increased compared to the radiation component which has remained the same.
  • the last partial air flow D has the highest temperature and thus also the highest convection component.
  • the main air stream A has a temperature of up to approx. 55 ° C after mixing with the partial air stream D and is still used for pre-drying the film in the form of pure convection drying.
  • the radiator 5a is not equipped with a reflector.
  • the radiation is therefore directed backwards and thus contributes to the heating of the main air stream A.
  • the effect can be increased further if the oblique boundary wall of the air shaft 10 is colored black.
  • the dryer is regulated by the control electronics 20. If the dryer output is too low, for example, the temperature in the outflowing air is measured by the temperature sensor 21. The control electronics then increase the power of the radiator 5a until the temperature in the exhaust air is in a certain range.
  • the dryer output can be increased further in adaptation to ever larger film development speeds without the connected load having to be increased.
  • the convection rate is increased again.
  • storage masses are installed in the dryer, which during the so-called. Stand-by times, that is, work breaks and the times in which the development baths are heated up.
  • the reflector 6b is shown in Figure 5, which is made of a thicker material than usual with a high storage capacity.
  • This process is also controlled by the electronics 20. During the stand-by operation, the dryer cools slowly and this drop in temperature is detected by the sensor 21.
  • the electronics 20 then put the radiators 5 and the blowers 9 into operation.
  • the heat storage heats up, e.g. the reflector 6b. At a certain temperature in the exhaust air, the dryer is switched off again. In this way, the dryer is always ready for operation and can release the stored energy to the air flow as soon as heat is required.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Drying Of Solid Materials (AREA)

Claims (12)

  1. Procédé pour sécher un support revêtu, développé et humide, en particulier un film à rayons X après le passage à travers un appareil de développement, dans lequel on mène le support revêtu à travers un séchoir qui comporte plusieurs éléments de rayonnement infrarouge (5) agencés des deux côtés le long de la voie du support revêtu, des réflecteurs (6) étant prévus sur le côté de ces éléments de rayonnement qui est détourné du support revêtu, et ces réflecteurs renvoyant le rayonnement infrarouge vers le côté du support revêtu qui leur fait face, caractérisé en ce que l'on mène des deux côtés du support revêtu sur la face arrière des réflecteurs (6) un courant d'air principal (A), qu'on fait passer respectivement un courant d'air partiel (B, C, D) entre un élément de rayonnement à infrarouge (5) et le support revêtu, et qu'on le réunit ensuite à nouveau au courant d'air principal (A), de sorte que la température et l'humidité du courant d'air principal augmentent dans la direction de l'écoulement.
  2. Procédé selon la revendication 1, caractérisé en ce que le séchoir est réchauffé pendant la phase de chauffage pour les bains dans l'appareil de développement, et pendant les périodes de pause.
  3. Appareil pour mettre en oeuvre le procédé selon la revendication 1, qui comprend au moins une paire d'éléments de rayonnement à infrarouge (5) l'un en face de l'autre, avec des réflecteurs (6) situés par derrière, et des paires de cylindres (8) avant et après la paire d'éléments de rayonnement pour transporter à travers l'appareil un support revêtu, développé et humide, ainsi qu'un ventilateur d'air frais (9) sur chaque côté de la voie du support revêtu, caractérisé en ce que les ventilateurs d'air frais (9) sont agencés dans la direction de la voie des supports revêtus devant ou derrière la paire ou les paires d'éléments de rayonnement (5) vers les deux côtés de la voie des supports revêtus définie par les paires de cylindres (8), sous la forme de ventilateurs à courant transversal (9), dont les courants d'air sont dirigés dans la direction de déplacement des supports revêtus, ou dans la direction inverse, de sorte que des deux côtés du support revêtu, un courant d'air principal (A) est mené contre la face arrière des réflecteurs (6), et un courant d'air partiel (B, C, D) traverse respectivement entre un élément de rayonnement à infrarouge (5) et le support revêtu, et est ensuite à nouveau réuni avec le courant d'air principal (A).
  4. Appareil selon la revendication 3, caractérisé en ce qu'à l'élément de rayonnement à infrarouge (5a) situé le plus près du ventilateur (9), n'est associé aucun réflecteur.
  5. Appareil selon la revendication 3, caractérisé en ce que des masses d'accumulation thermiques sont intégrées au séchoir, ou bien que par exemple au moins deux des réflecteurs (6b) sont réalisés de telle manière qu'ils servent de masse d'accumulation thermique.
  6. Appareil selon la revendication 3, caractérisé en ce qu'il est prévu un capteur de température (21) à la sortie d'air du séchoir, et une unité de commande (20), qui commandent le ventilateur (9) ensemble avec les éléments de rayonnement à infrarouge (5) en fonction de la température de sortie d'air.
  7. Appareil selon la revendication 3, caractérisé en ce qu'un boîtier de couverture et de montage pour les éléments de rayonnement (5), les réflecteurs (6), les cylindres (8), et les ventilateurs à courant transversal (9), est divisé en deux approximativement parallèlement à la direction de déplacement des supports revêtus, et en ce qu'une partie (3) du boîtier est montée de manière à pouvoir basculer vers le haut, et en ce que les éléments de rayonnement (5), les réflecteurs (6) et le ventilateur à courant transversal associé (9) prévus du côté de la partie de boîtier (3) basculante, sont montés dans cette partie de boîtier basculante (3).
  8. Appareil selon la revendication 7, caractérisé en ce que des pattes de montage (2e, 3e), qui s'engagent les unes dans les autres à la manière d'une denture dans la position fermée des parties de boîtier (2, 3), sont agencées le long de la ligne de séparation des deux parties de boîtier (2, 3), pour le montage des éléments de rayonnement (5) et des réflecteurs (6) qui peuvent être rabattus avec la partie de boîtier (3) basculante, et pour les paires de cylindres (8) agencées entre les éléments de rayonnement (5) sur la partie de boîtier fixe (2).
  9. Appareil selon la revendication 7, caractérisé en ce que des pattes de montage (2e, 3e) pour les éléments de rayonnement (5) et les cylindres (8) sont agencées sur les surfaces intérieures des parties de boîtier (2, 3) le long d'une ligne de séparation droite, de telle manière qu'elles n'empêchent pas le basculement de la partie de boîtier basculante (3).
  10. Appareil selon l'une des revendications 7 à 9, caractérisé en ce qu'il est prévu un cadre (1) pour le montage de la partie de boîtier basculante (3) au moins.
  11. Appareil selon l'une des revendications précédentes, caractérisé en ce que les éléments de rayonnement (5), les réflecteurs (6), les tôles de guidage (7) et les éléments de fixation (13, 14) sont formés par des composants qui sont respectivement identiques les uns aux autres.
  12. Appareil selon l'une des revendications précédentes, caractérisé en ce qu'un puits à air (10) est agencé derrière les réflecteurs (6), en oblique vers la voie des supports revêtus.
EP91112186A 1990-08-04 1991-07-20 Séchoir pour un appareil de développement de film Expired - Lifetime EP0470418B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4024866 1990-08-04
DE4024866 1990-08-04

Publications (3)

Publication Number Publication Date
EP0470418A2 EP0470418A2 (fr) 1992-02-12
EP0470418A3 EP0470418A3 (en) 1992-08-26
EP0470418B1 true EP0470418B1 (fr) 1995-08-23

Family

ID=6411698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112186A Expired - Lifetime EP0470418B1 (fr) 1990-08-04 1991-07-20 Séchoir pour un appareil de développement de film

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Country Link
US (1) US5228210A (fr)
EP (1) EP0470418B1 (fr)
DE (1) DE59106291D1 (fr)
DK (1) DK0470418T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0699958A1 (fr) * 1994-09-05 1996-03-06 Agfa-Gevaert N.V. Méthode et dispositif pour le développement de feuilles photographiques
US6401360B1 (en) 2000-04-13 2002-06-11 Eastman Kodak Company Apparatus and method for drying photosensitive material using a radiant heat assembly
US6851545B1 (en) 2004-03-23 2005-02-08 Caddy Corporation UVC conveyor belt system
DE102016123345B3 (de) * 2016-12-02 2018-05-09 Tilman Kraus Vorrichtung zum Trocknen von Zahn- oder Knochenoberflächen

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2571815A (en) * 1947-07-12 1951-10-16 Remi A Benoit Apparatus for and method of drying
DE1191690B (de) * 1963-04-13 1965-04-22 Internat Copying Machines Co M Durchlauftrocknungsgeraet zum Trocknen fotografischer Schichttraeger
ZA711340B (en) * 1970-03-19 1972-10-25 Wiggins Teape Res Dev Improvements in methods and apparatus for drying sheet material
IT965804B (it) * 1972-05-10 1974-02-11 Minnesota Mining & Mfg Procedimento e dispositivo per la asciugatura rapida di pellicole fotografiche
US3973328A (en) * 1972-05-26 1976-08-10 Ilford Limited Paper material dryer
US3826014A (en) * 1973-03-19 1974-07-30 Sun Chemical Corp Shutter mechanism for radiation-curing lamp
IT1142448B (it) * 1981-06-19 1986-10-08 Minnesota Mining & Mfg Dispositivo di asciugamento di pellicole fotografiche impregnate di acqua basato sulla cuombinazione di aria calda e raggi infrarossi emessi da sorgenti a potenza variabile
DE3334381A1 (de) * 1983-09-23 1985-04-11 Fleißner GmbH & Co, Maschinenfabrik, 6073 Egelsbach Trockenschacht
US4594795A (en) * 1984-10-23 1986-06-17 Erik Stephansen Air bearing support apparatus for drying a moving web
DE3522695C1 (de) * 1985-06-25 1987-01-15 Monforts Gmbh & Co A Infrarottrockner
US4783908A (en) * 1986-05-09 1988-11-15 A. Monforts Gmbh & Co. Infrared drying apparatus
US5097605A (en) * 1989-03-31 1992-03-24 Konica Corporation Photosensitive material processing apparatus

Also Published As

Publication number Publication date
EP0470418A2 (fr) 1992-02-12
DK0470418T3 (da) 1995-12-27
EP0470418A3 (en) 1992-08-26
US5228210A (en) 1993-07-20
DE59106291D1 (de) 1995-09-28

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