DE3111076A1 - Developing unit with transport of traction means - Google Patents

Abstract

The developing unit (20) has a developing bath (27.1), fixing bath (27.2) and watering bath (27.3). A main transport traction means (37) guides a transport rod (25) with driver shoes (80) from the insertion station (26) to a first transfer, at which a bath traction means (39) with driver teeth (88) grips the transport rod (25). While the driver shoes (80) of the main transport traction means run on their own track, the bath transport traction means (39) guide the transport rod (25) and, behind themselves, the photosensitive material (24) through the developing bath, and in the region of squeegee rollers (30, 31) transfers the transport rod (25) to the main transport traction means (37) and transfers the latter in turn to a next bath traction means (39.2), so that no bath retardation occurs. After the last bath (27.3), the main transport traction means (37) takes over the transport rod (25) and leads it together with photosensitive material (24) through a drying unit (63) to the machine outlet (28). <IMAGE>

Description

PATENT Attorney DIPL.-ING. GERD UTERMANN 71 HEILBRONN. PO Box 3525. CABLE: PATU. TEL. (071313 82828

Kilianstrasse 7 (Kilianspassage) Deutsche Bank Hellbronn: 364364 Handelsbank Hellbronn: 23080 5 Kreissparkasse Heilbronn: 7001 6 Postscheck Stuttgart: 43016-704

Patent and utility model help application

D 12. 2 D 61 March 19, 1981 I / IH

Applicant: Company

Dürr-Dental GmbH & Co. KG

Etzelstraße 8 P.O. Box 305

D-7120 Bietigheim

Description; Development device with traction device transport

Description:

The invention relates to a developing device for photosensitive materials, which successively run through several treatment baths, such as developer bath, fixing bath, water bath and wherein the attached to a transport bar photosensitive material along a predetermined film path from the device inlet to the first bath inlet and through the baths and between the individual baths Partition walls and deflection devices is guided and wherein the transport rod is at least partially along the film track guided traction means can be coupled.

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A variety of photosensitive material processing machines are available. These materials are discussed below for the sake of simplicity referred to as film, although the term includes all positive and negative materials, for example for X-rays, for the graphic industry, for optical information carriers and other negative and positive materials should fall with layer carriers. The invention relates to smaller or medium-sized devices Working widths of a few decimeters, for example about half a meter in size. The pass lengths can be just a few centimeters per piece of film to be developed or many meters. There are two fundamentally different transport systems. With one transport system, which is particularly suitable for small pieces of film is, the film is passed between the transport and squeeze rollers. So is a large number of roles in required between baths and baths. These rollers must all be driven synchronously. That takes one high manufacturing costs and, above all, the often necessary cleaning of the devices, a large amount of time for the cleaning. In addition, the roll packages, which are taken out of the baths, are relatively heavy and can with Film widths of about half a meter can hardly be lifted out without tools. The advantage of this roller arrangement lies in the fact that treatment liquid is not transferred from one bath to another through the transport system but that this bath carryover is limited to the film material. The changes in treatment conditions due to carry-over are often considerable and must therefore be reduced as far as possible. The second The transport system has traction means in the form of endless chains or belts that run through the baths one after the other and to which transport bars or other transport aids be coupled to which the film is attached. These traction means constantly transport treatment liquid out a bath that has been run through beforehand into one that has to be run through afterwards

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Bath to consider in treatment conditions of regeneration and the like. Particularly disadvantageous are chains in this regard, because they take up considerable amounts of liquid in their many interstices. They have but the advantage that you can work very precisely coordinated and in time and defined conditions with regard to synchronism can achieve. They are also expensive to manufacture and maintain. In addition, they must be made of materials which neither change the treatment fluids nor are they subject to changes as a result of the treatment fluids are. As a result, the choice of material is very limited, and longer traction devices cause particular difficulties. Continuous belt tensioning means are also unsatisfactory Results.

The invention is intended to equip a developing device of the type mentioned at the outset with transport devices which work safely and are easy to manufacture and easy to maintain, and above all carry away a bath liquid in an undesired manner into a subsequent bath.

According to the invention it is provided that at least in one treatment bath, namely, at least one bath tension means circulating only in the respective bath is provided at least in the developer bath is to which the transport rod can be coupled and that at the bath inlet and at the bath outlet an outside of the liquid running transfer and possibly entrainment transport means is provided to which the transport rod can be coupled. Due to the essential idea of providing a separate bath traction device for each bath, the many rollers are not required in the baths. which are difficult to clean and difficult to drive, and the film material can easily be removed from the transport rod be pulled through the bath, and only the deflection rollers required to deflect the film path are loaded

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required with their associated bearings and, if necessary, drives. A bath traction device circulating in the bath can carry no treatment liquid into the next bath. It is also relatively short and 'therefore better'. To such a one Badzugmittel includes a corresponding handover that the transport rod at the inlet to the bath traction means, removed from the bath traction means at the outlet and to the next bath traction means or a handing over another means of transport. While the Badzugmittel must always be a rope, a band or a chain, the Input and transfer also with toothed or chain wheels, articulated gears or other feed and transfer means take place. There are many possible variations with regard to the feed and discharge of the transport rod. The bath traction means are expediently supported and guided on the bath walls in a manner familiar to the transport specialist. Also, since they do not come into contact with the film, so much care is not required to clean them as with regard to the transport rollers in roller transport developing devices.

For the design of the coupling means between the transport rod and traction means, there are various options, each of which must meet the condition that the transport rod is securely held both inside and outside the bath, but that the means of transport that work outside the baths can take such routes that they allow a safe transfer and, on the other hand, do not come into contact with the treatment liquids.

A particularly safe embodiment of the coupling devices provides for suspension drivers on the traction means, in FIG which the end areas of the transport rod can be suspended. A relatively simple transport bar can be used and suitable, coordinated suspension drivers are on the bath pulling means and the transfer and other

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Provide transport facilities. These can be the same or also be different. Such suspension drivers can be designed in a more simple and reliable manner than transversely open to one side in the direction of travel. Fork driver be formed, the openings of which except in transfer areas Support members are opposite, on which the transport rod is supported. So can in the absence of the support members by relative movement between the transport rod and the pull or Transfer means transversely to the running direction, the engagement and disengagement take place. The drivers could have their own holding devices be equipped to protect against unintentional escape, or profile shapes could be used which ensure the plague holding through relative rotation to each other. However, an embodiment works simply and safely in which the fork drivers are open and the transport rod through other support members in the drivers is held. Such support members can be partly from support tracks and partly from rollers, e.g. B. the guide rollers for the photosensitive material. The support tracks can be partly from housing walls and partly from Be formed wire supports that are formed parallel to the track of the transport rod. The transport rod slides on these held along in the drivers.

When designing the transfer means of transport, it must be taken into account that the film must be squeezed off between the individual baths to hold back the bath liquid and that accordingly the transport rod between the squeezing device must be moved through. This complicates the theoretically possible arrangement of the various traction devices in same levels, which only run on top of each other outside the bathrooms, with appropriate transfer and lifting devices. Therefore, a more clever solution can be seen in letting the traction means rotate in different planes, and the To make drivers so that they can alternately attack the transport rod. Accordingly, one looks special

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expedient solution that in the areas outside the working width on each side of the treatment bath a bath tensile agent circulates, and as a transfer and take-away transport means outside the planes of circulation of the bath traction means and the Attack plane of the Badzugmittelmitnehmer and outside the Baths running main transport traction device drivers in the areas of the transport rod ends revolve. Be accordingly the outer end areas attacked by the transport facilities outside the baths, while a little further down internal areas are provided for the attack of the Badzugmittel. So one is essential in the management of the traction mechanism Freer and can easily reach parallel runs or desired intersections in transfer areas. It is special expedient that the main transport traction means rotate in planes outside the rod ends, but in the direction of the rod ends have protruding driving shoes so that only these come into engagement, while in areas in which no intervention is desired ", the traction means and the transport rods can be guided more freely. The bath traction means are expediently provided with over the outer running lines of the actual traction means protruding, fork-shaped arranged driver teeth. These can easily be attached to the transport bar attack. The design of the traction means as chains has many advantages. You can be guided safely and driven well will. They can be put together endlessly, even in different lengths, and above all allow safe and precise coupling of the transport bars with simple means. For this purpose, the chain links can have driving teeth, which are roughly at right angles to the chain links protruding take-away tab legs are designed. Instead of the usual chain links, special chain links are used with the teeth forming legs used where this is to be provided according to the cycle. With such take-away shoes and driving teeth, the transport rod can be a round rod, which in the area of its ends with the support

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is equipped with associated axial locking plates. These ensure the correct axial position in a simple manner Way and can be supported on the support tracks and / or drivers alone or in cooperation with the rod ends. However, there are also other transport rods with specific, for a special holding or guiding effect meaningful cross-sectional shapes and longitudinal designs can be used. There are a variety of bathroom designs and guided tours of the film career in the bathroom depending on the size and shape of the bath and the duration of the treatment. Suitable for a device with an average working width of around 50 cm baths in which only one deflection roller is provided, namely in the lower area. The outer radius corresponds to the inner radius of the orbit of the transport rod.

So that the transport bar at the transfer point between the bathrooms with their large dimensions in relation to the film, can be seen above the guide rollers between the baths and at the end of the soaking bath, loosely lying squeeze rollers, which are preferably are guided in vertical housing wall slots. These also offer the advantage that they are exposed and thus rollers exhibiting crystallization of the bath after the break are easily removed and good can be cleaned. You can then easily get to the deflection and squeegee roller below.

As mentioned, the handovers can be designed in different ways. Expediently, the main transport traction means, which are already present, are used and effected the transfer in the deflection areas to the inlet and outlet of the individual baths as transfer means of transport. Ever according to the configuration of the coupling between the transport rod

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and traction means is to be used with such couplings that do not allow an intervention at any point ensure that the division of the main transport towing means and the running length between the transfer points are on the Division of the Badzugmittelmitnehmer is coordinated and that the drives of the main transport traction means and Badzugmittel with each other are synchronized. Then a flawless handover is always ensured. If the length of the traction mechanism is not too great only the main transport traction means to be driven by a motor and in turn as a drive for the pulleys and Deflection rollers and the bath transport traction means are used.

Given a suitable configuration of the coupling means between the transport _{rod and} the traction means, these can be designed as continuous rope, band or strip-like traction means, which may be suitably configured. However, it is particularly advantageous if at least the traction means are link chains. The main transport traction means is also expediently formed with link chains, and for better synchronization only one endless main transport traction means link chain is provided on each side, although it is also possible to have separate or partial areas at the inlet in the area of the baths and over the often longer outlet and drying area To arrange traction means. Accordingly, the main transport traction means can expediently transport the transport rod from the bath outlet of the last bath through a drying station to the device outlet.

The coupling of the transport rod to the first means of transport at the beginning can be done for example by inserting into the driver in the rest position. However, that should easily lead to trouble. It is therefore useful to see an insertion station for the transport rod at the device inlet before. This can be done in various ways with wheel mechanisms, joint mechanisms, in particular with a ratchet

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working lifting mechanism driven by the traction mechanism Introduces the transport rod into a pair of drivers. The insertion station expediently has a downwardly inclined insertion path an end position recess, from which the lifting pawl forms the transport rod lift out. So you can move the transport bar by hand easily insert into the end position recess and the further safe coupling is done by the insertion station. So that one is the photosensitive Material well on the transport bar without the risk of the machine starting up or getting into moving parts can attach, you can see at the introduction station. Resting troughs before, in which the transport bar initially is inserted. After fastening, it is then moved into the end position recesses and coupled from these. In further Design you can then between the rest trough and the end position trough when moving the transport rod Scanning element that starts the machine, for example a microswitch, other contact sensor or contactless sensor, provide so that when the transport rod is moved into the end position trough, the development process automatically starts Gear is set. Further features, advantages and expedient refinements of the invention are also in the claims and dealt with in the following part of the description drawn up with reference to the drawings.

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An exemplary embodiment of the invention is explained below with reference to the drawings.

Show it:

Fig. 1 A vertical longitudinal section along the line 1-1 in Fig. 2 by a developing device with traction means transport;

FIG. 2 shows a vertical cross section along the multiple angled section line 2-2 in FIG. 1; FIG.

3 shows a largely schematic plan view the baths and the transport equipment as well as the other parts of the device, where the squeegee rollers are omitted;

FIG. K shows a somewhat enlarged oblique view of some parts in the region of the insertion station; FIG.

FIG. 5 shows a scale which is approximately the same as FIG. 4 Partial oblique view of the essential elements in the area of the transfer at the inlet into the developer bath;

6-9 four schematic partial side views of the two transport chain systems with the drivers in different phases during the handover of the transport rod;

Fig. 10 is a partial vertical section through the deflection

and squeeze rollers in the area above a partition, where other parts of the device and elements lying behind the plane are omitted;

11 shows a representation corresponding to FIG. 10, in which the transport rod is just between the roles.

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away

Figures 1 to 3 show a developing device 20 with frame parts 21 and a light-tight housing 22 which encloses a light-tight space 22.1. In the left in 1 is the inlet 2j5 formed for the cassette 24.1 with the photosensitive material 24. The photosensitive material is here at 24.2 rolled up and attached to a transport rod 25, the is hung in the insertion station 26. The photosensitive material runs along the film path through the treatment baths 27, namely a developer bath 27.1 and a fixing bath 27.2 and a soaking bath 27.3 and reaches the device outlet 28. In the baths, material deflection rollers 29.Ij 29 · 2 and

29.3 provided. Above the partition walls 27.4, '27 .5, 27.6 and 27.7 are further deflection rollers 30.1, 30.2, 30.3 and

30.4 provided that because of the representation of the sprockets not directly recognizable in FIG. 1, but are also indicated there with reference symbols. They are, as Fig. 2 illustrates, in front of the drawing plane. However, their outer radii correspond to the pitch circles of the chain wheels. On the deflection

"· - rolls 30.2, 30.3 and 30.4 are, as in FIGS. 9 and better illustrated and explained in more detail using the same below, loosely only pressing under their own weight Squeegee rollers 31.2, 31.3 and 31.4, which are guided in slot guides 33 in the side enwandteile 34.

A traction means transport system 35 for the transport rod has circulating main transport traction means 37 * which run through endlessly and are driven by motor 38 on both sides of the baths 27 and run over a plurality of pulleys in the manner shown.

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In each of the baths are located within the Wandur ^ and zu the main transport traction means are offset by bath traction means 39 Suitable transfer devices explained in more detail below in the exemplary embodiment and coupling systems ensure synchronization and transfer of the transport rod 23.

A suitable control circuit 4o, which is only indicated schematically here is connected to all sensors and drives, as the corresponding cables show, but which are not in all details are explained because they are largely of minor importance for the transport., for the overall effect however, are necessary or at least beneficial for the institution. There is a switch under these sensors 42, which is actuated by the photosensitive material 24 after leaving the washing bath 27.3. His switching line 42.1 leads to circuit 40. It is used to switch on the drying device 63 ·

In each bath there is on the one side protruding beyond the transport system, as shown in Fig. 2 on the left, a circulation pump 60 driven by a pump motor 60.1 and the bath liquid sucks in and ejects again. It is surrounded by a heating coil 6l, its feed line 61.1 leads to the control circuit 40, as does the feed line 60.2 of the pump motor. The Developer bath and in the fixing bath each have a temperature sensor 62 which, for the sake of clarity, is only given a reference symbol in FIG was designated. His control line 62.3 leads to circuit 40. Otherwise, between the bath outlet of the Soaking bath and device outlet 28 a drying device with a heater 63-1 and a fan 63 · 2 is provided, whose feed and control lines are also connected to the circuit. Dosing pumps 58.1 and 58.2 with their control lines 58.3 and 58.4 are also indicated schematically. The liquid feed line 58-5 is

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shown only partially, namely at the top right in FIG. 2. It is used for the controlled replenishment of the treatment bath. Overflow pipes, drain lines and taps and the like omitted for the sake of clarity, since they are to be carried out in the manner familiar to the person skilled in the art. The liquid level in the bathrooms is marked 27-9. At the device outlet 28 is an outlet basket formed from parallel wire rods 28.1 provided. As shown in Fig. 1, the film happens after leaving the washing bath 27.3 and his Squeegee rollers 30.4 and 314 another rubber transport and pair of squeeze rollers 65.1 and .65 · 2, as well as shortly before the outlet the pair of transport rollers 66.1 and 66.2, each of which one that is driven with the help of a sprocket. The roller 65.2 is also guided loosely, as can be seen in FIG. 1 the obliquely arranged elongated hole. At the inlet 23 is a light barrier arrangement 43 is provided for scanning the film surface that has passed through. She has a photocell 44, which runs back and forth by means of a cross-spiral grooved drive roller 45 via a reversing clutch slide (not shown) is driven. Its drive motor 50 can be seen from FIG. 3. The light barrier is covered in FIG. 3. She has channels and receiver 55, which are not shown in more detail. The transmitter emits a pulsed infrared beam that reflects off the film and is received by the recipient. If there is no film, the anechoic or anechoic one reflects Material guide roller 46 is not and the recipient is not Signal to the control circuit 40. The lines for the light barrier 45 are omitted for the sake of clarity. the The roller 30.5 lying above the light barrier 43 is shown broken away to show the drive roller 45.

The traction means transport system 35 for the transport rod 25 will now be described in more detail below. On the transport bar 25, which is designed here as a round rod, is the photosensitive material 24, which is here for the sake of simplicity

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is only designated as film 24, with the aid of brackets 25.4 attached, which grip around a wrapped end. There are also other types of attachment possible that a flawless Allow attachment for a partially long pass and also the passage between squeegee rollers enable. From the Pig. 2 and 3 it can be seen that traction means, which here are all designed as chains, run in several levels. All levels lie outside the working width 100, which is determined by the rollers 29 and 30 is, and runs on each side of the working area of the baths given by the working width 100 a main transport traction means 37. The main transport traction means runs on the left side of the device as seen from the inlet 37.1 in level 103.1, while on the right side the main transport traction means 37-2 in level 103.2 running around. As can be seen from FIG. 1, it runs from the drive sprocket driven by the motor 38 via a chain 38.1 70, which is arranged below the treatment bath 27, initially a little downwards to the front via a first deflection sprocket 72.13, from there via the infeed station 26 obliquely upwards to the second roller drive sprocket 72.14, which is approximately at the level of the liquid level, however, outside the baths, from there obliquely backwards to the Sprocket 72.1, which is located at the first transfer over the front wall 27.4, from there a little downwards under the Drive sprocket 72.5 continues over the next sprocket 72.2 on the second transfer part above the partition 27.5 between developer bath 27.1 and fixing bath 27.2, further under the drive sprocket 72.6 over the sprocket 72.3 above the partition wall 27.6 between the fixing bath 27.2 and the washing bath 27.3, under the drive sprocket 72.7 through to the sprocket 72.4 above the end wall 27x7 of the washing bath, from there behind the washing bath diagonally downwards to the sprocket 72.8 and on to the chain

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wheel 72.9, at which it is deflected 90 ° horizontally, further to chain wheel 72.10 and to chain wheel 72.11, horizontal on through drying station 63 and then to sprocket 72.12 at equipment outlet 28, back to drive sprocket 70. The sprockets on each are similar Page arranged in levels 103.I and 103.2. The sprockets sit on the axles of rollers over which the film runs is pulled, or they are arranged as free-running deflection wheels. The length of the chain is tailored exactly how it is described below. This main means of transport is designed as a link chain made of plastic, which is resistant to the chemicals used, although, as can be seen from FIG. 1, the chain runs at all points outside the treatment baths, namely on the one hand outside around the housing and on the other hand always above the bath surface 27.9 of the respective treatment bath 27

In this exemplary embodiment, each of the treatment baths runs outside the working width 100 on each side In level 104.1 or 104.2, a bath chain 39- This is immersed in the bath, but is only assigned to the respective bath and do not immerse yourself in another bathroom. She is also designed as a plastic link chain. It runs from a bath drive sprocket 74.1 obliquely downwards to one Bath roller chain wheel 74.2 around this and obliquely upwards to a bath chain deflection wheel 74-3 and from this slightly obliquely downwards back to the bath drive sprocket 74.1. The two chain wheels 74.1 and 74.3 are rotatably mounted on corresponding bearing journals. The journals protrude from the support side walls 75 · 1 and 75.2 inwards in the direction of the rollers 30 and 3I through the bath side walls 34.1 and 34.2, the Sprocket 74.3 flying as

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simple deflection sprocket is stored. The chain wheel 74.2 sits on the shaft 29.11 of the deflection roller 29.1 in the lower area of the bath. The bath drive sprocket 74.1 is cantilevered, but non-rotatably with a drive transmission wheel 76, which is arranged in the plane I05.I or 105.2 on the respective side and is connected via an auxiliary drive chain 77 to the transmission sprocket 78, which is non-rotatably seated on a shaft , with which the drive sprocket 72.5 of the main transport traction means 37 is also non-rotatably connected and which is rotatably mounted in the walls ~ $ K and 75 in order to transmit the rotary movement of the main transport traction means to the respective bath traction means. The same bath tension means drives with chains or gears and deflection wheels and rollers are arranged in all three baths, although according to the main idea of the invention it is only important that a separate bath chain runs in the developer bath so that no developer is carried over into the fixer, otherwise the fixation quality would be affected. However, it is useful to provide the same arrangements in all bathrooms, as shown. The main transport chains JJ and the bath chains J> 9 are precisely matched to one another in order to carry out the drives synchronously and also to ensure the transfer of the transport rod 25, which is dealt with below.

For this, as can be seen better from FIGS. 4 to 9, a special arrangement made. The main transport chain 37 consists of conventional link chain links with cranked ones Tabs. The chain pins of individual links, which are arranged at coordinated intervals, point inwards towards the rollers elongated and wear driver shoes 80 while the bath chains also have chain links of the same type with plates and bolts as the main transport

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chains. Here, however, individual special driving tabs 86 are equipped with driving tabs 88, which are designed as driving tab legs molded onto the main tab 87. They are each designed to lie in the plate plane for two adjacent bolts. They limit between them the fork driver opening 89 , which is open transversely to the chain running direction. The bath chain 39 is designed here in the exemplary embodiment so that between every two bolts to which driving teeth 88 are assigned, a bolt with corresponding link plates follows, which bolt is equipped without teeth. This results in many fork take-up openings 89 and thus many positions for inserting the transport rod 35

On the main transport chains 37, the driver shoes 80 are arranged at a much greater distance. With regard to the running lengths between the individual transfer points, this distance is to be selected so that a transport rod inserted at one point in the bath chain exactly meets a driver shoe 80 again when it leaves the same bath. The profile of the driver shoes 80 - as can be seen from FIGS. 6 to 9 - is designed in exactly the same way as the driver teeth 88 of the driver tabs of the bath chains 39 , only due to the spatial extent of the side walls 8l and the holding base they have an almost cubic shape with the direction transverse to the direction of travel entrainment opening 83 which is open on one side and into which the rod end 25.2 of the transport rod 25 fits, the end face of which is held against lateral deflection by the wall surface adjacent to the chain link or by the tab. Since the chain links of the main transport chain 37 and bath chain 39 have the same length and design, they can be run very well in time. What is important, however, is the correct spatial allocation and the direction of movement of the chains at the transfer points so that they can be handed over and taken over exactly in time. The transport rod / would fall out of the carrier openings 83 and 89,

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if there were no supporting members. First, the surfaces of the rollers 30 form support members, is on the other hand, as can be seen in particular from Figures 5 to 9, by special supporting webs at the points at which a support is necessary for retention of the transport rods 25 in the driver openings 83 » 89 taken care of. At the points where no rollers are running, profile-curved wire supports 91 are provided corresponding to the film track of the transport rod 25 at a small distance, which corresponds to the diameter of the transport rod, the course of which is best seen in the thick line in FIG. 1 and which are composed of individual pieces, each of which extends to the transfer points. They also do not need to be in one plane, but must ensure that the transport rod 25 is in contact with each other. In FIG. 5, the support sheet 91.1 coming from the inlet can be seen, which is bent at 91 * 2 to form a fastening leg. The next wire support web 91 × 3 begins, as FIG. 5 shows, behind the roller axis and then leads through the developer bath to the next transfer point.

Figures 6 to 9 illustrate a handover in different Stages with otherwise identical representation. The chains are largely schematic. The take-away shoes and the driving lugs 86 are designed identically in profile, but the driving lugs 86 are the Chain pin 85.1 shown. As can be seen from these figures, Main transport chain 37 and bath chain 39 do not run parallel or almost parallel at any point, but rather are arranged crossing each other in different levels. This enables a quick handover. However, the tooth or wall profiles at the inlet are correspondingly to be rounded off so that the driving teeth can grip around the running transport rod 25 and on the other hand, the rod 25 can exit from the driving opening 83 of the driving shoe 80 or

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vice versa. Figures 5 and 7 show almost the same Current status of chain drivers and transport rod *

4 shows some essential parts of the inlet station 26 as they are arranged in mirror image on both sides. A guide wall 110 has a guide track 111, which is formed following a profile explained below. On the far left you can see a resting position depression 112, into which the end 25 * 2 of a transport rod 25, which is only shown in phantom here, is inserted in order to clamp the film. From this rest position trough 112, the track surface 111 first rises and then falls in its main part from up to an end position trough 114. This is, as the figure shows, the thickness of the transport rod compared to the track of the Tips of the side walls 8l of the driver shoes 80 set back, so that the transport rod 25 can be placed there without it being automatically lifted by the driver / as such would. In order to accomplish this, a lifting pawl 116 pivotable about the axis 115 is provided Has Einhebemulde 117 which is approximately aligned with the recess 114 in the rest position. A pawl driving pin 118 protrudes in the track of the driver shoe 80 of the main transport chain 37, so that when the driver shoe moves upwards the pawl is pivoted in the direction of the chain and

25th
lifts the transport rod / out of its end position trough 114 and presses it into the entrainment opening 83. A slide support piece 120 is provided to support the driving shoe 80, while the chain is also guided between slide tracks in this area.

In addition to the

as __

end of February 25th / the tasting

r guide way 111 is in the range of motion of the rod

ils tactile member.

.2 / the sensing finger 122 of a microswitch 123 is arranged . The trajectory for the spigot end is through here a guide track piece 124 set in such a way that the rod end 25-2 actuates the microswitch 123 when it is pushed through.

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The developing device described works essentially as follows:

To insert a cassette 24.1 with one to be developed Film 24 becomes a cover, not shown, of the light-tight Housing 22 is opened and the beginning of the film is attached to a transport rod 25. This is done with their Rod ends 25-2 are inserted into the rest position depressions 112 so that the axial locking plates 25-3 lie outside the wall 110 and so that the transport rod 25 is also axially fixed. If the clamps 25.4 are placed over the end of the film, then the transport rod 25 with the beginning of the film moves past the microswitch 123. As they slide between the surface 111 and the piece 124, the feeler finger 122 is pressed down so that the circuit 40 receives the switch-on pulse. The transport rod 25 is continued by hand until its ends 25.2 lie in the end position recesses 114. the The main transport chain 37, which is now running in the direction of travel 24.4, brings the next driver shoes 80 towards them. These press from below on the pawl driving pins 118 so that the lifting pawls 116 are pivoted about the axis 115 and the transport rod 25 lifts out of the end position recesses 114 with its latch recesses 117 and into the entrainment openings 83 of the two driving shoes 80 running synchronously on both sides presses. At the same time, the light barrier 43 is has been started and the light barrier carriage 44 moves, at a speed of about 400 mm / s equal to about 24 m / min transversely to the direction of travel 24.4 and its transmitter sends a pulsed infrared beam, which initially comes from the surface the anechoic material guide roller 46 is not reflected. As soon as the beginning of the film through the light barrier 43 arrives, the infrared beam is reflected according to the width and the receiver emits the corresponding Signals to circuit 40 which / width and pass length and thus processed together with the corresponding speeds by the circuit for further control can be. The film now follows the transport rod 25, which run from both sides

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the main transport chains 37 is guided via the sprockets 72.14 to the first transfer point, which is best shown in FIG is illustrated. Up to this point, the transport rod is supported on the wire support tracks 91.1 until it hits the surface the roller 30.1 arrives. Their ends 25. 2 continue to lie in the entrainment openings 83 of the entrainment shoes 82. On the roller 30.1 in Pig. 6 reached the state shown in which the transport rod is still only carried by the driver shoes 80 and the roller 30.1 but not by the wire support webs 91.1 or 91-3 is. In this state, the driver teeth 88 of the bath chain, as shown in FIG. 6, are shortly before the takeover "^"

position. The course of the main transport chain and the bath chain is coordinated so that when they continue to take over according to FIGS Place level within the locking plate 25-3, but next to the transport roller 30.1 and now the position of FIG. During the further course of both chains of the dragging slide 80 of the Badkette 39 rotates through the intersecting paths of motion in his below about 45 ° ^w below sloping track of the raceway, and thus leaves the end of the rod 25.2. Now, however, the driving teeth 88 of the bath chain 37 have taken over the transport rod 25 completely and alone. It also leaves the roller 30.1 and is now supported on both sides on the wire support strips 91-3 and pulls the film behind it over the roller 30.1 into the developer bath 27-1. The development takes place in this with precise adjustment of temperature and concentration during the run. The bath chain and film now run along the film path through the bath, around the lower deflection roller 29.1, the chain running around the chain wheels 74.2 and the transport rod 25 being on the support tracks S1 all the time . 3 supports.

./22

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It continues upwards to the deflecting and squeezing roller 30.2, which is shown in more detail in FIG. here you can only see the section through the roller, transport bar and Film in a position in which the transport rod 25 has just touched the roller. During their further run it gets under the squeegee roller 31 and lifts it because its bearing pins in the slots 33 are free to the top are movable, according to FIG. 11. Then the transport rod arrives in a position corresponding to FIGS. 6 and 7. In this the squeegee roller 31 has lowered again and now squeezes the developer from the film between itself and the deflection roller 30 so that the developer flows back into the developer bath. The bath chain 39 follows this movement from Transport rod 25 and film are not, but, as can be seen from Fig. 1, up to the sprocket 74.3 ran. At its intersection with the career path of the main transport chain 37, a handover has taken place like it corresponds to FIGS. 5 to 9, but in the reverse order. So now the main transport chain 37 leads with their Driving shoes ^ which were precisely matched in length, the transport rod 25 '.! Over the deflection and squeezing roller section to the bath chain 39.2 of the fixing bath 27.2. here a takeover takes place as it has already been explained with reference to FIGS. 5 to 9 and the rest of the run takes place accordingly. It is important to see here that each bath has its own bath chain and that the transport system does not have any bath liquid, especially not developer transported into the fixer, and that this carry-over to the through the film-related carry-over is limited and that a good squeeze is possible that of the transport system is not affected. After leaving the washing bath 27-3 and the corresponding transfer to the main transport chains 37 leaves the transport rod / aas sprocket 72.4 and actuates the switch 42. This acts via the circuit 40 on the drying device 63, which now starts up, the heating 63.1 switches on or switches to a higher output and the fan 63.2 also switches on.

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tet or switches to higher power. The transport rod now guides the film further along the chain path shown here corresponds to the film path, through the drying section in the drying device 63 and to the last transport rollers 66.1 and 66.2. From here the film passes to the device outlet 28 on a wire basket. '28 .1 or the like ... The transport rod 25 is made from the driver shoes 80 brought out by the fact that the main transport chains 37 run around the deflecting sprockets 72.12 and therefore the driver openings 83 are turned down, so that the transport rod 25 in free fall or by interconnects on the Outlet basket bars 28.1 is thrown. The transport rollers 66.1 and 66.2 pull the film 24 further through the device If at any previous point in time or at a later point in time the end of the film 24 the light barrier 43 has passed and thus no longer reflects a beam can be, the circuit 40 evaluates this signal and lets the device continue to run until the entire Film has left the device. In addition, the signals from the light barrier 43 are evaluated by the circuit 40 after determining certain flow areas and other entered values to activate pumps 58.1 and 58.2. and switch off in order to replenish the corresponding developer regeneration liquid and fixer regeneration liquid and thereby to keep the bath conditions the same. The temperature sensors 62 provide in connection with the Circuit 40 and the heater 61 for constant bath temperatures, while the pumps 60 ensure constant bath circulation. The washing bath is operated continuously.

20th

In summary, the development device / is to be described as follows:

The developing device 20 has developing bath 27-1, fixing bath 27.2 and soaking bath 27.3 - A main means of transport 37 guides a transport rod 25 with driver shoes from the insertion station 26 to a first transfer in which

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a bath traction means 39 with driving teeth 88, the transport rod 25 is detected. While the driver shoes 80 of the main transport traction device run on their own path, the bath transport traction device 39 guides the transport rod 25 and behind it the photosensitive material 24 through the developer bath and transfers the transport rod 25 in the area of the squeegee rollers 30, 31 the main transport traction means 37 and this in turn to a next bath traction means 39.2, so that no bath is carried over. After the last bath 27.3, the main transport traction means 37 takes over the transport rod 25 and guides it together with the photosensitive material 24 through a drying 6j> to the machine outlet 28.

The invention is not limited to the illustrated embodiment. It can mainly use other bathroom arrangements be made according to size and spatial allocation and the basic device structure and the barrel arrangement can be varied, especially if the machines are throughfeed for very long film lengths. However, this arrangement is important for medium-sized devices with bath carryover is of great importance. The transport system can also be modified for such devices. Instead of Chains, other traction means can be selected, such as flexible conveyor belts or ropes with appropriate coupling means. The continuation of the transport rod between one bath traction device and the other can also be carried out accordingly shaped gear. The drives of the individual rollers can also be used in other ways with the usual Drive systems or several appropriately synchronously driven and controlled traction means. Important is, that at least the developer bath has its own bath traction means which the transport rod only passes through the developer bath and then in circulation as it in the same developer bath

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immersed. It is advantageous to have the same arrangement in the fixing bath and, if necessary, in the washing bath. In this way, the main means of transport always remains dry and is
not exposed to as much aggressive chemicals as the bath traction device, which can be made from different materials than the main transport traction device.

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Claims (23)

FATENTANWALT-DIPU-l; NQ.-efeRD UTERMANN 3111076 71 HEILBRONN. PO1STfACH 3525VCABLE: PaYu. TEL. (07131) 82828 Kilianstrasse 7 (Kilianspassage) Deutsche Bank Hellbronn: 364364 Handelsbank Hellbronn: 23080 5 Krelsspärkasse Heilbronn: 7001 6 Postscheck Stuttgart: 43016-704 Patent and utility model - D 12. 32 D 6l auxiliary application March 20, 1981 / IS applicant: Company Dürr-Dental GmbH & Co. KG Etzelstrasse 8 Postfach 305 D-7120 Bietigheiro Designation: Development device with traction means transport claims 1.; Developing device (20) for photosensitive materials, which successively several treatment baths (27), such as Developing bath (27.1), fixing bath (27.2), rinsing bath (27.3), run through and with that on a transport rod (25) attached photosensitive material (24) along a predetermined film path from the machine gate (23) is drawn to the first bath inlet and through the baths (27) and between the individual baths (27) is guided over partitions (27.4, 27.5, 27.6, 27.7) and deflection devices (29, 30) and the transport rod (25) can be coupled at least partially to traction means (37, 39) guided along the film track, characterized in that at least in one treatment bath (27.1) only one in the respective Bath (27.I, 27.2, 27.3) only circulating bath traction means (39) is provided to which the transport rod (25) can be coupled and one outside of the liquid (27, 27.9) running at the bath inlet and at the bath outlet Transfer and possibly entrainment transport means is provided, to which the transport rod (25) can be coupled. .12 2. Development device according to claim 1, characterized in that the traction means (37, 39) suspension drivers (80, 86) are provided, in which the end areas (25-2) of the transport rod (25) are attachable. 3. Development device according to claim 2, characterized in that the suspension driver (80, 86) are designed as fork drivers open to one side transversely to the running direction (24.4; 90), the Opposite openings (83, 89) support members (30, 91) on which the transport rod (25) is supported. 4. Developing device according to claim 3 _5, characterized in that the support members are partly formed by support tracks (91) and partly by rollers, for example the deflecting rollers (30) for the photosensitive material (24) ₅ . 5. Development device according to claim 4, characterized in that that the support tracks are partly formed by housing walls and partly by wire supports (91) which are shaped parallel to the track of the transport rod (25). 6. Development device according to one of the preceding claims, characterized in that in Areas outside the working width (100) on each Side of the treatment bath (27) a bath traction means (39) revolves and as a transfer and take-away transport means outside the planes of rotation (104.1, 104.2) of the bath traction means (39) and the attack planes of the bath traction means drivers (86) and outside the baths (27, 27.9) running main transport traction device drivers (80) in the areas the transport rod ends (25.2) rotate. ./3 D 12. 32 D 61
3/19/81 / lS 7. Development device according to claim 6, characterized in that the main transport traction means (39) in planes (103.1, 103.2) outside the rod ends (25.2) and in the direction of the rod ends (25.2) have protruding driver shoes (80). 8. Development device according to one of the preceding claims, characterized in that the bath traction means (39) with over the outer running lines of the actual traction means (85) protruding, fork-shaped arranged driving teeth (88) are equipped. 9. Development device according to one of the preceding claims, characterized in that the Traction means (37> 39) are designed as chains and the driving teeth (88) as from the chain links (85, 87) Approximately at right angles protruding driving tab legs are formed. 10. Development device according to one of the preceding claims, characterized in that the ge (25) is a round rod in the area (25.2_)
its ends / is equipped with "support tracks (91, 110) associated with axial locking plates (25-3). 11. Development device according to one of the preceding claims, characterized in that in each bath (27.1, 27.2, 27-3) only has one deflecting roller (29.1, 29.2, 29 3), namely in the lower area, the outer radius of which corresponds to the inner radius of the orbit of the transport rod (25). 12. Development device according to one of the preceding claims, characterized in that over the deflection rollers (30) between the baths (27) and at the end of the soaking bath (27.3) loosely resting squeeze rollers (31) are provided, which are preferably guided in vertical housing wall slots (33). ./4 13. Development device according to one of the preceding claims, characterized in that the Transfer means of transport in the deflection areas at the inlet and outlet of the individual baths (27) are formed with the main transport traction means (37). 14. Development device according to one of the preceding claims, characterized in that the division of the main transport traction means driver (80) and the running length between the transfer points is matched to the pitch of the bath traction device driver (86) and the drives of the main transport traction means (37) and bath traction means (39) are synchronized with one another. 15 developing device according to one of the preceding claims, characterized in that only the main transport traction means (37) from a motor (38) is driven and in turn the pulleys and pulleys (30) and the bath transport traction means (39) drives. 16. Development device according to one of the preceding claims, characterized in that the Bad traction means (39) are link chains. 17. Development device according to one of the preceding claims, characterized in that the Main transport traction means (37) is formed with link chains. 18. Development device according to one of the preceding claims, characterized in that each Side only revolves around an endless main transport traction mechanism link chain (39). 19. Development device according to one of the preceding claims, characterized in that the Main transport traction means (39) the transport rod (25) D 12. 32 D 61 ' from the bath spout. of the last bath (27-3) transported through a drying station (63) to the device outlet (28). 20. Development device according to one of the preceding claims, characterized in that on Device inlet (23) an insertion station (26) for the transport rod (25) is provided, which has a pawl lifting mechanism (116) which, driven by the traction means (37), converts the transport rod (25) into a driver pair (80) introduces. 21. Development device according to claim 20, characterized in that the. Insertion station (26) a downwardly inclined lead-in track (111) with end position recesses (114) from which lifting pawls (116) the Lift out the transport rod (25). 22. Development device according to one of the preceding claims, characterized in that the Infeed station has rest position troughs (112) in which the transport rod (25) rests, while the photosensitive Material (24) is attached. 23. Development device according to one of the preceding claims, characterized in that between Rest troughs (112) and end position troughs (114) start the machine run when the transport rod (25) is moved through Sensing member (122) is provided.