MACHINE FOR THE TREATMENT OF THE PHOTOGRAPHIC FILMS

Abstract: In a machine for the developing of conventional photo­ graphic films, the group of the tanks (V) for the chemical treat­ ment thereof is provided in its upper side with a lateral extent (72), which is able to accommodate some groups of disc films (D), which are disposed onto a rotating support (SR) which in turn is supported by a support and transport element (S). A transport mechanism (TR) may be applied onto the said lateral extents (72) and is able to shift the disc films (D) which are applied onto the said groups of supports (S-SR), from the loading end portion (box 11) to the outlet side thereof (within a container 19), through the single relative chemical treatment tanks which are provided within the said lateral extents (72) and through a subsequent dripping and drying zone of the machine (box 16). This a transport mechanism (TR) may be interconnected to the main driving unit (6) by means of an electromagnetic clutch (42m), and comprises a first movable longitudinal member (40) vertically translatable and able to support slid­ ably the supports (S) and a second movable longitudinal member (41) horizontally translatable. The first movable lon­ gitudinal member (40) is actuated alternately by a couple of cams (42a-42b), synchronous each other, which act on the end portions of the longitudinal member (40) in a manner to shift the said support units (S-SR), together with the relevant disc films (D) arranged thereon, from a first lower position in which they result to be introduced into a relative tank, to a second upper position in which they result to be completely extracted therefrom, and vice versa. The second movable longitudinal member (41) is actua­ ted alternately by an intermittent oscillating crank and slotted link (43), which is driven by a crank, shifted in an intermittent manner by a partial gear wheel (43h), which is interconnected to one of the cams (42a) actuating the said first movable long­ itudinal member (40). The crank and slotted link (43) acts onto the said supports (S) when the latter result to be raised in the said first upper position by the said first movable longitudinal member (40), in order to shift them from a position situated over a tank to another one situated over the subsequent tank. At the end of each cycle, a transitory stopping is fore­ seen, for permitting the disc films (D) which are immersed into the respective chemical treatment baths to be submitted to the relative treatment which has been foreseen.

Description: The present invention relates to a machine for the treatment of photographic films comprising a part for the treatment of conventional films of per se known and since long time used kind, which is adequately arranged for the application of a new appliance for the treatment of those specific films having a circular disc form, which are commonly called "disc films" and used in a recent time and which therefore have not been yet widely diffused. Such a new appliance performs a normal series of treatments on the said disc films, which comprise the developing, bleaching, fixing and stabilization, among them adequate washing cycles are interposed, and which terminate with the drying of the photosensitive material. Besides, according to the present invention such a new appliance results to be particularly suitable and expressly conceived to be directly and optionally applied on a conventional appliance for the treatment of films for generic uses such as the 35 mm - films and the like, in order to obtain a considerable commercial and economic result. As it is already known, for the treatment of the new kind of disc film there have been developed and realized some appliances, such as those which have been described in the U.S. patents n. 4.112.452, 4.178.091, 4.252.430 and others, which appliances substantially perform the same succession of the treatment of the conventional films. Clearly, it isn't convenient to have available the specific appliances for the treatment of the disc films only, which are utilized in a relatively limited manner, as already specified, with respect to the conventional ones and this is the reason for which additionally solutions such as that one described in the U.S. patent n. 4.502.772 have been proposed, in which an appliance for the disc film treatment has been described, wherein such an appliance may operate independently and be also eventually interconnected to a conventional appliance for the treatment of commonly utilized films. According to such a solution, the two appliances are completely independent and practically it is foreseen a conventional appliance for the tratment of the usually utilized films and a specific appliance for the treatment of the disc films only, which are reciprocally placed side by side and interconnected in an adequate manner, so as the treatment liquids only of the first appliance will be utilized for the second appliance too. It becomes evident that such a solution, still permitting to obtain a practical utilization of the so resulting unit, does not attain the aim to have not only the size minimized but also the components thereof, as well as the relevant manufacturing and assembling prices. Therefore, the scope of the invention is that to have a maximum rationalization of an entire appliance, which at the same time may perform treatments both of conventional and disc films, with overall dimensions and components thereof which are minimized, so permitting a global cheaper appliance to be obtained. This is obtained by means of the machine as claimed in Claim 1, in which it is foreseen the use of a normal machine for the treatment of conventional films, which machine is arranged for the eventual application of a kinematic operated unit for the transport of disc films therein. Such a machine is characterized in that the tanks containing the chemical baths for the different stages of chemi­ cal treatment only are shaped with a limited lateral extent in their upper part, which extent is able to receive support elements for the transport of groups of disc films, and in that it may be applied a mechanism on the said lateral extent, if requested, which mechanism is able to transport at least one of the said support ele­ ments for the transport of group of disc films, from a specific loading box to the outlet towards a collecting container, the said groups of disc films being adequate­ ly assembled on rotating supports which permit the rota­ tional movement of the discs, requested during the diffe­ rent treatment stages, to be obtained directly from the already existing movement of the liquid contained within the different treatment tanks and, during the dripping stage, from a suitable air jet; wherein the end drying is finally performed in a suitable container, in which a part of the same hot air which is utilized in the main machine for the developing of conventional films is introduced therein. In order to understand in a better manner the features and the advantages of the machine of the present inven­ tion, the same will be hereinafter described in detail, in a preferred embodiment thereof by way of a not limi­ ting example only and with reference to the enclosed drawings, in which: _ fig. 1 shows a perspective view of the outer structural configuration of the machine according to the present invention; _ fig. 2 shows a perspective view, as fig. 1, of the same machine whose envelope however is indicated in part only with a thin line, so as to permit the inner structural items thereof related to the sole part concer­ ning the treatment of the disc films to be illustrated; _ fig. 3 is a part of fig. 2, which is adequately enlarged for illustrating more in detail solely the transport me­ chanism of the disc films and the general driving unit; _ fig. 4 is a side view taken from the treatment side of the disc film, which schematically illustrates the moving path of the latter from the loading to the unloa­ ding side, together with a part of the foreseen transport mechanism thereof as well as the arrangement of the lightproof movable diaphragms and the survey devices for the positioning of the support elements for the transport of the groups of said disc film; _ fig. 5 shows an exploded perspective view of a single support element for the transport of a group of disc films, which is constituted by a rotating support on which the said disc films are applied and by a transport element on which the said rotating support is applied; _ fig. 6 shows a partial transversal cross section of one of the tanks for chemical treatment, a support element for the transport as illustrated in fig. 5, which is completely assembled and provided with some disc films applied on it, and which is immersed into the liquid of the bath for the chemical treatment; _ fig. 7 shows a cross section along the line I-I of the fig. 6 of the support element for the transport of the disc films, which has been illustrated in the former fig. 5 and 6, and of the system for the rotating driving of the respective rotating support. Referring particularly to the fig. 1, it is to be firstly pointed out that the main structure of the machine 1 com­ prises an outer structure constituted by an envelope forming in its inner side a light-proof part, in which the appliances for the treatment of the photosensitive material are disposed. In addition, by examining the machine 1 from its front side (which is illustrated at the left part of such a figure) it is to be noted that it comprises a portion S1 (at the left side) and a portion S2 (at the right side) which are placed side by side each other, wherein the portions S1 and S2 respectively permit the treatment of conventional and disc films to be performed. Still examining the fig. 1, it is to be noted that such a structure is then subdivided in several parts end more precisely in the front side of the machine at the front right angle thereof it is disposed the box 11, adequate­ ly raised with respect to the ground, which box acts for the starting handling of the magazines both for the conventional and disc films, at a lightless condition, and which box comprises a light-proof front door 111 and also the light-proof hoses 112, as well as a box 12 at a left side and placed side by side thereof, which acts for loading the conventional films into the respective treatment portion S1. In turn, the box 12 is provided with a ligh-proof cover 121 at the upper side thereof and additionally a control panel 13 is directly disposed below the loading box 12. A further box 14 is projecting towards a back side with respect to the front side referred to, in which inner side there are contained the appliance for the chemical treatments of the conventional films and that one for the chemical treatment of the disc films. The box 15 acting for the drying operation of the portion S1 is situated upon the box 14, at the left side thereof, wherein the box 15 is projecting at its back end portion towards the drying box 16 of the portion S2, so forming a "L"-shaped structure as it may be seen. Moreover, at the front side of the box 15 it is disposed the box 17 acting as outlet side of the material which has been treated within the portion S1, wherein the box 17 comprises an angular module 18 for returning such a material, which is able to convey the same material to its right end portion from which the material may coming out for being collected in a suitable manner. At the front side of the box 16 it is provided a box-li­ ke container 19, which is able to receive a suitable num­ ber of support elements S-SR for the transport of the disc films D at the outlet of the said box 16 and at the end of the treatment which has been performed on the respective portion S2 thereof. Such box-like container 19 is provided with an adequate door 19a in its upper side, in order to permit the ope­ rator to extract therefrom the said support elements for the transport of the disc films, which are storing therein during the operation of the machine. Therefore, as the general configuration of the machine has been completely described, now it is described the inner part of the machine which is clearly illustrated as a whole in the fig. 2, 3 and 4. From such figures it is to point out firstly the group of tanks V for storing the different liquids which are utilized for the chemical treatment of both the conven­ tional and disc films. Such tanks are reciprocally disposed side-by-side and longitudinally aligned according a conventional succes­ sion arrangement of the treatment stages, in the follo­ wing manner: a development tank SV, two bleaching tanks SB, a washing tank L1, two fixing tanks FS, two washing tanks L2, a stabilization tank ST. The succession arrangement of two tanks in which the same treatment stage SB, FS, L2 occurs, depends on the specific time required by it for being performed. It is to point out that each tank is basically constitu­ ted by a first portion forming an envelope 71, having a substantially parallelepiped shape with a rectangular cross-section, at the upper side of it a lateral projecting part 72 with a limited height is extending therefrom, in correspondence of one of the shorter sides of the same envelope, wherein the lateral projecting part 72 is joined, on the bottom side thereof, to a wall 73 which is inclined toward the said first portion 71, the whole thus forming a sole basin. The said first portion 71 is reserved for the treatment of the conventional films, which will be carried out in a conventional manner and by utilizing per se known appliances, which are neither illustrated nor described for a clear and simple explanation thereof. On the contrary, the said second portion 72 is reserved for the treatment of the disc films. On the side constituted by the group of the lateral pro­ jecting parts of the tanks it is disposed a transport mechanism TR, in order to shift from a tank to another one adequate support elements S on which respective ro­ tating supports SR for the disc films are applied. As it may be particularly seen from the fig. 5, 6 and 7 the support elements S are constituted by a slidable plate 20, from the upper portion of which an arm 21 is orthogonally projecting, which arm is provided near its end portions with two plates 22a and 22b, which are pa­ rallel to the said slidable plate 20 and thence between them. In addition, in each plate 22a, 22b near its respective free end portion a slotted hole 23a, 23b is provided, which is able to receive the lateral pins 31a and 31b of the said rotating support SR which will be hereinafter described, wherein the pins are passing through adequate lateral slits which are inclined toward the free end portion of the respective plate 22a, 22b, so permitting the rotating support SR to be rotatable supported by the lower end portions of the said slotted holes 23a, 23b. Obviously, the said rotating support SR may be rotata­ ble supported on the said support S also in other dif­ ferent manners, equivalent to that one which has been described and to which reference is made. The said slidable plate 20 presents a substantially rectangular outline, whose front upper corner 24 (by considering the shifting direction of the support S when it is applied onto the transport device TR) is bevelled in a suitable way for the reasons which will be hereinafter described. Moreover, a notched band 25 is provided at the face of the slidable plate 20 which is opposite to that one from which the arm 21 is exten­ ding and about at a half lenght of it, practically in correspondence of the zone in which such an arm 21 is extending therefrom, wherein the notched band 25 is extending from the upper to the lower side of the face referred to as well as in a direction which is orthogonal with respect to these sides. Finally, a longitudinal slot 26 is provided in an axial direction with respect to such a notched band 25. Also the functions of the said notched band 25 and said longitudinal slot 26 will be hereinafter described. The rotating support SR results to be formed by two bla­ ded discoidal elements 30a and 30b, equal each other, each of them is constituted by a disc 301 provided with radial blades 302 on a side thereof and having, for obvious reasons, a diameter which is somewhat greater than that one of the disc films D. On a first discoidal element 30a it is fixed a shaft 31 which presents a lenght slightly greater than the di­ stance resulting between the outer faces of the plates 22, wherein such a shaft 31 is projecting from the face of the relative disc 301, which face isn't provided with radial blades 302, with a short portion constituting the stud 31a. On the contrary, surf a shaft 31 is projecting on the opposite side thereof with a first portion 31c having a suitable diameter, permitting it to be inserted into the central holes of the relative disc films D and a lenght which is sufficient to permit a good number of such disc films D to be applie on it. A second portion 31d of such a shaft 31 has a diameter which is somewhat smaller than the first one, and is able to receive removably a second discoidal element 30b, which is arranged thereon with the relevant bladed portion which is turned toward the inner side of the support SR, (which portion is opposite to that one of the previous discoidal element), wherein the said second portion 31d presents such a lenght that, after the application of the second discoidal element 30b, it results to be protruding from this a bladed portion with a short portion constituting the stud 31b. In addition, the portion 31c is provided with a longi­ tudinal projection 31r able to engage itself with cor­ responding slots, provided within the central holes of the disc films D so as to prevent the rotation of the same with respect to the shaft 31. Therefore, it appears evident the utilization of the whole support S. One inserts one or more disc films D on the shaft 31 (in the practical embodiment thereof it is foreseen the application on the support S at most of six disc films), and thereafter the discoidal element 30b. The so resulting unit (support SR completely assembled) is applied onto the support S by introducing its lateral studs 31a and 31b into the relative slotted holes 23a and 23b, provided onto the plates 22a and 22b, in which the studs penetrate until they are arranged on the bottom side of the same, so resulting rotatable supported. The support and transport element S-SR is thus ready for being utilized. The particular conformation of such a support and transport element S-SR permits to obtain remarkable operational advantages with respect to the different equivalent systems which are utilized in other devices or machines for the treatment of disc films. In fact, as already known, for the treatment of the disc films it is required that the films be rotated as they are immersed into the different treatment baths and thereafter, as they are leaving such baths, the so-called dripping stage, the same must be effected by means of a centrifugation operation and therefore also during this stage the films must be rotated. In the various machines which have been till now utilized for treating the disc films, the required rotational movement is given to the disc films by means of kinematic operated systems, which obviously are complicated. Such systems normally require more moving sources (motors) as well as complicated systems for transmit­ ting the movement, having different moving parts-like belts, pulleys, gears, bearing etc. which are operating immersed into the treatment baths, so that these parts must be executed by using particular techniques and suitable materials. By using the solution in the machine according to the present invention there are avoided all the kinematic operating devices, which are employed for rotating the above specified disc films and this is obtained by utilizing at least a fluid jet, which determines the rotation of the rotating support SR through a suitable arrangement thereof toward the radial blades 302 of the same support. As already known, the liquids contained within the different treatment tanks are moved by means of respective pumps, so that, as it is provided in the machine referred to and clearly illustrated particularly in the fig. 7, in order to obtain the rotation of the support SR and therefore of the disc films which are disposed thereon, it is sufficient to utilize such a moved liquid coming from the feeding tube 33, by directing it to act against the radial blades 302 of the rotating supports SR, through an adequate nozzle 34 which is disposed and oriented in a suitable manner. Clearly, instead of a sole fluid jet it may be foreseen a pair of jets, which are acting on both the bladed discs of the rotating support SR. On the contrary, for the "dripping" stage the rotation thereof may be obtained by means of an air jet which is procuced by a simple fan VE and oriented in a suitable manner by a relative nosepiece B (see the fig. 2 and 3). Still considering the machine referred to, the transport of the said support and transport elements S-SR through the different treatment tanks V is obtained by means of a new transport mechanism TR, which is hereinafter described. Such a transport mechanism TR is constituted by a first movable longitudinal member 40, which is able to support slidably the said supports S and results to be vertically translatable, by guiding it through adequate vertical guide elements (not shown) and by a second movable longitudinal member 41, which is horizontally translatable by guiding it in a suitable manner and supporting it by the sliding blocks 41a-41b, which are slidably engaged on it and result to be fixed on the fixed longitudinal member 44 by means of the lateral supports 41d-41e, which determine also the adequate arrangement of the same member over the said first movable longitudinal member 40, wherein the said first movable longitudinal member 40 results to be able to shift the said supports S from a first lower position, in which they result to be introduced into a relative treatment tank, to a se­ cond upper position in which they result to be completely extracted therefrom. In turn, the said second longitudinal member 41 results to be able to shift the said supports S, when the same find themselves in a raised condition at the said second upper position, from a tank to another one, over the re­ spective tank. As it is clearly evident from the fig. 2,3 and more spe­ cifically from the fig. 6, the said first movable longi­ tudinal member 40 has a structure with an asymmetric "U" cross-section, so forming in practice a groove with its lower part, in which groove the slidable plate 20 of the supports S may slide, and is provided with some cavities 40a, which permit the guide plates 45 hereinafter descri­ bed to pass therealong. The vertical translation of the said first longitudinal member 40 is obtained by means of two cams 42a and 42b, which are situated near its end portions and on which the said longitudinal member 40 is supported, wherein such cams 42a-42b result to be corrected, through re­ spective shafts 42c-42d rotatable supported by the fixed longitudinal member 44, to the toothed pulleys 42e (not shown in fig. 2) and 42f, which are reciprocally interconnected through a toothed belt 42g, so that the movements of the said cams 42a-42b result to be synchro­ nous. It is to point out that an additional cam 42r coaxially disposed with respect to the cam 42b, is fixed onto the shaft 42d, in which additional cam the flat spring 42 is engaged with its free end portion, wherein the flat spring 42 is fixed with its other end portion to the block 42t, which in turn is fixed to the lateral support 41e. The function of this group (42r-42s) is that to obtain a resilient accompanying condition of the descent move­ ment of the first movable longitudinal member 40, so as to prevent any too rapid and uncontrolled falling thereof due to the shape of the cams 42a-42b, and the consequent drawbacks caused by the same. On the contrary, the horizontal translation of the said second longitudinal member 41 is obtained by means of an intermittent crank and slotted link 43. Such an intermittent crank and slotted link 43 results to be constituted by the rigid rod 43a, which is pivoted at its lower end portion on the fixed longitudinal member 44 by means of the pin 43b, wherein the oscillating move­ ment of the rod 43a is commanded by a crank, whose crankpin 43d is engaged into the slot 43e provided at an intermedia­ te portion of the said rigid rod 43a and whose crank arm (not visible in the fig. 2) is fixed to the sprocket wheel 43 g, which receives the intermittent movement of the partial gear wheel 43h, whose toothing is extended for about 1/3 of its circumference only, and which is fixed to the front end portion of the shaft 42c. Finally, the said rigid rod 43a is provided at its upper end portion with a slot 43i, in which the pin 41c fixed onto the said second longitudinal member 41 is engaged. Moreover, on the front end portion of the shaft 42d it is fixed a further pulley 42h, which is connected trough the toothed belt 42i to the pulley 42p, which in turn may be driven by the main driving unit 6 by means of the electromagnetic clutch 42m. Pursuing to describe the transport mechanism TR, it is to be noted that the said fixed longitudinal member 44 results to be fixed to the structure of the group of the tanks V by means of the lateral supports 44a and that onto the longitudinal member 44 there are fixed the guide plates 45, which are reciprocally equally spaced as much as the width of the single tanks and are provided in the same amount as the tanks, wherein such guide plates are located at the level of the transversal axis of each tank and result to be vertically disposed and orthogonally extended from the inner surface of the said fixed longi­ tudinal member 44 as well as partially protruded from the structure of the said first longitudinal member 40. The function of such guide plates 45 is that to guide the vertical translation of the supports S, which is commanded by the said first longitudinal member 40, which in turn is provided, as already described, with respective cavities 40a in correspondence of each guide plate 45, permitting it to pass therealong during its movements. Moreover, also onto the said second longitudinal member 41 there are fixed tongues 41p which are also vertically disposed and orthogonally extended as well as turned toward the inner side therefrom, which tongues are re­ ciprocally equally spaced as much as the said guide pla­ tes 45. The function of such tongues 41p is that to command the shifting of the said supports S from a tank to ano­ ther one. Finally, it is to be noted that in the machine referred to it is provided a main driving unit 6 only, which drives, as it is described in detail hereinafter, all the different kinematic operating devices of both the portions S1 and S2. Such a main driving unit 6 comprises a sole motor M which, in its driven condition, by means of an adequate transmission system, reduction gear R, couple of helical­ geers 51, couple of toothed pulleys 52-53 interconnected by the toothed belt 54, rotatably drives the main shaft 55 which in turn results to be connected to the treatment apparatus of the portion S1, so operating the same directly. In addition, the gear wheel 56 is assembled onto such a main shaft 55 and is connected by the chain 57 to the gear wheel 58,which is fixed onto the shaft 59, onto which a helical gear 60 engaging itself with the helical gear 61 is also fixed, wherein the helical gear 61 is fixed onto the shaft 62, onto which the toothed pulley 63 is also fixed. Therefore, it follows that in the operating condition of the apparatus of the portion S1, also the toothed pulley 63 is rotatably driven thus driving the toothed belt 64, interposed between the said toothed pulley 63 and the toothed pulley 65 which is situated in the upper part of the box 16. As it will be hereinafter described, such a toothed belt 64 acts for translating upwardly the supports 16, contai­ ned within the box 16, to which the said supports are coming after the chemical treatments have been effected, as well as acts for carrying these supports at the outlet zone thereof. Clearly, the toothed belt referred to results to be always driven when the apparatus of the portion S1 is operating. Finally, the shaft 59 is connected by means of the cou­ ple of gear wheels 66-67 to the electromagnetic clutch 42m, so that the apparatus of the portion S2 i.e. the above described transport mechanism TR thereof will be only operating when such an electromagnetic clutch 42m has been commanded. At the end portion of the shaft 55 it is provided a sui­ table connection element (not shown in the figures refer­ red to), onto which a crank may be applied for permitting, in the case in which the electrical supply is accidentally switched off, to continue to move manually the whole kine­ matic operating devices for shifting the photosensitive material under treatment, so as to avoid the destruction thereof. Besides, between the said connection element and the shaft 55 it is disposed a coupling permitting a driving in a so­ le direction to be obtained, like an already known free­ wheel device, which disconnects for obvious reasons the mechanical correction to the part driven by the geared motor M-R. In the case only in which the disc films treatment group is applied thereto, it is also provided a buffer battery which is able to feed, in the above mentioned case of electrical supply switching off, the microprocessor which is provided, as it ill be hereinafter described, for operating and controlling the cycles and all the other functions of the machine (safety, different signaling, alarm devices, etc.) as well as the electromagnetic clutch 42m. In this manner, the manually operated emergency control may command both the kinematic operating devices for the transport of the conventional films under treat­ ment within the portion S1 and those ones of the trans­ port mechanism TR of the disc films under treatment within the portion S2. In order to complete the description of the machine, it is to be noted that the box 11 for the starting han­ dling of the magazines of the different film kinds also acts for loading the portion S2, so that it will be provided with a suitable lightproof door 11a (see fig. 4), which permits the supports S-SR together with the relative disc films D to be introduced into the re­ levant treatment part. In addition, also further lightproof movable diaphragms are provided: a movable diaphragm E is disposed on the front wall of the box 16, in correspondence of the outlet side of the supports S which are coming from the chemical treatment part of the machine and another movable diaphragm U is disposed within the dripping room situated before the drying zone of the machine, in correspondence of the outlet side of the supports S which are coming from the dripping zone thereof. In order to effect an accurate control and co-ordination of the whole cycles and different functions of the machi­ ne, it is provided a specific microprocessor, which is adequately programmed for processing the different signa­ lings coming from the different command, control, signa­ ling, survey devices as well as positioning devices for different parts, etc. Among these devices there are hereinafter described at least some micro-switches (or similar survey devices), which are clearly illustrated by the fig. 2,3 and 4 and result to be required in order to have a clear explanation of the description of the operation of the machine, as it will be afterward done. _ A first micro-switch T1 is situated in correspondence of the door 11a and acts for giving a suitable acoustic and/or luminous signaling when the said door 11a is open. _ A second micro-switch T2 is situated in correspon­ dence of the first cavity 40a of the longitudinal mem­ ber 40, within the so-called room "waiting place" PA, and it acts for giving a luminous and/or acoustic si­ gnaling for signaling that a group S-SR for the support and transport of the disc films D has been loaded, as well as it acts for permitting the starting of the trans­ port cycles until the group S-SR is introduced into the dripping room. _ A third micro-switch T3 is situated in correspondence of the second cavity 40a of the longitudinal member 40 and therefore of the first tank SV; it acts for switching off the signaling which has been produced by the inter­ vention of the former micro-switch T2, controls the in­ crement of the regeneration developing acid into the tank SV, in order to compensate any increased request on such acid due to the presence of the additional disc films, and also changes the stopping time provided for the operating cycles by adjusting the same to the reque­ sted treatment of these films. _ A fourth micro-switch T4 is actuated by the cam 42a when the latter has completed an entire rotation; it switches off the electromagnetic clutch and acts for gi­ ving an alarm acoustic and/or optic signaling, in the case in which a starting failure of the transport opera­ tion occurs. _ A fifth micro-switch T5 is situated in the lower part of the box 16 and is actuated by the presence of a sup­ port group S-SR, which enters into the dripping zone of the machine directly after having left the chemical treatment zone thereof; it operates the fan VE for a time period which is determined by the said microproces­ sor and, after a further time period determined by the microprocessor, it releases an alarm signal for signaling that the group S-SR hasn't been evacuated. _ A sixth micro-switch T6 is situated in the upper end portion of the drying box 16 and positioned in such a manner therein that it may survey the presence of a support group S-SR as the latter is being uncoupled from the raising toothed belt 64, and after a time period which is always determined by the microprocessor it re­ leases a recall signal to inform the operator of such a presence. _ Finally a seventh micro-switch T7 is situated at the initial zone of the box-like container 19, in order to act for giving an alarm signal when the said container results to be completely filled. A concise description of the machine operation will be now given hereinafter. At the beginning, the operator effects the normal handling, if requested, of the conventional films within the box 11 and then their loading into the respective portion S1. On the contrary, for the disc films he introduces into such a box 11, through the door 111, the relative maga­ zines thereof together with at least one of the above described supports S and the relative rotating supports SR, then he opens the magazines by operating through the hoses 112 and inserts a convenient number of disc films D onto the shafts 31 of the rotating supports SR. After that, he completes each single rotating support SR with the relevant discoidal element 30b, then applies it onto the corresponding support S and the so completed unit is prepared for being loaded into the portion S2. Then, he opens the door 11a and applies the unit S-SR-D onto the said first longitudinal member 40 by introducing the plate 20 of the relative support S thereof into the cavity provided into the said first longitudinal member 40, by arranging it therein in such a manner that at the same time the first guide plate 45 penetrates into the longitudinal slot 26 of the same plate 20. Thus, the support S is disposed in the so-called "wai­ ting place" PA at the beginning of the treatment ap­ paratus and is ready for the starting of the operating cycle. Then, the operator closes the said door 11a by switching off the signaling of the relevant micro-switch T1 and, as soon as he surveys on the control panel that all is in order, since the micro-switch T2 of the waiting place signals that the loading has been effected, starts the operation of the apparatus of the portion S2. The starting control operates the electromagnetic clutch 42m (and also the motor M, if the same isn't operating) which connects the apparatus of the transport mechanism TR to the main driving unit 6, so that the cams 42a-42b start to rotate, by shifting the said first movable lon­ gitudinal member 40 upwardly and therefore also the support S which has been loaded at the initial part thereof. When the said first longitudinal member 40 results to be disposed upward, the plate 20 of the support S results to be disengaged from the plate 45 and inserted between two tongues 41p of the said second movable longitudinal member 41. At the same time, also the partial gear wheel 43h rotates and as soon as the said cams 42a-42b have sufficiently shifted the said first movable longitudinal member 40 upward, the toothed portion of the said partial gear wheel 43h begins to engage the sprocket wheel 43g so causing the same to be rotated As a consequence thereof, the crank which is connected to the sprocket wheel 43g causes the rigid rod 43a to be oscillated, which rod in turn operates the said second movable longitudinal member 41, during the first oscil­ lation stage, in such a manner as to shift it forward with respect to the direction in which the treatment is carried out, by a lenght which is equal to the width of a single tank. It follows that the support and transport unit S-SR, which results to be raised and not more engaged with its longitudinal slot 26 with respect to the first guide plate 25, but rather inserted between the to first tongues 41p of the said second longitudinal member 41, is pushed by the first of the said tongues 41p which is bearing against the rear side of its slidable plate 20, so that such an unit is shifted from the waiting place to a positon situated over the first tank SV, in correspondence of the centre thereof. By continuing in their rotational movement, the cams 42a-­ 42b operate the said first longitudinal member 40 downward, so that the support unit S-SR descends and penetrates into the first tank SV, by disengaging it from the tongues 41p and at the same time engaging it with the second guide plate 45, which penetrates in its longitudinal slot 26, so ensuring as described hereinbefore the right arrange­ ment thereof at the centre of the tank SV. As soon as the support S has been disensaged from the tongues 41p, the rigid rod 43a begins doing the second oscillation stage (in a direction which is opposite than the first one), thus operating the said second movable longitudinal member 41 to come back in its starting po­ sition, and at the same time the flat spring 42s engages itself with the protruded part of the cam 42r, so that the remaining down stroke of the longitudinal member 40 results to be controlled and resiliently dampened, by avoiding in this manner an effective dropping movement due to the outline of the cams 42a-42b and therefore the relevant drawbacks thereof. At the end of the cycle, the toothed portion of the par­ tial gear wheel 43h disengages itself from the sprocket wheel 43g and at the same time the cam 42a (see fig. 4) actuates the micro-switch T4 which, by means of the microprocessor, svwitches off the electromagnetic clutch 42m by stopping in this manner the cycle for a time period required by the relative treatment stage and by releasing, in the case of a starting failure of the transport a suitable alarm signaling. Simultaneously, the support S actuates the micro-switch T3, at the end of its down stroke, which micro-switch switches off the signaling "occupyed waiting place", always by means of the microprocessor, as well as controls that a suitable increment of developing acid be introduced into the relevant tank SV, so as to com­ pensate the greater request thereof due to the additional disc films and it also changes the stopping time period of the cycles, to adjust the same to the treatment need of the disc films. Therefore, the kinematic operated unit of the transport mechanism TR is ready for repeating another cycle. Hence, a succession of cycles will be carried out, which cycles permit that the transport of the support unit S-SR through the series of tanks for the chemical treatments be effected, wherein the rotating supports SR contained within these tanks are rotated, as already described, together with the relative disc films D which have been applied on the same, by means of the effect of the liquid which is oriented against the respective bladed discoidal elements 30a-30b and is passing through the nozzles 34, during the stopping periods which are foreseen at the end of each cycle. When the support unit S-SR reaches the last tank ST, at the end of the relevant stabilization cycle thereof, it is opened the said movable diaphragm E so that the said support unit S-SR is introduced, due to the effect of the transport mechanism TR, into the dripping room pro­ vided within the box 16 and arranged in a manner in which the notched band 25 provided in its plate 20 is disposed side-by-side with respect to the toothed belt 64 and at the same time it actuates the micro-switch T5. At this point, the movable diaphragm E is operated in its closed position and the fan VE is also operated, for an appropriate time period, by means of the micro-­ switch T5 and always under the control of the micro­ processor. In this manner, such a fan VE generates an air jet which is oriented by the nosepiece B against the radial blades 302 of the rotating support SR, so causing the latter to be rotated. Thus, it is obtained the dripping of the disc films D arranged thereon, by means of a centrifugation of the same films. Then, the sliding block P is operated in such a manner as to push the upwardly moving portion of the toothed belt 64 against the plate 20 of the support S. Thus, the toothed belt 64 engages itself with its toothed portions with the corresponding toothed portions of the notched band 25 provided onto the said plate 20, and consequently the support unit S-SR is entrained upward, while being at the same time guided by means of guide elements (not shown), in which the said plate 20 is engaged. Then, the support unit S-SR passes through the diaphragm U and automatically opens it, so entering into the upper zone of the box 16 in which circulates the same hot air of the drying zone of the treatment portion S1, which air is drawn from such a drying zone and blown into the said drying zone of the treatment portion S2 of the disc films D, by means of a fan (not shown) which is placed on the wall which divides the to drying zones. In this manner, during the transit within such an upper zone the disc films D arranged onto the support S are dried. The movable diaphragms E and U are synchronized each other, in such a manner that when a diaphragm is open, the other one is certainly closed. Particularly, the movable diaphragm E is always operated in an opened position by the cam 42b at the end of each operating cycle, still remaining open for the whole stop ping time period of the cycle. The unit S-SR is passing through the diaphragm U only when the movable diaphragm E becomes closed, at an operating sequence which is normally foreseen. The support unit S-SR continues its stroke until it comes in correspondence of the upper end portion of the toothed belt 64 (pulley 65), where it automatically disengages itself from the latter while remaining practically in a still position, and in this position it actuates the micro-switch T6 which, after an appropriate time period always determined by the said microprocessor, permits a suitable acoustic (and/or luminous) signaling to be released, in order to inform the operator that this unit must be drawn. When a second support unit S-SR arrives, the previous unit S-SR which is still as described is ulteriorly pushed upward and during such a displacement the beve­ led front upper corner 24 of its plate 20 bears against a suitable inclined plane (not shown), which causes the same to be shifted toward the front part of the machine, so that is passes along the box-like container 19 inwhich it is stored. As it may be seen from the fig. 2 and 4, at the begin­ ning part of the box-like container 19 the micro-switch T7 is located, whose control lever is shifted during the passage of each single support unit S-SR, so coming back sudden in its starting position, and this opera­ tion is repeated until the same box-like container 19 has been filled (in the machine referred to a storage of three support units S-SR is foreseen), wherein the last of the support units S-SR keeps such a lever in a deviated position so that after a time period determined by the microprocessor it operates a suitable acoustic (or eventually luminous too) alarm signaling, which informs the operator that the units S-SR stored within the said box-like container may be extracted therefrom, by opening the door 19a. Evidently, in addition to the above mentioned different lightproof movable diaphragms, doors etc. further light intercepting devices may be foreseen, which devices are able to prevent the totally light penetration therethrough, particularly in the chemical treatment zone in which the photosensitive material may be altered. From what it has been described there appear evident the advantages which may be obtained by utilizing the machine referred to. In fact, such a machine fundamentally is con­ stituted by a conventional machine for the treatment of the conventional films, which machine forms the base structure which is so arranged that an unit for the treatment of the disc films may be applied optionally thereon, which unit results to be simple and easily applicable. The recirculation of the liquids for the chemical treat­ ments toward the respective tanks is already arranged, in a manner that it acts against the rotating supports SR, onto which the disc films D to be treated are dispo­ sed, in order to produce the requested rotational move­ ment thereof. It follows that the addition of the treatment part of the disc films D does require neither hydraulic pity connections nor additional pumps. The system which is used for rotating the disc films D results to be very simple and reliable, so that any complicated mechanical connection among the supports of the said disc films D to be rotated and the outer driving sources can be avoided. Finally, the transport unit TR of the disc films D does not require an autonomous driving source, since it may be simply interconnected to the main driving unit 6 which has been already provided for the base structure. It is well understood that different embodiments of the machine referred to may be produced, however without departing from what it has been described and hereinafter claimed, with reference to the enclosed drawings and therefore pertaining to the protection field of the present industrial invention.

Claims: 1. Machine for the treatment of the photographic films, basically constituted by a per se known machine for the treatment of conventional films, comprising usually a lightproof room in which a plurality of tanks for the chemical treatments is disposed and a drying room for the said conventional films as well as means for transporting these films through the different che­ mical treatment stages and the following drying treatment thereof, from an inlet side of the said room for the chemical treatments to the outlet side of the said drying room, the said tanks for the chemical treatments being constituted by substantially parallelepiped con­ tainers, which are open on their upper part and equal each other as well as disposed side-by-side along their greater sides, so as to form a sole global unit always having a parallelepiped shape, which is formed by a suitable series of tanks able to permit an usual suc­ cession of chemical treatment stages to be performed, the whole being already per se known, the said machine being also arranged for permitting a system for the treatment of disc films too to be eventually applied thereon, the machine therefore being characterized in that on a side of the plurality of tanks (V) each sin­ gle tank (71) comprises, in its upper part, a suitable limited lateral extent (72) able to receive a rotating support (SR), which in turn is applied to a relevant support (S), the said rotating support (SR) being able to support at least one disc film (D); a suitable tran­ sport mechanism (TR) being applicable, if requested, onto the said lateral extent of the plurality of tanks (V), which mechanism may be interconnected to the main driving unit (6) of the machine and is able to transport at least one support (S) together with the relative rotating support (SR) and the disc films (D) to be treated, which are arranged thereon, from a specific loading box (11) through the successive chemical treatment baths which are contained within the said lateral extents (72) of the said tanks (V), and therefore through a suitable dripping and drying box (16), to the outlet side of the said drying box (16) when the treatment is finished, while storing this support (S) in a suitable container (19), the said rotating supports being so shaped as to be rotatable driven directly by the movement of the liquid of the respective bath, at the single stages of chemical treatment thereof and by an air flow which is genera­ ted and oriented in an appropriate manner, during the dripping stage thereof; wherein the end drying of the said disc films is obtained by means of a part of the air coming from the drying box of the treatment portion (S1) of the conventional films, which air is blown into the respective drying box (16); wherein operation, control, survey, driving means are provided and co-ordi­ nated and programmed by an adequate microprocessor; and wherein, finally, also manually operated means are provided and operable in the case of an incidental switching off of the electrical supply voltage, which means are able to permit a complete evacuation or a partial evacuation thereof, at least limited to the developing bath of the materials under treatment, to be effected; an auxiliary supply voltage being also pro vided for permitting, in the above described case, at least the operation of the microprocessor to be con­ tinued as well as the device (42m) which interconnects the said transport mechanism (TR) to the main driving unit (6) to be operated. 2. Machine according to claim 1, characterized in that the said supports (S) comprise a substantially rectan­ gular plate (20), in whose upper part an arm (21) is laterally extending therefrom, which arm is provided, near its respective end portions, with two plates (22a-22b) which are able to support rotatably a rotating support (SR). 3. Machine according to claims 1 and 2, characterized in that the said rotating supports (SR) are constituted by two bladed discoidal elements (30a-30b), which are removably fixable, coaxially each other, onto the end portions of a shaft (31) on which some disc films D may be disposed between the said bladed discoidal elements (30a-30b); the end portions of the said shaft (31) which are protruding from the said bladed discoidal elements (30a-30b) resulting to constitute the studs (31a-­ 31b) for applying the said support (S) onto the said plates (22a-22b). 4. Machine according to claim 1, characterized in that the said transport mechanism (TR) comprises a first movable longitudinal member (40), which is able to translate vertically and alternately for shifting the said supports (S) from a first lower position, in which they are introduced into the said lateral extents of the tanks (V), to a second upper position in which they re­ sult to be completely extracted therefrom, as well as comprises a second movable longitudinal member (41) which is able to translate horizontally and alternately and is appropriately disposed over the said first movable longitudinal member (40), for shifting the said supports (S) from a position situated over a tank to another one situated over the subsequent tank, when these supports (S) find themselves in the said second position. 5. Machine according to the preceding claims, characte­ rized in that the said first movable longitudinal member (40) is operated, alternately and vertically, by two cams (42a-42b) which are disposed at its end portions, and the said second movable longitudinal member (41) is operated alternately and horizontally by an intermit­ tent oscillating crank and slotted link (43), which is kinematically interconnected to one of the said cams (42a or 42b) and is acting on the said second movable longitudinal member (41),when the said first movable longitudinal member (40) finds itself in the said se­ cond upper position. 6. Machine according to claims 1, 2, 4 and 5, characteri­ zed in that the said first movable longitudinal member (40) is constituted by an "U"-shaped section, which is open in its upper part, and in which the said plates (20) of the supports (S) may penetrate and longitudi­ nally slide therein. 7. Machine according to claims 1, 2, 4 and 5, characterized in that the said second movable longitudinal member (41) is provided with tongues (41p), which are disposed in such a manner as to result to be arranged respective­ ly near the front and back side of the plate (20) of the said support (S), when the latter finds itself in the said second upper position, the said tongues (41p) being able to bear against the back side of the said plate (20) during the first stage of the alternating movement of the said second movable longitudinal member (41), which is caused by the first stage of oscillation of the said intermittent oscillating crank and slotted link (43), so as to determine the said support (S) to be shifted from a position situated over a tank to another one situated over the subsequent tank. 8. Machine according to claims 1 and 3, characterized in that the said rotating supports (SR) are rotatably driven, when they result to be immersed into the respective chemical treatment tanks, by at least a jet of the respective chemical treatment liquid, which is oriented against at least one of the said bladed discoidal elements (30a-30b) through at least one nozzle (34), which is fed by the liquid under move­ ment in each chemical treatment tank, and on the con­ trary, when they are situated within the dripping room, by an air jet which is generated by a fan (VE) and is oriented through a nosepiece (B) against the said bla­ ded discoidal elements (30a-30b).

Inventors: ROBERTO, MARSON
Applicants: GRETAG SAN MARCO S.P.A.
Application year: 1987
Main classification: G03D3
IPC codes: G03D3