EP0352720B1 - Durchlaufentwicklungsmaschine für fotografisches Blattmaterial - Google Patents

Durchlaufentwicklungsmaschine für fotografisches Blattmaterial Download PDF

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Publication number
EP0352720B1
EP0352720B1 EP89113661A EP89113661A EP0352720B1 EP 0352720 B1 EP0352720 B1 EP 0352720B1 EP 89113661 A EP89113661 A EP 89113661A EP 89113661 A EP89113661 A EP 89113661A EP 0352720 B1 EP0352720 B1 EP 0352720B1
Authority
EP
European Patent Office
Prior art keywords
unit
processing
processing machine
machine according
bath
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89113661A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0352720A2 (de
EP0352720A3 (en
Inventor
Filipp Lamprecht
Richard Dr. Piock
Siegfried Tasser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Durst Phototechnik AG
Original Assignee
Durst Phototechnik AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Durst Phototechnik AG filed Critical Durst Phototechnik AG
Priority to AT89113661T priority Critical patent/ATE100949T1/de
Publication of EP0352720A2 publication Critical patent/EP0352720A2/de
Publication of EP0352720A3 publication Critical patent/EP0352720A3/de
Application granted granted Critical
Publication of EP0352720B1 publication Critical patent/EP0352720B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D3/00—Liquid processing apparatus involving immersion; Washing apparatus involving immersion
    • G03D3/08—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material
    • G03D3/13—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material for long films or prints in the shape of strips, e.g. fed by roller assembly
    • G03D3/132—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material for long films or prints in the shape of strips, e.g. fed by roller assembly fed by roller assembly

Definitions

  • the present invention relates to a continuous processing machine for photographic material, in particular sheet-shaped photographic paper, comprising an input device for dad exposed sheet material, a plurality of bath containers arranged one behind the other for receiving different treatment baths and transport means for conveying the material through the baths.
  • Development machines of this type are known and are available on the market in various designs which are mainly based on the required performance, that is to say the number of copies to be produced per unit of time. Development machines for copy shops or professional photo laboratories, where high productivity is required, are complex and expensive and the purchase price and the operating costs are unaffordable for the amateur or professional photographer who wants to process his pictures himself.
  • the known development machines are also mostly designed for a specific treatment process, so that different machines are required for processing material with different treatment processes. This contradicts the requirements of an amateur who works with different materials and processes or who just wants to keep the way open for experimenting with new materials.
  • DE-A 32 09 262 discloses a development device with a plurality of bath containers which have essentially the same structure with one another and can be connected to one another. There are transport rollers inside each container arranged, which, in cooperation with appropriate guiding means, form a circular, closed orbit for the material being conveyed, which passes through the bath repeatedly until it reaches the container exit after the operator has changed a deflecting element.
  • the arrangement enables the dwell time of the material in each bath to be regulated in accordance with the treatment time prescribed for a particular process. This brings greater flexibility with lower device costs, thanks to the possibility of adapting the device to different treatment processes.
  • the device is not suitable for automatic operation with continuous input of the material to be treated because of the discontinuous passage of the material through the successive treatment units.
  • the adjustable treatment times By limiting the adjustable treatment times to a multiple of the material's circulation time in the closed orbit, the programmability of various processes is also limited.
  • the dynamic coupling of the transport rollers of the individual units to a common drive is relatively complex and complicates the disassembly of the device into its individual components or its assembly, so that the advantages of the inherently flexible construction of the device are partially lost.
  • the object of the invention is to realize a development machine of the type mentioned at the outset, which can be adapted to different treatment processes, for which it delivers consistently satisfactory results and which is distinguished by simple, space-saving construction and low manufacturing costs.
  • this task is accomplished by a developing machine solved with the features specified in the characterizing part of claim 1.
  • a variable number of individual treatment units of the same structure can be connected to one another and to an input unit, so that a custom-made development machine can be formed for a particular treatment process. Due to the form-fitting nature of the connecting parts, the individual units and the developing machine itself can be disassembled and assembled easily and quickly and without the aid of tools.
  • a screw conveyor in the treatment bath which is driven by the same motor for the material transport, forms an effective and at the same time inexpensive circulating agent for the bath, because it eliminates the need for an actual circulating pump.
  • the development machine shown in Fig. 1 comprises an input unit A and two treatment units B and B ', only a fragment of the latter being visible in the drawing.
  • the input unit comprises a box 1 with a lid 2, which in turn has a hinged lid 3 as access to the inside of the box for the input of a sheet.
  • the box In its upper area, the box has a pair of feed rollers 4-4 ', which conveys an inserted sheet to an exit opening 5 and through this into the inlet channel of the subsequent treatment unit.
  • a contact plate 6 points the sheet into the nip, while guide vanes 7 protruding from the inside of the cover 2 feed the sheet leaving the rollers to the exit.
  • Edge projections 8 and 9 of the hinged lid 3 interact with form-fitting edge parts 10 and 11 of the box or the lid and prevent the light from entering the box when the lid is closed.
  • the treatment unit B has a trough-shaped container 12 with a front wall 13, a rear wall 14, end walls 15 and 16 and a curved bottom 17.
  • the container is suitable for holding a certain amount of treatment liquid and is provided with an overflow, not shown in the figures, which determines the maximum fill level of the bath.
  • an overflow not shown in the figures, which determines the maximum fill level of the bath.
  • rollers consisting of pairs of rollers 18-18 ', 19-19', 20-20 ', 21-21' and 22-22 ', which are arranged so that they have a continuous path for the sheet material to be treated Form from the inlet side through the treatment bath to the opposite outlet side.
  • a separate baffle 31 has the sheet emerging from the treatment bath to the pair of rollers 22-22 'on the outlet side, which, in contrast to the others, lies outside the liquid bath and has the function of a pair of squeeze rollers, with which liquid residues are removed from the sheet material before it enters a next treatment phase is transferred.
  • the central area of the container is filled by a screw conveyor 32, which is rotatable about an axis of rotation 33 and causes a liquid circulation in the direction of the axis of rotation, the liquid flow in the area of the screw conveyor in one direction and in the area of the tank bottom the backflow in the opposite direction .
  • the transport rollers and the screw conveyor are supported at the ends in end shields 35 and 36, which are held together by the packing elements 25 to 30, at the ends of which they are anchored.
  • the roller system and the screw conveyor form a structural unit, which is releasably carried in the container by means of suitable guide and holding means.
  • a removable cover 37 covers the container 12 upwards, but leaves an inlet or outlet channel open on the front and on the rear container wall for the sheet material to be treated.
  • the cover 37 has on the input side on its inside guide ribs 38, the profile of which is shaped such that an incoming sheet is directed onto the first pair of transport rollers.
  • the cover 37 has ribs 39 on the outlet side in such an arrangement that a sheet is guided to the outlet when it has finished its passage through the treatment bath and leaves the pair of nip rollers.
  • the lid 37 has a projection on the inside, the curved surface 40 of which surrounds the part of the screw conveyor 32 lying outside the bath in a shell-like manner and dips into the bath with the end parts 41 and 42 on both sides of the screw conveyor. In this way, the contact of the treatment liquid with the ambient air is kept to a minimum and premature degeneration of the bath due to oxidation is prevented.
  • the treatment unit is designed in such a way that several units that are identical to one another can be assembled into different device configurations, depending on the type of treatment process envisaged.
  • the rear wall 14 of the container 12 has an envelope 43 at the upper edge, which fits in shape and position in the upper edge of the front wall 13.
  • a container is thus connected to a second, the same, by hanging the envelope of the rear wall of the first in the front wall of the second, as illustrated in Fig. 1 in relation to the treatment units B and B '.
  • the cover 37 at the rear end has an edge projection 44 which fits in shape and position in a corresponding groove 45 along the front edge of the cover, so that when the cover is closed, the rear edge projection 44 into the groove 45 'of the cover 37' of a subsequent treatment unit B 'intervenes.
  • the input unit A can be connected to a treatment unit B because it has the same connection elements on the output side as the treatment unit itself.
  • the drive of the transport rollers and the screw conveyor can be seen from FIG. 2 in conjunction with FIG. 3.
  • the roller journals protrude from the end of the end shield 36 and are provided with gear pairs 46-46 ', 47-47', 48-48 '49-49' and 50-50 'for each pair of rollers.
  • the pairs of gears are in engagement with one another via intermediate gears 51 to 54, which are rotatably mounted on fixed bolts 55 to 58 of the end shield 36.
  • the gear pair 46-46 'of the first pair of rollers is engaged by a further gear 59, which is rotatable about a fixed pin 60 and in turn meshes with a gear 61, which is rotatable about a fixed pin 62 and in the case of connection of the treatment unit to the input unit drives a corresponding gear pair of the feed rollers 4-4 'of the input unit.
  • a multi-stage gear 63 is rotatably mounted in the upper part of the end shield 36 about a fixed bolt 64.
  • Two rotatably connected gears 65 and 66 are rotatable about a common pin 67 in such a position that one engages in the step gear 63 and the other in one of the intermediate gears 51 to 54, whereby the transmission of movement from the step gear to the transport rollers is established.
  • the pin 67 is optionally displaceable in one of several holes 68 to 71 arranged on the end shield and provided with a thread, the gear wheels 65 and 66 of the gear pair rotating around the pin depending on the position of the pin in the step gear 63 at a specific step and engage a specific one of the intermediate gears 51 to 54.
  • the bolt 67 is seated in the bore 71, which is therefore not visible in the drawing.
  • the axial distance between the gears 65, 66 is adjustable.
  • the outer gear 65 is displaceable on a support sleeve 72, which has suitable locking elements.
  • the individual bores 69 to 71, each of which defines a position for the gear pair 65, 66 correspond to as many gear ratios and thus different rotational speeds of the transport rollers. The feed rate of the material to be treated can thus be changed from one position to another simply by moving the pin of the gear pair 65, 66.
  • the screw conveyor 32 is driven from the step gear 63 via a gear 73 on the axis of rotation of the screw.
  • the gear 73 is preferably interchangeable in order to enable the engagement in the step gear 63 optionally on one of the two innermost steps and thus to achieve two different rotational speeds of the screw conveyor.
  • a drive unit 74 (FIG. 2) comprises an electric motor 75, on the rotary shaft 76 of which a gear 77 is seated, which meshes with the step gear 63 from above.
  • the drive unit 74 also forms a removable modular unit which can be connected to the treatment unit by means of suitable connection elements in its housing.
  • the housing rests on a bearing surface 78 protruding from the end wall 16 of the container 12 and is held on this by means of an eyelet hook 79 which extends from the housing bottom and engages in an eyelet 80 of the bearing surface.
  • a longitudinal groove 81 in the housing base fits into a strip-shaped elevation 82 of the support surface, so that a light-tight connection with the end wall 16 of the container is created.
  • a wall extension 83 of the housing rests on the end shield 36 and has an envelope 84 at the lower end, which receives an edge projection 85 of the cover 37 in the closed position.
  • the power supply circuit 86 for a heating coil 87 which is part of the modular, removable unit and is immersed in the treatment bath, is also accommodated in the housing of the drive unit.
  • FIG. 4 shows the drive unit in a simplified cross section and restricted to the parts for illustrating the mutual connection of drive units of successive treatment units.
  • the housing of the drive unit has an extension 88 at the front at the bottom, which receives the plug 89a of an electrical connector, while the housing on the rear side has a step 90, which is adapted in shape and position to the extension 88 , which receives the socket 89b of the same connector.
  • the plug and socket of the same drive unit are electrically connected to each other.
  • the arrangement is such that when the drive units of two successive treatment units are connected, the backward withdrawal 90 of one drive unit matches the front extension 88 'of the other and the plug 89a engages in the socket 89b, as a result of which the electrical connection between the two drive units is established.
  • the input unit has a similar withdrawal 90 'on the output side, which in turn receives a socket 89'b of the connector and fits into the extension 88 of a subsequent drive unit.
  • the connector of the input unit is connected to a power supply cable, so that with the connection of several, to successive treatment units belonging drive units and the input unit with a first treatment unit, the electrical power supply for the entire device is automatically established.
  • a switch on the input unit is therefore the main switch for the electrical parts of all treatment units.
  • the top wall 91 of the housing of the drive unit has a longitudinal groove 92 at the front edge and an edge projection 93 at the opposite end, which form positive connection elements for successive units.
  • the bottom 94 has a groove 95 into which an elevation 96 of the bearing surface 78 fits (FIG. 2).
  • the electric motor 75 is a synchronous motor running at the mains frequency, which ensures that the feed speed of the sheet material is rigorously the same in the individual treatment units. Equipping each treatment unit with its own drive unit has the advantage, among other things, that the electric motor is to be dimensioned exclusively with regard to the individual unit, regardless of the number of treatment units joined together. The same applies to the heating device, which is also dimensioned after the bath of the individual treatment unit.
  • the combination of the electric drive and the heating device to form a removable modular drive and heating unit results in a complete separation of the electrical parts from the rest of the device with obvious advantages in terms of care and maintenance of the device.
  • the preceding description shows how the individual treatment unit consists of a bath container, a roller unit, a drive and heating unit and a cover part is composed and how a plurality of identical treatment units composed in this way can be connected to one another and to an input unit.
  • the assembly begins with the treatment unit, which is ultimately intended to form the end of the device, and continues to the preceding units until the input unit is placed last on the device head side.
  • the disassembly of the device begins with the removal of the input unit and continues in sequence to the final unit. It should be noted that the mandatory sequence of placing the input unit last and removing it first ensures that all treatment units are de-energized during the assembly and disassembly of the device, since only the input unit can be connected directly to the network .
  • the development machine is composed of the input unit and two treatment units, of which the first contains a developer solution and the second wash water, preferably running water, which flows in via an inlet and flows off via the overflow.
  • the treatment unit with the developer bath is followed by a treatment unit with a bleach-fix bath and the latter again by the washing unit.
  • Other treatment processes for coloring material require separate baths for bleaching and for fixing, so that a further treatment unit is added.
  • Other processes may involve an even greater number of separate treatment phases and may require the addition of further treatment units with appropriate treatment solutions.
  • An additional unit specially set up for this purpose can be connected to the watering unit be provided as a dryer for the sheet material after the washing phase.
  • the treatment times can be adapted to the different processes by changing the throughput speed of the material to be treated by selecting the appropriate transmission ratio in the drive of the transport rollers, as described above.
  • the exposed sheet passes through the successive treatment units in a light-protected path, so that with the exception of the sheet input, the entire workflow can take place in the bright room.
  • the input unit also offers space for a whole sheet and the hinged lid can be closed as soon as the sheet is gripped by the feed rollers.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Photographic Developing Apparatuses (AREA)
EP89113661A 1988-07-25 1989-07-25 Durchlaufentwicklungsmaschine für fotografisches Blattmaterial Expired - Lifetime EP0352720B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89113661T ATE100949T1 (de) 1988-07-25 1989-07-25 Durchlaufentwicklungsmaschine fuer fotografisches blattmaterial.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT484488 1988-07-25
IT8804844A IT1224924B (it) 1988-07-25 1988-07-25 Macchina sviluppatrice continua per materiale fotografico in formato.

Publications (3)

Publication Number Publication Date
EP0352720A2 EP0352720A2 (de) 1990-01-31
EP0352720A3 EP0352720A3 (en) 1990-09-12
EP0352720B1 true EP0352720B1 (de) 1994-01-26

Family

ID=11114874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89113661A Expired - Lifetime EP0352720B1 (de) 1988-07-25 1989-07-25 Durchlaufentwicklungsmaschine für fotografisches Blattmaterial

Country Status (6)

Country Link
US (1) US4922276A (ja)
EP (1) EP0352720B1 (ja)
JP (1) JP2851308B2 (ja)
AT (1) ATE100949T1 (ja)
DE (1) DE58906803D1 (ja)
IT (1) IT1224924B (ja)

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US5432581A (en) * 1992-03-02 1995-07-11 Eastman Kodak Company Rack and a tank for a photographic processing apparatus
US5418592A (en) * 1992-03-02 1995-05-23 Eastman Kodak Company Rack and a tank for a photographic processing apparatus
US5249449A (en) * 1992-04-23 1993-10-05 Reynolds Metals Company Can necking apparatus with spindle containing pressurizing gas reservoir
GB9226483D0 (en) * 1992-12-18 1993-02-10 Kodak Ltd A hollow rotary drum processor
US5452043A (en) * 1993-02-19 1995-09-19 Eastman Kodak Company Rack and a tank for a photographic low volume thin tank insert for a rack and a tank photographic processing apparatus
US5506653A (en) * 1993-04-14 1996-04-09 Spillane; John D. 58 second color print processor
US5379087A (en) * 1993-04-27 1995-01-03 Eastman Kodak Company Processing apparatus
US5418591A (en) * 1993-05-03 1995-05-23 Eastman Kodak Company Counter cross flow for an automatic tray processor
US5347337A (en) * 1993-05-03 1994-09-13 Eastman Kodak Company Vertical and horizontal positioning and coupling of automatic tray processor cells
US5400106A (en) * 1993-05-03 1995-03-21 Eastman Kodak Company Automatic tray processor
US5386261A (en) * 1993-05-03 1995-01-31 Eastman Kodak Company Vertical and horizontal positioning and coupling of automatic tray processor cells
US5420659A (en) * 1993-05-03 1995-05-30 Eastman Kodak Company Modular processing channel for an automatic tray processor
US5398094A (en) * 1993-05-03 1995-03-14 Eastman Kodak Company Slot impingement for an automatic tray processor
US5389994A (en) * 1993-05-03 1995-02-14 Eastman Kodak Company Closed solution recirculation/shutoff system for an automatic tray processor
US5400107A (en) * 1993-05-03 1995-03-21 Eastman Kodak Company Automatic replenishment, calibration and metering system for an automatic tray processor
US5381203A (en) * 1993-05-03 1995-01-10 Eastman Kodak Company Textured surface with canted channels for an automatic tray processor
US5701540A (en) * 1996-09-30 1997-12-23 Eastman Kodak Company Photographic processor and improved filter assembly
US5778272A (en) * 1996-09-30 1998-07-07 Eastman Kodak Company Photographic processor and method of operation
US5753111A (en) * 1996-09-30 1998-05-19 Eastman Kodak Company Photographic processor and improved filter assembly
US5781820A (en) * 1996-09-30 1998-07-14 Eastman Kodak Company Photographic processor and method of operation
US5822644A (en) * 1996-09-30 1998-10-13 Eastman Kodak Company Photographic processor and method of operation
US5778274A (en) * 1996-09-30 1998-07-07 Eastman Kodak Company Photographic processor and method of operation
US5761561A (en) * 1996-09-30 1998-06-02 Eastman Kodak Company Photographic processor and method of operation
US5790914A (en) * 1996-09-30 1998-08-04 Eastman Kodak Company Photographic processor and method of operation
US5771417A (en) * 1996-09-30 1998-06-23 Eastman Kodak Company Photographic processor and method of operation
US5749017A (en) * 1996-09-30 1998-05-05 Eastman Kodak Company Photographic processor and method of operation
EP1403693A1 (de) * 2002-09-24 2004-03-31 Agfa-Gevaert AG Anordnung zum Bestimmen des Antriebsverhaltens eines Transportsystems für ein fotografisches Material sowie Verfahren hierzu

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US3345928A (en) * 1965-06-08 1967-10-10 Vivian D Krehbiel Flexible material transport mechanism
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DD134998B1 (de) * 1978-03-15 1980-08-27 Pentacon Dresden Veb Einrichtung zum zufuehren lichtempfindlicher fotografischer blaetter in ein behandlungsgeraet
US4255039A (en) * 1979-09-12 1981-03-10 Hope Henry F Photographic film and paper processing equipment
US4439033A (en) * 1981-11-04 1984-03-27 Ciba-Geigy Ag Drum-containing apparatus for ready processing and handling of photographic material
DE3209262C2 (de) * 1982-03-13 1984-05-10 Walter 7515 Linkenheim-Hochstetten Dennig Einrichtung zum Entwickeln von blatt- oder streifenförmigem Farbfotopapier
HU188540B (en) * 1983-12-23 1986-04-28 Schneider,Laszlo,Hu Phototechnological apparatus for continuous developement of phototechnological materials
US4647173A (en) * 1985-02-12 1987-03-03 Ciba-Geigy Ag Apparatus for the liquid-processing of light-sensitive sheet material

Also Published As

Publication number Publication date
ATE100949T1 (de) 1994-02-15
JPH0268553A (ja) 1990-03-08
DE58906803D1 (de) 1994-03-10
JP2851308B2 (ja) 1999-01-27
EP0352720A2 (de) 1990-01-31
EP0352720A3 (en) 1990-09-12
US4922276A (en) 1990-05-01
IT1224924B (it) 1990-10-29
IT8804844A0 (it) 1988-07-25

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