EP0933678A1 - Flüssigkeitsbehandlungsgerät für Blattmaterial - Google Patents

Flüssigkeitsbehandlungsgerät für Blattmaterial Download PDF

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Publication number
EP0933678A1
EP0933678A1 EP98200282A EP98200282A EP0933678A1 EP 0933678 A1 EP0933678 A1 EP 0933678A1 EP 98200282 A EP98200282 A EP 98200282A EP 98200282 A EP98200282 A EP 98200282A EP 0933678 A1 EP0933678 A1 EP 0933678A1
Authority
EP
European Patent Office
Prior art keywords
drive
sheet material
processing
drive transfer
housing
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.)
Withdrawn
Application number
EP98200282A
Other languages
English (en)
French (fr)
Inventor
Bart c/o Agfa-Gevaert NV IIE 3800 Verhoest
François c/o Agfa-Gevaert NV IIE 3800 Joos
Dirk c/o Agfa-Gevaert NV IIE 3800 de Ruijter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agfa Gevaert NV
Original Assignee
Agfa Gevaert NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Agfa Gevaert NV filed Critical Agfa Gevaert NV
Priority to EP98200282A priority Critical patent/EP0933678A1/de
Publication of EP0933678A1 publication Critical patent/EP0933678A1/de
Withdrawn legal-status Critical Current

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    • 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
    • G03D3/10—Liquid processing apparatus involving immersion; Washing apparatus involving immersion having progressive mechanical movement of exposed material for plates, films, or prints held individually
    • 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
    • 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
    • G03D3/135—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 between chains or belts, or with a leading strip
    • G03D3/137—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 between chains or belts, or with a leading strip provided with transport speed regulation

Definitions

  • This invention relates to an apparatus for the processing of sheet material, in particular the liquid processing of photographic sheet material, such as X-ray film, pre-sensitised plates, graphic art film and paper, and offset plates. More particularly the invention relates to improvements in apparatus in which photographic material is transported through one or more treatment units.
  • a processing apparatus for photographic sheet material comprises several vessels each of which contains a treatment liquid, such as a developer, a fixer and a rinse liquid.
  • a treatment liquid such as a developer, a fixer and a rinse liquid.
  • sheet material includes not only photographic material in the form of cut sheets, but also in the form of a web unwound from a roll.
  • the sheet material to be processed is transported through these vessels in turn, by transport means such as one or more pairs of drive rollers, and thereafter optionally to a drying unit.
  • the time spent by the sheet material in each vessel is determined by the transport speed and the dimensions of the vessel in the sheet feed path direction.
  • An apparatus for the liquid processing of sheet material is known, for example from European patent application 93200502.8 (Agfa-Gevaert NV, filed 23 February 1993) which comprises a housing and a number of removable racks located within the housing.
  • the housing includes a drive device for driving sheet material along a sheet material path in a processing direction through the apparatus and first drive transfer means.
  • Each rack includes a pair of rollers forming a nip therebetween which defines part of the sheet material path through the apparatus and second drive transfer means co-operating with the first drive to transfer means transfer drive from the drive device to the rollers.
  • Such an apparatus is constructed with removable racks for the purpose of the ease of maintenance. While racks may be replaced when necessary, any new rack must carry out the same or similar function as the replaced rack.
  • EP 622676 (Eastman Kodak Company) describes a processor comprising a housing having at least one modular wall structure for dividing the housing into a plurality of fluid processing chambers. A modular processing device is placed in at least one of the processing chambers for circulating a processing fluid placed in the chamber.
  • the first drive transfer means comprises two first drive transfer members adapted to be driven by the drive device at different velocities and the second drive transfer means comprises second drive transfer members so positioned to cooperate with one or other of the two first drive transfer members according to the desired function of the processing module.
  • an apparatus for the processing of sheet material comprising:
  • the housing is preferably divided by internal partial walls into a number of compartments into which the processing modules are fitted.
  • the housing may be in two parts, having a base portion and a removable lid.
  • the top edge of the base portion is preferably above the static liquid level, to reduce the risk of leakage when the apparatus is idle.
  • the worm drives and associated drive device are best mounted in the base portion, because of the short tolerance necessary between the worm drive and the worm gears.
  • the drive device is preferably constituted by a drive motor and associated gear box, adapted to drive the two first drive transfer members in opposite rotational directions.
  • a DC or brush-less AC motor is suitable.
  • the gear box associated with the drive motor may be adjustable to cause the drive transfer members to rotate in the same rotational direction, if occasionally so required.
  • two drive motors can be used, for example located one at each end of the housing, together with suitable controls to enable the drive motors to cause the first drive transfer members to be driven as required.
  • the apparatus will define a generally horizontal sheet material path there-through.
  • a vertical or inclined configuration is also possible.
  • the sheet material path will generally be substantially straight.
  • the processing modules may conveniently comprise a sub-frame so shaped as the fit into compartments within the housing, the rotatable members being carried by the sub-frame. In this way the module may be removed from the housing and replaced without fear of disturbing the spacial relationship between the rotatable members.
  • the two first drive transfer members comprise two worm drives coupled to the drive device in such a manner as to rotate at different speeds and/or in different directions.
  • the rotatable member may comprise a shaft, the second drive transfer member comprising a worm gear positioned on the shaft to receive drive from one or other of the worm drives.
  • the processing module will comprise two rotatable members, forming a nip therebetween which defines part of the sheet material path through the apparatus, each rotatable member having an associated second drive transfer means.
  • the processing module comprises two drive rollers, the second drive members associated with the drive rollers being so positioned as to engage a first of the first drive transfer members thereby to drive sheet material along the sheet material path in the processing direction.
  • the drive rollers may each comprise a rigid core carrying a covering of elastomeric material, the core being secured to a drive roller shaft on which a second drive transfer member is located.
  • the drive rollers may be sealed by the provision of fixed or rotatable sealing members.
  • the use of sealing rollers carried in bearings secured to, or integral with, the associated sub-frame is preferred.
  • the sealing roller may have a diameter less than that of the drive roller.
  • the sealing roller may have a diameter which is from one tenth to one third of the diameter of the drive roller, thereby enabling the torque which needs to be applied to be further reduced.
  • the sealing roller preferably extends in a straight line parallel to the associated drive roller axis and preferably contacts the surface of the associated drive roller at a location which is between 45° and 315°, most preferably between 135° and 225° from the centre of the nip, on the fluid side.
  • the sealing roller may be formed of a material having a coefficient of friction (as measured against stainless steel) of less than 0.3, preferably from 0.05 to 0.2, for example highly polished metals such as steel, especially Cr-Ni steel and Cr-Ni-Mo steel, a metal coated with Ni-PTFE (NIFLOR - Trade Mark), a polymer material such as PTFE (poly tetra fluoro ethylene), POM (polyoxymethylene), HDPE (high density polyethylene), UHMPE (ultra high molecular weight polyethylene), polyurethane, PA (polyamide), PBT (polybutyl terephthalate) and mixtures and composites thereof.
  • a material having a coefficient of friction (as measured against stainless steel) of less than 0.3 preferably from 0.05 to 0.2
  • highly polished metals such as steel, especially Cr-Ni steel and Cr-Ni-Mo steel, a metal coated with Ni-PTFE (NIFLOR - Trade Mark)
  • a polymer material such
  • the drive rollers and the sealing rollers should be mounted between end plates of the sub-frame in a leak-proof manner.
  • intermediate cells between each pair of processing cells to avoid leakage of treatment liquid from one processing cell to another.
  • the intermediate cells may include leakage trays so positioned that any treatment liquid which passes through the nip between the drive rollers drips into the leakage tray, for collection and recirculation as desired.
  • Intermediate cells may provide a dead space where diffusion reactions can occur on the sheet material as it passes there-through.
  • the processing cells which are defined between the sealed drive roller modules may include intermediate processing modules comprising unsealed rollers which may be driven rollers, or non driven rollers for breaking the laminar fluid at the surface of the sheet material as it passes through the apparatus.
  • Typical drive rollers have a core provided with a covering of elastomeric material, although it is possible for a roller to be elastomeric throughout its cross-section.
  • the elastomeric material covering preferably has a thickness of between 1 mm and 30 mm.
  • the elastomeric material may be selected from ethylene/propylene/diene terpolymers (EPDM), silicone rubber, polyurethane, thermoplastic rubber such as Santoprene (Trade Mark for polypropylene/EPDM rubber), styrene-butyl rubber and nitrile-butyl rubber.
  • the hardness of the elastomeric material may be between 15 Shore (a) and 90 Shore (a), as measured on the roller surface.
  • the core has a flexural E-modulus of between 50 GPa and 300 GPa.
  • Suitable materials for the rigid core include metals, such as stainless steel, non-ferrous alloys, titanium, aluminium or a composite thereof.
  • the core is hollow. Alternatively the core may be solid.
  • the rollers may be biased together by a variety of methods.
  • the rollers may be biased together for example by making use of the intrinsic elasticity of the elastomeric material, by the use of fixed roller bearings.
  • resilient means such as springs which act on the ends of the roller shafts.
  • the springs may be replaced by alternative equivalent compression means, such as e.g. a pneumatic or a hydraulic cylinder.
  • the processing module comprises a rotatable sheet contacting member and a rotatable backing member, the second drive transfer member associated with the sheet contacting member being so positioned as to receive drive from a second of the first drive transfer members to drive the wiping member in a rotational direction opposed to the processing direction.
  • the sheet contacting member may comprise a brush having fibres mounted on a core secured to a wiping member shaft, a second drive transfer member being located on the brush shaft.
  • the sheet contacting member may alternatively comprise a sheet wiping cloth, formed of a soft material such as cotton, mounted on a core secured to a wiping member shaft, a second drive transfer member being located on the wiping member shaft.
  • the rotatable backing member may comprise a rigid roller carried on a backing member shaft, a second drive transfer member being located on the backing member shaft.
  • the second drive transfer member associated with the backing member is so positioned as to both receive drive from the first drive transfer member thereby to rotate the backing member in the processing direction.
  • module carries, for example, rotating brushes and backup rollers instead of drive rollers, is it not necessary to seal these brushes and backup rollers to the sub-frame, when processing modules including sealing means are positioned both upstream and downstream of the brush carrying module.
  • the construction of the apparatus enables the easy modification of the apparatus according to the function which it is desired to perform.
  • the invention also provides a method of modifying a sheet material processing apparatus to perform a different processing function.
  • the apparatus essentially comprises a housing including a drive device for driving sheet material along a sheet material path in a processing direction through the apparatus, and two first drive transfer members adapted to be driven by the drive device at different velocities; and at least one removable processing module located within the housing, the module including a pair of rotatable members forming a nip therebetween which defines part of the sheet material path through the apparatus, and a second drive transfer member so positioned to receive drive from one of the two first drive transfer members to transfer drive from the drive device to the rotatable members.
  • the method of modifying the apparatus comprises removing the processing module from the housing by disengaging the second drive transfer member from the first drive transfer member and replacing removed processing module with another processing module having a second drive transfer member so positioned to receive drive from the other of the first drive transfer members.
  • the apparatus is coupled to an imaging device which is able to output imaged photographic sheet materials of various different forms.
  • the apparatus according to the invention is advantageously coupled to a laser recorder capable of exposing a wide range of sheet materials.
  • a latch mechanism may be provided to hold each processing module in place in the housing.
  • the latch mechanism includes a spring loaded handle which is pivoted onto the base of the housing. Rotation of the handle releases the latch. The end of the processing module rests on a spring carried on the housing base. This spring acts in the upwards direction to help lift the module out of the housing when the latch is released. When a new module is inserted, the handle is pushed out of the way and then snaps back into the latching position.
  • the housing may additionally comprise the necessary pipe-work, pumps, filters, heating and cooling units and the like to supply treatment liquid as desired to the processing cells of the apparatus.
  • a typical processing cell width would be 400 mm, with a sheet material path from inlet to outlet of 1000 mm, of which 50 mm is accounted for by each processing module.
  • the drawings show an apparatus for the liquid processing of sheet material.
  • the apparatus comprises a two-part housing 10 having a base portion 11 and removable lid 12.
  • the housing includes an inlet opening 14 and an outlet opening 16 defining a substantially horizontal and substantially straight sheet material path 18 through the apparatus.
  • a DC drive motor 20 is provided, preferably at the same end of the housing as the inlet opening 14, to drive sheet material 22 along the sheet material path 18 in a processing direction indicated by the arrow A.
  • means are provided to establish a static liquid level S in the apparatus when the drive motor 20 is not operating.
  • the top edge 23 of the base portion 11 is above the static liquid level S .
  • the housing 10 includes first and second worm drives 24, 26 mounted in bearings 21, 21a, such as double ball bearings, and coupled to the drive motor 20 via a gear box in such a manner that the worm drives can be caused to rotate in different directions.
  • the worm drives 24, 26 and the associated drive motor 20 are mounted in the base portion 11.
  • the gear box associated with the drive motor 20 can be adjusted to cause the worm drives 24, 26 to rotate in the same direction, if occasionally so required.
  • the housing 10 is divided by internal partial walls 27 into a number of compartments into which a number of removable processing modules 28, 30, 32, 33, 34, 36 are fitted.
  • Guide plates 38 are positioned between the internal partial walls 27 to guide the sheet material from one processing module to the next.
  • the modules 28, 30, 32, 33, 34, 36 each include a sub-frame 25 which supports a pair of rotatable members of varying description which form a nip 40 therebetween which defines part of the sheet material path 18 extending from the inlet opening 14 to the outlet opening 16 through the apparatus.
  • the processing module 28 comprises upper and lower drive rollers 42, 44 and associated upper and lower sealing rollers 43, 45, which seal the drive rollers to the sub-frame 25.
  • the drive rollers 42, 44 each comprise a rigid core 46 carrying a covering 48 of elastomeric material, the core 46 being secured to upper and lower drive roller shafts 50, 52.
  • the upper drive roller shaft 50 fixedly carries a worm gear 54, which meshes with the first worm drive 24, and an upper spur gear 55. It is preferred to use the nearer worm drive 24, rather than the further worm drive 26, for driving the sheet material through the apparatus to reduce any variation in drive speed which might result from the flexibility of the drive roller shaft 50.
  • the lower drive roller shaft 52 fixedly carries a lower spur gear 57, which meshes with the upper spur gear 55.
  • the worm gear 54 carried on and fixed to the upper drive roller shaft 50, is so positioned as to engage the first worm drive 24 thereby to drive the upper drive roller 42 in the indicated direction.
  • the upper spur gear 55 is coupled to the lower spur gear 57 carried on and fixed to the lower drive roller shaft 52, so that the lower drive roller 44 is driven in the indicated direction.
  • the sheet material 22 is driven along the sheet material path 18 in the processing direction.
  • the processing modules 32, 33 and 36 are similar.
  • the processing module 30 comprises a rotatable sheet wiping member in the form of a brush 58 and a rotatable backing member in the form of a rigid backing roller 60.
  • the brush 58 has fibres 62 mounted on a brush core 64 secured to a brush shaft 66.
  • a worm gear 68 is located on and fixed to the brush shaft 66, and is so positioned as to engage the second worm drive 26 to drive the brush 58 in a rotational direction opposed to the processing direction.
  • the rigid backing roller 60 is carried on a backing roller shaft 70, which carries and is fixed to a lower spur gear worm gear 72, meshing with a combined worm/spur gear 73 freely mounted on the brush shaft 66, and engaged by the worm drive 24.
  • the worm drive 24 thereby drives the backing roller 60 in the processing direction.
  • a sheet wiping member 74 comprises a sheet wiping cloth 76 of softer material, such as cotton, which wipes over the surface of the sheet material 22 as it passes.
  • the sheet wiping cloth 76 is mounted on a core 78 secured to a wiping member shaft 80.
  • a backing member is provided in the form of a rigid backing roller 82 carried on a backing roller shaft 84.
  • a worm gear 88 is fixed on the backing roller shaft 84 and is so positioned as to engage the worm drive 24 thereby to rotate the backing roller 82 in the processing direction.
  • a spur gear 86 is located on and fixed to the wiping member shaft 80, and meshes with a combined worm/spur gear 87 which is freely mounted on the backing member shaft 84, and is engaged by the worm drive 26.
  • the worm drive 24 thereby drives the wiping member 74 in a rotational direction opposed to the processing direction.
  • each of the processing modules 28, 30, 32, 33, 34 and 36 includes rotatable members each carried on a shaft on which worm gears are located.
  • the worm gears are so positioned to co-operate with one or other of the two worm drives 24, 26 to transfer drive from the drive motor 20 to the rotatable members according to the desired function of the respective processing module.
  • one end 96 of the sub-frame 25 which is adjacent the worm drives, carries a hook 90 located in a slot 91 in the base 11 of the housing 10 and resists the torque on the module when the motor 20 is running.
  • the other end 98 of the processing module rests on a spring-loaded support 100 carried on the housing base 11.
  • a latch mechanism 92 holds the processing modules in place in the housing 10.
  • the latch mechanism 92 includes a spring loaded catch 93 which is pivoted onto the base 11 of the housing and which engages a hook 95 carried on the other end 98 of the module. Rotation of an operating handle 94 releases the latch.
  • the spring-loaded support 100 is biased in the upwards direction to help lift the module 30 out of the housing when the latch mechanism is released. When a new module is inserted, the handle 94 is pushed out of the way and then snaps back into the latching position.
  • FIG. 1 to 7 comprises two adjacent processing cells, as defined by those processing modules 28, 32, 33 and 36 which include sealed drive rollers. This is merely illustrative. In practice more processing cells would be so defined.
  • processing modules may be provided, as indicated in the following Table.
  • the application to which such an apparatus may be put can be varied by replacing certain ones of the processing modules.
  • the table illustrates three such applications, A, B and C. These are for example:
  • the cells defined by the processing modules contain:
  • the cells defined by the processing modules contain:
  • the housing of such an apparatus is shown in Figure 8 in which the levers 94 are removed for the sake of clarity.
  • the apparatus comprises a two-part housing 110 having a base portion 111 and removable lid 112 hinged thereto.
  • the housing includes an inlet opening 114 and an outlet opening 116 defining a substantially horizontal sheet material path through the apparatus.
  • the top edge 123 of the base portion 111 is above the static liquid level in the apparatus.
  • the housing 110 is divided by internal partial walls 127 into a number of compartments into which a number of removable processing modules are fitted.
  • the internal partial walls 127 include cut outs 128 for accommodating worm drives not shown, and sub-housings 129 into which bearings for the worm drives are mounted.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Treatment Of Fiber Materials (AREA)
EP98200282A 1998-01-30 1998-01-30 Flüssigkeitsbehandlungsgerät für Blattmaterial Withdrawn EP0933678A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98200282A EP0933678A1 (de) 1998-01-30 1998-01-30 Flüssigkeitsbehandlungsgerät für Blattmaterial

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98200282A EP0933678A1 (de) 1998-01-30 1998-01-30 Flüssigkeitsbehandlungsgerät für Blattmaterial

Publications (1)

Publication Number Publication Date
EP0933678A1 true EP0933678A1 (de) 1999-08-04

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Family Applications (1)

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EP98200282A Withdrawn EP0933678A1 (de) 1998-01-30 1998-01-30 Flüssigkeitsbehandlungsgerät für Blattmaterial

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EP (1) EP0933678A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4888608A (en) * 1988-02-12 1989-12-19 Ing. Hermann Kummerl, Laborgeratebau, Inh. Ing. Klaus Kummerl Photographic developing machine
EP0581543A1 (de) * 1992-07-27 1994-02-02 Kodak Limited Photographisches Entwicklungsgerät mit zwei Filmbeförderungsgeschwindigkeiten
EP0622676A2 (de) * 1993-04-27 1994-11-02 Eastman Kodak Company Entwicklungsgerät

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4888608A (en) * 1988-02-12 1989-12-19 Ing. Hermann Kummerl, Laborgeratebau, Inh. Ing. Klaus Kummerl Photographic developing machine
EP0581543A1 (de) * 1992-07-27 1994-02-02 Kodak Limited Photographisches Entwicklungsgerät mit zwei Filmbeförderungsgeschwindigkeiten
EP0622676A2 (de) * 1993-04-27 1994-11-02 Eastman Kodak Company Entwicklungsgerät

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