EP0061062A1 - Dispositif pour limiter le transfert de liquide de traitement - Google Patents

Dispositif pour limiter le transfert de liquide de traitement Download PDF

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Publication number
EP0061062A1
EP0061062A1 EP82101841A EP82101841A EP0061062A1 EP 0061062 A1 EP0061062 A1 EP 0061062A1 EP 82101841 A EP82101841 A EP 82101841A EP 82101841 A EP82101841 A EP 82101841A EP 0061062 A1 EP0061062 A1 EP 0061062A1
Authority
EP
European Patent Office
Prior art keywords
rollers
tubular
porous
materials
treatment
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Withdrawn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
EP82101841A
Other languages
German (de)
English (en)
Inventor
Walter Dr. Kirsch
Jakob Kemmer
Walter Tabel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of EP0061062A1 publication Critical patent/EP0061062A1/fr
Withdrawn legal-status Critical Current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
    • G03D3/13—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
    • G03D15/00—Apparatus for treating processed material
    • G03D15/02—Drying; Glazing

Definitions

  • the invention relates to a device for reducing the carry-over of treatment liquids by sheet-like or ribbon-like materials during their chemical treatment in processing baths.
  • a wide variety of sheet-like or ribbon-like materials are subjected to a chemical treatment after their production, for example to refine their surface, such as by electroplating, anodizing or to develop photographically exposed films or papers in the photographic industry.
  • the materials are introduced into baths with chemicals and a large part of them are dragged out of the baths. the chemicals in subsequent baths or in water baths that wash off or dissolve the chemicals.
  • the chemicals used often contain toxic substances that endanger the environment and therefore may only be present in the wastewater in very small, legally prescribed amounts.
  • the wastewater must therefore be subjected to an ecological treatment before being discharged into the sewer in order to remove the toxic chemicals in the wastewater.
  • the carryover of chemicals creates losses in the bath from which the materials that have to be replaced have to be removed and contaminants in the subsequent baths that require regeneration.
  • the final washing bath contains between 10 and 150 mg of silver per liter of water.
  • the amount of toxic substances carried into the washing bath is proportional to the silver concentration.
  • the amounts of chemicals carried away by the materials depend on the one hand on the surface structure of the materials themselves, whereby rough surfaces carry off more chemicals than smooth surfaces, on the other hand there is a strong dependence on the nature and surface structure of the nubbed, grooved used in the different brands of processing machines or transport rollers covered with synthetic fiber fabric, which determine the degree of surface wetting in ml / m 2 .
  • the processing methods currently in use require the addition of up to 500 ml of bleach-fixing bath and up to 700 ml of developer to compensate for carry-over or for regeneration for every m 2 of photographic material that is being processed.
  • squeeze rollers to retain the processing liquids and to reduce the amount of surface wetting of the material is also known. With a longer material throughput, these squeeze rollers are no longer fully effective, since the processing liquid jams on the inlet side, is taken as a film from the squeeze rollers to the outlet side and is released again to the material. Suctioning off the processing liquid with vacuum nozzles on the inlet side of the material shows only a limitedly usable improvement in reducing the carryover of processing liquids.
  • the invention is therefore based on the object of providing a device of the type mentioned in the introduction, with which it is possible in a simple manner to reduce the carry-over amounts by sheet-like or tape-like dimensions to keep materials as low as possible during their treatment in chemical baths and to make the amounts of carry-over reproducible for similar materials.
  • the object is achieved according to the invention for a device of the type mentioned at the outset in that two tubular rollers made of a porous material are arranged behind and / or above the treatment bath transversely to the direction of travel of the sheet or strip-shaped materials, that the tubular rollers are connected to a vacuum generator on the end face and a separator for the treatment liquid are connected and that the sheet or strip materials can be guided so that their top and bottom sides each touch or loop around a tubular roller for suction of the treatment liquid.
  • a special embodiment of the device is characterized in that a tubular, porous pair of rollers under negative pressure for processing photographic materials in roller developing machines is arranged at least before a transition of the photographic material from one treatment bath to a next and / or behind the last treatment bath that each side of the photographic material comes into contact with a tubular roller or partially encloses a roller.
  • the porous material for the tubular rollers consists of a sintered plastic and has pores in a size of 50 ⁇ m to 300 ⁇ m.
  • a smoother roller surface is achieved with pore sizes from 100 ⁇ m to 200 ⁇ m, whereby these pore sizes are also large enough to completely suck the chemical solutions off the surface.
  • tubular rollers are provided on the inside with a support core made of a corrosion-resistant metal, preferably stainless steel.
  • porous tubular rolls in addition to sintered plastics, e.g. Polyethylene, other materials such as glass, pumice or the like are used.
  • sintered plastics e.g. Polyethylene
  • other materials such as glass, pumice or the like are used.
  • a corrosion-resistant sintered hard metal is used as the porous material for the tubular rolls, which has pores in a size of 50 to 300 microns.
  • Such sinter hard metals are manufactured industrially in all dimensions and shapes and consist of a sintered stainless steel powder.
  • the tubular rollers are additionally driven in the usual way, e.g. through spur gears or belts, if they are not wrapped in a small area by a web-shaped material and are thus driven by the web without slippage.
  • tubular rollers are part of a roller transport developing machine for photographic materials and are arranged as the last pair of rollers at the outlet of the photographic material from a processing tank above the surface of the treatment liquid.
  • B lattiform or strip-shaped materials are combined for treatment in processing liquid to form a band in succession by stapling or sticking together.
  • Frames are often used, in which the materials for treatment are clamped.
  • a white is distinguished for these materials
  • the device is advantageously suitable for suctioning off chemical solutions to avoid carry-over into other baths and for recovering the chemical solutions, which can usually be pumped back into the processing tanks without treatment.
  • processing photographic materials it is surprisingly shown that not only the chemical solutions adhering to the surface are suctioned off, but also the chemical solution which has penetrated into the photographic layers, which consist of gelatin emulsions, is reduced.
  • the use of the device after the last washing bath in photographic materials allows predrying, which saves a considerable amount of heat energy for drying. If the device is used to treat air-permeable sheet-like or tape-like materials, e.g.
  • a processing device for treating a sheet or tape-shaped material 1 in two processing containers I, II with two treatment liquids 2, 3 is shown.
  • the treatment liquids 2, 3 can be liquids which act chemically on the material 1 or water baths without chemicals, which are arranged one after the other in the desired order.
  • the sheet-like or ribbon-shaped material 1, made of metal, plastic, paper, textile or other fabrics, is fed to the processing container I, undergoes a first treatment, is passed into the second processing container II and so on until the treatments have been completed.
  • two tubular porous rollers 4 are arranged one above the other and resiliently between the containers I and II, between which the sheet-like or strip-like material 1 is carried out .
  • the rollers 4 are rotatably supported and are driven, for example, by a spur gear 5.
  • the spur gear 5 is driven in common with the other transport rollers, which are arranged on a plate 6, jointly and synchronously by a motor, not shown, in such a way that the peripheral speed corresponds to the material speed.
  • the tubular rollers 4 consist of a porous material, for example sintered plastic such as polyethylene or a corrosion-resistant cemented carbide and are superimposed so that both sides of the sheet-like material 1 are always in contact with the rollers 4 by gravity or spring force.
  • the rollers 4 are connected (not shown) at least on one of their end faces to a vacuum generator, for example to a vacuum pump or suction jet pump, so that a vacuum is created in the interior of the tubular rollers 4, as a result of which the treatment liquid 2 located on the strip-shaped material enters the interior of the Rolls 4 is suctioned off.
  • a separator of conventional design is arranged between the rollers 4 and the vacuum generator or behind the vacuum generator, in which the extracted treatment liquid 2 is collected and pumped back into the processing container I, for example with a pump.
  • the performance of the vacuum generator is determined by the working width of the processing machine.
  • a partial vacuum is used, the abs means of compressed air of 2 bar injector as a negative pressure of 0, 8 bar. up to 0.9 bar abs. delivers.
  • the vacuum can also be about 0.5 to 0.6 bar abs. be.
  • the pore size of the tubular rollers 4 can be selected within certain limits, since e.g. tubular rollers 4 made of polyethylene are sintered in a mold, pore sizes from 50 ⁇ m to 300 ⁇ m being able to be produced from the granulate. Sufficient and advantageous because of the lower air consumption are pore sizes from 100 ⁇ m to 200 ⁇ m, especially since this pore size achieves a smooth surface that is suitable for sensitive materials 1, e.g. for photographic sheet or tape-shaped films or papers are advantageous because of the gentle surface contact.
  • the porous tubular rollers 4 shown in FIG. 1 can exert pressure on the top and bottom of the material 1 by means of a resilient support, so that they additionally act like squeeze rollers and immediately suck up and remove a liquid bead formed at the inlet of the material 1.
  • the effect of the rollers 4 is that of the nip rollers.
  • Guide devices such as guide plates 7 or separating combs 8 are usually provided on the transport rollers for the automatic introduction of the sheet-like or band-shaped material.
  • Fig. 2 shows an arrangement with two tubular porous rollers 4 in which the sheet or band-shaped material 1 is guided around the porous rollers 4 with a longer loop through guide plates 7 and separating combs 8.
  • This arrangement acts on the one hand like that described in FIG. 1, but has the advantage due to the long looping of the rollers 4 that the band-shaped material is further dried by the vacuum.
  • the amount of chemical solutions carried away is considerably reduced in this arrangement.
  • FIG. 3 shows an advantageous arrangement of the porous tubular rollers 4 in a treatment device.
  • the ones usually provided in a developing machine were provided in a simple manner Transport rollers on the plates 6 at the outlet of the first and second processing containers I, II are replaced by porous tubular rollers 4 and these are connected to a vacuum generating device with a separator.
  • Corresponding baffles or separating combs can also be used to wrap the rollers 4 according to FIG. 2.
  • rollers 4 of sintered metal can be used.
  • porous rollers 4 are advantageous, which are made of a soft, also porous material, e.g. are covered with a sponge or foam-like material into which the thickenings can penetrate.
  • the porous tubular rollers 4 are pivotally mounted on levers 9 about axes 11 (double arrows).
  • This embodiment is suitable for sheet-like or sheet-like materials 1 that are clamped in frames 10 or with a clamping device 10 are connected.
  • the rollers 4 are spread and roll away over the thickening, so that only a small amount of processing liquid is carried over.
  • the rollers 4 are pivoted back to their starting position by springs (not shown) after passing through the thickening.
  • the photographic papers discharged from the last washing bath were treated untreated, after treatment with previously known methods and after treatment in a device according to the invention for the amount of water which they carried away from the washing bath.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
EP82101841A 1981-03-21 1982-03-09 Dispositif pour limiter le transfert de liquide de traitement Withdrawn EP0061062A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813111157 DE3111157A1 (de) 1981-03-21 1981-03-21 Vorrichtung zur verminderung der verschleppung von behandlungsfluessigkeiten
DE3111157 1981-03-21

Publications (1)

Publication Number Publication Date
EP0061062A1 true EP0061062A1 (fr) 1982-09-29

Family

ID=6127940

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101841A Withdrawn EP0061062A1 (fr) 1981-03-21 1982-03-09 Dispositif pour limiter le transfert de liquide de traitement

Country Status (3)

Country Link
EP (1) EP0061062A1 (fr)
JP (1) JPS57163237A (fr)
DE (1) DE3111157A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208445B (en) * 1987-07-23 1991-05-15 Fuji Photo Film Co Ltd Photographic processing apparatus
EP0461528A2 (fr) * 1990-06-11 1991-12-18 Eastman Kodak Company Dispositif de traitement de film équipé d'un rouleau absorbant pour éliminer les taches d'eau
EP0639802A2 (fr) * 1993-08-18 1995-02-22 Xerox Corporation Appareil de reproduction électrostatographique avec rouleau poreux
EP0647882A1 (fr) * 1993-10-11 1995-04-12 Agfa-Gevaert N.V. Appareil photographique de traitement avec des rouleaux de nettoyage

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6141252U (ja) * 1984-08-18 1986-03-15 コニカ株式会社 印刷製版用感光材料処理装置
JPH067256B2 (ja) * 1986-07-10 1994-01-26 富士写真フイルム株式会社 ハロゲン化銀写真感光材料の自動現像装置
JPH0267336U (fr) * 1989-09-28 1990-05-22
JP2573271Y2 (ja) * 1992-07-23 1998-05-28 大日本スクリーン製造株式会社 感光材料処理装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB908812A (en) * 1959-10-13 1962-10-24 Halden & Co Ltd J Improvements in or relating to diazotype developing machines
FR1370612A (fr) * 1963-04-17 1964-08-28 Format Reduit Tirage 16 Soc D Perfectionnements aux tireuses optiques de copies de films cinématographiques
US3453681A (en) * 1967-08-14 1969-07-08 Ibm Cleaning apparatus
GB1579766A (en) * 1977-05-30 1980-11-26 Dainippon Screen Mfg Film processing apparatus incorporating squeegee means

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB908812A (en) * 1959-10-13 1962-10-24 Halden & Co Ltd J Improvements in or relating to diazotype developing machines
FR1370612A (fr) * 1963-04-17 1964-08-28 Format Reduit Tirage 16 Soc D Perfectionnements aux tireuses optiques de copies de films cinématographiques
US3453681A (en) * 1967-08-14 1969-07-08 Ibm Cleaning apparatus
GB1579766A (en) * 1977-05-30 1980-11-26 Dainippon Screen Mfg Film processing apparatus incorporating squeegee means

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208445B (en) * 1987-07-23 1991-05-15 Fuji Photo Film Co Ltd Photographic processing apparatus
EP0461528A2 (fr) * 1990-06-11 1991-12-18 Eastman Kodak Company Dispositif de traitement de film équipé d'un rouleau absorbant pour éliminer les taches d'eau
EP0461528A3 (en) * 1990-06-11 1992-08-26 Eastman Kodak Company Film processor with absorbent roller to eliminate water spotting
EP0639802A2 (fr) * 1993-08-18 1995-02-22 Xerox Corporation Appareil de reproduction électrostatographique avec rouleau poreux
EP0639802A3 (fr) * 1993-08-18 1995-04-05 Xerox Corp Appareil de reproduction électrostatographique avec rouleau poreux.
US5481341A (en) * 1993-08-18 1996-01-02 Xerox Corporation Roller for controlling application of carrier liquid
EP0647882A1 (fr) * 1993-10-11 1995-04-12 Agfa-Gevaert N.V. Appareil photographique de traitement avec des rouleaux de nettoyage

Also Published As

Publication number Publication date
DE3111157A1 (de) 1982-09-30
JPS57163237A (en) 1982-10-07

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19820309

AK Designated contracting states

Designated state(s): BE DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19831114

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KEMMER, JAKOB

Inventor name: KIRSCH, WALTER, DR.

Inventor name: TABEL, WALTER