US3844786A - Processing photographic materials - Google Patents

Processing photographic materials Download PDF

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Publication number
US3844786A
US3844786A US00336591A US33659173A US3844786A US 3844786 A US3844786 A US 3844786A US 00336591 A US00336591 A US 00336591A US 33659173 A US33659173 A US 33659173A US 3844786 A US3844786 A US 3844786A
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US
United States
Prior art keywords
conduit
photographic material
processing solution
processing
slits
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
US00336591A
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English (en)
Inventor
Y Ito
M Sonoda
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Application granted granted Critical
Publication of US3844786A publication Critical patent/US3844786A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03D13/00—Processing apparatus or accessories therefor, not covered by groups G11B3/00 - G11B11/00
    • G03D13/003—Film feed or extraction in development apparatus
    • 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
    • G03D3/02—Details of liquid circulation
    • G03D3/06—Liquid supply; Liquid circulation outside tanks

Definitions

  • the present invention relates to processing photo graphic materials and, in more detail, to the rapid processing of photographic materials.
  • Photographic materials such as silver halide photographic films are treated with processing solutions such as a developer and a fixer etc., after exposure.
  • processing solutions such as a developer and a fixer etc.
  • photographic processes have, in general, been carried out by a roll conveying process.
  • many pairs of rolls are disposed in a horizontal or perpendicular direction and a part or all of one roll of each pair is immersed in a treating solution and the photographic material is passed between the contacted rolls.
  • the time for obtaining the desired effect of the treatment(s) on the photographic materials is essentially fixed, and the processing time depends upon the time of contacting the photographic material with the processing solution and the state of stirring of the solution during contacting. If it is intended to carry out development in a short time by prior art roll conveying processes the photographic material must be carried between many rolls at a high speed, and consequently the photographic material is easily spoiled. On the other hand, if the photographic material is passed through a small bath by means of a small number of rolls, the ratio of unnecessary or unused solution to the volume in the small bath becomes more than that in a large bath and the area of contact of the processing solution with air increases while the area of contact of the photographic material with the processing solution decreases. Further, since the effect of stirring the solution by rolls is poor, uneveness of treatment easily results.
  • One object of the present invention is to provide a process for treating photographic materials in a very short period of time.
  • the present inventors completed this invention as the result of many studies based on the fact that the processing time forphotographic materials depends upon the time of contact with the processing solution and the conditions of the contact, the object of the present invention being attained by passing a photographic material through slits in a conduit while running the processing solution through the conduit, the slits being disposed on the wall thereof so that the photographic material passes across the line of flow of the treating solutron.
  • the diameter of the conduit, the flow rate of the solution and the length of the slits etc. would control the flow of the solution from the slits, to prevent the flow of the solution running in the conduit from the slits (shown in FIG. 1) it is sufficient to merely fix the width of the slits (interval) so as to be preferably less than 5mm, particularly less than 3mm.
  • the minimum slit width is decided by the thickness of photographic material to be processed.
  • the thickness of photographic materials is generally at most about 300 microns before processing and is generally at most about 500 microns even if the photographic material is swollen by processing. Accordingly, for most materials the minimum value slit width will generally be about 0.5mm, preferably about lmm.
  • the object of the process of the present invention is to carry out the treatment of photo-' graphic materials in a very short period of time, it is not always necessary to use slits which satisfy the abovementioned condition. For example, in the case where the flow rate of the solution flowing out around the paper is small, even if the width of the slits is beyond the above mentioned limits it is possible to carry out the treatment in a very short time, though a very slight loss of the solution will be encountered.
  • the material composing the conduit having a pair of slits is not limited.
  • metals, plastics, rubbers, wood, bamboo and the like can be used.
  • the conduit should not have a harmful influence upon the photographic materials treated or the processing solutions.
  • FIG. 1 is an explanatory diagram of one embodiment of treating apparatus for carrying out the process of the present invention.
  • FIG. 2 is a detailed perspective view of the treating portion of the processing apparatus for carrying out the process of the present invention shown in FIG. 1.
  • FIG. 3 is an explanatory diagram of an embodiment of a treating part for carrying out the process of the present invention showing the relationship between the processing apparatus and the stand (angle of incline).
  • the diameter of the conduit (d) to the photographic material, usually paper, speed (v) is usually not more than about 5 seconds, that is, v d/S
  • the length of the slits is decided by the width of the photographic material processed. It is usually not more than 40cm for commonly encountered photographic materials.
  • a treating portion 4 having guides l and slits 2, 2 on a part of the surface of the conduits is disposed so that the slits 2, 2 are horizontal.
  • a processing solution is circulated through the conduit, though instead of circulating the processing solution it may be disposed of after one pass through the conduit.
  • Two pairs of rolls 3, 3' which contact each other are disposed at both sides of the treating portion 4.
  • a photographic material 5 is passed continuously through the rolls 3 the slit 2, the processing solution, the slit 2' and the rolls 3. in sequence.
  • the rate of flow of the processing solution and the conveying speed of the photographic material can be freely varied if the essential condition heretofore recited is met.
  • Guides 1 and rolls 3, 3 are not always necessary and may be substituted for by other conveying devices because they are merely used for conveying the photographic material in a stable manner. If a plurality of rolls 3, 3' and treating portions 4 are employed, all steps in the treatment of a photographic material can be carried out continuously.
  • Guides 1 and the slits 2, 2' are provided on a part of the wall of the conduit in the running direction.
  • the length of the slits can be varied, it should be nearly equal to the width of the photographic material to be treated to avoid any undue loss of treating solution.
  • Such an embodiment is exemplified in H6. 3, where 3, 4 represents a roll/treating portion combination, S is a stand, P is a pump, RC is a recycle conduit and PC is a processing solution hold-tank. In this embodiment processing solution is constantly recycled.
  • the process of the present invention can be applied to any photographic materials which are subjected to wet treatment such as silver halide photographic materials, diazotype photographic materials and photographic materials using photopolymers.
  • treatment or processing includes every wet processing such as development, stopping, fixing, bleaching, rinsing and combinations thereof and etching treatments involving photographic materials.
  • the composition of the processing solution can be selected as desired in a manner known to those skilled in this field.
  • the process of the present invention has the following advantages in addition to the above mentioned effects.
  • a constant temperature processing solution can be maintained in a manner which substantially excludes air, and thus it is possible to prevent air oxidation of the processing solution, and consequently the processing solution does not rapidly deteriorate.
  • the pipes were fixed to incline about 5 to the horizontal direction so that the processing solution naturally flowed through the pipe. Both ends of the pipe communicated with a developer tank via polyvinyl chloride tubes. In this case, a polyvinyl chloride pipe linked to the end of the upper side of the pipe communicated with the developer tank through a pump (P).
  • the basic assembly was as shown in FIG. 3.
  • Each slit was equipped with guide plates. A pair of rolls was provided near the guide plates, by which the photographic material was passed smoothly through the sequence slit-pipe-slit.
  • the basic assembly is shown in H65. 1 and 2.
  • the developer tank was filled with an aqueous compound developer (Commercial name: Rendol, produced by Fuji Photo Film Co., Ltd.)
  • the flow of the developer wasas follows: an exposed photographic film having a 32mm or 16mm width was passed through the assembly and the conditions where developer. did not flow out from the slits of the pipe were determined. These are shown in the following table.
  • slit width is the controlling factor and that processing solution flow rate and photographic material speed through the conduit can be varied greatly, keeping in mind sufficient chemicals must contact the photographic material to achieve the desired processing result.
  • a process for continuously treating photographic material in web form which comprises:
  • conduit which conduit is provided with a pair of substantially oppositely disposed slits in the walls thereof, without significant loss of processing solution;
  • processing being such that the flowing processing solution is maintained under conditions which substantially exclude air, whereby air oxidation of the processing solution is prevented.
  • said photographic material is selected from the group consisting of a silver halide photographic material, a diazo-type photographic material and a photographic material comprising a photopolymer.
  • processing solution is selected from the group consisting of a development, a stopping, a fixing, a bleaching, a rinsing or an etching solution.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US00336591A 1972-03-03 1973-02-28 Processing photographic materials Expired - Lifetime US3844786A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47021551A JPS4890527A (el) 1972-03-03 1972-03-03

Publications (1)

Publication Number Publication Date
US3844786A true US3844786A (en) 1974-10-29

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Application Number Title Priority Date Filing Date
US00336591A Expired - Lifetime US3844786A (en) 1972-03-03 1973-02-28 Processing photographic materials

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US (1) US3844786A (el)
JP (1) JPS4890527A (el)
DE (1) DE2310467A1 (el)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2590834B2 (ja) * 1986-09-29 1997-03-12 株式会社ニコン カメラの自動日中シンクロシステム

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344729A (en) * 1964-06-22 1967-10-03 Itek Corp Photographic sheet material processing apparatus
US3392706A (en) * 1966-09-06 1968-07-16 Varian Associates Liquid inker for electrographic image development employing the suction of an air pump for applying the ink
US3392707A (en) * 1965-10-06 1968-07-16 Azoplate Corp Apparatus for developing latent electrostatic images
US3575101A (en) * 1967-09-01 1971-04-13 Eastman Kodak Co Method and apparatus for processing photographic material
US3641911A (en) * 1968-12-06 1972-02-15 Agfa Gevaert Nv Photographic processing apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344729A (en) * 1964-06-22 1967-10-03 Itek Corp Photographic sheet material processing apparatus
US3392707A (en) * 1965-10-06 1968-07-16 Azoplate Corp Apparatus for developing latent electrostatic images
US3392706A (en) * 1966-09-06 1968-07-16 Varian Associates Liquid inker for electrographic image development employing the suction of an air pump for applying the ink
US3575101A (en) * 1967-09-01 1971-04-13 Eastman Kodak Co Method and apparatus for processing photographic material
US3641911A (en) * 1968-12-06 1972-02-15 Agfa Gevaert Nv Photographic processing apparatus

Also Published As

Publication number Publication date
JPS4890527A (el) 1973-11-26
DE2310467A1 (de) 1973-09-06

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