US3509809A - Developing device for processing copying materials - Google Patents

Developing device for processing copying materials Download PDF

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Publication number
US3509809A
US3509809A US638028A US3509809DA US3509809A US 3509809 A US3509809 A US 3509809A US 638028 A US638028 A US 638028A US 3509809D A US3509809D A US 3509809DA US 3509809 A US3509809 A US 3509809A
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United States
Prior art keywords
rollers
roller
liquid
squeeze
receiving material
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Expired - Lifetime
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US638028A
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English (en)
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Walter Limberger
Rudolf Wendt
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Individual
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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
    • G03D9/00—Diffusion development apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1722—Means applying fluent adhesive or adhesive activator material between layers
    • Y10T156/1727—Plural indefinite length or running length workpieces
    • Y10T156/1729—Fluid applied to nip between indefinite length webs

Definitions

  • Fig 5 Fig. 6 46 46 57 a K v United States Patent M US. Cl. 95-94 14 Claims ABSTRACT OF THE DISCLOSURE
  • An apparatus for developing copying materials using the silver salt diffusion method wherein the exposed negative is treated with a developer and the positive or receiving material is treated with another liquid.
  • the negative and positive materials are guided through separate treating tanks and thereafter brought into engagement with each other by a pair of squeeze and transport rollers at the exit ends of the tanks.
  • the treating tank for the positive or receiving material has a surface wetting device for applying the liquid to the material, and a pair of squeeze rollers for removing any excess treating liquid from the positive material before it is brought into engagement with the negative material by the squeeze and transport rollers.
  • the invention relates, as indicated, to a developing apparatus for processing copying materials, using the silver salt diifusion method, wherein the exposed negative material is wetted with a developing fluid and the positive or receiving material is subjected to a surface treatment by means of another liquid, and wherein there are provided a common pair or squeeze and transport rollers for both materials and a surface wetting device for the said receiving material.
  • the present invention has the object of improving the proposed devices and of providing apparatus not only for applying the liquid but also for working it into the surface of the receiving material, whilst simultaneously providing a sufficient squeezing out of the excess liquid.
  • a negative material which has a halide silver emulsion layer, on which a picture has been exposed, which is transferred after development, by diffusion, to the receiving material.
  • German Pat. No. 764,572 describes the so-called silver salt diffusion method, wherein widely different substances are used as receptors, such as unlayered'paper, textiles, Wood, Celluloid, other synthetic resins, and the like.
  • receptors such as unlayered'paper, textiles, Wood, Celluloid, other synthetic resins, and the like.
  • material used in this description comprises foliate material.
  • 3,509,809 Patented May 5, 1970 transfer may be supported by the presence of substances furthering the diffusion.
  • the diffusing or diffused silver halide may be developed in a picture without exposure, wherein this development is supported by the addition of nuclei or reacting substances.
  • the developed picture is applied, for example, to a baryte paper or a textile base, wetted in the same bath as the silver halide material.
  • a separate positive or receiving layer which contains the reduction nuclei.
  • this layer is arranged on a special carrier so that layer and carrier form the receptor material.
  • the liquid for the receiving material will be a so-called germinating bath, imparting to the receiving material the property of responding even in the unlayered condition to the effects of the developed negative material, with regard to the distribution of the picture.
  • the present invention has the object of providing a special effect with regard to the provision of the wetting liquid for the receiving material, more particularly in conjunction with a surface wetting of the receiving material.
  • this object is realized in that an additional squeezing out device is arranged between the surface wetting device and the common pair of squeeze and transport rollers in the guide for the receiving material.
  • the invention is based on the knowledge that the pressing in, and possibly even only the penetration, is of particular importance, before excess liquid is expelled.
  • the object is here to saturate with the liquid provided for this material at least a layer or a surface zone of the receiving material to a certain depth.
  • the working stages of applying the wetting liquid to the receiving material and of the squeezing out, before the receiving material is combined with the negative material are solved in a particularly advantageous manner.
  • the invention creates a time constant as a function of the travelling speed, giving the applied wetting liquid an opportunity to settle in the surface of the receiving material or to be distributed therein, before it reaches the squeezer.
  • the squeezing device may comprise belts running one on the other and along surfaces, rollers running along surfaces, or the like.
  • the squeezing device consists of a pair of driven squeeze rollers.
  • the surface wetting device is a conventional surface wetting roller, the peripheral speed of which is synchronized with that of the additional pair of squeeze rollers.
  • the one-sided application of the wetting liquid produces a favourable treatment of the receivin g material.
  • the surface wetting roller is associated with a contact pressure device, such as, for example, at least on pressure roller, effecting a preliminary compression with a view to working in the applied liquid
  • a contact pressure device such as, for example, at least on pressure roller
  • the periphery of the pressure device and/or surface wetting roller is provided with profiles for introducing the liquid into the range of the contact zone, whilst the additional pair of squeeze rollers has a substantially smooth surface.
  • This arrangement has the advantage that the liquid is practically rolled in, because the profiles, which may be dish-shaped, for example, prevent the liquid escaping from the contact zone, and because these dish-shaped profiles retain even in the zone of maximum pressure a certain amount of liquid which can enter into the material.
  • the smooth construction of the squeeze rollers through which the material passes after a certain lapse of time ensures the removal of any liquid actually present on the surface of the receiving material.
  • the contact pressure roller and the roller of the additional pair of squeeze rollers are adapted to be moved towards the associated counter-roller, such as known in the art, and springs are provided for generating the contact pressure.
  • a plurality of contact rollers are arranged around a section of the periphery of the surface wetting roller.
  • the contact pressure device consists of an endless belt passing over a section of the surface of the surface wetting roller.
  • a guide element extends transversely across the path of the receiving material upstream of the surface wetting roller, in order to guide this material to the surface of the roller.
  • the additional pair of squeeze rollers is arranged within the vertical projection of a special trough for the treatment liquid for the receiving material. This has the object of preventing mixing of the liquids serving for treating the receiving material and the negative material.
  • FIG. 1 is a side elevation of a device, with the front side of the main container removed, showing in partial cross-section the inner elements of the device;
  • FIG. 2 is a view corresponding to that of FIG. 1, of an additional contact pressure roller
  • FIG. 3 is a cross-section along the line IIIIII in FIG. 2;
  • FIG. 4 is a cross-section along the line IVIV in FIG. 2;
  • FIG. 5 shows a partial side elevation of a modification, in which equivalent parts are designated by the same reference numerals with an apostrophe and
  • FIG. 6 is a partial side elevation of a further modification of FIG. 2.
  • the device shown has an outer trough 1 with a bottom 2, two parallel side walls, of which the rearward wall is shown at 3, and end walls 4 and 5.
  • This vessel contains a liquid, the level of which is shown at 6.
  • a guide 7 formed by a plate, and more particularly an arcuate, profiled, corrugated or perforated plate, or by webs which may extend parallel or obliquely to the direction of advance of the material.
  • This guide 7 extends into the lowest part of the vessel 1.
  • This element is associated with another guide element 8, facing upwardly, and which may have the same construction as the first element. It terminates near the point of contact between the rollers 30 and 31 of a so-called common pair of squeeze and transport rollers.
  • an inner trough 11 Suspended in the outer trough 1 is an inner trough 11, having a downwardly closed bottom.
  • the trough 11 may be supported in the vessel 1, for example, by a support 12, and by means of lugs 51, 52, shown in FIG. 3, resting on the side walls 53, 54 of the trough 1. It may be seen that the trough has on the inlet side above the guide 7 a guide-like extension 13, the section of which, extending beyond the side wall 3, may have support lugs.
  • the trough 11 contains a second liquid, a so-called germinating bath, the level of which is shown at 14.
  • a surface wetting roller 15 is rotatably mounted within the trough 11.
  • the mounting will be described in detail further below.
  • the top section 16 of the surface wetting roller is located substantially at the level of the top 17 of the guide-like extension, extending between the side walls 18 of the trough 11 and terminating in front of the roller 15.
  • the top may be formed, for example, by webs of foil-like, vertically positioned strips, one of which has an end 19, and arranged side by side. Guiding along webs has the advantage that the surface of the material sliding thereover is protected.
  • the upper side 17 terminates substantially at the same level as the top of the wetting roller 15.
  • the rear end wall 5 carries a supporting mechanism, having brackets extending parallel to the side walls of the trough 1 and, by means of a step, also parallel to the side walls of the trough 11, and always extending inwardly along the side walls; one of these brackets is shown at 20.
  • the step extending substantially along the dotted line 21, has the object of bridging the inwardly directed projection between the inside of the side walls of the trough 1 and the inside of the side walls of the trough 11. If the bottom surface 22 of the trough 11 is mounted in a liquid-tight way directly on the side walls of the trough 1, this step is unnecessary.
  • the brackets 20 have at one end a connecting wall portion 23, extending parallel to the rearward end wall 5 and resting on webs 24 of this end wall 5.
  • a clamp 25 overlying the end Wall, and engaging on the outside of the end wall under a rim 26.
  • the brackets form arms 55, 56 (FIG. 3), having a first leg 27, followed by a downwardly directed step 28, and a second leg 29, extending substantially parallel to the leg 27.
  • the rollers 30, 31 of a common pair of squeeze and transport rollers are mounted in the leg 27 These r011- ers are resiliently urged one against the other; means to this end are known in the art and do not form part of the invention.
  • FIG. 4 shows the mounting means 57, 58 for the forward roller 30.
  • rollers 34, 35 are adapted to be displaced relative to the mounting means for the roller 31, and a spring may be arranged between the individual mounting means, such as shown, by way of example, in FIG. 4 for the rollers 34, 35.
  • the rollers are driven in the sense indicated by the arrows 32, 33.
  • a pair of squeeze rollers 34 are located. With regard to the connecting line between the axes of the rollers, these rollers are substantially perpendicular to the common squeeze and transport roller pair 30, 31. Also these rollers 34, 35 are urged towards each other and have preferably a smooth surface.
  • the mounting means for the rollers 34, 35 are shown at 59, 60, 61 and 62. These have vertical side faces and are guided in slots 63, 64 of the arms 55, 56.
  • the shafts ends 65, 66, 67 and 68 carry abutments 69, 70, 71, 72 for springs 73, 74, which pull the top roller 34 towards the bottom roller 35.
  • the wetting roller 15 has on one end face a step-shaped projection 38, or a correspondingly mounted disk, which collaborates with a projection 39 or a disk on the squeeze roller 35.
  • the projections or disks are interconnected by a cable or belt 40.
  • the pair of squeeze rollers 34, 35 is driven as indicated by the arrows 41, 42 so that also the wetting roller revolves in the direction of the arrows 43.
  • the top of the wetting roller 15 is above the liquid level 14 so that material applied via the top 17 of the guide elements runs over the section 16 and is thereby wetted.
  • the leg 29 of the bracket has at its outer end a slot 44, into which is fitted an angled guide member 45, for example, of synthetic resin, which extends transversely over the guide path of the receiving material.
  • the guide element has the object of urging the receiving material from the top on to the upper section of the wetting roller 15, or of guiding it thereto, in order to ensure complete wetting.
  • the guide member is exchangeable in order to enable the use of different designs and different downwardly directed profiles, and thus to change the intensity of the wetting by the roller 15.
  • the surface wetting roller 15 co-operates with a contact pressure roller 46, guided vertically movably in the side walls 3 of the trough 1, as shown in FIG. 3, and affected by the pressure of springs 75, 76, which urge it towards the wetting roller 15.
  • the bearing means are shown at 77, 78.
  • the springs, pressing the pairs of rollers together, such as on the bearings 30, 34, 46, are known in the art. of importance is the coordination of the direction of the pairs of rollers as hereinbefore described.
  • the device shown has the advantage that the driving members may be easily dismantled, enabling the whole device to be easily disassembled.
  • a motor 47 is arranged on the squeeze roller 34, such as via a coupling 79.
  • a corresponding motor 48 may be arranged on the shaft of the common squeeze and transport roller 30, and in special embodiments, the different speeds of these motors 47 and 48 may cause the peripheral speed of the rollers 30 and 31 to be greater than that of of the rollers 34, 35.
  • the drive motor 47 for the squeeze roller 34 is mounted on a bracket 80 on a frame 81.
  • the driven element may be connected by a cable or belt drive with the other pair of rollers, similar to the system 40. If the common squeeze and transport roller pair is to run faster, a transmission may be interposed.
  • the receiving material which is preferably in sheet form, is applied as shown by the arrow 49 and travels along this arrow over the top 17, the upper section of the wetting roller 15 and through the pair of squeeze rollers 34, 35 to the common pair of squeeze and transport rollers 30 and 31.
  • the negative material is applied along the twin-headed arrow 50 and passes over the guide elements 7 and 8 to the common squeeze and transport rollers 30, 31.
  • the trough 11 and the parts cooperating therewith such as the surface wetting roller 15, its stub axles 37, the legs of the bracket 20 and the parts arranged thereon, for example, the squeeze rollers 34, 35, at least insofar as they are located within the zone of the trough 11, as well as the contact pressure roller 46 and the guide element should be free from metallic surfaces. In this way it can be prevented that the germinating bath in the trough 11 is destroyed with time by some catalysis.
  • all elements so arranged - are made of synthetic resins. Where such elements, such as, for example, rollers, axles or shafts, are made of metal, they are provided with a plastic coating acting as screen. More particularly, also the driving means are made of plastics.
  • FIG. 3 the side walls 81, 82 are shown with projections 83, 84, which rest on the lugs 51, 52.
  • the surfaces wetting roller 15 has, on its upper side in addition to the contact pressure roller 46, two further contact pressure rollers 46' and 46", slightly offset peripherally; these rollers are mounted near each other along the upper section of the surface wetting roller 15 in the same way, as shown in FIG. 3 for the roller 46.
  • a surface wetting roller 15' is mounted in the same way as the surface wetting roller 15 in FIG. 1.
  • a device for developing copying materials using the silver salt dififusion method and a negative and a receiving material, to which latter the picture exposed on the negative material is transferred comprising a first vessel with a developing liquid for the negative material, first guide elements on said first vessel for guiding the negative material through said developing liquid, a second vessel with a second liquid for treating the receiving material, second guide elements for guiding the receiving material to and through said second vessel, a pair of squeeze and transport rollers in front of which said first and second guide elements terminate in order to pass the negative material and the receiving material, after separate wetting by their respective liquids, in superimposed relationship through said pair of squeeze and transport rollers, and additional squeeze means engaging the receiving material within the zone of said second guide elements and between the second treatment liquid and said pair of squeeze and transport rollers.
  • said additional squeeze means comprises a first and a second roller both of which are mounted rotatably relative to both vessels, and means positively driving at least one of said first and second rollers, bearing means for said first and second rollers, said bearing means for both first and second rollers being so spaced that said first and second rollers run on each other under contact pressure.
  • a device as set forth in claim 3 wherein said device for applying the second liquid comprises a surface wetting roller, drive means interconnecting said surface wetting roller and one of said first and second squeeze rollers to synchronize the peripheral speed of said surface wetting roller with that of said first and second squeeze rollers.
  • a device for developing copying materials using the silver salt diffusion method and a negative and a receiving material, to which latter the picture exposed on the negative material is transferred comprising a first vessel with a developing liquid for the nega tive material, first guide elements on said first vessel for guiding the negative material through said developing liquid, a second vessel with a second liquid for treating the receiving material, second guide elements for guiding the receiving material to and through said second vessel, a pair of squeeze and transport rollers, in front of which said first and second guide elements terminate in order to pass the negative material and the receiving material, after separate wetting by their respective liquids, in superimposed relationship through said pair of squeeze and transport rollers, and additional squeeze means engaging the receiving material within the zone of said second guide elements and between the second treatment liquid and said pair of squeeze and transport rollers; a device for applying the liquid from said second vessel to the receiving material passing through the second guide element, said device for applying the second liquid comprising a surface weting roller with end faces and stub axles, bearing means for said stub axles arranged
  • said additional squeeze means comprises cooperating squeeze rollers, and comprising additional bearing means, wherein at least one additional contact pressure roller is mounted in these bearing means, and the last mentioned bearing means being so arranged that the contact pressure roller runs under pressure on the surface wetting roller, whereby the device performs a two-fold preliminary squeezing of the receiving material on the surface wetting roller, on the one hand, and in the squeeze roller pair, on the other hand.
  • a device as set forth in claim 7, wherein a contact pressure mechanism associated with the surface wetting roller comprises an endless belt (87), and one of the two vessels is provided with mounting means for two guide rollers and with guide rollers mounted therein, about which guide rollers the endless belt is passed.
  • one of the said vessels contains a guide element arranged at a point above the said second guide elements and extending upstream of the upper section of the surface wetting roller transversely across the path for the receiving material, formed by the second guide elements, so as to guide this material towards and to the surface wetting roller.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
US638028A 1966-05-18 1967-05-12 Developing device for processing copying materials Expired - Lifetime US3509809A (en)

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DEL0053630 1966-05-18

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US3509809A true US3509809A (en) 1970-05-05

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US638028A Expired - Lifetime US3509809A (en) 1966-05-18 1967-05-12 Developing device for processing copying materials

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US (1) US3509809A (cs)
BE (1) BE696069A (cs)
CH (1) CH458068A (cs)
DE (1) DE1522893A1 (cs)
FR (1) FR1515446A (cs)
GB (1) GB1175764A (cs)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223991A (en) * 1979-04-06 1980-09-23 Eastman Kodak Company Image-transfer processor
US4464035A (en) * 1981-11-27 1984-08-07 Hoechst Aktiengesellschaft Processing unit for developing photosensitive materials

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL300921A (cs) *
DE856846C (de) * 1951-05-05 1952-11-24 Fotokopist G M B H Verfahren und Einrichtung zum selbsttaetigen Entwickeln und Kopieren fotografischer Schichttraegerbaender
US3142241A (en) * 1960-03-17 1964-07-28 Zindler Lumoprint Kg Method for developing films, a device and a material for carrying out this method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL300921A (cs) *
DE856846C (de) * 1951-05-05 1952-11-24 Fotokopist G M B H Verfahren und Einrichtung zum selbsttaetigen Entwickeln und Kopieren fotografischer Schichttraegerbaender
US3142241A (en) * 1960-03-17 1964-07-28 Zindler Lumoprint Kg Method for developing films, a device and a material for carrying out this method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223991A (en) * 1979-04-06 1980-09-23 Eastman Kodak Company Image-transfer processor
US4464035A (en) * 1981-11-27 1984-08-07 Hoechst Aktiengesellschaft Processing unit for developing photosensitive materials

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Publication number Publication date
DE1522893A1 (de) 1969-10-30
BE696069A (cs) 1967-09-25
CH458068A (de) 1968-06-15
GB1175764A (en) 1969-12-23
FR1515446A (fr) 1968-03-01

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