US3507650A - Method of depositing viscous photographic reagents - Google Patents

Method of depositing viscous photographic reagents Download PDF

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US3507650A
US3507650A US519888A US3507650DA US3507650A US 3507650 A US3507650 A US 3507650A US 519888 A US519888 A US 519888A US 3507650D A US3507650D A US 3507650DA US 3507650 A US3507650 A US 3507650A
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Prior art keywords
reagent
viscous
sheet
composition
openings
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US519888A
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Edwin H Land
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Polaroid Corp
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Polaroid Corp
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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
    • G03D5/00—Liquid processing apparatus in which no immersion is effected; Washing apparatus in which no immersion is effected
    • G03D5/006—Liquid supply by means of a split or a capillarity
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/48—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus
    • G03B17/50—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus with both developing and finishing apparatus
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/261—Non-bath processes, e.g. using pastes, webs, viscous compositions
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
    • G03C8/32—Development processes or agents therefor
    • G03C8/34—Containers for the agents
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
    • G03C8/42—Structural details

Definitions

  • This invention relates to novel methods and apparatus for applying a viscous reagent to sheet materials and, in particular, to the application of viscous photographic reagents.
  • this viscous reagent v may comprise a light-sensitive emulsion, a sensitizer, e.g., a silver halide optical sensitizer or hypersensitizer, a viscous processing composition for developing an exposed light-sensitive layer, or a coating composition for protecting a photographic print from abrasion, loss of image quality, etc.
  • a sensitizer e.g., a silver halide optical sensitizer or hypersensitizer
  • a viscous processing composition for developing an exposed light-sensitive layer
  • a coating composition for protecting a photographic print from abrasion, loss of image quality, etc.
  • an applicator containing a viscous processing composition for successively developing a plurality of exposed photosensitive elements over a period of time.
  • a primary object of the invention is to provide novel methods and apparatus for applying a viscous reagent to sheet materials.
  • Another object is to provide novel systems for applying a viscous photographic reagent to sheet materials.
  • Still another object is to provide novel systems for ap plying a viscous photographic processing composition to develop an exposed photosensitive element containing a developable image.
  • Yet another object is to provide novel systems wherein a viscous reagent is applied to a sheet material by first depositing it in a predetermined pattern over at least a substantial portion of a surface of the sheet material to provide on the surface first continuous areas substantially free of the reagent and second discontinuous areas containing the reagent; and thereafter spreading the deposited viscous reagent to provide a substantially uniform continuous layer of the reagent upon the sheet material.
  • a further object is to provide a simple and efficient apparatus for rapidly applying a viscous reagent to a sheet material in a substantially uniform continuous layer of a predetermined desired thickness.
  • the invention accordingly comprises the process involving the several steps and the relation and order of one or more of such steps with respect to each of the others and the apparatus possessing the construction, combination of elements and arrangement of parts which are exemplified in the following detailed disclosure, and the scope of the application of which will be indicated in the claims.
  • FIGURE 1 is a partially schematic, partially sectional front view of a novel device of this invention
  • FIG. 2 is an enlarged fragmentary view of a portion of the device of FIGURE 1 during operation thereof;
  • FIG. 3 is a sectional elevational view illustrating the use of this invention in a photographic document-copying apparatus.
  • the present invention is directed to novel methods and apparatus for applying a viscous reagent to sheet materials.
  • a drum-like container 1 for the viscous reagent 2 for the viscous reagent 2.
  • a portion 3 of the wall of the container has a plurality of minute openings constructed and arranged in a desired pattern, preferably in a geometrical configuration which may, for example, take the form of a plurality of generally circular holes aligned at predetermined spaced intervals; While the remaining portion 4 of the container wall is solid, i.e., substantially impervious to air and moisture.
  • these minute openings are preferably of substantially uniform area, and are distributed uniformly in a regular pattern.
  • the viscosity of the reagent with respect to the size of the openings in the container wall is such that the reagent will not normally pass therethrough in the absence of some mechanical force such as will be described subsequently.
  • the container wall may be made of a suitable plastic such as Mylar, Teflon, etc., metal or ,,the like.
  • This squeegee or paddle is shown to have an end portion 7 slidably engaging the container wall and a side arm 8 conforming in general with the Wall contour but spaced slightly therefrom.
  • container 1 is shown to he rotatable and squeegee 6 immovably mounted so that the two elements are relatively movable, it will be noted that in lieu thereof, the container may remain stationary and the squeegee be rotatable therein.
  • the squeegee may be centrally mounted on a collar or equivalent means on shaft 5.
  • belt-cover 9 movable on rollers or pulleys 10 is shown to engage a portion of the wall of container 1.
  • the linear dimension of the area of engagement of beltcover 9 with the container wall is slightly greater than the linear dimension of wall portion 3 for reasons to be described subsequently.
  • belt-cover 9 is preferably made of a suitable material, e.g., a plastic such as Mylar, which is at least impervious to air.
  • Drive means may be employed to rotate one or more of element 10 and, in turn, cause rotation of contaner 1 on shaft 5 due to frictional engagement of the belt-cover to the container wall.
  • rotation of the container may be caused by suitable drive means (not shown) connected to shaft 5.
  • belt-cover 9 may obviously be eliminated, if desired.
  • a spreader surface Positioned outside of container 1 is a spreader surface, shown to be a web of a spreader material 16, e.g., Mylar, Teflon, etc., to which the viscous reagent has little or no adherence.
  • This web may be carried as an andless belt (shown somewhat schematically) moving over rollers in the direction shown by the arrows.
  • equivalent spreader means such as a drum having a smooth surface may also be employed.
  • Container .1 is charged with the desired amount of a viscous photographic developing composition such as those heretofore employed in the art for such purposes.
  • compositions comprise at least a viscosity-providing material such as water-soluble cellulose ethers, e.g., sodium carboxymethyl cellulose, hydroxyethyl cellulose, sodium alginate, starches, etc., and an aqueous medium containing ingredients essential to the development process.
  • a viscosity-providing material such as water-soluble cellulose ethers, e.g., sodium carboxymethyl cellulose, hydroxyethyl cellulose, sodium alginate, starches, etc.
  • this aqueous medium may for example include an alkaline material, e.g., sodium hydroxide, potassium hydroxide, etc.; and a silver halide developing agent, e.g., any of the dihydroxybenzenes or aminophenols commonly employed in the art.
  • the viscous reagent may also contain other ingredients for performing specifically desired functions, e.g., a silver halide solvent such as sodium thiosulfate, silver precipitating nuclei, preservatives, etc.
  • the processing reagent preferably has a relatively high viscosity, for example, on the order of at least 5000 centipoises.
  • an exposed film unit 12 carried on a web or endless belt 11 from an exposure station e.g., a conventional camera lens system, passes between rollers 13 in juxtaposition with the container wall, as shown.
  • the end 7 of the squeegee forces the viscous processing composition into successive openings in the wall passing therebeneath. Since this composition adheres readily to the surface of the film unit and the wall material defining these openings has little or no affinity for the viscous composition, it is possible to make a clean separation of reagent in these openings to the area of the sheet material in juxtaposition therewith (see FIG. 2). Side arm 8 tends to facilitate this clean separation by providing in the area between this arm and the wall an area substantially free of reagent. Moreover, the positive pressure created in this space between arm 8 and the openings containing the reagent tends to facilitate deposition.
  • the absence of reagent above that contained in the openings avoids a meniscus-shaped deposition, so that the shape and dimensions of the deposited reagents (see FIG. 2) conform substantially identically to that of the openings.
  • the respective openings are substantially clean and this absence of clogging reagent permits repeated usage of the container to apply viscous reagent successively to a plurality of sheet materials.
  • the viscosity of the reagent is such that the reagent is substantially non-flowable, i.e., the individual deposits will not merge into a continuous layer by mere flow of the applied reagent.
  • the present invention permits one to obtain a very precise deposition of reagent in a discontinuous pattern, e.g., as a plurality of tiny individual depositions over a desired area of the sheet material.
  • the amount deposited is a direct function of the number, size, thickness and arrangement of the openings in the container wall, it follows therefore that the container Wall may be readily constructed by predetermined calculations to deposit a precise desired amount of reagent, the amount deposited being neither too little nor too much.
  • the sheet material in this case an exposed film unit
  • the sheet material passes from beneath the container, it is rapidly fed between rollers 15 and spring loaded rollers or idlers 14 in superposition with spreader sheet 16 to cause the plurality of individual deposits of reagent to be spread in a substantially uniform continuous layer on the surface of the sheet material.
  • the thickness of the uniform layer of reagent is a function of the amount of reagent deposited and is not dependent upon the provision of a gap between the rollers, as is true in certain prior systems.
  • the thickness of the layer is controlled by the reagent deposited in the foregoing manner, rather than being a function of the gap between the rollers makes it possible to obtain significantly higher linear rates of processing, e.g., on the order of 72"/sec. or higher.
  • very thin uniform layers e.g., on the order of about 1 mil thick may be obtained by employing, for example, a wall no thicker than about 5 mils, the area of each of the openings in the wall being no greater than about 0.3".
  • the point of deposition and that of spreading should preferably be as close as is feasible.
  • This image may be a positive or a negative image in black and white or .in color, depending upon the particular photographic system employed.
  • positive silver transfer images may be obtained upon development of the film unit by known techniques. In gen eral, such procedures for preparing positive transfer images in silver involve the steps of applying to an exposed silver halide emulsion a processing composition containing an aqueous alkaline solution of a silver halide developing agent and a silver halide solvent; developing exposed areas of the emulsion while forming in terms of unexposed areas an imagewise distribution of a soluble silver complex; and transferring this complex, at least in part, by imbibition to a stratum where it is reduced to image silver.
  • a useful filmunit for this purpose is one containing a light opacity-providing material of the nature described and claimed in the copending application of Edwin H. Land, Ser. No. 519,995, or in the copending application of Edwin H. Land and Leonard C. Farney, Ser. 519,884, both filed concurrently as continuations-in-part of applications Ser. No. 368,622 and 368,- 621, respectively, filed May 19, 1964 and now abandoned.
  • these film units contain a layer of light opacity-providing material sufficient to mask effectively the negative image formed by development of the emulsion and to provide a background for viewing the positive transfer image which is formed in a layer above the layer of opacifying material, so that a composite print is formed which contains both a negative and a positive image, but which is viewable by reflected light as a positive silver transfer image.
  • the light opacity-providing material is present in a layer above the emulsion layer; while in application Ser. No.
  • opacity-providing material is contained in the emulsion layer itself and, optionally, an additional layer of opacity-providing material may be provided over the emulsion layer as in the former application.
  • silver precipitating nuclei are preferably provided to facilitate positive image formation. These nuclei may be present initially in a silver-receptive stratum, or they may be present initially in the processing composition itself, as heretofore mentioned.
  • Positive image formation may also be obtained by advancing the film unit between rollers 14-15 in superposition with a separate element containing an image-receiving layer.
  • spreader sheet 16 may be eliminated (spreading being effected by the respective superposed elements passing between rollers 14-15), or spreader sheet 16 may itself contain the image-receiving layer.
  • the device of FIG. 1 may, if desired, be contained in a lighttight box.
  • This lighttight box may take the form of a separate processing unit, or, in lieu thereof, it may also include an exposure station, e.g., a conventional camera lens system.
  • the length of the are formed by wall portion 3 con taining the openings is correlated with respect to the distance between the feed end and trailing end of the sheet material so that viscous reagent is deposited only on desired portions of the sheet material.
  • the length of the container itself is so correlated as to preclude undesired deposition.
  • wall portion 3 is shown to be greater than solid wall portion 4 for purposes of illustration, the converse may in fact be conterriplated, depending upon the dimensions of the sheet material to which the reagent is to be applied.
  • container 1 When not in use, e.g., at completion of operation, container 1 has preferably rotated so that solid wall portion 4 is in down position. In this manner, cover 9 cooperates with the solid wall portion to provide an effective protection against oxidative changes, loss of moisture, etc., thereby preserving the shelf life of the viscous reagent over the contemplated period of usage thereof.
  • a photosensitive element comprising a paper base support containing a layer including a silver iodobrornidegelatin emulsion as the light-sensitive material and titanium dioxide as light opacity-providing material was prepared in the manner described in Example 1 of the aforementioned application Ser. No. 368,621. This photosensitive element was then photoexposed and a viscous processing composition comprising the following proportions of ingredients:
  • Aqueous solution of sodium sulfide (.0156 g. Na S/ cc.)-9.0 c-c.
  • Aqueous solution of lead acetate and cadmium acetate (8.7 g. of lead acetate and 6.3 g. of cadmium acetate/ 300 cc.)192.0 cc.
  • This deposition was ,elfected by forcing the viscous reagent through a material of the character described above having a plurality of substantially round openings of approximately of an inch in diameter arranged in alignment in staggered rows with the centers of the openings about of an inch apart.
  • the material was about 3.5 mils thick.
  • the exposed element containing these individual dots of viscous composition corresponding substantially identically to the thickness and diameter of the openings was then pulled through a pair of rollers in superposition with a Mylar spreader sheet at a rate of about 10l2"/sec. (elapsed time from deposition to spreading was within one second) to press the individual dots into a substantially uniform continuous layer of developing composition. After about two seconds dark time a composite print viewable as a positive print exhibiting excellent resolution was obtained. Following processing, the applicator material, including the openings therein, was observed to be clear of processing composition.
  • EXAMPLE 2 Polacolor Type 108 Land Film (a commercially available fihn sold by Polaroid Corporation, Cambridge, Massachusetts which includes a photosensitive element and an image-receiving element for obtaining positive color reproductions) was photoexposed. To the thus-exposed photosensitive element was applied, as a plurality of individual dots in the manner described in Example 1, a viscous processing composition comprising the following proportions of ingredients:
  • the present invention is also particularly adaptable for use in document duplication systems for preparing one or more visible images of an original.
  • FIG. 3 Apparatus useful for such procedures in accordance with this invention is illustrated in FIG. 3.
  • FIG. 3 This aspect of the invention is illustrated in FIG. 3 as comprising means for exposing successive areas of a lightsensitive sheet to light from an original (document), cutting the sheet into sections each approximately equal in size to the original and including an exposed area, and then treating the sections with a viscous processing agent, in the manner heretofore described, to form a positive image of the original.
  • the operation of the apparatus may be substantially automatic and the construction may be such as to permit the apparatus to be loaded with sulficient materials including the light-sensitive sheet and viscous processing agent to produce a large number of prints in the form of document copies.
  • the apparatus includes an exposure system of the type incorporating means for supporting a document or other two-dimensional surface in position for exposure, means for illuminating the surface to be photographed, an optical system including an objective lens for forming an image of the original at a plane, and means for positioning successive areas of the light-sensitive sheet material for exposure at this plane.
  • This exposure system includes a generally horizontal transparent window comprising the upper wall of a chamber in which are mounted lamps 21 and reflectors 22 for illuminating an original document to be positioned for exposure on the upper surface of window 20.
  • the chamber is defined by walls comprising the housing of the apparatus including a lower wall 23 provided with a centrally located opening 24 in which is mounted an objective lens and shutter assembly 25 of a conventional type employed in photography.
  • the means for positioning successive areas of a lightsensitive image-recording sheet, designated 26, include a support plate 27 disposed in a plane parallel with the axis of lens 25 substantially at the focal surface of the lens.
  • a mirror 28 arranged substantially at a 45 angle with respect to both the lens axis and support plate 27 is provided for redirecting light from the lens toward the support plate.
  • a frame 29 is mounted between the support plate' and the mirror closely adjacent the support plate for holding sections of sheet 26 against the support plate.
  • Sheet 26 is supplied coiled on a spool 30 mounted behind and beneath mirror 28 and extends from the spool around a feed roll 31 between the latter and a second feed roll 32 located in juxtaposition with roll 31 closely adjacent the lower edges of support plate 27 and frame 29,
  • Feed rolls 31 and 32 function to advance sheet 26 from spool 30 upwardly between the support plate and frame into position for exposure by light transmitted by lens and shutter assembly 25 and reflected from mirror 28.
  • a second pair of juxtaposed feed rolls 33 and 34 for advancing the sheet material upwardly from between the frame and support plate into the section of the apparatus in which treatment with the viscous processing agent is effected.
  • a rotary knife 35 and an opposed anvil 36 are located between feed rolls 33 and 34 and the upper edges of the support plate and frame for severing each exposed section of the image-recording sheet from the next succeeding section of the image-recording sheet located in position for exposure.
  • a section of sheet 26 is advanced upward between the support plate and frame by feed rolls 31 and 32 into the bite of feed rolls 33 and 34. Movement of the sheet is then arrested, the section of the sheet between the support plate and frame is exposed, and then feed rolls 33 and 34 are rotated to advance the exposed section of the image-recording sheet upwardly from between the frame and plate while, at the same time,
  • rolls 31 and 32 are driven, at least during the initial rotary cycle of rolls 33 and 34, to advance the upper leading edge of the image-recording sheet from adjacent anvil 36 into the bite of rolls 33 and 34.
  • the thus-exposed element moves from rollers 33 and 34 into the processing chamber of the apparatus where application of a viscous developing composition is effected in the described manner.
  • means for guiding each element 26 within a light-free environment and thereafter delivering the developed element now containing a visible image from the apparatus.
  • These means are shown to comprise guide wires 37 to control the path of movement following movement through rollers 14 and 15 to spread the viscous processing reagent.
  • Wire guides are provided in order to reduce the area of contact between the sheets and the guide means so as not to interfere with the processing of the sheet and to reduce friction between the sheet and the guide means.
  • Each sheet 26 is permitted to fall under the force of gravity downwardly through a chute defined by guide wires 37 and from the apparatus through an opening 38 in the housing thereof where the developed sheet 26 containing a visible record of the original subject matter may be collected in a suitable tray or the like (not shown).
  • Means such as microswitches (not shown) may be provided along the path of movement of the sheets in position to be engaged and actuated by the sheets so as to control the operation of the apparatus including the rotation of the various feed rolls, the processing device, etc. Also, adjacent the path of movement of the sheets there may be provided means such as a source of infrared radiation and/ or hot air for drying each sheet 26 before it emerges from the apparatus.
  • a source of infrared radiation and/ or hot air for drying each sheet 26 before it emerges from the apparatus.
  • the path which the sheet means must follow from the application of the processing reagent until it passes through opening 38 should be of a length suflicient to insure retention of the sheet in a light-free environment for the requisite processing time.
  • feed rolls, guide wires and the like may, if desired, be employed to define a tortuous path of movement of each sheet 26 to provide the requisite time in a light-free environment.
  • belt 11 may be eliminated and feed rollers or other such drive means may be employed for advancement of the sheet material to be treated.
  • the web of spreader material 16 may, if desired, be eliminated and spreading accomplished merely by means of rollers 14-15.
  • this spreader material in terms of the smooth uniform character of the layer of viscous reagent after spreading.
  • steel rollers or the like to which some of the reagent may tend to adhere can be employed.
  • element *6 may also be varied according to individual wishes or needs, and various types of paddles, doctor blades, etc., may be employed in lieu thereof.
  • novel devices of this invention may be fully or partially automated by means of appropriate timing devices, microswitches, etc., or they may be designed for manual operation.
  • the present invention provides a simple and efiicient' means for-applying a viscous reagent in a substantially uniform continuous layer upon a surface of a sheet material.
  • the essence of the invention is the provision of a method and apparatus for applying a predetermined precise amount of reagent from a source normally containing more reagent than is contemplated to be applied to any single sheet material, without clogging of the apparatus, over-run and/or unwanted deposition of excess reagent either on the sheet material itself or upon other surfaces.
  • the present invention permits very rapid application of reagent, e.g., very rapid treatment of exposed photosensitive elements, as noted by the excellent results obtained at speeds on the order of 72"/ sec. in the procedure described in the Example 1.
  • This rapid processing of exposed photosensitive elements is of particular importance in document copying systems such as illustrated in FIG. 3.
  • a process of applying a viscous photographic reagent to a sheet material which comprises pressing said sheet material against an applicator containing a plurality of minute openings; forcing said viscous reagent through said openings while in juxtaposition therewith to deposit on a surface of saidsheet material a predetermined amount of said reagent in a pattern corresponding to said openings, and to provide on said surface first continuous areas substantially free of said reagent and sec: ond discontinuous areas containing said reagent; and thereafter spreading said viscous reagent to provide a substantially uniform continuous layer of said reagent upon said sheet material.
  • a continuous process for applying a viscous photographic reagent to a sheet material which comprises advancing said sheet material to an applicator station in juxtaposition with an applicator member having a plurality of uniformly distributed small openings of substantially uniform size; depositing said reagent from a source thereof through said openings to a surface of said sheet material to provide on said surface a pattern of reagent corresponding to said openings, said pattern containing first continuous areas substantially free of said reagent and second discontinuous areas containing said reagent, said openings in said applicator member being constructed and arranged whereby to provide a predetermined amount of reagent on said surface; continuously advancing said sheet material to a spreader station; and spreading said viscous reagent to provide a substantially uniform continuous layer of said reagent upon said sheet material.
  • said photosensitive element includes a light-sensitive silver halide emulsion layer and said viscous processing composition includes an aqueous alkaline solution of a silver halide developing agent.
  • processing com-position further includes silver precipitating nuclei for facilitating formation of said transfer image.
  • a viscous processing composition is applied to the surface of a film unit including an exposed light-sensitive silver halide emulsion layer to develop said emulsion and to form a silver transfer image
  • steps which comprise placing said film unit juxtaposition with an applicator containing a plurality of minute openings; forcing a viscous processing composition through said openings while in juxtaposition to deposit on a surface of said sheet material a predetermined amount of said viscous composition in a pattern corresponding to said openings, whereby to provide on said surface first continuous areas substantially free of said composition and second discontinuous areas containing said composition, said openings in said applicator being constructed and arranged to provide a predetermined amount of said composition on said surface; and before said viscous composition in said second areas has initiated development at least to any appreciable extent, spreading said viscous composition to provide a substantially uniform layer of said reagent upon said sheet material to develop said emulsion and to form said transfer image.
  • said film unit includes an opacifying material and said transfer image is formed on said surface, said opacifying material being present in' an amount sufficient to mask effectively said negative image while at the same time providing a background for viewing said transfer image as a positive silver reflection print.
  • a process for forming silver transfer images which comprises advancing a film unit including an exposed silver halide emulsion layer to an applicator station including a source of a viscous processing composition; applying a predetermined metered amount of said processing composition from said source as a multiplicity of relatively small separate deposits on a surface of said film unit to provide on said surface first continuous areas substantially free of said composition and second discontinuous areas containing said composition; substantially immediately thereafter and before said composition has initiated development, at least to any appreciable extent, advancing said film unit from said applicator station to a spreader station where said composition is spread to form a substantially uniform continuous layer on said surface; and allowing said composition to permeate said surface to develop said emulsion layer and to form said transfer image.
  • said film unit includes an opacifying material and said transfer image is formed on said surface, said opacifying material being present in an amount sufiicient to mask effectively said negative image while at the same time providing a background for viewing said transfer image as a positive silver reflection print.
  • a continuous system for preparing transfer images in silver which comprises the steps of advancing a photosensitive element including a silver halide emulsion layer to an exposure station; exposing said element to actinic light at said exposure station to form a developable image; at some time subsequent to exposure advancing said exposed element to an applicator station including a source of a viscous processing composition comprising a viscous reagent and an aqueous alkaline processing solution; depositing a predetermined metered amount of said processing composition from said source in a predetermined pattern over at least a substantial surface of said exposed element to provide on said surface first continuous areas substantially free of said composition and second discontinuous areas containing said composition; substantially immediately thereafter and, before said composition has initiated development to any appreciable extent, advancing said film unit from said applicator station to a spreader station; at said spreader station, spreading said deposited processing composition to substantially uniform continuous layer on said surface; and permeating said emulsion layer with said layer of processing composition to develop said exposed emulsion layer and to form said transfer
  • a device for obtaining visible images which comprises an exposure station including means for exposing a photosensitive element; means for advancing a phtosensitive element to said exposure station; an applicator station for depositing a viscous photograph processing composition to said photosensitive element after exposure thereof, said applicator station including means comprising a non-porous material having a plurality of minute openings arranged in geometric configuration over at least a portion thereof, said openings being of a predetermined size and configuration whereby to permit deposition of a predetermined amount of said composition in a discontinuous pattern on a surface of said exposed photo sensitive element, said applicator station further including pressure means for forcing said reagent through said openings to said element; means for advancing said element from said exposure station to said applicator station; a spreader station including means for spreading said deposited viscous composition to provide a substantially uniform continuous layer of said processing composition on said element to develop said exposed element and to form said visible image; and means for advancing 12 said element from said applicator station to said spreader station.
  • said applicator station comprises Wall means defining a container for said composition, at least a portion of said wall means having a plurality of small openings constructed and arranged so as to be adaptable for depositing a predetermined desired amount of said reagent in said discontinuous pattern and pressure-providing means within said container for forcing said composition through said openings to said element, said Wall means having said openings and said pressure-providing means being relatively movable.
  • a device as defined in claim 18 including means for releasably engaging said sheet-material in'juxtaposition with said wall means having said openings.
  • said pressure-providing means comprises at least one doctor-like member fixedly mounted at a point within said container and extending toward said wall means, whereby to force viscous reagent between the free end of said element and said 'wall means adjacent thereto into said openings as said container is rotated.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US519888A 1966-01-11 1966-01-11 Method of depositing viscous photographic reagents Expired - Lifetime US3507650A (en)

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DE (1) DE1621965B1 (es)
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GB (1) GB1182301A (es)

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US4965618A (en) * 1989-08-02 1990-10-23 Eastman Kodak Company Method and apparatus for transporting and liquid treating indeterminate lengths of web material
US20180207415A1 (en) * 2016-05-20 2018-07-26 Raphas Co., Ltd. Method for manufacturing microneedle

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FR2286416A1 (fr) * 1974-09-27 1976-04-23 Agfa Gevaert Procede de developpement d'emulsions du type de lippmann
DE3137763A1 (de) * 1981-09-23 1983-04-14 Mathias 4815 Schloss Holte Mitter "siebzylinder zur aufbringung von fluessigkeiten enthaltenden auftragsmassen auf flaechige waren, z.b. warenbahnen od.dgl."
DE3222335C2 (de) * 1982-06-14 1985-01-03 Planatolwerk W. Hesselmann, Chemische und Maschinenfabrik für Klebetechnik, GmbH & Co KG, 8201 Rohrdorf Vorrichtung zum Auftragen eines Klebstoffes in Form einer Queranleimung auf eine Bahn
DE3700127A1 (de) * 1987-01-03 1988-07-14 Guenter Butz Verfahren und vorrichtung zum auftragen von medien in aerolisierter bzw. zerstaeubter, verdampfter, fluessiger oder verschaeumter form

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GB511281A (en) * 1937-01-13 1939-08-16 Ig Farbenindustrie Ag Improvements in multi-colour photographic transparencies
GB634169A (en) * 1942-12-05 1950-03-15 Gevaert Photo Prod Nv Improvements in or relating to the production of corrected photographic colour-component
US2543181A (en) * 1947-01-15 1951-02-27 Polaroid Corp Photographic product comprising a rupturable container carrying a photographic processing liquid
US2662882A (en) * 1947-08-09 1953-12-15 Gen Mills Inc Process of preparing a hydrophilic colloid
GB746948A (en) * 1952-10-22 1956-03-21 Kodak Ltd Improvements in photographic reproduction processes and in materials therefor
US2893315A (en) * 1955-07-26 1959-07-07 Riegel Textile Corp Means for producing a textile fabric having exceptional wear resistance
GB874046A (en) * 1958-05-12 1961-08-02 Polaroid Corp Photographic transfer processes and products for use in such processes
US3036927A (en) * 1959-11-30 1962-05-29 Toscony Inc Method of coating vinyl film with a surfacing color
US3086879A (en) * 1958-03-05 1963-04-23 Frederic H Lassiter Metallized products and foils and method of forming the same
US3179517A (en) * 1959-08-24 1965-04-20 Eastman Kodak Co Web processing method and composition
US3313270A (en) * 1964-01-03 1967-04-11 Internat Paper Box Machine Co Pattern coating apparatus

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FR592517A (fr) * 1925-01-31 1925-08-04 Machine à pochoir rotatif cylindrique pour l'impression continue des tissus et papiers avec pâtes plastiques, encres ou teintures
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FR780953A (fr) * 1934-11-08 1935-05-07 Tissu décoratif obtenu par application sur pâte plastique, par enduction totale et partielle, d'une dentelle, résille ou tissu ajouré
DE821617C (de) * 1949-07-24 1951-11-19 Wilhelm Fleissner Farbauftragsvorrichtung
DE1121927B (de) * 1960-01-16 1962-01-11 Agfa Ag Entwicklungsmaschine fuer fotografische Schichttraeger

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Publication number Priority date Publication date Assignee Title
GB511281A (en) * 1937-01-13 1939-08-16 Ig Farbenindustrie Ag Improvements in multi-colour photographic transparencies
GB634169A (en) * 1942-12-05 1950-03-15 Gevaert Photo Prod Nv Improvements in or relating to the production of corrected photographic colour-component
US2543181A (en) * 1947-01-15 1951-02-27 Polaroid Corp Photographic product comprising a rupturable container carrying a photographic processing liquid
US2662882A (en) * 1947-08-09 1953-12-15 Gen Mills Inc Process of preparing a hydrophilic colloid
GB746948A (en) * 1952-10-22 1956-03-21 Kodak Ltd Improvements in photographic reproduction processes and in materials therefor
US2893315A (en) * 1955-07-26 1959-07-07 Riegel Textile Corp Means for producing a textile fabric having exceptional wear resistance
US2893314A (en) * 1955-07-26 1959-07-07 Riegel Textile Corp Textile fabric having spaced portions bearing wear resistant resin dots and method and apparatus for producing same
US3086879A (en) * 1958-03-05 1963-04-23 Frederic H Lassiter Metallized products and foils and method of forming the same
GB874046A (en) * 1958-05-12 1961-08-02 Polaroid Corp Photographic transfer processes and products for use in such processes
US3179517A (en) * 1959-08-24 1965-04-20 Eastman Kodak Co Web processing method and composition
US3036927A (en) * 1959-11-30 1962-05-29 Toscony Inc Method of coating vinyl film with a surfacing color
US3313270A (en) * 1964-01-03 1967-04-11 Internat Paper Box Machine Co Pattern coating apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4965618A (en) * 1989-08-02 1990-10-23 Eastman Kodak Company Method and apparatus for transporting and liquid treating indeterminate lengths of web material
WO1991002291A1 (en) * 1989-08-02 1991-02-21 Eastman Kodak Company Method and apparatus for transporting and liquid treating indeterminate lengths of web material
US20180207415A1 (en) * 2016-05-20 2018-07-26 Raphas Co., Ltd. Method for manufacturing microneedle
US10507312B2 (en) * 2016-05-20 2019-12-17 Raphas Co., Ltd. Method for manufacturing microneedle

Also Published As

Publication number Publication date
CH518132A (de) 1972-01-31
GB1182301A (en) 1970-02-25
DE1621965B1 (de) 1972-07-06
FR1509295A (fr) 1968-01-12
BE692394A (es) 1967-07-10

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