US3357337A - Photographic process and apparatus for producing photographic images - Google Patents

Photographic process and apparatus for producing photographic images Download PDF

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Publication number
US3357337A
US3357337A US456422A US45642265A US3357337A US 3357337 A US3357337 A US 3357337A US 456422 A US456422 A US 456422A US 45642265 A US45642265 A US 45642265A US 3357337 A US3357337 A US 3357337A
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US
United States
Prior art keywords
sheet
liquid
roll
image
rolls
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
US456422A
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English (en)
Inventor
Edwin H Land
Richard J Chen
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.)
Polaroid Corp
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Polaroid Corp
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 Polaroid Corp filed Critical Polaroid Corp
Priority to US456422A priority Critical patent/US3357337A/en
Priority to GB19242/66A priority patent/GB1121316A/en
Priority to SE06602/66A priority patent/SE339403B/xx
Priority to BE681087D priority patent/BE681087A/xx
Priority to AT462066A priority patent/AT285323B/de
Priority to DE19661547996 priority patent/DE1547996A1/de
Priority to NL6606740A priority patent/NL6606740A/xx
Priority to CH716866A priority patent/CH470005A/de
Application granted granted Critical
Publication of US3357337A publication Critical patent/US3357337A/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
    • 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
    • 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
    • G03D5/06—Applicator pads, rollers or strips
    • G03D5/067—Rollers
    • 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

Definitions

  • This invention relates to a method and apparatus for applying an excess of processing liquid to one side only of an exposed photographic sheet to form a visible image by a diffusion transfer process and thereafter removing the excess processing liquid prior to the photographic sheet undergoing any substantial diffusion of image-forming substances therefrom.
  • the apparatus comprises a reservoir for supplying processing liquid to a cavity and a pair of juxtaposed rollers, one of the rollers being mounted with a portion of its periphery located within the cavity so as to be immersed in the processing liquid, the other roller presenting a surface having a minimum contact area with the photographic sheet.
  • An exposed photographic sheet is passed through the bite of the rollers and then through a second pair of juxtaposed rollers to remove the excess liquid from the sheet.
  • This invention further relates to photographic processes and apparatus for exposing and treating, with a liquid, a photosensitive image-recording sheet material to produce visible images in the sheet material and, more particularly, to processes and apparatus useful in document copying.
  • This image-recording sheet material typically comprises a support, such as paper, and at least one layer thereon containing a light sensitive material, e.g., a silver halide emulsion, and an outer layer comprising a translucent material such as finely divided titanium dioxide, calcium carbonate, magnesium oxide, etc., dispersed in a suitable permeable colloidal carrier or matrix such as gelatin, which is permeable to an aqueous processing liquid.
  • a light sensitive material e.g., a silver halide emulsion
  • an outer layer comprising a translucent material such as finely divided titanium dioxide, calcium carbonate, magnesium oxide, etc., dispersed in a suitable permeable colloidal carrier or matrix such as gelatin, which is permeable to an aqueous processing liquid.
  • the translucent pigment may be incorporated in the layer containing the light-sensitive material and/or may comprise a separate outer layer which may also contain silver precipitating nuclei and is sufficiently transparent to permit exposure of the light-sensitive layer therebeneath while at the same time being sufiiciently opaque to provide the requisite background for a p sitive silver image transferred thereto by diffusion and to mask a negative image formed thereunder.
  • This photosensitive sheet material is particularly useful for duplicating documents because it forms the positive transfer print or copy so that only a single sheet is required for processing.
  • Processing of the exposed image-recording sheet involves image formation by silver halide diffusion-transfer reversal and is accomplished by applying a non viscous, aqueous liquid-processing agent, including a silver halide developer and a silver halide complexing agent, to the side of the sheet opposite the support so as to impregnate the light-sensitive layer with suflicient processing liquid to produce a positive silver transfer image on the surface of the translucent layer.
  • a non viscous, aqueous liquid-processing agent including a silver halide developer and a silver halide complexing agent
  • processing liquid it is highly desirable to apply only the minimum amount of processing liquid required for the obvious reasons that the processing agent is expensive and the sheet, following processing, must be dried; and it is also desirable to apply this liquid to only one side of the sheet and thereby minimize the amount of liquid which must be applied, absorbed and then removed from the sheet. It is also a requisite of the process and apparatus that the processing liquid be applied and impregnated into the light-sensitive layer uniformly and in such a way that every portion of the light-sensitive layer is subjected to treatment of the same duration.
  • Objects of the invention are: to provide novel and improved photographic processes and apparatus for exposing a composite light-sensitive and image-receiving sheet and process said sheet-by uniformly applying a non-viscous liquid-processing agent to one side of the sheet and absorbing a predetermined quantity of the liquid into the sheet; and to provide processes and apparatus as described in which the liquid-processing agent is applied by a coating roll partially immersed in the liquid and rotated against the sheet to transfer the liquid thereto.
  • Other objects of the invention are to provide processes and apparatus of the type described in which the processing liquid is applied to one side of the image-recording sheet in an amount greater than that required to effect processing, the liquid is allowed to remain on the sheet until a predetermined uniform quantity is absorbed by the image-recording layer and excess liquid is removed from the sheet prior to any substantial diffusion of image-forming substances; and to provide processes and apparatus as described in which the processing liquid is applied and removed from the sheet progressively while the sheet is moved continuously so as to insure uniform absorption of the processing liquid by all portions of the sheet.
  • the processing liquid is aqueous, quite alkaline and hence, highly corrosive, deteriorates upon exposure to the atmosphere and is subject to contamination by the residue thereof.
  • the invention has as a further object, the provision of a novel and improved backing roll structure for supporting successive sheets against a coating roll and moving the sheets tangentially to the surface of the coating roll in a direction opposite to the direction of movement of the surface while minimizing contact between the backing and coating rolls.
  • 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 sectional elevational view of photo- 3 graphic document-copying apparatus embodying the invention
  • FIG. 2 is an enlarged fragmentary sectional view of a portion of the apparatus of FIGURE 1;
  • FIG. 3 is an enlarged fragmentary sectional view taken through components of the apparatus and sheet material illustrating the method of the invention.
  • FIG. 4 is a fragmentary perspective view of a component of the apparatus.
  • the apparatus of the invention is illustrated in FIG- URE 1 as comprising means for exposing successive areas of a light-sensitive 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 liquid-processing agent to form a positive image of the original.
  • the operation of the apparatus is substantially automatic and the construction is such as to permit the apparatus to be loaded with sufiicient materials including the light-sensitive sheet and liquid-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 12 and reflectors 14 for illuminating an original document positioned for exposure on the upper surface of window 10.
  • the chamber is defined by walls comprising the housing of the apparatus including a lower wall 16 provided with a centraly located opening 18 in which is mounted an objective lens and shutter assembly 20 of a conventional type employed in photography.
  • the means for positioning successive areas of a lightsensitive image-recording sheet, designated 22, include a support plate 24 disposed in a plane parallel with the axis of lens 20 substantially at the focal surface of the lens.
  • a mirror 26 arranged substantially at a 45 angle with respect to both the lens axis and support plate 24 is provided for redirecting light from the lens toward the support plate.
  • a frame 28 is mounted between the support plate and the,- mirror closely adjacent the support plate for holding sections of sheet 22 against the support plate.
  • Sheet 22 is supplied coiled on a spool 30 mounted behind and beneath mirror 26 and extends from the spool around a feed roll 32 between the latter and a second feed roll 34 located in juxtaposition with roll 32 closely adjacent the lower edges of support plate 24 and frame 28, with the bite of the rolls located substantially in the same plane as the support plate.
  • Feed rolls 32 and 34 function to advance sheet 22 from spool 30 upwardly between the support plate and frame into position for exposure by light transmitted by lens and shutter assembly 20 and reflected from mirror 26.
  • a second pair of juxtaposed feed rolls 36 and 38 for advancing the sheet material upwardly from between the frame and support plate into the section of the apparatus in which treatment with the liquid-processing agent is effected.
  • a rotary knife 40 and an opposed anvil 42 are located between feed rolls 36 and 38 and the upper edges of the support plate and frame for severing each exposed sectionof the image-recording sheet from the next succeeding section of the image-recording sheet located in position for exposure.
  • a section of sheet 22 is advanced upward between the support plate and frame by feed rolls 3-2 and 34 into the bite of feed rolls 36 and 38.
  • Movement of the sheet is then arrested, the section of the sheet between the support plate and frame is exposed, and then feed rolls 36 and 38 are rotated to advance the exposed section of the imagerecording sheet upwardly from between the frame and area while, at the same time, advancing another section of the image-recording sheet into position for exposure.
  • the trailing edge of the exposed section of the imagerecording sheet passes between knife 40 and anvil 42, the knife is rotated, severing the section at its trailing edge.
  • rolls 32 and 34 are driven, at least during the initial rotary cycle of rolls 36 and 38, to advance the upper leading edge of the image-recording sheet from adjacent anvil 42 into the bite of rolls 36 and 38.
  • the combined image-recording and image-receiving sheet (designated 22 in FIG. 3) as previously noted, comprises a support 44 preferably of paper, and at least another layer 46 including a silver halide emulsion and an opaque, white pigmented outer layer.
  • a combined photo-sensitive and image-receiving sheet useful in the method of the invention was prepared as follows: paper having a thickness of about .0025 inch and sold by Fitchburg Paper Company under the designation Photographic Grade Paper was coated with a first layer composed essentially of a gelatino silver halide emulsion, gelatin and a wetting agent. This first layer had a dry weight of approximately 3 grams per square foot.
  • a second layer was applied composed essentially of titanium dioxide dispersed in gelatin and had a dry weight of approximately 0.8 gram per square foot.
  • a third or outer layer was applied composed of gelatin in which silver precipitating nuclei Were dispersed and this third layer had a dry weight of approximately 0.1 gram per square foot.
  • Roll coating has been found to be a most convenient method of applying a nonviscous liquid, i.e., having substantially the viscosity of water, to one side of a sheet without wetting the opposite side of the sheet, and is particularly advantageous when the liquid to be applied is highly corrosive, subject to decomposition by exposure to the atmosphere, and is contaminated by residue resulting from evaporation of the water.
  • the method of roll coating is quite simple and involves partially immersing a roll in a quantity of the liquid and rotating the roll while supporting and moving the sheet against the roll with the surface of the sheet substantially tangent to the surface of the roll.
  • the liquid applicator means of the invention comprise a generally cylindrical applicator roll 48 formed, of a material which is unaffected by the aqueous alkaline processing liquid. Roll 48 is mounted for rotation about a horizontal axis with the lower portion of the roll periphery disposed in a cavity 50in a member 51 into which the processing liquid, designated 52, is introduced.
  • Liquid 52 may be supplied in a container 54 coupled to the cavity by a conduit 56 and suitable valve means (not shown) for controlling the flow of liquid from container 54 to cavity 50.
  • a backing roll generally designated 58 is mounted in juxtaposition with coating roll 48 for rotation about an axis substantially parallel with the axis of the coating roll and, in the form shown, located above the axis of the coating roll.
  • Backing roll 53 functions to support sheet 22 against the coating roll and move the sheet relative to the coating roll upwardly at an angle (to the right, viewing FIGS. 1 and 2) while the coating roll is rotated in a counterclockwise direction so that the surface of the coating roll, at the line of t-angency with the sheet, is moved in the opposite direction.
  • the applicator is designed to apply the processing liquid to one side of each of a succession of separate sheets so that the backing roll contacts the coating roll when there is no sheet passing between the two rolls.
  • the backing roll is provided with a plurality of circumferential collars 60 axially spaced along the length of the backing roll.
  • Each of collars 60 includes an outer knife edge for contacting both the coating roll and the rear surfaces of the sheets for supporting the sheets against the coating roll while minimizing the area of contact between the backing roll and the coating roll.
  • the coating and backing rolls commence to rotate and a predetermined quantity of processing liquid 52 is dispensed from container 54 into cavity 5% where it is picked up by the coating roll on the surface thereof and carried around the coating roll into contact with the sheet as the sheet is advanced by the backing roll, between the coating and backing rolls relative to the coating roll.
  • means for removing residual liquid from the coating roll and cavity following each coating operation.
  • These means comprise an opening 62 in the bottom of cavity 50 and a flexible blade-like wiper 64 mounted within the cavity in closing relation to opening 62.
  • Rod 66 is provided coupled with wiper 64 for moving the wiper upwardly from the closed position, shown in FIG. 2, to an open position at which the edge of wiper 64 bears against the surface of the roll for removing the liquid therefrom, and opening 62 is open so that the liquid within the cavity is free to flow therefrom.
  • Excess processing liquid is removed from the sheet by passing the sheet between a pair of wringer roll-s, designated 68 and 70, mounted in juxtaposition above and to one side of the applicator and backing rolls with the bite of the wringer rolls located substantially in the plane of movement of the sheets from between the applicator and backing rolls.
  • ringer rolls 68 and 70 are mounted for rotation with their axes substantially in a common plane and are biased toward one another so as to apply compressive pressure to the sheets as they pass between the wringer rolls.
  • At least wringer roll 68 is formed with a smooth peripheral surface which will not mar the wet surface of a sheet and the roll preferably is formed with at least an outer layer of an elastomer such as rubber, which is compressible and has a high coefiicient of friction.
  • the distance between the nips of the applicator and backing rolls and the wringer rolls was two inches and the liquid absorbed by the sheet, i.e., not removed from the sheet at the wringer rolls, as 1.0 cc. After passage between the wringer rolls the sheet was retained in the dark for a period of ten to fifteen seconds during which a dense black positive transfer image was formed on the white pigmented side of the sheet.
  • Suitable means for this purpose may comprise wringer roll 70 which is formed with an axial conduit 74 coupled with means such as a vacuum pump for reducing the pressure within the conduit and radial holes 76 extending outwardly from the conduit through the outer peripheral surface of the roll.
  • the liquid comprising meniscus 72 is drawn from the nip of the rolls through openings 76 into conduit 74, leaving the rolls in an essentially dry condition in readiness for receiving the next succeeding sheet therebetween.
  • Means are provided for guiding each sheet 22 from the applicator roll between the wringer rolls and thence along a path within a light-free environment and thence delivering the processed sheet from the apparatus.
  • These means include guide wires 78 located adjacent opposite sides of the path of movement of the sheet from the applicator roll to the wringer roll and extending from near the nip of the applicator and backing rolls generally parallel with one another in the direction of movement of the sheets to the nip of the wringer rolls.
  • 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 reduce friction between the sheet and the guide means.
  • Another set of guide wires 80 are provided above the nip of wringer rolls 68 and 70 extending upwardlyto point-s closely adjacent the nip of a pair of juxtaposed feed rolls 82 and 84.
  • Another pair of juxtaposed feed rolls 86 and 88 are provided to one side (left, viewing FIG. 2) and slightly above feed rolls 82 and 84, and a continuous belt or Web 90 is engaged around feed rolls 84 and 86 and extending between feed rolls 84 and 82 and between rolls 86 and 88.
  • the purpose of belt 90 is to change the direction of the path of movement of a sheet 22 so that the sheet passes between feed rolls 82 and 84 around feed roll 82 and thence around feed roll 88 between the latter, the belt and feedroll 86.
  • Guide wires 94 are provided between feed rolls 82 and 88 adjacent belt 90 for supporting and guiding a sheet 22 during movement of the sheet from between the belt and feed roll82 to feed roll 88 where it is again engaged between the latter and the belt. From feed roll 88 a sheet 22 is permitted to fall under the force of gravity downwardly through a chute defined by guide wires 96 and from the apparatus through an opening in the housing thereof.
  • the path which the sheet must follow from between wringer rolls 68 and 70 until the trailing edge of the sheet moves from engagement between feed roll 88 and belt 90 is of a length sufficient to insure retention of the sheet in a light-free environment for the requisite processing time, e.g., ten to fifteen seconds, with the sheet being advanced at the same speed as during movement between the wringer rolls, e.g., two to three inches per second.
  • 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 coating roll and the knife. 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 22 before it emerges from the apparatus.
  • the apparatus of the invention incorporates means for exposing and then treating with a liquid a succession of composite image-recording and image-receiving sheets to produce a succession of positive photographic prints, particularly in the form of copies of documents.
  • the apparatus applies an excess of a highly corrosive non-viscous liquid to one side of each sheet, permits a predetermined amount of the liquid to be absorbed uniformly into the sheet, removes the excess liquid from the sheet and then retains the sheet within a lightfree environment until processing -is complete. This is all accomplished with apparatus which is simple in construction, is compact and which performs automatically.
  • the invention provides a process by which it is possible to uniformly impregnate a succession of photosensitive imagerecording sheets with an aqueous alkaline processing liquid subject to deterioration upon exposure to the atmosphere to producve a high quality positive transfer image in each sheet, and to deliver each sheet as an essentially dry copy of a document.
  • said method comprising the steps of:
  • said transfer member comprises a generally cylindrical roll, impermeable to said liquid and partially immersed in a body of said liquid, and said sheet is moved relative to said roll while said roll is rotated withinsaid liquid and against said sheet.
  • Photographic apparatus for applying a free-flowing processing liquid to one side only of a photographic sheet to impregnate said sheet with a uniformly distributed, predetermined quantity of said liquid within a predetermined time interval, said apparatus comprising, in combination:
  • cavity means for holding a body of said liquid
  • an applicator roll having a smoooth, liquid impervious peripheral surface mounted for rotation with a portion of its periphery located within said cavity means so as to be immersed in said body of liquid;
  • the last-mentioned means comprising rotatable means including means providing for minimum contact with said sheet and said applicator roll for supporting said sheet and moving said sheet relative to said applicator roll;
  • wringer rolls mounted a predetermined distance from said applicator roll and rotatable means and biased toward one another for applying compressive pressure to said sheet to remove excess liquid from said sheets during movement thereof between said wringer rolls;
  • said rotatable means includes a plurality of axially spaced annular collars each having a sharpened outer peripheral edge for contacting said sheet.
  • said means for guiding said sheet comprise narrow spaced members extending from adjacent said applicator roll to adjacent the wringer rolls for contacting said wet side of said sheet along substantially parallel lines extending in the direction of movement of said sheets.
  • Photographic apparatus as defined in claim 13 including means for removing substantially all of said liquid from said surface of said applicator roll following application of said liquid to said sheet.
  • Photographic apparatus as defined in claim 13 including means for removing substantially all of said excess liquid from the bite of said wringer rolls.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US456422A 1965-05-17 1965-05-17 Photographic process and apparatus for producing photographic images Expired - Lifetime US3357337A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US456422A US3357337A (en) 1965-05-17 1965-05-17 Photographic process and apparatus for producing photographic images
GB19242/66A GB1121316A (en) 1965-05-17 1966-05-02 Improvements relating to photographic reproduction processes and apparatus
SE06602/66A SE339403B (xx) 1965-05-17 1966-05-13
AT462066A AT285323B (de) 1965-05-17 1966-05-16 Photographisches Verfahren und Gerät zum Herstellen eines sichtbaren Übertragungsbildes auf einem photographischen Blattmaterial
BE681087D BE681087A (xx) 1965-05-17 1966-05-16
DE19661547996 DE1547996A1 (de) 1965-05-17 1966-05-16 Verfahren zur Erzeugung von UEbertragungsbildern und photographischer Apparat zur Durchfuehrung des Verfahrens
NL6606740A NL6606740A (xx) 1965-05-17 1966-05-17
CH716866A CH470005A (de) 1965-05-17 1966-05-17 Photographisches Verfahren zur Erzeugung eines Übertragungsbildes und photographischer Apparat zur Durchführung des Verfahrens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US456422A US3357337A (en) 1965-05-17 1965-05-17 Photographic process and apparatus for producing photographic images

Publications (1)

Publication Number Publication Date
US3357337A true US3357337A (en) 1967-12-12

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Application Number Title Priority Date Filing Date
US456422A Expired - Lifetime US3357337A (en) 1965-05-17 1965-05-17 Photographic process and apparatus for producing photographic images

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US (1) US3357337A (xx)
AT (1) AT285323B (xx)
BE (1) BE681087A (xx)
CH (1) CH470005A (xx)
DE (1) DE1547996A1 (xx)
GB (1) GB1121316A (xx)
NL (1) NL6606740A (xx)
SE (1) SE339403B (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424074A (en) * 1966-11-02 1969-01-28 Polaroid Corp Sealing means for photographic processing apparatus
US3472590A (en) * 1966-10-17 1969-10-14 Itek Corp Photocopy apparatus
US3593642A (en) * 1967-05-16 1971-07-20 Ciba Ltd Strip handling apparatus
JPS4828443U (xx) * 1971-08-11 1973-04-07
US4298267A (en) * 1980-06-24 1981-11-03 Polaroid Corporation Processing roller cleaner
US4361392A (en) * 1981-06-22 1982-11-30 Eastman Kodak Company Image-transfer method and apparatus
US4721974A (en) * 1987-03-17 1988-01-26 Polaroid Corporation Film processing kit

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1891722A (en) * 1931-09-22 1932-12-20 Bruning Charles Co Inc Sensitized paper developing apparatus
US2289798A (en) * 1940-02-08 1942-07-14 Eastman Kodak Co Coating apparatus
US2472596A (en) * 1946-05-17 1949-06-07 Eastman Kodak Co Removal of excess liquid from wet film
US2861885A (en) * 1954-11-04 1958-11-25 Polaroid Corp Photographic processes and products
US2887029A (en) * 1954-04-07 1959-05-19 Engelhard Ind Ltd Developer feed tank apparatus
US3107596A (en) * 1960-04-07 1963-10-22 Peerless Photo Products Inc Photocopy machine
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
US3143056A (en) * 1960-01-28 1964-08-04 Lumoprint Zindler Kg Apparatus for diffusion developing
US3195430A (en) * 1960-12-28 1965-07-20 Radio Corp Of American Electrostatic printing apparatus
US3282192A (en) * 1966-11-01 Photographic processing apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3282192A (en) * 1966-11-01 Photographic processing apparatus
US1891722A (en) * 1931-09-22 1932-12-20 Bruning Charles Co Inc Sensitized paper developing apparatus
US2289798A (en) * 1940-02-08 1942-07-14 Eastman Kodak Co Coating apparatus
US2472596A (en) * 1946-05-17 1949-06-07 Eastman Kodak Co Removal of excess liquid from wet film
US2887029A (en) * 1954-04-07 1959-05-19 Engelhard Ind Ltd Developer feed tank apparatus
US2861885A (en) * 1954-11-04 1958-11-25 Polaroid Corp Photographic processes and products
US3143056A (en) * 1960-01-28 1964-08-04 Lumoprint Zindler Kg Apparatus for diffusion developing
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
US3107596A (en) * 1960-04-07 1963-10-22 Peerless Photo Products Inc Photocopy machine
US3195430A (en) * 1960-12-28 1965-07-20 Radio Corp Of American Electrostatic printing apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472590A (en) * 1966-10-17 1969-10-14 Itek Corp Photocopy apparatus
US3424074A (en) * 1966-11-02 1969-01-28 Polaroid Corp Sealing means for photographic processing apparatus
US3593642A (en) * 1967-05-16 1971-07-20 Ciba Ltd Strip handling apparatus
JPS4828443U (xx) * 1971-08-11 1973-04-07
JPS5350439Y2 (xx) * 1971-08-11 1978-12-02
US4298267A (en) * 1980-06-24 1981-11-03 Polaroid Corporation Processing roller cleaner
US4361392A (en) * 1981-06-22 1982-11-30 Eastman Kodak Company Image-transfer method and apparatus
US4721974A (en) * 1987-03-17 1988-01-26 Polaroid Corporation Film processing kit

Also Published As

Publication number Publication date
AT285323B (de) 1970-10-27
NL6606740A (xx) 1966-11-18
GB1121316A (en) 1968-07-24
DE1547996A1 (de) 1969-12-11
CH470005A (de) 1969-03-15
BE681087A (xx) 1966-11-16
SE339403B (xx) 1971-10-04

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