US3253916A - Photographic product and process - Google Patents

Photographic product and process Download PDF

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Publication number
US3253916A
US3253916A US223011A US22301162A US3253916A US 3253916 A US3253916 A US 3253916A US 223011 A US223011 A US 223011A US 22301162 A US22301162 A US 22301162A US 3253916 A US3253916 A US 3253916A
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United States
Prior art keywords
sheet
image
liquid
retaining
mentioned
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Expired - Lifetime
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US223011A
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English (en)
Inventor
Arthur J Sable
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Polaroid Corp
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Polaroid Corp
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Filing date
Publication date
Priority to BE637322D priority Critical patent/BE637322A/xx
Priority to NL126855D priority patent/NL126855C/xx
Priority to NL297266D priority patent/NL297266A/xx
Application filed by Polaroid Corp filed Critical Polaroid Corp
Priority to US223011A priority patent/US3253916A/en
Priority to GB33323/63A priority patent/GB1024344A/en
Priority to FR947221A priority patent/FR1374561A/fr
Priority to DEJ24407A priority patent/DE1172954B/de
Application granted granted Critical
Publication of US3253916A publication Critical patent/US3253916A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D9/00—Diffusion development apparatus
    • 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
    • G03B17/28—Locating light-sensitive material within camera
    • G03B17/32—Locating plates or cut films
    • G03B17/34—Changing plates or cut films
    • 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
    • G03B17/52—Details of cameras or camera bodies; Accessories therefor adapted for combination with other photographic or optical apparatus with both developing and finishing apparatus of the Land type
    • 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

  • MyM BYWAZQW AT ORNEYS United States Patent This invention relates to photographic products and processes and more particularly to processes for producing photographic prints and products useful therein.
  • Diffusion-transfer reversal processes in which a liquid processing composition is distributed between and in contact with an exposed layer of a photosensitive imagerecording material and another layer superposed therewith and reacted with the image-recording material to produce a positive transfer print supported on the other layer are well known in the art.
  • each sheet, when exposed and treated with a liquid would constitute a photographic print and, with the exception of the liquid, provide all of the materials required to produce a print.
  • the sheet would be coiled and a liquid composition distributed between opposite sides of successive convolutions of the coiled sheet by advancing the sheet between a pair of juxtaposed pressure-applying members one of which functions as a support around which the coil is formed.
  • Each succeeding convolution of the coil is brought into superposition with the previous convolution at the bite, i.e., between the jaxtaposed members, where a mass of the liquid is provided for distribution between adjacent surfaces of the sheet as successive portions of the sheet surfaces are brought into superposition at the bite of the members.
  • an undistributed mass of the liquid still remains between the sheets at the bite of the juxtaposed pressure-applying members.
  • the problem is to collect, retain and dispose of this (now) excess liquid so as to prevent the liquid from being distributed beyond the trailing end of the sheet into contact with one of the pressure-applying members and/ or the outer surfaces of the outer (last) convolution of the coiled sheet.
  • An object of the invention is to provide a novel and improved photographic product useful in a method of photography as described and including means for collecting and retaining, for disposal, processing liquid in excess of that utilized to treat the image-recording material while facilitating disposal of this excess liquid.
  • the invention accordingly comprises the process iiivolving the several steps and the relation and order of.
  • FIGURE 1 is a somewhat schematic, sectional view illustrating the method of the invention and a photographic product useful therein;
  • FIG. 2 is a View similar to FIGURE 1 illustrating another step in the process.
  • FIG. 3 is a fragmentary view similar to FIG. 2 illustrating another step in the method. of the invention.
  • the present invention is concerned with. the production of positive photographic prints by a method which can be performed easily and rapidly with a minimum of simple, inexpensive apparatus and utilizes materials in themselves inexpensive. It is in the furtherance of thes aims that it has been proposed to produce the positive image comprising a print by a diffusion-transfer reversal process on the opposite side of the sheet carrying the photosensitive image-recording material from which the positive transfer image is formed.
  • the invention finds special utility and advantage in document copying where it is desirable to produce a positive copy of a document inexpensively on a sheet of paper similar in size and shape (usually rectangular) to the original document; and wherein anegative image on the reverse side of the copy from the positive is not considered particularly objectionable although, if desired, provision can be made for stripping the negative image from the support which carries the positive print.
  • the single sheet supporting the image-recording material following exposure of the latter is coiled upon itself with the image-recording material innermost so that the exposed area of the image-recording material is superposed with another area of the opposite surface of the support sheet.
  • the support sheet is usually coiled around a cylindrical supporting member while the liquid is distributed between and in contact with the outer surface of one convolution and the inner surface (image-recording material) of the next convolution.
  • the processing liquid is initially provided. on the sheet as .an elongated mass located adjacent the leading end of a surface of a portion of the sheet to be treated and is distributed between convolutions of the sheet by the progressive application of compressive pressure to portions of the sheet succeeding from its leading end. A compression.
  • the sheet is provided in juxtaposition with the cylindrical supporting member for superposing successive convolutions of the sheet and distributing the processing liquid therebetween during movement of the sheet into the coil between the supporting and compression members.
  • the sheet is permitted to remain in a coiled condition for a predetermined period during which the liquid is reacted with the image-recording material to produce a positive diffusion-transfer reversal image on the side of the sheet opposite the image-recording material.
  • the sheet is uncoiled toreveal-a positive image on one side and a negative image on the other side, the latter of course being displaced toward the trailing end of the sheet from the positive image by a. distance at least equal to the length of the first convolution.
  • This portion of the sheet at the trailing end supporting only a negative image on one side may, if desired, be trimmed from the remainder of the sheet supporting the positive image and the major portion of the negative image.
  • FIGURE 1 of the drawing wherein there is illustrated a photographic product constructed according to the invention and useful in the method thereof together with the essential components of apparatus for performing this method.
  • the product comprises a first or support sheet 12 the thickness of which At the end of this:
  • Supporting sheet 12 may be formed of any of the usual film base materials used in photography; however, paper is preferred because of its low cost and particularly when the purpose for whichit is to be employed is the copying of documents.
  • Sheet 12 is generally rectangular in shape and, with the exception of its length about which more will be said later, may conform substantially to the standard size or sizes of paper generally used commercially, e.g., 8 /2 X 11 inches or 8% x 13 inches.
  • Sheet 12' is coated on one surface with a layer of a photosensitive image-recording material such as a gelatino silver halide emulsion.
  • This layer is approximately equal in size to the print which is to be made, i.e., the original document to be copied, and may include a leading edge spaced from the leading edge 14 of sheet 12 toward the trailing edge 16 of sheet 12.
  • the layer of photosensitive image-recording material may, if desired, completely cover one side of sheet 12; or, in another embodiment, the layer of photosensitive material may terminate, as suggested, a predetermine distance from the leading edge of the sheet.
  • the image-recording layer is photoexposed in a conventional manner to produce an image therein. Exposure may be accomplished by an image-forming optical system or, in the case of document copying, either by direct or reflex exposure in conjunction with the document being copied. Following exposure, sheet 12 is attached at its leading end to a cylindrical supporting member 18 which may be rotated in order to coil sheet 12 around the periphery of the supporting member.
  • the diameter of supporting member 18 is preferably as small as possible consistent with maintaining the requisite structural strength and rigidity inasmuch as the length of each convolution of the sheet, and particularly the first convolution which is essentially waste, is a function of the circumference of roll 18.
  • Various mechanisms may be employed for securing the leading end of sheet 12 to roll 18, a preferred mechanism being to provide a pressure-sensitive adhesive on the leading end portion of sheet 12 on the same surface thereof as the layer of image-recording material.
  • the leading end portion of the sheet and a section of the roll periphery may be provided with a contact adhesive having substantial sheer strength, yet relatively little strength in tension so that the sheet may be readily stripped from roll 18 when processing is complete.
  • Sheet 12 in the form shown in FIGURE 1, is coiled on roll 18 with the image-recording materialcontaining. the negative image facing inwardly, this arrangement being preferred over an arrangement in which the imagerecording material faces outwardly because it locates the waste material at one end of the sheet.
  • the processing liquid which is preferably quite viscous, is provided on sheet 12 on the same surface thereof as the imagerecording material.
  • the processing liquid is preferably dispensed from a tubular container 20, very much like a drinking straw, as an elongated uniformly distributed mass extending substantially from side to side of the sheet or at least the area thereof to be treated, and located toward the trailing end of the sheet from the leading end of the sheet by a distance approximating the circumference of roll 18, i.e., the length of the first convolution of the sheet.
  • the mass of liquid islocated on the sheet so as to become disposed between the outer surface of the coiled sheet at the leading end portion thereof and the inner surface of the coiled sheet at the leading edge of the area in which the positive transfer image is formed.
  • leading edge of the negative image is thus spaced from leading edge 14 of sheet 12 by a distance greater (by the width of the mass of liquid) than the circumference of roll 18, and a corresponding section at the opposite '(trailing) end of sheet 12 which may be considered to constitute waste material.
  • pressure member 22 is shown as a cylindrical roll, it may comprise any form of member providing a surface tangent with the surface of roll 18 along an axial line on that surface.
  • pressure member 22 may comprise a flat plate or bar which is either movable toward and away from roll 18, and is biased toward the roll.
  • Roll 18 and member 22 may comprise rigid materials such as metal or slightly pliant materials such as hard rubber and are designed to apply compressive pressure to the sheet progressively from its leading edge toward its trailing edge as the sheet is being coiled upon roll 18.
  • the invention contemplates the formation of a positive diffusion-transfer image on the opposite surface of sheet 12 from the exposed imagerecording material.
  • Processes of this type and materials useful therein are disclosed in US. Patent No. 2,662,822, issued December 15, 1953, in the name of Edwin H. Land.
  • Typical materials include silver halide as the image-recording material while the liquid processing composition comprises a silver halide developer, a silver halide solvent and an agent providing a silver precipitating environment for promoting the reduction of silver halide.
  • the image-recording material may be coated on one side of ordinary bond paper while the transfer image is produced on the opposite side of the paper which requires substantially no special preparation for this purpose.
  • exposed silver halide is devolped to produce a negative image while a soluble silver complex is formed from undeveloped silver halide and is diffused from the silver halide layer and reduced to form an image in silver which is the positive of the subject matter of the latent image in the silver halide.
  • the processing liquid may be distributed between opposite surfaces of sheet 12 as a thin layer in which the positive transfer image is formed. This layer is the result of the inclusion in the processing liquid of a thickening or film forming agent such as sodium carboxymethyl cellulose.
  • the processing liquid which is thickened to facilitate distribution is advanced between adjacent surfaces of the sheet primarily to effect the Wetting of one or both surfaces of the sheet which absorb reagents from the mass of viscous liquid as the latter is moved relative to and in contact with the sheet surfaces.
  • the viscosity providing agent being a film-forming material, tends to adhere to the sheets to form a layer which may be extremely thin; and this layer, however thin, is formed between the sheets and performs the function of retaining the convolutions of the sheets in superposition during the period required for formation of a transfer image.
  • the silver transfer image is precipitated in the pres nce of the aforementioned precipitating agent, e.g., solid minute particles of a substance insoluble in the liquid for accelerating the reduction by the developer of silver bearing ions in solution; and this silver precipitating agent becomes afiiliated with the surface of sheet 12 resulting in the formation of the transfer image thereon.
  • the aforementioned precipitating agent e.g., solid minute particles of a substance insoluble in the liquid for accelerating the reduction by the developer of silver bearing ions in solution.
  • Coiling of sheet 12 and distribution of the processing liquid, herein designated 24, is continued until the trailing edge of the exposed area of the image-recording layer has been advanced into superposition with the surface of the opposite side of sheet 12 to-form a coil such as is shown in FIGS. 2 and 3 in which the layer of photosensitive image-recording material and the layer of liquid, which may be extremely thin, are designated 26.
  • the layer of photosensitive image-recording material and the layer of liquid, which may be extremely thin are designated 26.
  • the means for collecting and retaining excess processing liquid comprises a trapping sheet 28 secured to the opposite side of sheet 12 from the image-recording material at the trailing edge of the area in which the transfer image is formed.
  • Trapping sheet 28 comprises a generally rectangular sheet of a material such as paper preferably equal in width to the width of sheet 12 and having a length substantially less than the length of sheet 12 and just suflicient to collect and retain the excess processing liquid.
  • Trapping sheet 28 is secured at its leading edge portion to sheet 12 by a strippable adhesive designated 30 so that at least the trailing edge portion of trapping sheet 28 is free for movement with respect to sheet 12.
  • Roll 18 is rotated to cause the leading edge of trapping sheet 28 to enter the bite between members 18 and 22 on two successive occasions.
  • trapping sheet 28 is located outermost and performs no function.
  • the trapping sheet is disposed between successive convolutions of sheet 12, and the pressure exerted by member 22 is relieved so as to provide a space between trapping sheet 28 and the trailing end portion, designated 32, of sheet 12 in which the mass of excess processing liquid is collected and retained.
  • Trailing end portion 32 is preferably coextensive with trapping sheet 28 and includes a leading edge spaced along sheet 12 from the leading edge of trapping sheet 28 by the length of the convolution of sheet 12 including the trapping sheet and the trailing end portion of the negative image, preferably so that trailing edge 16 of sheet 12 andthe trailing edge of trapping sheet 28 are aligned when sheet 12 is completely coiled upon itself around roll 18.
  • the invention provides for separating the portion of the product retaining the collected excess processing liquid from the portion of sheet 12 comprising the positive print.
  • sheet 12 is precut, perforated or otherwise weakened at the leading edge of trailing end portion 32 along a transverse line designated 34.
  • Sheet 12 is allowed to remain in a coiled condition during a predetermined imbibition period at the end of which the trailing end portion 32 and trapping sheet 28 are withdrawn from the coil, which is facilitated by the fact that there is no processing liquid between trapping sheet 28 and the outer surface of the preceding convolution of sheet 12.
  • sheet 12 functions to adhere trapping sheet 28 to trailing end portion 32, and this coupled with the fact that the trapping sheet and the trailing end portion are both grasped causes the trapping sheet to strip away from sheet 12 to which it had originally been adhered thereby leaving a single sheet containing the positive transfer image and constituting a photographic-transfer print.
  • the remainder of sheet 12 may then be uncoiled and, if desired, the trailing end portion of sheet 12 containing only a negative image on one side may be severed from the remainder of the sheet containing the positive image on the opposite side; and sheet 12 may be precut for this purpose so that separation of both the trapped liquid and the nega tive is performed in one operation.
  • the imagerecording material may be provided on the side of sheet 12 which faces outwardly whenthe sheet is coiled.
  • the negative image extends from adjacent the leading edge of sheet 12 and trapping sheet 28 is located with its leading edge adjacent the trailing edge of the exposed area.
  • the mass of liquid is deposited on the opposite side of the sheet from the negative image at a location spaced from the leading edge of sheet 12 approximately the length of a single convolution. Stated differently, the positions of the negative and positive images are reversed.
  • this embodiment is less preferred because it results in waste at both ends of sheet 12 rather than at only one end.
  • the photosensitive layer may be supported on a stripping layer in turn supported on sheet 12; and the positive print may be subjected to an after treatment, e.g., application of a solvent for the stripping layer, to remove the image-recording layer containing the developed negative image.
  • an after treatment e.g., application of a solvent for the stripping layer
  • the presence of a negative image of the document on the reverse side of the positive copy of the document should not prove unduly objectionable particularly if material comprising sheet 12 is sufliciently opaque so that the negative image is not seen through the side of the paper supporting the positive image.
  • the production of a positive photographic print is reduced to a simple, easily performed process requiring only a minimum of apparatus which need not be expensive or complex and utilizes simple and inexpensive materials.
  • the materials employed for each copy comprise a single sheet to which is attached a small sheet and a container of processing liquid.
  • the apparatus includes, in addition to means for exposing the photosensitive material, means (not shown) for ejecting the fluid contents of the container onto the sheet, means for rotating roll 18 and means (not shown) for relieving pressure exerted by member 22 against roll 18, the means not shown being well known to those skilled in the art.
  • a photographic product including a sheet designed to be treated with a liquid by coiling said sheet and distributing said liquid between and in contact with successive superposed convolutions of said coiled sheet, in combination:
  • a retaining sheet approximately equal in width to the first-mentioned sheet and having a length which is substantially less than the length of said first-mentioned sheet;
  • said retaining sheet being secured to said first-mentioned sheet at the leading edge portion of said retaining sheet with the trailing edge of said retaining sheet spaced from the trailing edge of said firstmentioned sheet by-at least the length of a single convolution of said first-mentioned sheet when the latter is coiled such that said trailing edge of said first-mentioned sheet extends to said trailing edgev of said retaining sheet when said sheets are coiled; said retaining sheet being removably secured to said first-mentioned sheet;
  • said first-mentioned sheet being precut along a transverse line substantially parallel with said trailing edge of said first-mentioned sheet and spaced therefrom by a distance substantially equal to the length of said retaining sheet in order to promote severance of the trailing end portion of said first-mentioned sheet from the remainder thereof.
  • a photographic product including a sheet designed to be treated with a liquid by coiling said sheet and distributing said liquid between and in contact with successive superposed convolutions of said coiled sheet, in combination:
  • a retaining sheet approximately equal in width to the first-mentioned sheet and having a length which is substantially less than the length of said first-mentioned sheet;
  • said retaining sheet being secured to the other side of said first-mentioned sheet at the leading edge portion of said retaining sheet with the trailing edge of said retaining sheet spaced from the trailing edge of said first-mentioned sheet by at least the length of a single convolution of said first-mentioned sheet when the latter is coiled such that said trailing edge of said first-mentioned sheet extends to said trailing edge of said retaining sheet when said sheets are coiled;
  • said retaining sheet being removably secured to said first-mentioned sheet
  • said first-mentioned sheet being precut along a transverse line substantially parallel with said trailing edge of said first-mentioned sheet and spaced therefrom by a distance substantially equal to the length of said retaining sheet in order to promote severance of the trailing end portion of said first-mentioned sheet from the remainder thereof.
  • a photographic product including a sheet designed to be treated with a liquid by coiling said sheet and distributing said liquid between and in contact with successive superposed convolutions of said coiled sheet, in combination:
  • a retaining sheet approximately equal in width to the first-mentioned sheet and having a length which is substantially less than the length of said first-mentioned sheet;
  • said retaining sheet being secured to said one side of said first-mentioned sheet at the leading edge portion of said retaining sheet with the trailing edge of said retaining sheet spaced from the trailing edge of said first-mentioned sheet by at least the length of a single convolution of said first-mentioned sheet when the latter is coiled such that said trailing edge of said firstmentioned sheet extends to said trailing edge of said retaining sheet when said sheets are coiled;
  • said retaining sheet being removably secured to said first-mentioned sheet
  • said firsta-mentioned sheet being precut along a transsupported on one side of said sheet and covering at least an exposure area extending substantially from side to side of said sheet and from a leading edge, spaced from the leading end of said sheet toward the trailing end of said sheet by slightly more than the length of a convolution thereof, 'when the latter is coiled, over a major portion thereof;
  • a generally rectangular trapping sheet at least equal in width to said exposure area and having a length which is substantially less than the length of said first-mentioned sheet;
  • said trapping sheet being secured to one side of said first-mentioned sheet with the leading edge of said trapping sheet spaced from the trailing edge of said exposure area and the trailing edge of said trapping sheet spaced from the trailing edge of said first-mentioned sheet, by said length of a single convolution of said first-mentioned sheet so that said trailing edges of said sheets are aligned when said first-mentioned sheet is completely coiled;
  • said trapping sheet being secured to said first-mentioned sheet at the leading edge portion of said trapping sheet by a strippable adhesive
  • said fi-rst mentioned sheet being precut along a transverse line substantially parallel with said trailing edge of said first-mentioned sheet and spaced therefrom by a distance substantially equal to the length of said trapping sheet in order to promote severance of the trailing end portion of said first-mentioned sheet from the remainder thereof.
  • a method of producing a positive photographic print comprising:
  • a method of producing a positive photographic print comprising:

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US223011A 1962-09-12 1962-09-12 Photographic product and process Expired - Lifetime US3253916A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE637322D BE637322A (enrdf_load_stackoverflow) 1962-09-12
NL126855D NL126855C (enrdf_load_stackoverflow) 1962-09-12
NL297266D NL297266A (enrdf_load_stackoverflow) 1962-09-12
US223011A US3253916A (en) 1962-09-12 1962-09-12 Photographic product and process
GB33323/63A GB1024344A (en) 1962-09-12 1963-08-22 A composite photographic sheet and method of processing it
FR947221A FR1374561A (fr) 1962-09-12 1963-09-11 Produit et procédé photographiques
DEJ24407A DE1172954B (de) 1962-09-12 1963-09-11 Photographisches Filmverbundmaterial und Verfahren zur Herstellung von Kopien hiermit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US223011A US3253916A (en) 1962-09-12 1962-09-12 Photographic product and process

Publications (1)

Publication Number Publication Date
US3253916A true US3253916A (en) 1966-05-31

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US223011A Expired - Lifetime US3253916A (en) 1962-09-12 1962-09-12 Photographic product and process

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US (1) US3253916A (enrdf_load_stackoverflow)
BE (1) BE637322A (enrdf_load_stackoverflow)
DE (1) DE1172954B (enrdf_load_stackoverflow)
GB (1) GB1024344A (enrdf_load_stackoverflow)
NL (2) NL297266A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD358309S (en) 1993-10-22 1995-05-16 Roe Ross E Sieving shovel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2088145A (en) * 1929-10-23 1937-07-27 Agfa Ansco Corp Light-sensitive material
US2686717A (en) * 1949-04-16 1954-08-17 Polaroid Corp Photographic product comprising a sheet support and means for collecting liquid spread upon said support in excess of that required to cover a predetermined area of the support
US2740717A (en) * 1952-05-03 1956-04-03 Eastman Kodak Co Photographic transfer process
US2882151A (en) * 1955-10-31 1959-04-14 Eastman Kodak Co Photographic roll film transfer process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2088145A (en) * 1929-10-23 1937-07-27 Agfa Ansco Corp Light-sensitive material
US2686717A (en) * 1949-04-16 1954-08-17 Polaroid Corp Photographic product comprising a sheet support and means for collecting liquid spread upon said support in excess of that required to cover a predetermined area of the support
US2740717A (en) * 1952-05-03 1956-04-03 Eastman Kodak Co Photographic transfer process
US2882151A (en) * 1955-10-31 1959-04-14 Eastman Kodak Co Photographic roll film transfer process

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Publication number Publication date
NL126855C (enrdf_load_stackoverflow)
DE1172954B (de) 1964-06-25
GB1024344A (en) 1966-03-30
BE637322A (enrdf_load_stackoverflow)
NL297266A (enrdf_load_stackoverflow)

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