Using Silver Salt Sensitizer Patents (Class 430/236)
  • Patent number: 9713919
    Abstract: The invention pertains to a printing form precursor, a method of preparing a printing form from the precursor, and a process of preparing the precursor. The printing form precursor includes a photopolymerizable layer, an elastomeric layer having at least an elastomeric binder and particulate, and an actinic radiation opaque material on, adjacent, or disposed above the elastomeric layer opposite the photopolymerizable layer. The particulate is selected from specific material particles having an average diameter from 1 to 10 micron and a refractive index that is within 0.04 units of an index of refraction of the composition forming the elastomeric layer.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: July 25, 2017
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Robert M Blomquist, John Stephen Locke, Chi W Chiu
  • Patent number: 7534544
    Abstract: In a method of using a donor element in a radiation-induced thermal transfer process, an assemblage is provided that includes a donor element and a receiver element, wherein the donor element has a support layer and a transfer layer having one side adjacent the support layer and the other side adjacent the receiver element. After image-wise exposing the assemblage to radiation whereby a portion of the transfer layer is transferred to the receiver element, relative movement between the support layer and the receiver element is provided before separating the donor element from the receiver element. Advantages include improved edge straightness, image width predictability, improved thermal mass transfer, and improved color filters.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: May 19, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Frank S. Principe, Edmund Francis Schieffer, Jr., Ian Michael Garben, Paul Holt
  • Patent number: 6689533
    Abstract: A dye-fixing element for color diffusion transfer process, having an ultraviolet-absorbing layer that contains an ultraviolet absorber in a coating amount of 0.2 g/m2 or more, over a mordant layer; and containing, as at least one dispersion medium for the ultraviolet absorber, a compound represented by formula (1), in a ratio (mass ratio) of 25 to 200% of the ultraviolet absorber; with the sum of coating amounts of the ultraviolet absorber and total dispersion medium for the ultraviolet absorber being 1.0 g/m2 or less; wherein x and y each represent a molar fraction of each recurring unit, the total of x and y is 1, and y ranges from 0.85 to 0.95.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: February 10, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Kiyoshi Irita
  • Publication number: 20030194637
    Abstract: A dye-fixing element for color diffusion transfer process, having an ultraviolet-absorbing layer that contains an ultraviolet absorber in a coating amount of 0.2 g/m2 or more, over a mordant layer; and containing, as at least one dispersion medium for the ultraviolet absorber, a compound represented by formula (1), in a ratio (mass ratio) of 25 to 200% of the ultraviolet absorber; with the sum of coating amounts of the ultraviolet absorber and total dispersion medium for the ultraviolet absorber being 1.
    Type: Application
    Filed: October 31, 2002
    Publication date: October 16, 2003
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventor: Kiyoshi Irita
  • Patent number: 6355393
    Abstract: There is disclosed an image-forming method, which comprises: subjecting a color light-sensitive material to exposure, by using, at least, a first, second, and third light-emitting element whose peak wavelength of the light-emission spectrum is in a first wavelength region of 380 to 500 nm, a second wavelength region of 500 to 600 nm, and a third wavelength region of 600 to 740 nm, respectively, and subjecting the exposed color light-sensitive material to development processing, wherein the color light-sensitive material has, at least, spectral sensitivities in the from first to third wavelength regions. There is also disclosed organic light-emitting elements for use as light sources for exposure in the method. According to the method, digital color images exhibiting good color reproduction can be obtained by exposing a light-sensitive material according to image information and carrying out development processing.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: March 12, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroyuki Hirai, Yasushi Araki
  • Patent number: 5885765
    Abstract: A recording material for producing high contrast images comprising at least one thermosensitive element, comprising a layer comprising a substantially light-insensitive organic silver salt in at least one binder and in thermal working relationship therewith an organic reducing agent therefor, on a support, characterized in that the recording material is light-insensitive and the layer contains colloidal particles comprising silicon dioxide at a coating weight given by expression (1): ##EQU1## wherein B represents the total weight of all binders in the layer, AGOS represents the total weight of organic silver salt in the layer and S represents the weight of the colloidal particles in the layer; and wherein a protective layer is optionally applied to the thermosensitive element being thereby an outermost layer of the recording material.
    Type: Grant
    Filed: December 26, 1996
    Date of Patent: March 23, 1999
    Assignee: Agfa-Gevaert
    Inventors: Bartholomeus Horsten, Vankeerberghen An, Leenders Luc
  • Patent number: 5747219
    Abstract: There are described novel image-receiving elements for use in diffusion transfer photographic systems. The novel image-receiving elements include a layer capable of reducing the light-absorbing capacity of an optical filter agent. The layer comprises nonylphenoxypolyoxyethylene and polyoxyethylene stearate.Diffusion transfer photographic systems utilizing the novel image-receiving elements of the present invention exhibit substantial clearing of optical filter agents during about the first five minutes of photographic processing, enabling the viewing of the emerging image against a whiter, brighter background, and show substantially diminished haze in the film coatings.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: May 5, 1998
    Assignee: Polaroid Corporation
    Inventors: Robert L. Febonio, James A. Foley
  • Patent number: 5593809
    Abstract: There are described a diffusion transfer photographic film unit of the type wherein an image-receiving element is designed to be separated from a photosensitive element after photoexposure and processing and a photographic process which utilizes the film unit. The photographic film unit comprises a photosensitive element including a support carrying at least one silver halide emulsion, an image-receiving element comprising a support, an image-receiving layer and, optionally, an overcoat layer and/or a strip-coat layer. At least one of the image-receiving layer, overcoat layer or strip-coat layer includes a "crosslinkable material" which is crosslinked during processing. The film unit further includes means for providing an aqueous alkaline processing composition to the photosensitive element and the image-receiving element for developing an image. The aqueous alkaline processing composition includes a borate compound for crosslinking the crosslinkable material of the image-receiving element during processing.
    Type: Grant
    Filed: December 7, 1995
    Date of Patent: January 14, 1997
    Assignee: Polaroid Corporation
    Inventors: Gia Y. Kim, Lloyd D. Taylor, Kenneth C. Waterman
  • Patent number: 5447818
    Abstract: A color diffusion transfer film unit and an image formation method using the same are disclosed, in which a light-sensitive material containing a specific sulfonamide compound of formula (I) and a specific tertiary amine compound of formula (II) is processed with an alkali processing composition containing a specific tertiary amine polymer. The film provides a transferred color image having a high density with reduced dependency on processing time, and suppresses changes in density of the resulting image with time after processing.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: September 5, 1995
    Assignee: Fuji Photo Film Co, Ltd.
    Inventors: Hideaki Naruse, Hideki Naito, Jiro Tsukahara, Tomokazu Yasuda
  • Patent number: 5447811
    Abstract: A system and method of image reproduction in color with preferential tone mapping are provided in which the method includes the steps of capturing original scene parameters and creating a visual reproduction of the scene, the method additionally comprising:performing a transformation of said captured scene parameters, said transformation being such that, taken in conjunction with untransformed characteristics of the capturing and creating steps, it results in a reproduced tone mapping having instantaneous gamma values of viewed reproduction density relative to density of the original scene which are greater than a minimum value of A and less than A plus 0.35 times scene exposure density over a scene exposure density range of from 0.60 to 1.45 as measured relative to a zero density, 100% diffuse reflector in the original scene, the instantaneous gamma values within scene exposure density range further lying entirely within a range of values subtended by an angle of 14.degree.
    Type: Grant
    Filed: March 23, 1994
    Date of Patent: September 5, 1995
    Assignee: Eastman Kodak Company
    Inventors: John D. Buhr, Harry D. Franchino
  • Patent number: 5264322
    Abstract: Xanthene derivatives having cations of the formula: ##STR1## in which X is an --SO.sub.2 --N(R.sup.6)--COR.sup.7 or --SO.sub.2 --N(R.sup.6 --CO.sub.2 (CH.sub.2).sub.2 Y grouping, wherein R.sup.6 is an alkyl group containing not more than about 6 carbon atoms, R.sup.7 is an alkyl or aryl group containing not more than about 10 carbon atoms and Y is an electron-withdrawing group; Z is a hydrogen atom or an --SO.sub.2 --N(R.sup.1)--R.sup.2 --NR.sup.3 R.sup.4 R.sup.5 grouping; R.sup.1 is hydrogen or an alkyl group containing not more than about 6 carbon atoms; R.sup.2 is an alkylene group containing from 2 to about 10 carbon atoms; R.sup.3 and R.sup.4 are each independently an alkyl group containing not more than about 6 carbon atoms, and R.sup.5 is a hydrogen atom or an alkyl group containing not more than about 6 carbon atoms, are useful as light-screening dyes in photographic products and processes.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: November 23, 1993
    Assignee: Polaroid Corporation
    Inventors: Paul R. Carlier, Michael P. Filosa, Mary P. Lockshin
  • Patent number: 5244771
    Abstract: A novel class of bridged indicator dyes is disclosed which possess absorption in the infrared region of the electromagnetic spectrum. These bridged indicator dyes are useful as light-absorbing, pH-sensitive optical filter agents in diffusion transfer photographic processes adapted to be performed in the presence of ambient light and to diffusion transfer products useful in such processes. These indicator dyes will also find utility in titrations and other analytical techniques and products where pH-sensitive indicator dyes are employed and absorption of infrared is useful.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: September 14, 1993
    Assignee: Polaroid Corporation
    Inventors: Charles E. Jandrue, Sr., Marcis M. Kampe, Myron S. Simon, David P. Waller, David C. Whritenour
  • Patent number: 5122433
    Abstract: An image recording method, where the image is transferred by superposing an exposed light-sensitive material and an image receiving material on the surface of a drum.Before superposing, in circumferential direction with respect to the axial direction of the drum reduced or magnified image is exposed onto the light-sensitive material.When a reduced image has been exposed, the exposed light-sensitive material will be positioned between the image receiving material and the surface of the drum. When a magnified image has been exposed, the image receiving material will be positioned between the exposed light-sensitive material and the surface of the drum. In this way an image without distortions will be transferred.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: June 16, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Hitoshi Kawaguchi
  • Patent number: 5059499
    Abstract: A hologram is directly recorded in a sensitized metal substrate. The hologram may be an amplitude hologram, or may be treated to produce a phase relief hologram which may be stamped into a plastic material for reproduction, be archivally stored, or used as a master for electroforming a second durable surface relief hologram for use as an embossing master. A suitable material is prepared from a polished silver plate exposed to halogen vapors. After exposure, the plate is developed and fixed, and the surface is differentially etched to form a surface relief suitable for hologram embossing. Daguerreotype processes are modified to make surface amplitude holograms and phase holograms. By etching through a metal film a semiconductor mask is obtained. By depositing a silver film directly on a wafer, masks are made with very high feature definition.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: October 22, 1991
    Inventor: Michael Teitel
  • Patent number: 4891298
    Abstract: This invention relates to diffusion transfer photographic processes adapted to be performed in the presence of ambient light and to diffusion transfer products useful in such processes wherein a substantial increase in opacification in the red and near infrared region of the visible spectrum and a substantial increase in opacification in the blue and green region is achieved by employing certain alkyl-substituted phenanthrol/carboxynaphthol phthaleins as the light-absorbing, pH-sensitive optical filter agent for the longer wavelength region of the visible spectrum.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: January 2, 1990
    Assignee: Polaroid Corporation
    Inventor: David P. Waller
  • Patent number: 4886733
    Abstract: This invention relates to diffusion transfer photographic processes adapted to be performed in the presence of ambient light and to diffusion transfer products useful in such processes wherein unexpectedly enhanced opacification in the red and near infrared region of the visible spectrum is achieved by employing phenanthrol/carboxynaphthol phthaleins as the light-absorbing, pH-sensitive optical filter agent for the longer wavelength region of the visible spectrum.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: December 12, 1989
    Assignee: Polaroid Corporation
    Inventor: Myron S. Simon
  • Patent number: 4877710
    Abstract: A method for forming an image comprising the steps of:(a) imagewise exposing a light-sensitive material comprising a support having thereon a light-sensitive layer containing an image-forming material encapsulated in microcapsules comprising a polymer;(b) superposing thereon an image-receiving material comprising a support having thereon an image-receiving layer in contact with the outermost layer of said light-sensitive material;(c) applying sufficient pressure to said superposed materials to imagewise rupture at least part of said microcapsules, to transfer an image from said light-sensitive layer to said image-receiving layer, and to adhere said light-sensitive material and said image-receiving material to form a unitary structure; at least one of said support for said light-sensitive material and said support for said image-receiving material being transparent.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: October 31, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Minoru Ishikawa
  • Patent number: 4839257
    Abstract: A color diffusion transfer photographic film unit and a method for forming image therewith which comprises a photosensitive sheet comprising a light-reflective support having disposed thereon in order outwardly from the support (a) a layer having neutralizing function, (b) a dye image-receiving layer, (c) a separating layer and (d) at least one light-sensitive emulsion layer comprising a light-sensitive silver halide, the light-sensitive emulsion layer being associated with at least one dye image-forming material; a transparent cover sheet superposed on the outermost layer of the photosensitive sheet; and rupturable storage means for providing a developing solution substantially opaque to light between the light-sensitive emulsion layer and the transparent cover sheet; provided that at least one of the light-reflective support and layer thereon disposed on the side of the light-sensitive emulsion layer opposite the transparent cover sheet is substantially opaque to light.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: June 13, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shigeru Nakamura, Minoru Minoda, Keisuke Shiba
  • Patent number: 4810602
    Abstract: Method and apparatus for improving the perceptibility of details on a hard-copy of a color image and for matching the color of a displayed image and a color hard-copy of the same image. In addition to the recording of the color information, at least one white light exposure modulated by the information of at least one color separation record is performed.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: March 7, 1989
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Guido R. Wittocx, Emile P. Schoeters
  • Patent number: 4810603
    Abstract: The tonality of a produced color image transferred to an image receiving material is measured. The differences between equivalent neutral shades of a reference color image and equivalent neutral shades of the reproduced color image are compared to calculate tonal correction values for corrected equivalent neutral shades. Tonality correction means is controlled on the basis of said tonal correction values.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: March 7, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yoshiharu Okino
  • Patent number: 4808509
    Abstract: Method of making a personal identification document exhibiting textual data and a portrait of the person, characterized in that it comprises the steps of forming a monochrome photographic textual image in a monochrome photographic silver halide material, forming a color photographic portrait image in a color photographic silver halide material, producing from these images corresponding monochrome and colored diffusion transfer images in image-receiving layers on opposite sides of a common receptor sheet, said receptor sheet, which bears the resulting diffusion transfer images, constituting a said personal identification document. The invention also provides a receptor sheet for use in such method.
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: February 28, 1989
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Ludovicus H. Vervloet, Willy P. De Smedt, Leon L. Vermeulen
  • Patent number: 4783392
    Abstract: A method for forming an image is described, comprising developing a photosensitive element which comprises a support provided thereon a photosensitive layer containing at least a photosensitive silver halide, a binder, and a dye providing substance which forms or releases a diffusible dye by developing after or simultaneously with imagewise exposure thereof, transferring the thus-formed or released diffusible dye to a dye fixing layer of a dye fixing element, and thereafter separating said photosensitive element and said dye fixing element from each other, wherein at least one layer constituting said photosensitive element and said dye fixing element contains an oil component.
    Type: Grant
    Filed: April 17, 1987
    Date of Patent: November 8, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiaki Aono, Takeshi Shibata, Yasuo Aotsuka, Kazuma Takeno, Masakazu Yoneyama
  • Patent number: 4775614
    Abstract: An ecologically advantageous method for fixing a developed photographic silver halide emulsion layer material which involves the steps of:(A) developing an image-wise exposed silver halide emulsion layer with a developing agent in the presence of an aqueous alkaline liquid,(B) bringing the developed photographic material while still wet with the liquid of step (A) with its silver halide emulsion layer side in intimate contact with a water-absorbing layer of a receptor element, which layer comprises an organic hydrophilic colloid binder, a silver halide complexing agent, and in dispersed form a metal sulphide as silver ion scavenging agent,(C) maintaining said photographic material and receptor element in contact to allow the transfer of dissolved complexed silver compound into said receptor element, and(D) separating the photographic material from the receptor element, andwherein said water-absorbing layer contains said metal sulphide in colloidal form with an average grain size below 0.1 .mu.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: October 4, 1988
    Assignee: Agfa-Gevaert N.V.
    Inventor: Gino L. De Rycke
  • Patent number: 4746592
    Abstract: Color correction of negative images resulting from diffusion transfer photographic recording materials is obtained through use of two dye image-providing compounds, each of which is capable of releasing a diffusible dye. One of the dye image-providing compounds releases a diffusible dye as a result of silver halide development whereas the other compound releases dye in areas where no development occurs.
    Type: Grant
    Filed: August 27, 1986
    Date of Patent: May 24, 1988
    Assignee: Eastman Kodak Company
    Inventor: Kin K. Lum
  • Patent number: 4734353
    Abstract: A method for processing a silver halide photographic light-sensitive material comprising a support having thereon a light-sensitive silver halide emulsion layer having associated therewith a blocked photographic agent capable of releasing a photographically useful agent, which method comprises processing the photographic light-sensitive material in the presence of an oxime.According to this method for processing a silver halide photographic light-sensitive material, both stability of the photographic light-sensitive material during storage and release of a photographically useful agent during processing are achieved without undersirable side-reactions, and a high sensitivity/fog ratio is obtained.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: March 29, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsunori Ono, Isamu Itoh, Keiji Mihayashi
  • Patent number: 4710444
    Abstract: Process for forming a halftone multicolor pattern which comprises in sequence given the following steps:(1) scanningwise exposing a multicolor original attached to a rotating scanner drum to produce series of electrical signals that are fed into a computer,(2) exposing in a single scan separate black-and-white light-sensitive silver halide emulsion layer materials under the control of the computer in accordance with said signals,(3) developing the exposed silver halide emulsion layers with a hardening or tanning developing agent producing a negative or positive silver selection image that can be used as intermediate original in the production of a printing plate, a pattern of oxidized hardening developing agent being imagewise transferred during development from the emulsion layer onto a hardenable non-photosensitive colored gelatin layer originally carried on a temporary support or carried directly on a permanent support,(4) producing a colored relief image by wash-off processing of said colored gelating lay
    Type: Grant
    Filed: January 30, 1986
    Date of Patent: December 1, 1987
    Assignee: AGFA-Gevaert N.V.
    Inventors: Luc H. Leenders, Eddie R. Daems, Jan A. Van den Bogaert
  • Patent number: 4695526
    Abstract: High molecular weight polymeric poly(ethylene oxide) compounds are employed as stripping agents for separating layers of photographic products.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: September 22, 1987
    Assignee: Eastman Kodak Company
    Inventor: John F. Bishop
  • Patent number: 4690884
    Abstract: A scavenger-spreader element adapted for use with a photosensitive element to form a negative image is disclosed as well as methods for processing said photosensitive element to produce the negative image. The scavenger-spreader element comprises a support carrying a hydrophilic layer, a cross-linking agent for the polymeric thickener of the photographic processing composition, a barrier layer to control diffusion of said cross-linking agent and a layer adapted to possess substantial adhesion for the cross-linked polymeric thickening agent.
    Type: Grant
    Filed: February 11, 1986
    Date of Patent: September 1, 1987
    Assignee: Polaroid Corporation
    Inventors: Frank E. DeBruyn, Jr., Lucretia J. Weed
  • Patent number: 4677046
    Abstract: An instant photographic method uses a photosensitive member in the form of a roll, of a length to receive a plurality of exposures, and an image-receiving member in the form of either a roll or a sheet. The photosensitive member is cut off to the length of a single frame of film after the exposure of its leading end. Before or after cutting off the member or members, the exposed leading end of the photosensitive member and the image-receiving member are superposed. Between the superposed members a processing liquid is distributed and spread in a uniform layer for diffusion transfer processing. During the processing, negative and positive images are produced simultaneously on the photosensitive and image-receiving members, respectively, according to the latent image previously created on the photosensitive member by exposure.
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: June 30, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yuji Oshikoshi, Masashi Katoh, Hisashi Kikuchi
  • Patent number: 4619889
    Abstract: An image forming method which comprises copying an original on a photosensitive material employing a direct reversal photographic emulsion is disclosed. The method comprises conducting ordinary exposure when the original image is a positive image and conducting exposure at high illuminance when the original image is a negative image. Thereby, it is possible to obtain a direct positive image from either the original positive or original negative image. The process is greatly advantageous with respect to forming positive images since the process can be utilized to obtain positive images regardless whether the original image is positive or negative.
    Type: Grant
    Filed: January 24, 1984
    Date of Patent: October 28, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideo Yuyama, Motohiko Tsubota
  • Patent number: 4615966
    Abstract: This invention relates to diffusion transfer photographic processes adapted to be performed in the presence of ambient light and to diffusion transfer products useful in such processes wherein enhanced opacification particularly, in the green region of the visible spectrum is achieved by employing a 7-sulfonamido/5- or 6-sulfamoyl indole phthalein as the light-absorbing, pH-sensitive optical filter agent for the shorter wavelength region of the visible spectrum.
    Type: Grant
    Filed: January 21, 1986
    Date of Patent: October 7, 1986
    Assignee: Polaroid Corporation
    Inventors: Alan L. Borror, Efthimios Chinoporos, Cheryl P. Petersen
  • Patent number: 4575482
    Abstract: Photographic materials which comprise, on a base, at least one layer containing an azo dyestuff of the formula ##STR1## in which R.sub.1 is hydrogen, an alkylsulfone, halogen, cyano or nitro, R.sub.2 is hydrogen, halogen, cyano or nitro, R.sub.3 is hydrogen, alkyl, halogen, cyano or nitro, B.sub.1 is an aromatic ring system, K.sub.1 is an aromatic amine and m.sub.1 is 1 or 2.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: March 11, 1986
    Assignee: Ciba-Geigy AG
    Inventor: John Lenoir
  • Patent number: 4548887
    Abstract: Colored dye diffusion images are produced using a recording material containing, on a layer support (layer element 1), a first dye absorbent layer (layer element 2), a light-sensitive element containing silver halide emulsion layers and color-providing compounds (layer element 3) and optionally a second dye absorbent layer (layer element 4), in that order. An imagewise distribution of diffusible dyes is produced in the light-sensitive element in the course of development and transferred to the first dye absorbent layer.The light-sensitive element is then decomposed by a treatment which decomposes its layers, e.g. by means of a proteolytic enzyme, but leaves the first dye absorbent layer intact. The second dye absorbent layer optionally present, which has a lower mordanting capacity than the first dye absorbent layer and serves to prevent contamination of the developer bath with diffusible dyes, is also decomposed.
    Type: Grant
    Filed: July 3, 1984
    Date of Patent: October 22, 1985
    Assignee: AGFA-Gevaert A.G.
    Inventors: Gunter Helling, Wolfgang Himmelmann
  • Patent number: 4546062
    Abstract: Polymeric optical filter agents and products and processes using same are disclosed. The polymeric optical filter agents are pH-sensitive materials comprising a polymeric backbone having a plurality of pendant moieties of the formula (I). ##STR1## wherein X is ##STR2## and R is alkyl, aryl, alkaryl or aralkyl; A is hydrogen, alkyl or the radical ##STR3## where each of Y.sup.1, Y.sup.2 and Y.sup.3 is hydrogen or an electron-withdrawing group; and each Z.sup.1, Z.sup.2 and Z.sup.3 is hydrogen or an electron-withdrawing group; with the proviso that, when each of Z.sup.1, Z.sup.2 and Z.sup.3 is hydrogen, said A is a radical ##STR4## wherein at least one of said Y.sup.1, Y.sup.2 and Y.sup.3 groups comprises an electron-withdrawing group. These agents upon contact with alkali are converted from a substantially non-light absorbing form to a highly colored light-absorbing form useful in photographic products.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: October 8, 1985
    Assignee: Polaroid Corporation
    Inventors: Irena Y. Bronstein-Bonte, Edward P. Lindholm
  • Patent number: 4529683
    Abstract: Photographic assemblages and processes are described wherein a stripping layer is employed to enable an image-receiving layer to be separated from the rest of the assemblage after processing. Each side of the stripping layer has a hydrophilic layer immediately adjacent thereto, only one of which contains a surfactant-like material having a hydrocarbon fatty tail of at least eight carbon atoms which is remote from a polar group, the material being present in an amount sufficient to enable a clean separation between the image-receiving layer and the portion of the assemblage containing the silver halide emulsion layer.Transparencies or prints which are less bulky and free from surface defects at the stripping layer interface can thereby be obtained from integral assemblages.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: July 16, 1985
    Assignee: Eastman Kodak Company
    Inventor: John F. Bishop
  • Patent number: 4508809
    Abstract: In a process and an apparatus for the exposure and development of photographic images according to the dye diffusion process a monosheet material is used, the laminated structure of which is divided by a layer which is impermeable to light but permeable to moisture into a photosensitive side of the sheet for image-wise exposure and a non-photosensitive side for observation and supplying the activator or developer solution. The said monosheet material is exposed image-wise in the dark and the photosensitive side then sealed in a light and moisture proof manner in a development apparatus in which the non-photosensitive side of the monosheet lies open and is exposed to an activator in daylight so that the image formation takes place visibly. Once the image quality has been achieved the development is stopped by removing the activator and by subsequent rinsing. The monosheet is dried in a conventional manner but only on one side.
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: April 2, 1985
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Immo Boie, Hermann Luhrig, Guido Kovacic
  • Patent number: 4499164
    Abstract: An optical barrier layer for use in reflection type image carrying media of the type wherein a thin transparent image receiving layer includes an image which is viewed through one side of the image receiving layer with ambient light that is reflected from a light scattering layer located on the other side of the image-receiving layer. The optical barrier layer is a thin, transparent layer located between the image receiving layer and the light scattering layer and operates to minimize nonlinear density effects of multiple internal reflections.
    Type: Grant
    Filed: May 3, 1984
    Date of Patent: February 12, 1985
    Assignee: Polaroid Corporation
    Inventor: William T. Plummer
  • Patent number: 4499174
    Abstract: Photographic assemblages and processes are described wherein a stripping layer is employed to enable an image-receiving layer to be separated from the rest of the assemblage after processing. Each side of the stripping layer has a hydrophilic layer immediately adjacent thereto, only one of which contains particulate material substantially insensitive to light and in a volume percentage of about 5 to about 75 percent of the hydrophilic material-particulate material mixture, so that upon separation, substantially all of the stripping layer will remain with the portion of the assemblage having the hydrophilic layer containing the particulate material.Transparencies or prints which are less bulky can thereby be obtained from integral assemblages.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: February 12, 1985
    Assignee: Eastman Kodak Company
    Inventors: John F. Bishop, Thomas O. Braun
  • Patent number: 4485164
    Abstract: Photographic elements and assemblages are described employing positive-working redox dye-releasers, wherein the element contains an oxidant which is located between the support and the photosensitive portion thereof. The oxidant has an electrode potential of from about -200 mV up to about 1200 mV versus a saturated calomel electrode at a pH of about 5 to about 6. After processing, the oxidant reacts with the electron transfer agent to prevent it from reacting with the dye releaser which would otherwise cause further dye release. The reduced form of the oxidant is then substantially incapable of reducing the positive-working redox dye-releaser. D.sub.min stability is thereby improved.
    Type: Grant
    Filed: July 6, 1983
    Date of Patent: November 27, 1984
    Assignee: Eastman Kodak Company
    Inventors: Eugene A. Armour, Jal F. Munshi
  • Patent number: 4483916
    Abstract: Method of improving the color balance of a multicolor reversal image obtained in a photographic material itself or obtained by a diffusion transfer reversal process in an image receiving material is provided, wherein said method comprises, as illustrated in FIG. 3, the steps of:(1) providing a photographic silver halide material (4) capable of yielding in said material or in an image receiving layer a multicolor reversal image of average gradient of at least 1.8;(2) image-wise exposing said photographic material to or through a multi-color continuous tone original (2) while keeping in the optical path between the original and the photographic material a light-distribution means (3) dividing the light in line-like or dot-like portions over the exposed area of the photographic material,(3) developing and reversal-processing said photographic material, e.g. by dye diffusion transfer-processing, hereby producing a reversal image with average gradient of at most 1.50 and reduced color point spreading.
    Type: Grant
    Filed: February 2, 1983
    Date of Patent: November 20, 1984
    Assignee: Agfa-Gevaert, N.V.
    Inventor: Christiaan G. Thiers
  • Patent number: 4481277
    Abstract: This invention is concerned with producing color images of improved quality in photographic processes employing silver ion assisted cleavage reactions to provide a dye image by scavenging, i.e., rendering inert substantially all of the silver ion and/or soluble silver complex in the photographic system when image formation is substantially complete.
    Type: Grant
    Filed: February 2, 1983
    Date of Patent: November 6, 1984
    Assignee: Polaroid Corporation
    Inventor: William J. Pfingston
  • Patent number: 4480025
    Abstract: A bleach-fix sheet for use in color photographic processes comprises a support having thereon a bleach-fix layer and a water reservoir layer comprising a water-supplying polymer. In a preferred embodiment, the bleach-fix sheet is useful to bleach and fix a retained image in a color image diffusion transfer process.
    Type: Grant
    Filed: January 13, 1983
    Date of Patent: October 30, 1984
    Assignee: Eastman Kodak Company
    Inventors: Hao J. Chang, Gerhard Popp, Patrick H. Saturno
  • Patent number: 4459346
    Abstract: Photographic assemblages and processes are described wherein a certain stripping agent is employed to enable an image-receiving layer to be separated from the rest of the assemblage after processing. The stripping agent comprises a straight chain alkyl or polyethylene oxide perfluoroalkylated ester or perfluoroalkylated ether, and preferably has the following formula: ##STR1## wherein R.sup.1 is an alkyl or substituted alkyl group having from 1 to about 6 carbon atoms or an aryl or substituted aryl group having from about 6 to about 10 carbon atoms; ##STR2## R.sup.3 is H or R.sup.1 ; n is an integer of from about 4 to about 20; andx and y each independently represents an integer of from about 2 to about 50, andz represents an integer of from 1 to about 50.Less bulky black-and-white or color prints or transparencies can thereby be obtained from integral assemblages. Materials from the discarded layers may also be recycled.
    Type: Grant
    Filed: March 25, 1983
    Date of Patent: July 10, 1984
    Assignee: Eastman Kodak Company
    Inventors: John F. Bishop, William J. Hutchinson, Michael W. Orem
  • Patent number: 4458002
    Abstract: A process for the production of a multicolor reversal image with improved color balance is provided which process comprises the steps of directing incident image light dot- or linewise modulated by a light-distributing means onto a multicolor photographic silver halide emulsion material containing a blue-, a green- and a red-sensitive silver halide emulsion layer and processing said silver halide emulsion layers to form a color reversal image.In the maximum density part of the dots or lines of said light distributing means e.g. a contact screen the ratio of the absorption density for the light corresponding with the spectral sensitivity region of the silver halide emulsion layer being during the exposure most remote from the light-distributing means to the absorption density for the light of the whole visible spectrum (400-700 nm) is higher than the said ratio in any other density part of the dots or lines (see FIG. 1).
    Type: Grant
    Filed: May 17, 1983
    Date of Patent: July 3, 1984
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Wilhelmus Janssens, Christiaan G. Thiers, Wilfried F. Liekens
  • Patent number: 4456674
    Abstract: This invention relates to diffusion transfer processes and products wherein the transmission density of the pigmented processing composition layer is increased by employing an alkali earth metal salt to increase the light-absorbing ability of a carboxynaphthol phthalein optical filter agent within said processing composition layer. In another embodiment, a carboxyindole phthalein optical filter agent also is included in said processing composition layer, and a zinc or cadmium salt is employed to shift the spectral absorption of the carboxyindole phthalein into the green region of the visible spectrum. In a further embodiment, a calcium salt is employed in a viscous pigmented processing compositon comprising a light-reflecting pigment, colloidal silica and a metal chelating agent, e.g., an alkylene polyamine polyacetic acid to stabilize the spreading characteristics of the compositions.
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: June 26, 1984
    Assignee: Polaroid Corporation
    Inventors: Leon D. Cerankowski, Gary S. LaPointe, Neil C. Mattucci
  • Patent number: 4450222
    Abstract: Image transfer photographic elements, assemblages, processes and compositions are described which employ carbon black in an opaque layer and/or alkaline processing composition, the carbon black having a deactivating compound adsorbed thereto so that dye image-providing material can diffuse through the opaque layer and/or processing composition without any substantial adsorption thereof to the carbon black, the deactivating compound being incapable of releasing any dye moiety therefrom.In a preferred embodiment, the deactivating compound has the following formula: ##STR1## wherein: (a) Ballast is an organic ballasting radical;(b) Z is ##STR2## or is part of Y; (c) G is OR.sup.1 or NHR.sup.2 wherein R.sup.1 is hydrogen or a hydrolyzable moiety and R.sup.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: May 22, 1984
    Assignee: Eastman Kodak Company
    Inventors: Kenneth C. Mattes, Harold C. Warren
  • Patent number: 4425421
    Abstract: A process for the production of a sealed laminate especially a security document comprising a support sheet, an image layer containing a photographic image present in a hardened hydrophilic diffusion transfer reversal image-receiving colloid medium made from an image receiving layer containing photosensitive iron(III) compound, and a protective cover sheet is described wherein:(1) the support sheet is of a polymeric heat meltable material,(2) the image layer is disposed adherently on the support sheet to cover the support area only partly and to leave uncovered at least one edge area thereof,(3) the protective sheet is of a heat-meltable material which in the melted state is capable of forming a homogeneous mass with melted support sheet material, and(4) the protective cover sheet is heat sealed to the support sheet in the uncovered areas thereof to form the homogeneous mass, whereby said image layer is sealed between the support sheet and the protective sheet.
    Type: Grant
    Filed: September 22, 1982
    Date of Patent: January 10, 1984
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Antonius A. Rutges, Ludovicus M. Mertens, Maurits W. Van Grasdorff
  • Patent number: 4416971
    Abstract: In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein each R.sup.1 is the same and is selected from ##STR2## R.sup.2 is alkyl, R.sup.3 is an electron-withdrawing group positioned ortho, meta or para to said N atom, R.sup.4 is hydrogen, alkyl or an electron-withdrawing group positioned ortho, meta or para to said N atom; R.sup.5 is alkyl; X is hydrogen, an electron-withdrawing group or an electron-donating group; and A is an anion. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds, e.g., as photographic light-screening dyes.
    Type: Grant
    Filed: December 28, 1982
    Date of Patent: November 22, 1983
    Assignee: Polaroid Corporation
    Inventors: Alan L. Borror, Louis Cincotta, John W. Lee, Jr.
  • Patent number: 4416970
    Abstract: Image transfer photographic assemblages, processes, compositions and cover sheets are described which employ a manganous compound. After processing, the manganous compound is capable of diffusing to the silver halide emulsion layer and a redox dye-releaser associated therewith to inhibit further dye release. Post-process D.sub.min stability is thereby improved.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: November 22, 1983
    Assignee: Eastman Kodak Company
    Inventor: Thomas O. Maier
  • Patent number: 4413050
    Abstract: A photographic process, and the product therefrom, comprising over-exposing color positive transparency film in a camera while focused upon an object to produce a latent image of the object upon the film and then developing the latent image upon the film by emersion in appropriate film development materials sequentially, with the emersion time in the first developer substantially reduced from normal to produce a low contrast actual image on the film; and thereafter, projecting and exposing the actual image on the transparency film onto an instant print film which is being maintained at a temperature at least as high as normal ambient exposure temperature prescribed for the instant print film; and then developing the instant print film according to the prescribed procedure at a temperature at least as high as normal ambient development temperature prescribed for the instant print film.
    Type: Grant
    Filed: May 7, 1981
    Date of Patent: November 1, 1983
    Inventor: W. Gregory Erf