Dry Or Concentrated Patents (Class 430/458)
-
Patent number: 5378588Abstract: There is disclosed a method for processing a silver halide photographic light sensitive material comprising the steps ofdeveloping the light sensitive material with a developing solution,treating the light sensitive material with a fixing capacity-having solution, and thentreating the light sensitive material with a processing solution (S), wherein part of or the whole of overflow from a tank containing the processing solution (S) is allowed to flow into a tank containing the fixing capability-having solution, and wherein solid processing chemicals are added to the fixing capacity-having solution or the overflow from the tank containing the processing solution (S).Type: GrantFiled: July 20, 1993Date of Patent: January 3, 1995Assignee: Konica CorporationInventor: Ichiro Tsuchiya
-
Patent number: 5366853Abstract: A tablet-shaped bleaching agent for preparing a bleaching solution for color silver halide photographic materials is disclosed, along with the method of making it, the method of using it to prepare a bleaching solution, and the method of processing a color silver halide photographic material using a replenishing solution made from the tablet as a bleaching solution. The tablet has a bulk density of 1.00 to 3.00 g/cm.sup.3, and a total ammonium content of no more that 50 mol % of the total cation content in the tablet. The tablet comprises a ferric complex salt of a compound represented by Formula (L) and an organic polyacid according to Formula (C). In Formula (L), A.sub.1-4 each represent --CH.sub.2 OH, --COOM, or --PO.sub.3 M.sub.1 M.sub.2, and X represents a substituted or unsubstituted alkylene group of 3-6 carbon atoms. In Formula (C), A.sub.5 represents an organic group, and n is an integer of not less than 2. ##STR1## Formula (C) A.sub.5 --(COOM).sub.Type: GrantFiled: November 9, 1993Date of Patent: November 22, 1994Assignee: Konica CorporationInventor: Hiroshi Yoshimoto
-
Patent number: 5358832Abstract: There is described a fixing bath for developed silver halide photographic material which comprises as the active silver halide solvent a combination of sodium thiosulphate and potassium thiosulphate, the molar ratio of sodium to potassium being from about 2:3 to about 3:2.Type: GrantFiled: October 18, 1993Date of Patent: October 25, 1994Assignee: Ilford LimitedInventors: Robert S. Millington, Ross Fielding
-
Patent number: 5334492Abstract: A method for processing photographic silver halide materials with aqueous processing baths which are replenishedduring processing, in which at least one chemical substance in the form of a plurality of solid bodies of geometrically defined shape and of the same size and composition is added to replenish at least one processing bath, is distinguished by a low consumption of chemicals and by a minimal accumulation of overflow for subsequent disposal.Type: GrantFiled: June 11, 1992Date of Patent: August 2, 1994Assignee: Agfa Gevaert AktiengesellschaftInventors: Ubbo Wernicke, Werner Went
-
Patent number: 5328814Abstract: A method for making flowable alkaline thiosulfate, flowable alkaline sulfite, or a combination of the two, by blending an alkaline thiosulfate, an alkaline sulfite, or a combination of the two, with an alkali metal arylsulfonate.formaldehyde in an amount effective to render the alkaline thiosulfate, the alkaline sulfite, or the combination freely flowable, and the product of this method. It has been found that the product of this method, such as freely flowable ammonium thiosulfate powder mixture, can be stored in a freely flowable condition for extended periods of time and can be dissolved into solution readily to form a clear non-turbid solution. The freely flowable ammonium thiosulfate powdered mixture of the present invention is particularly useful as a photographic fixative and bleach fixative for processing photographic elements.Type: GrantFiled: September 10, 1993Date of Patent: July 12, 1994Assignee: Fuji Hunt Photographic Chemicals, Inc.Inventors: Hongzoon Kim, Charles J. Pfeiffer
-
Patent number: 5310633Abstract: Disclosed is a powdery bleach-fixing composition which is substantially not caked during storage. The bleach-fixing composition for color photographic materials comprises a thiosulfate, an iron (III) complex compound or a salt thereof, and a sulfite, bisulfite or pyrosulfite, at least 50 molar % (in terms of sulfite ion equivalent) thereof being potassium salt.Type: GrantFiled: May 5, 1993Date of Patent: May 10, 1994Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazuaki Yoshida, Takatoshi Ishikawa
-
Patent number: 5298382Abstract: Photographic silver halide photosensitive material is processed, after exposure, by treating it with a working fixer solution. The photosensitive material comprises at least one layer of silver halide emulsion on a support and contains at least 10% by weight, based on gelatins, of a gelatin having an isoelectric point of at least 5.0 on the emulsion layer side. The working fixer solution is prepared by furnishing a fixer concentrate of at least pH 5 containing a thiosulfate as a fixing agent, 0.05-0.8 mol/liter of a sulfite and up to 0.01 mol/liter of a water-soluble aluminum salt, and diluting the fixer concentrate with water, thereby forming the working fixer solution containing a minimized amount of ammonium thiosulfate and 0.5-2.5 mol/liter of sodium thiosulfate. The method provides improved rapid processing with increased degrees of fixation and drying while preventing the generation of sulfurous acid and ammonia gases.Type: GrantFiled: February 25, 1993Date of Patent: March 29, 1994Assignee: Fuji Photo Film Co., Ltd.Inventors: Takashi Toyoda, Itsuo Fujiwara
-
Patent number: 5275923Abstract: A method of reducing the environmental impact of ammonium thiosulfate photographic fixers without increasing fixing time is provided. In the method of the invention, up to 60% molar of the total ammonium thiosulfate is replaced by an alkali metal thiosulfate.Type: GrantFiled: January 8, 1993Date of Patent: January 4, 1994Assignee: Eastman Kodak CompanyInventor: John R. Fyson
-
Patent number: 5270154Abstract: A method for making flowable alkaline thiosulfate, flowable alkaline sulfite, or a combination of the two, by blending an alkaline thiosulfate, an alkaline sulfite, or a combination of the two, with an alkali metal arylsulfonate.formaldehyde in an amount effective to render the alkaline thiosulfate, the alkaline sulfite, or the combination freely flowable, and the product of this method. It has been found that the product of this method, such as freely flowable ammonium thiosulfate powder mixture, can be stored in a freely flowable condition for extended periods of time and can be dissolved into solution readily to form a clear non-turbid solution. The freely flowable ammonium thiosulfate powdered mixture of the present invention is particularly useful as a photographic fixative and bleach fixative for processing photographic elements.Type: GrantFiled: January 31, 1992Date of Patent: December 14, 1993Assignee: Fuji Hunt Photographic Chemicals Inc.Inventors: Hongzoon Kim, Charles J. Pfeiffer
-
Patent number: 5258268Abstract: Photographic processing chemicals in solid form containing the necessary active ingredients and auxiliary substances and in addition at least one compound corresponding to formula (I)HO--R--O.sub.n H (I)whereinR denotes C.sub.2 -C.sub.4 -alkyl andn denotes 1-200or at least one compound corresponding to the following formulaR.sub.1 --OH (II)whereinR.sub.1 denotes C.sub.10 --C.sub.18 -alkylor at least one water-soluble polymer, e.g. selected from polystyrene sulphonic acid and polyvinyl alcohol, or a mixture of at least two of the above mentioned compounds in a quantity of from 0.5 to 100 g/kg of solid substance are dust free or relatively dust free.Type: GrantFiled: July 26, 1991Date of Patent: November 2, 1993Assignee: Agfa Gevaert AktiengesellschaftInventors: Karl-Heinz Reuter, Manfred Reichrath, Heinz Meckl
-
Patent number: 5240822Abstract: A packed photographic processing agent to be used for an automatic processor, in a plate form with holes solidified by adding a water-soluble polymer, is disclosed. It is lighter than the bottled conc. liquid type agent and more compact than the powder type agent packed in an envelope.A packed material made of disposable cardboard is teared off when it is pushed into a charging opening of an automatic solution preparing unit equipped to the automatic processor.Type: GrantFiled: July 26, 1991Date of Patent: August 31, 1993Assignee: Konica CorporationInventors: Kenichi Tanaka, Takeo Arai
-
Patent number: 5135840Abstract: Photographic processing chemicals in the form of granulates having an average particle diameter of from 150 to 3000 .mu.m containing a polymer having a molar mass of from 6,000,000 to 14,000,000 in a quantity from 1 to 1,000 mg/kg of granulate consisting of at least 80 mol % of one or more of the monomers, acrylamide, acrylic acid and cationic monomer or mixtures of acrylamide and cationic or anionic monomer are distinguished by being easy to prepare, dust free and freely pourable.Type: GrantFiled: March 8, 1991Date of Patent: August 4, 1992Assignee: Agfa Gevaert AktiengesellschaftInventors: Karl-Heinz Reuter, Heinz Meckl
-
Patent number: 5055382Abstract: A three-part bleach-fix regeneration kit is utilized to restore the capability of a spent bleach-fix solution to function as a working solution in photographic processing. The first part, which is an aqueous alkaline solution containing a buffering agent and an aminopolycarboxylic acid, is added to the spent bleach-fix solution prior to electrolytic recovery of silver therefrom. The second and third parts, which are aqueous acidic solutions containing, respectively, an iron salt and a thiosulfate fixing agent, are added after electrolytic recovery of silver. The first part functions to increase the pH of the spent bleach-fix solution to a level at which electrolytic silver recovery is optimized, while the second and third parts function to lower the pH to an optimum level for use in photographic processing. In addition to providing the necessary pH changes, addition of the three parts in this manner restores all necessary components to their proper concentration.Type: GrantFiled: February 1, 1989Date of Patent: October 8, 1991Inventors: John J. Long, Susan R. Krauss, Thomas P. Cribbs, III
-
Patent number: 5055384Abstract: A granulated photographic fixative or bleach fixative composed of grains containing both a thiosulphate and a disulphite is mechanically stable, dust free and freely pourable, will keep indefinitely and is distinguished by its great speed of solution.Type: GrantFiled: June 13, 1990Date of Patent: October 8, 1991Assignee: Agfa Gevaert AktiengesellschaftInventor: Peter Kuhnert
-
Patent number: 4987060Abstract: A concentrated alkaline photographic developer composition, packaged in a single part to be diluted with water to form a ready to use developing solution for silver halide photographic materials, which comprises dihydroxybenzene developing agents, inorganic alkali agnets, inorganic antioxidant agents, sequestering agents and antifoggants, wherein said inorganic antioxidant agents comprise Na.sub.2 SO.sub.3 (sodium sulfite) and K.sub.2 SO.sub.3 (potassium sulfite) in a molecular ratio of 1:1 to 1:3 in an amount of from 1.6 to 4 moles per liter, the molecular ratio between said inorganic antioxidant agents and the developing agents is from 1.50 and 4.00, and said concentrated developer composition has a specific gravity higher than 1.300 at 20.degree. C.Type: GrantFiled: March 23, 1990Date of Patent: January 22, 1991Assignee: Minnesota Mining and Manufacturing CompanyInventor: Carlo Marchesano
-
Patent number: 4956268Abstract: A two-part bleach-fixing solution composition comprising of a first concentrate composition containing a reducing compound comprising a silver halide solvent and a preservative as main components; and a second concentrate composition having a pH of 1.5 or less, containing an oxidizing compound comprising a bleaching agent and an acid as main components.The invention also relates to a method for processing a silver halide color photographic material by the steps of:(a) developing an exposed silver halide color photographic material comprising a support having thereon at least one red-sensitive silver halide emulsion layer containing at least one coupler represented by formula (I) or (II); at least one green-sensitive silver halide emulsion layer containing at least one coupler represented by formula (III) or (IV); and at least one blue-sensitive silver halide emulsion layer containing a yellow coupler represented by formula (V): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.Type: GrantFiled: April 26, 1989Date of Patent: September 11, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Kiyoshi Nakazyo, Takatoshi Ishikawa, Yoshikazu Fujita