Patents by Inventor Takeshi Sampei

Takeshi Sampei has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20020058211
    Abstract: A photothermographic material is disclosed, comprising a support, a silver halide, an organic silver salt and a reducing agent, wherein the photothermographic material meets the following requirement:
    Type: Application
    Filed: March 12, 2001
    Publication date: May 16, 2002
    Inventor: Takeshi Sampei
  • Patent number: 6387604
    Abstract: A processing method which thermally develops a thermally developable photosensitive material which is exposed imagewise, comprising the step of thermally developing said thermally developable photosensitive material using heating element which intermittently heats and has duration time of surface temperature of not less than 250° C. to be not more than 1 second, wherein said thermally developable photosensitive material comprising a support having thereon one layer or plural layers; containing organic silver salt, photosensitive silver halide grains and a reducing agent.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: May 14, 2002
    Assignee: Konica Corporation
    Inventor: Takeshi Sampei
  • Publication number: 20010018169
    Abstract: A processing method which thermally develops a thermally developable photosensitive material which is exposed imagewise, comprising the step of thermally developing said thermally developable photosensitive material using heating element which intermittently heats and has duration time of surface temperature of not less than 250° C. to be not more than 1 second, wherein said thermally developable photosensitive material comprising a support having thereon one layer or plural layers; containing organic silver salt, photosensitive silver halide grains and a reducing agent.
    Type: Application
    Filed: January 26, 1999
    Publication date: August 30, 2001
    Inventor: TAKESHI SAMPEI
  • Patent number: 6258524
    Abstract: A thermally developable material comprising a support, an image forming layer containing an organic silver salt, and a component layer provided on the same side as said image forming layer provided, wherein the stiffness (ST) of said thermally developable material under conditions of 23° C. and 50% RH is 30 g≦ST≦80 g.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: July 10, 2001
    Assignee: Konica Corporation
    Inventors: Kazuhiko Hirabayashi, Takeshi Sampei, Kenji Goto
  • Patent number: 6190854
    Abstract: A thermally developable material comprising a support, an image forming layer containing organic silver salts, and a component layer provided on the image forming layer side, wherein a smooster value on the surface of said image forming layer side of said thermally developable material is not more than 40 mm Hg, and said image forming layer or said component layer contains a fluorine containing surfactant.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: February 20, 2001
    Assignee: Konica Corporation
    Inventor: Takeshi Sampei
  • Patent number: 5962202
    Abstract: A method for processing a black-and-white silver halide photographic light-sensitive material. The method comprises the steps of (1) developing the black-and-white photographic light-sensitive material containing a quaternary onium compound with a developer containing ascorbic acid or a derivative thereof and having a pH value of from 8.0 to 10.0, (2) fixing the light-sensitive material, (3) washing the light-sensitive material by an automatic processor having a multi-step counter flow washing system, and (4) drying the light-sensitive material.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: October 5, 1999
    Assignee: Konica Corporation
    Inventor: Takeshi Sampei
  • Patent number: 5766821
    Abstract: A black-and-white silver halide photographic light-sensitive material is disclosed.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: June 16, 1998
    Assignee: Konica Corporation
    Inventors: Yasuhiko Muramatsu, Takeshi Sampei
  • Patent number: 5624786
    Abstract: An image forming method is disclosed, comprising exposing a silver halide photographic material through a transparent, high definition-screening original and developing the photographic material with a developer to form a halftone dot image, wherein:the photographic material forms a halftone dot image having a dot area of 57% or less when exposed, through the transparent original comprising a halftone dot image having a dot area of 50%, in two times an amount that gives a halftone dot having a dot area of 50%; and the photographic material has a maximum density of 3.0 or more and a contrast of 8.0 or more;and wherein the photographic material is exposed to light having an emission peak at a wavelength of 360 to 450 nm and developed with a developer having a pH of 10.5 or less.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: April 29, 1997
    Assignee: Konica Corporation
    Inventors: Kazuhiko Hirabayashi, Takeshi Sampei
  • Patent number: 5618661
    Abstract: A method for processing a silver halide photographic light-sensitive material by an automatic processor is disclosed. The processing method comprises the steps of (1) developing a silver halide photographic light-sensitive material with a developer being in a developing tank of said automatic processor while replenishing a developer replenisher in a rate of from 50 ml to 330 ml per square meter of the light-sensitive material processed and (2) fixing said developed silver halide photographic light-sensitive material with a fixer being in a fixing tank of said automatic processor while replenishing a fixer replenisher in a rate of from 50 ml to 330 ml per square meter of the light-sensitive material. The light-sensitive material comprises a support and at least one silver halide emulsion layer provided on a surface of a support which is a stretched film composed of a styrene copolymer having a syndiotactic structure or a composition containing said styrene copolymer.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: April 8, 1997
    Assignee: Konica Corporation
    Inventor: Takeshi Sampei
  • Patent number: 5523196
    Abstract: Disclosed is a method for developing a silver halide photographic light-sensitive material with a developer having a pH within the range of 9.5 to 10.7 through an automatic processor, wherein said silver halide photographic light-sensitive material comprises a support and thereon, at least one silver halide emulsion layer comprising silver halide grains containing at least 60 mol % of silver chloride, comprising the steps of:replenishing a first developer replenishing-solution having lower activity than a starter for a developer; andreplenishing a second developer replenishing-solution having the substantially same activity as said starter for a developer.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: June 4, 1996
    Assignee: Konica Corporation
    Inventors: Mariko Iwashita, Takeshi Sampei
  • Patent number: 5506092
    Abstract: A method of developing with developer an exposed black and white silver halide photographic light-sensitive material is disclosed, the developer containing a compound represented by the following Formula (1a) , (1b) , (2) or (3) and a compound represented by the following Formula (4) or (5): ##STR1##
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: April 9, 1996
    Assignee: Konica Corporation
    Inventors: Wataru Ishikawa, Takeshi Sampei
  • Patent number: 5476747
    Abstract: A silver halide photographic light-sensitive material comprises a support and provided thereon, a photographic component layer comprising a silver halide emulsion layer and a hydrophilic colloid layer other than the emulsion layer, wherein the photographic component layer contains a hydrazine derivative, a nucleation accelerating agent and polymer latex containing as a protective colloid a hydrophilic polymer having an average number molecular weight of 1,000 to 1,000,000 and having a solubility of not less than 0.1 g in 100 g of water at 20.degree. C., provided that the hydrophilic polymer is not gelatin.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: December 19, 1995
    Assignee: Konica Corporation
    Inventors: Kazuhiro Yoshida, Takeshi Sampei, Toshiyuki Takabayashi
  • Patent number: 5441847
    Abstract: A method of processing, by use of an automatic processor, a black-and-white silver halide photographic light-sensitive material containing a hydrazine compound and a redox compound capable of releasing an inhibitor upon oxidation, wherein a developer is replenished by a developer replenisher at a rate of not more than 200 ml per m.sup.2 of the photographic material, and the developer has a pH of 9.5 to 10.8. The developer further contains a compound represented by the following formulas [1], [2] or [3].
    Type: Grant
    Filed: May 26, 1994
    Date of Patent: August 15, 1995
    Assignee: Konica Corporation
    Inventors: Junichi Fukawa, Takeshi Sampei, Kenji Goto
  • Patent number: 5254445
    Abstract: A method of manufacturing silver halide photographic light-sensitive material with little habitual curling is disclosed. The material, after being coated with a silver halide emulsion layer and antistatic layer on the polyester support, is rolled around a core with its emulsion side facing outside, and then heated at the temperature not less than 30.degree. C. After the heat-treatment, the material is cut and re-rolled on a commercial size core with its emulsion side facing inside.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: October 19, 1993
    Assignee: Konica Corporation
    Inventors: Yasuhiko Takamuki, Takeshi Sampei
  • Patent number: 5244773
    Abstract: A silver halide photographic light sensitive material having high contrast photographic characteristics and excellent antistatic properties is provided by incorporating a hydrazine compound represented by formula 1 or 2 and a nucleation-promoting compound selected from the group consisting of amine compounds and quaternary onium salts; and by coating an electrically conductive layer on a support.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: September 14, 1993
    Assignee: Konica Corporation
    Inventors: Yasuhiko Muramatsu, Takeshi Sampei
  • Patent number: 5219724
    Abstract: A method of producing a silver halide photographic light-sensitive material is disclosed. The light-sensitive material comprises a support, provided thereon, a photographic layer including a silver halide emulsion layer and the photographic layer contains a hydrazine compound for forming an extremely high contrast image even when developed with a developer having a pH value of not higher than 11. The light-sensitive material is produced by the method comprising steps ofcoating a coating solution to form the photographic layer on the support,drying the coated layer, andpacking the light-sensitive material after the drying step,wherein the drying of the coated layer is carried out with air having relative humidity of not more than 50% after the time when water amount contained in the coated layer reaches 300% of the dry-weight of binder contained in the coated layer. The light-sensitive material has inhibited in formation of pepper spots and gives high contrast image even after prolonged storage.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: June 15, 1993
    Assignee: Konica Corporation
    Inventors: Mariko Kato, Takeshi Sampei
  • Patent number: 5155007
    Abstract: An improved silver halide photographic material that has at least one silver halide emulsion layer on a support and that contains a hydrazine derivative in said emulsion layer or an adjacent layer. The improvement is that said emulsion layer or at least one of the other hydrophilic colloidal layers contains at least one of the compounds represented by the following general formulas (I) and (II): ##STR1## wherein R.sub.1 and R.sub.1 ' are each a group selected from among a substituted or unsubstituted alkane residue, an alkene residue, a benzene residue, a cyclohexane residue and a nitrogenous heterocyclic residue; R.sub.2 is a substituted or unsubstituted alkyl group; R.sub.3, R.sub.3 ', R.sub.4 and R.sub.4 ' are each a hydrogen atom or a substituted or unsubstituted methyl group, provided that R.sub.3 and R.sub.4 or R.sub.
    Type: Grant
    Filed: March 22, 1991
    Date of Patent: October 13, 1992
    Assignee: Konica Corporation
    Inventors: Yoji Hara, Akira Kobayashi, Takeshi Sampei, Miho Sai, Akira Ogasawara
  • Patent number: 5130226
    Abstract: A silver halide photographic light-sensitive material suitable for photomechanical process is disclosed. The light-sensitive material comprises a support and a silver halide emulsion layer and the emulsion layer or a layer adjacent to the emulsion layer contains a compound represented by formula 1, 2 or 3 and a compound represented by formula 4 or 5. ##STR1## The light-sensitive material give extreme high contrast images by processing usung a stable developer and is inhibited from producing pepper fog.
    Type: Grant
    Filed: September 12, 1991
    Date of Patent: July 14, 1992
    Assignee: Konica Corporation
    Inventors: Takeshi Sampei, Akira Ogasawara, Miho Sai, Yoji Hara
  • Patent number: 4898809
    Abstract: A silver halide photographic light-sensitive material is disclosed, which has high sensitivity and can be handled under bright safelight. The photographic material comprises a support bearing thereon photographic component layers including at least one silver halide emulsion layer containing a silver halide emulsion sensitized so as to have a maximum spectral sensitivity on the side of a wavelength shorter than at least 600 nm and at least one non-light-sensitive hydrophilic colloid layer arranged to the side of the silver halide emulsion layer opposite to the support. And at least one of the hydrophilic colloid layers contains a water-soluble dye having a maximum light-absorption within the wavelength region of not less than 700 nm.
    Type: Grant
    Filed: August 3, 1988
    Date of Patent: February 6, 1990
    Assignee: Konica Corporation
    Inventor: Takeshi Sampei
  • Patent number: H1281
    Abstract: The improve silver halide photographic material contains a specified hydrazide compound and a specified polyoxyethylene based compound and is capable of providing high-contrast image with high sensitivity in a rapid and consistent way.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: January 4, 1994
    Assignee: Konica Corporation
    Inventors: Kazuhiko Hirabayashi, Takeshi Sampei, Yoji Hara, Miho Sai