Patents by Inventor Yoshihiko Shibahara

Yoshihiko Shibahara 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).

  • Patent number: 7312896
    Abstract: To provide a digital printing system that can satisfactorily reproduce yellow, magenta, and cyan colors, respectively, and can excellently reproduce specific skin tones and have significantly improved sensory image quality, a digital printing system reproduces a yellow (Y) color having a* and b* values of ?15 to 0 and +71 to +85, respectively, in the CIE 1976 (L*a*b*) color space at a blue density of 1.0; a magenta (M) color having a* and b* values of +50 to +65 and ?30 to 0, respectively, at a green density of 1.0; and a cyan (C) color having a* and b* values of ?45 to ?15 and ?40 to ?5, respectively, at a red density of 1.0 and produces a print having L*, a*, and b* values of +58 to +78, +20 to +30, and +25 to +32, respectively, from digital image data with RGB values of 239, 167, and 127, respectively.
    Type: Grant
    Filed: October 21, 2003
    Date of Patent: December 25, 2007
    Assignee: Fujifilm Corporation
    Inventors: Yoshihiko Shibahara, Yoshisada Nakamura
  • Patent number: 7046343
    Abstract: A read-out image is acquired by covering an image storage sheet, which contains a color image, with an image storage sheet pushing surface of a platen cover and reading out an image of a region on the image storage sheet pushing surface of the platen cover, the region on the image storage sheet pushing surface containing the image storage sheet. A region corresponding to the image storage sheet in the read-out image is then recognized. The image storage sheet pushing surface of the platen cover has a color other than colors which are ordinarily contained in image storage sheets. The region corresponding to the image storage sheet is recognized by judging that a pixel in the read-out image, which pixel represents a color different from the color of the image storage sheet pushing surface of the platen cover, is a pixel falling within the region corresponding to the image storage sheet.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: May 16, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihiko Shibahara, Akira Yoda, Shinpei Ikenoue
  • Patent number: 6874882
    Abstract: The ink set for inkjet recording and an inkjet recording method in the present invention, which can provide a recorded image having high quality and ensure that the obtained image can maintain the image quality with less change in the color balance even when stored in an oxidative atmosphere, and which includes at least three kinds of inkjet inks, each of which includes a coloring agent dissolved or dispersed in an aqueous or oily medium and has a maximum absorption spectrum in a spectral absorption region different from each other, wherein, when a photographic printing is performed on a reflection-type image-receiving medium using the ink set and a forced discoloration rate constant with an ozone gas of each ink is determined in each printed region of said at least three kinds of inks, the ratio of any two of the forced discoloration rate constants is from 0.5 to 2.0.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: April 5, 2005
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiki Taguchi, Yoshihiko Shibahara
  • Publication number: 20040139882
    Abstract: The ink set for inkjet recording and an inkjet recording method in the present invention, which can provide a recorded image having high quality and ensure that the obtained image can maintain the image quality with less change in the color balance even when stored in an oxidative atmosphere, and which comprises at least three kinds of inkjet inks, each of which includes a coloring agent dissolved or dispersed in an aqueous or oily medium and has a maximum absorption spectrum in a spectral absorption region different from each other, wherein, when a photographic printing is performed on a reflection-type image-receiving medium using the ink set and a forced discoloration rate constant with an ozone gas of each ink is determined in each printed region of said at least three kinds of inks, the ratio of any two of the forced discoloration rate constants is from 0.5 to 2.0.
    Type: Application
    Filed: July 21, 2003
    Publication date: July 22, 2004
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Toshiki Taguchi, Yoshihiko Shibahara
  • Publication number: 20040085556
    Abstract: To provide a digital printing system that can satisfactorily reproduce yellow, magenta, and cyan colors, respectively, and can excellently reproduce specific skin tones and have significantly improved sensory image quality, a digital printing system reproduces a yellow (Y) color having a* and b* values of −15 to 0 and +71 to +85, respectively, in the CIE 1976 (L*a*b*) color space at a blue density of 1.0; a magenta (M) color having a* and b* values of +50 to +65 and −30 to 0, respectively, at a green density of 1.0; and a cyan (C) color having a* and b* values of −45 to −15 and −40 to −5, respectively, at a red density of 1.0 and produces a print having L*, a*, and b* values of +58 to +78, +20 to +30, and +25 to +32, respectively, from digital image data with RGB values of 239, 167, and 127, respectively.
    Type: Application
    Filed: October 21, 2003
    Publication date: May 6, 2004
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Yoshihiko Shibahara, Yoshisada Nakamura
  • Patent number: 6586079
    Abstract: A recording material having a resin layer containing a polyester resin as a main component on a support, the recording material is disclosed in having (A) a groove or grooves placed continuously or intermittently extending linearly with a depth not less than 45% but not more than 90% of the thickness of the recording material, or (B) linearly continuous holes wherein width of the holes is not less than 15·m and not more than 130·m, length of the holes is not less than 50·m and not more than 500·m, and interval between the holes is not less than 30·m and not more than 300·m. In use of this recording material, printed items in a desired size can be formed rapidly and easily.
    Type: Grant
    Filed: May 22, 2000
    Date of Patent: July 1, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihiko Shibahara, Fumihiro Oguri, Mio Fujimoto, Tsutomu Iida
  • Publication number: 20010028475
    Abstract: A read-out image is acquired by covering an image storage sheet, which contains a color image, with an image storage sheet pushing surface of a platen cover and reading out an image of a region on the image storage sheet pushing surface of the platen cover, the region on the image storage sheet pushing surface containing the image storage sheet. A region corresponding to the image storage sheet in the read-out image is then recognized. The image storage sheet pushing surface of the platen cover has a color other than colors which are ordinarily contained in image storage sheets. The region corresponding to the image storage sheet is recognized by judging that a pixel in the read-out image, which pixel represents a color different from the color of the image storage sheet pushing surface of the platen cover, is a pixel falling within the region corresponding to the image storage sheet.
    Type: Application
    Filed: December 8, 2000
    Publication date: October 11, 2001
    Inventors: Yoshihiko Shibahara, Akira Yoda, Shinpei Ikenoue
  • Patent number: 6001463
    Abstract: An image recording medium comprises a support, a polyolefin layer, a polyvinyl alcohol layer and a surface gelatin layer in the order. The polyolefin layer contains polyolefin in an amount of not less than 50 wt. %. The polyolefin layer has a thickness in the range of 10 to 100 .mu.m. The polyvinyl alcohol layer contains a vinyl alcohol polymer in an amount of not less than 50 wt. %. The vinyl alcohol polymer comprises vinyl alcohol units in an amount of 50 to 90 mole %. The polyvinyl alcohol layer has a thickness in the range of 2 to 20 .mu.m. The surface gelatin layer contains gelatin in an amount of not less than 50 wt. %. The surface gelatin layer has a thickness in the range of 0.2 to 2 .mu.m. The surface gelatin layer further contains solid particles. The solid particles have an average particle size in the range of 3 to 100 .mu.m. The image recording medium is advantageously used in an image recording process according to an ink jet method.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: December 14, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihiko Shibahara, Junichi Yamanouchi
  • Patent number: 5753422
    Abstract: A silver halide color photographic material is disclosed, which comprises a support having thereon a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, and a blue-sensitive silver halide emulsion layer, wherein at least one emulsion layer contains a monodisperse tabular silver halide emulsion having an aspect ratio of 3 or more and less than 100 and relative standard deviation of grain sizes of 20% or less, and at least one layer contains at least one of the anionic water-soluble polymer represented by formula (1), the dispersion of alkali-soluble polymer represented by formula (2), or the dispersion of polymer represented by formula (3): ##STR1## wherein the substituents are as defined herein the specification.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: May 19, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihiko Shibahara, Junichi Yamanouchi
  • Patent number: 5691125
    Abstract: There is disclosed a silver halide color photographic material having a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, a blue-sensitive silver halide emulsion layer, which comprises a cyan dye-forming coupler represented by formula (I) and (a) a monodisperse silver halide emulsion, (b) non-photosensitive silver halide emulsion wherein the inside or the surface of grains is fogged, (c) a colloidal silver, (d) negative-type interval latent image-type silver halide grains chemically sensitized to a defined depth from the surface, (e) a sensitizing dye containing a sulfonamide group, (f) three separated layers of high, medium, and low sensitivities, (g) two separated layers each having different content of iodine, (h) grains each having a defined spectral sensitivity distribution and a DIR-hydroquinone, or (i) a DIR-hydroquinone: formula (I) ##STR1## wherein R.sup.1 represents a hydrogen atom or a substituent, R.sup.
    Type: Grant
    Filed: June 19, 1996
    Date of Patent: November 25, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takefumi Hara, Kazuyoshi Yamakawa, Sadanobu Shuto, Mitsuru Yamamoto, Makoto Suzuki, Yasuhiro Shimada, Katsuro Nagaoka, Satoshi Nagaoka, Yoshihiko Shibahara, Hideo Ikeda
  • Patent number: 5578436
    Abstract: There is disclosed a silver halide color photographic material having a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, a blue-sensitive silver halide emulsion layer, which comprises a cyan dye-forming coupler represented by formula (I) and (a) a monodisperse silver halide emulsion, (b) non-photosensitive silver halide emulsion wherein the inside or the surface of grains is fogged, (c) a colloidal silver, (d) negative-type interval latent image-type silver halide grains chemically sensitized to a defined depth from the surface, (e) a sensitizing dye containing a sulfonamide group, (f) three separated layers of high, medium, and low sensitivities, (g) two separated layers each having different content of iodine, (h) grains each having a defined spectral sensitivity distribution and a DIR-hydroquinone, or (i) a DIR-hydroquinone: formula (I) ##STR1## wherein R.sup.1 represents a hydrogen atom or a substituent, R.sup.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: November 26, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takefumi Hara, Kazuyoshi Yamakawa, Sadanobu Shuto, Mitsuru Yamamoto, Makoto Suzuki, Yasuhiro Shimada, Katsuro Nagaoka, Satoshi Nagaoka, Yoshihiko Shibahara, Hideo Ikeda
  • Patent number: 5429915
    Abstract: A silver halide color photographic light-sensitive material has red-, green-, and blue-sensitive silver halide emulsion layers, and the red-sensitive emulsion layer contains a cyan coupler and a yellow coupler with a relative coupling rate of 0.7 to 3.0 with respect to the cyan coupler. In addition, at least one layer may contain a specific DIR compound, the average silver iodide content of a silver halide emulsion contained in the red-sensitive silver halide emulsion may be higher than that of a silver halide emulsion contained in the green-sensitive silver halide emulsion layer, or at least one layer may contain a monodisperse silver halide grain emulsion with a grain diameter/grain thickness ratio of 2 to 8.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: July 4, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihiko Shibahara, Kei Sakanoue
  • Patent number: 5268262
    Abstract: A silver halide photographic material containing a support having provided thereon blue-sensitive, green-sensitive, and red-sensitive layers, in which at least the blue-sensitive layer is composed of at least two layers including a more sensitive layer and a less sensitive layer. The most sensitive layer of the blue-sensitive layer is a blue-sensitive layer containing an emulsion of substantially monodispersed grains, and at least one layer other than the most sensitive layer contains an emulsion containing tabular silver halide grains of about 5:1 or more in average aspect ratio. The material has superior sharpness and graininess, and is useful for color photography.
    Type: Grant
    Filed: October 1, 1992
    Date of Patent: December 7, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihiko Shibahara, Shinpei Ikenoue
  • Patent number: 5091293
    Abstract: A high-speed color negative photographic material which comprises, a support having provided thereon, at least one red-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer and at least one blue-sensitive emulsion layer, and is designated so as to acquire a specific photographic sensitivity (defined in detailed description of the invention) of 800 or above, and has a combined total of silver coverages ranging from 3.0 g/m.sup.2 to 9.0 g/m.sup.2 so as to minimize an increase in fog, a decrease in photographic speed and deterioration in granularity, which heretofore have occurred in high-speed photographic materials during long-range storage before used. In addition, the present photographic material enables enhancement of pressure resistance and processing efficiency.
    Type: Grant
    Filed: June 25, 1990
    Date of Patent: February 25, 1992
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Nozawa, Hideto Ikoma, Keiji Mihayashi, Yoshihiko Shibahara
  • Patent number: 4952485
    Abstract: A silver halide color negative photographic material having at least one blue-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer and at least one red-sensitive silver halide emulsion layer on a support, which is characterized in that the combined total of silver contents in the material is from 3.0 g/m.sup.2 to 8.0 g/m.sup.2 and the specific photographic sensitivity of the material is from 320 to less than 800. The material has improved sharpness and graininess and has high processability including pressure-resistance. Even after stored for long periods of time, the graininess of the material does not deteriorate.
    Type: Grant
    Filed: November 28, 1989
    Date of Patent: August 28, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihiko Shibahara, Yasushi Nozawa, Keiji Mihayashi
  • Patent number: 4923793
    Abstract: A silver halide photographic material, comprising:at least one negative type silver halide emulsion layer coated onto a support;at least one compound represented by general formula (I), said compound being included in at least said one emulsion layer; andsensitivity specks present in at least one kind of silver halide grains which are included in the said emulsion layer whereby said sensitivity specks are present within the grains at a depth of at least 2 nm, but less than 50 nm, from the surface of the grains, with the number of said sensitivity speck on the surface of the grains being at least 1/10th, but not more than 5/10ths of the maximum value of sensitivity speck distribution in the depth direction, ##STR1## wherein, Z.sub.2 represents a heterocyclic ring having at least one substituent group selected from the group consisting of --SO.sub.3 M, --COOR.sub.2, --OH and --NHR.sub.3, M is selected from the group consisting of hydrogen atom, an alkali metal and an --NR.sub.4 group, R.sub.
    Type: Grant
    Filed: November 22, 1988
    Date of Patent: May 8, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yoshihiko Shibahara
  • Patent number: 4835095
    Abstract: A photosensitive silver halide emulsion whose grain diameter/grain thickness ratio is 5 or more. The grains of the emulsion each comprises a core that consists substantially of silver bromoiodide containing from 4 to 20 mol % of silver iodide, and a shell that covers the core and consists substantially of silver bromide or silver bromoiodide containing 3 mol % or less of silver iodide, and the relative standard deviation of the silver iodide content among the grains of the emulsion is 20% or less.
    Type: Grant
    Filed: February 3, 1987
    Date of Patent: May 30, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yuichi Ohashi, Yoshihiko Shibahara, Katsumi Makino, Hiroshi Takehara
  • Patent number: 4728602
    Abstract: A light-sensitive silver iodobromide emulsion containing core/shell silver iodobromide grains having a core substantially comprising silver iodobromide containing at least about 5 mol % of silver iodide and a shell selected from the group consisting of (a) a shell comprising silver iodobromide having a lower silver iodide content than that of the silver iodobromide of the core and (b) a shell comprising silver bromide, wherein the relative standard deviation of the silver iodide content of the individual grains of said silver halide emulsion is lower than about 20%.
    Type: Grant
    Filed: October 7, 1986
    Date of Patent: March 1, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihiko Shibahara, Shingo Ishimaru, Jun Okuda
  • Patent number: 4680253
    Abstract: A silver halide color photographic material which comprises a support having coated thereon at least one blue-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer and at least one red-sensitive silver halide emulsion layer, characterized in that the gradation of each of the blue-, green- and red-sensitive layers satisfies the following relation: ##EQU1## wherein .gamma..sub.B (10.sup.-4), .gamma..sub.G (10.sup.-4) and .gamma..sub.R (10.sup.-4) represent gradation of the blue-, green- and red- sensitive layers upon 1/10,000 second exposure, respectively and .gamma..sub.B (10.sup.-2), .gamma..sub.G (10.sup.-2) and .gamma..sub.R (10.sup.-2) represent those upon 1/100 second exposure, respectively, which provides a color picture having good color and tone reproduction in both regular and flash photography.
    Type: Grant
    Filed: February 25, 1986
    Date of Patent: July 14, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihiko Shibahara, Hideto Ikoma
  • Patent number: 4574102
    Abstract: A radiation image storage panel comprising a support, a phosphor layer provided on the support which comprises a binder and a stimulable phosphor dispersed therein, and a protective film provided on the phosphor layer, characterized in that a mixing ratio of the binder to the stimulable phosphor in said phosphor layer so varies as to show a minimum value within a region of depth of from 1/5 to 4/5 of the thickness of the phosphor layer, the depth being expressed in terms of relative distance from the protective film-side surface.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: March 4, 1986
    Assignee: Fuji Photo Film Company, Ltd.
    Inventors: Satoshi Arakawa, Terumi Matsuda, Akio Ishizuka, Yoshihiko Shibahara