Patents by Inventor Ashita Murai

Ashita Murai 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: 8288008
    Abstract: An image recording material which has a support and an image recording layer containing a crystalline polymer and an amorphous polymer on at least one surface of the support, wherein the image recording layer has a storage elastic modulus G? at 100° C. of 1×102 Pa to 1×105 Pa during a temperature increase at 5° C./min, a storage elastic modulus G? at 60° C. of 1×106 Pa or more during a temperature decrease at 5° C./min and a temperature difference of 18° C. or less between a temperature at which the storage elastic modulus G? during a temperature increase at 5° C./min reaches 1×105 Pa and a temperature at which the storage elastic modules G? during a temperature decrease at 5° C./min reaches 1×105 Pa, upon measurement of viscoelasticity by using a rheometer of plate-to-plate distance: 1.5 mm, diameter: 20 mm.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: October 16, 2012
    Assignee: FUJIFILM Corporation
    Inventors: Yasutomo Goto, Ashita Murai, Shinji Fujimoto, Yoshio Tani
  • Patent number: 7972760
    Abstract: The present invention provides an electrophotographic image receiving sheet including a support, and at least two toner image receiving layers formed over at least one surface of the support, wherein a mixture mass ratio M of a crystalline polymer and an amorphous polymer in each of the toner image receiving layers is defined as [A/(A+B)], where A represents a mass of the crystalline polymer (g), and B represents a mass of the amorphous polymer (g), and a mixture mass ratio M1 of the outermost toner image receiving layer which is located farthest from the support, and a mixture mass ratio M2 of the highest inner toner image receiving layer, which has the highest mixture mass ratio among the inner toner image receiving layers located under the outermost toner image receiving layer, satisfy the relation: M1<M2.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: July 5, 2011
    Assignee: Fujifilm Corporation
    Inventors: Ashita Murai, Shinji Fujimoto, Yasutomo Goto, Yoshio Tani
  • Patent number: 7972759
    Abstract: Provided are an electrophotographic image-receiving sheet that comprises a support, a toner image-receiving layer on at least one side of the support, wherein the toner image-receiving layer is formed from a coating liquid for the toner image-receiving layer and the coating liquid for the toner image-receiving layer comprises an aqueous dispersion that comprises a crystalline polymer, and an image forming method that employs the electrophotographic image-receiving sheet.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: July 5, 2011
    Assignee: FUJIFILM Corporation
    Inventors: Shinji Fujimoto, Ashita Murai, Yasutomo Goto, Yoshio Tani, Masuo Murakami, Tetsuo Matsumoto
  • Patent number: 7776429
    Abstract: An object of the present invention is to provide a support for image recording material, which can record high quality images without causing blister, unevenness of recording and unevenness of fixation; various image recording materials using the support for image recording material; and an image recording method. Therefore, the present invention provides a support for image recording material, comprising a base paper and at least one polyolefin resin layer formed on both surfaces of the base paper, wherein a front surface polyolefin resin layer at the side of the polyolefin resin layer, on which an image recording layer is formed, is composed of two or more layers, and an average density of an outermost front surface polyolefin resin layer, which is located farthest from the base paper, is less than that of at least any front surface polyolefin resin layers other than the outermost front surface polyolefin resin layer.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: August 17, 2010
    Assignee: FUJIFILM Corporation
    Inventors: Shinji Fujimoto, Kazuhito Miyake, Ashita Murai, Ryuichi Katsumoto, Shigehisa Tamagawa
  • Publication number: 20100129747
    Abstract: The present invention provides an electrophotographic image receiving sheet including a support, and at least two toner image receiving layers formed over at least one surface of the support, wherein a mixture mass ratio M of a crystalline polymer and an amorphous polymer in each of the toner image receiving layers is defined as [A/(A+B)], where A represents a mass of the crystalline polymer (g), and B represents a mass of the amorphous polymer (g), and a mixture mass ratio M1 of the outermost toner image receiving layer which is located farthest from the support, and a mixture mass ratio M2 of the highest inner toner image receiving layer, which has the highest mixture mass ratio among the inner toner image receiving layers located under the outermost toner image receiving layer, satisfy the relation: M1<M2.
    Type: Application
    Filed: April 8, 2008
    Publication date: May 27, 2010
    Applicant: FUJIFILM Corporation
    Inventors: Ashita Murai, Shinji Fujimoto, Yasutomo Goto, Yoshio Tani
  • Patent number: 7687217
    Abstract: The present invention provides an image-receiving sheet for electrophotography which contains a support, and a raw paper, wherein the support contains at least one layer of a polymer coating layer on both surfaces of the raw paper and at least one layer of a toner image-receiving layer on a surface of the support; and the tensile strength in the Z-axis direction of the raw paper defined in the JAPAN TAPPI Paper and Pulp Test Method No. 18-1 is 350 kN/m2 to 650 kN/m2. The present invention also provides an image forming process using the image-receiving sheet for electrophotography.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: March 30, 2010
    Assignee: FUJIFILM Corporation
    Inventors: Shigehisa Tamagawa, Ashita Murai, Shinji Fujimoto
  • Publication number: 20090023090
    Abstract: The present invention provides a support for image recording material etc. that can record high-quality images far from occurrences of blister, uneven recording or uneven fixing. In order to attain the object, a support for image recording material is provided that comprises a raw paper, and at least one polyolefin resin layer on both sides of the raw paper, wherein two or more polyolefin resin layers are disposed at the front side where an image recording layer is to be disposed, polypropylene resin is included within at least one polyolefin resin layer at the front side other than the outermost polyolefin resin layer at the front side, and the content A (% by mass) of polypropylene resin within the at least one polyolefin resin layer at the front side other than the outermost polyolefin resin layer is higher than the content B (% by mass) of polypropylene resin within the outermost polyolefin resin layer at the front side.
    Type: Application
    Filed: January 17, 2006
    Publication date: January 22, 2009
    Inventors: Shinji Fujimoto, Kazuhito Miyake, Ashita Murai, Ryuichi Katsumoto
  • Publication number: 20080108501
    Abstract: An object of the present invention is to provide a support for image recording material, which can record high quality images without causing blister, unevenness of recording and unevenness of fixation; various image recording materials using the support for image recording material; and an image recording method. Therefore, the present invention provides a support for image recording material, comprising a base paper and at least one polyolefin resin layer formed on both surfaces of the base paper, wherein a front surface polyolefin resin layer at the side of the polyolefin resin layer, on which an image recording layer is formed, is composed of two or more layers, and an average density of an outermost front surface polyolefin resin layer, which is located farthest from the base paper, is less than that of at least any front surface polyolefin resin layers other than the outermost front surface polyolefin resin layer.
    Type: Application
    Filed: September 29, 2005
    Publication date: May 8, 2008
    Applicant: Fujifilm Corporation
    Inventors: Shinji Fujimoto, Kazuhito Miyake, Ashita Murai, Ryuichi Katsumoto, Shigehisa Tamagawa
  • Publication number: 20080081274
    Abstract: An image recording material which has a support and an image recording layer containing a crystalline polymer and an amorphous polymer on at least one surface of the support, wherein the image recording layer has a storage elastic modulus G? at 100° C. of 1×102 Pa to 1×105 Pa during a temperature increase at 5° C./min, a storage elastic modulus G? at 60° C. of 1×106 Pa or more during a temperature decrease at 5° C./min and a temperature difference of 18° C. or less between a temperature at which the storage elastic modulus G? during a temperature increase at 5° C./min reaches 1×105 Pa and a temperature at which the storage elastic modules G? during a temperature decrease at 5° C./min reaches 1×105 Pa, upon measurement of viscoelasticity by using a rheometer of plate-to-plate distance: 1.5 mm, diameter: 20 mm.
    Type: Application
    Filed: September 19, 2007
    Publication date: April 3, 2008
    Applicant: FUJIFILM Corporation
    Inventors: Yasutomo GOTO, Ashita MURAI, Shinji FUJIMOTO, Yoshio TANI
  • Publication number: 20080057419
    Abstract: Provided are an electrophotographic image-receiving sheet that comprises a support, a toner image-receiving layer on at least one side of the support, wherein the toner image-receiving layer is formed from a coating liquid for the toner image-receiving layer and the coating liquid for the toner image-receiving layer comprises an aqueous dispersion that comprises a crystalline polymer, and an image forming method that employs the electrophotographic image-receiving sheet.
    Type: Application
    Filed: July 17, 2007
    Publication date: March 6, 2008
    Applicant: FUJIFILM Corporation
    Inventors: Shinji Fujimoto, Ashita Murai, Yasutomo Goto, Yoshio Tani, Masuo Murakami, Tetsuo Matsumoto
  • Publication number: 20070148418
    Abstract: The present invention provides an image-receiving sheet for electrophotography which contains a support, and a raw paper, wherein the support contains at least one layer of a polymer coating layer on both surfaces of the raw paper and at least one layer of a toner image-receiving layer on a surface of the support; and the tensile strength in the Z-axis direction of the raw paper defined in the JAPAN TAPPI Paper and Pulp Test Method No. 18-1 is 350 kN/m2 to 650 kN/m2. The present invention also provides an image forming process using the image-receiving sheet for electrophotography.
    Type: Application
    Filed: December 19, 2006
    Publication date: June 28, 2007
    Applicant: FUJIFILM Corporation
    Inventors: Shigehisa Tamagawa, Ashita Murai, Shinji Fujimoto
  • Patent number: 7233765
    Abstract: An image forming apparatus includes a forming unit configured to form a latent electrostatic image on a latent electrostatic image bearing member based on a digital image; a developing unit configured to develop the latent electrostatic image with a toner to form a visible image; a transferring unit configured to transfer the visible image to one of an electrophotographic image receiving roll and an electrophotographic image receiving sheet; and a smoothing and fixing unit configured to smooth and fix the transferred image on one of the electrophotographic image receiving roll and the electrophotographic image receiving sheet to thereby form a series of electrophotographic prints and an electrophotographic print. In the apparatus, the hardware including the media, printer and unit for aftertreatment optimally matches with the toner, and the apparatus can produce high-quality images equal to silver-halide photographs.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: June 19, 2007
    Assignee: Fujifilm Corporation
    Inventors: Ashita Murai, Kazuhito Miyake, Hiroshi Nagate, Hiroshi Ishizuka, Yoichi Nakamura, Kenichi Saito, Hiroaki Nakamura, Eiichi Kito
  • Publication number: 20070122596
    Abstract: The present invention aims to provide an electrophotographic image-receiving sheet which can be more easily and efficiently manufactured and shows excellent image quality and glossiness, to provide a process for manufacturing the electrophotographic image-receiving sheet, and to provide a process for image formation using the electrophotographic image-receiving sheet. An electrophotographic image-receiving sheet which includes a support and a toner image-receiving layer which is to be disposed on at least one surface of the support and contains a thermoplastic resin, in which the electrophotographic image-receiving sheet is formed by soft calender treatment using a metal roller having surface temperature of glass transition temperature (Tg) of the thermoplastic resin minus 30° C. or more and the glass transition temperature plus 50° C. or less, so that the metal roller contacts a surface of the toner image-receiving layer.
    Type: Application
    Filed: January 25, 2007
    Publication date: May 31, 2007
    Inventors: Shigehisa Tamagawa, Ashita Murai, Yukio Hirashima, Yasuhiro Ogata, Yoshio Tani
  • Patent number: 7074495
    Abstract: The present invention aims to provide a recording material support having superior excellent surface smoothness and water resistance compared to the related art, to a process for efficiently manufacturing this recording material support, to a recording material which can form an image having excellent quality and gloss using this recording material support, and to process for image formation using this recording material. For this purpose, the recording material support comprising at least raw paper satisfies at least one condition selected from the Cobb size (30 seconds) of the surface on the side provided with the image-forming layer of the support, Oken type smoothness, Stökigt sizing degree, central square average roughness (SRa) and variation amount (?SRa) of SRa.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: July 11, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shigehisa Tamagawa, Yasuhiro Ogata, Yoshio Tani, Yoshisada Nakamura, Ashita Murai, Hiroshi Yamamoto
  • Patent number: 7074538
    Abstract: The invention provides an image forming method, comprising transferring a toner image to an electrophotographic recording sheet, layering the electrophotographic recording sheet on a fixing belt and heating and pressing the sheet, and cooling the electrophotographic recording sheet and separating the sheet from the fixing belt. The electrophotographic recording sheet comprises a support comprising cellulose pulp-containing base paper and a toner image-receiving layer comprising a thermoplastic resin disposed on the support. A shrinkage percentage of the electrophotographic recording sheet in a CD direction in the heating step is 1.3% or less. The support preferably further comprises either a polyolefin-containing layer or a coating that contains at least one selected from the group consisting of kaolin, a pigment, a resin, a rubber latex, or a polymer material and that is provided on one or both surfaces of the base paper.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: July 11, 2006
    Assignees: Fuji Xerox Co., Ltd., Fuji Photo Film Co., Ltd.
    Inventors: Kiyoshi Hosoi, Ashita Murai, Yasutomo Goto
  • Patent number: 6985688
    Abstract: To provide an electrophotographic method and apparatus for forming images stably having a good, agreeable, and natural texture in gloss equivalent to conventional silver halide photographic prints, an electrophotographic image-receiving sheet for use in the formation of such images and such an electrophotographic print, an image forming process produces an electrophotographic print by fixing a toner image on an electrophotographic image-receiving sheet using a belt fixing device of cooling and separating system. In the electrophotographic print, a specular glossiness GsP(45°) and a reflected light scattering index GsP(*45±3°) of a black print image on the toner image-bearing surface of the electrophotographic print satisfy specific conditions.
    Type: Grant
    Filed: November 5, 2003
    Date of Patent: January 10, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Ishizuka, Ashita Murai
  • Patent number: 6980763
    Abstract: To produce an electrophotographic print with high image quality and good texture and with minimized curling, a method produces an electrophotographic print by fixing a toner image on an image bearing surface of an electrophotographic image-receiving sheet using a belt fixing and smoothing apparatus including a hot-pressing device, a belt member, a cooling device, and a cooling-releasing section, smoothing the toner image, and releasing the sheet, in which an amount of curling C (mm) of the electrophotographic print is controlled to be more than ?0.10 L and less than +0.05 L, wherein L is a length (mm) of a short side of the electrophotographic print; a negative value (?) of the amount of curling C means that the electrophotographic print curls toward its back side not bearing the image; and a positive value (+) of the amount of curling C means that the electrophotographic print curls toward its image-bearing surface.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: December 27, 2005
    Assignees: Fuji Photo Film Co., Ltd., Fuji Xerox Co., Ltd.
    Inventors: Ashita Murai, Yoshio Kanesawa
  • Publication number: 20050208235
    Abstract: The object of the present invention is to provide an image-receiving sheet for the electrophotography which can form an image having excellent glossiness, a little concave and convex (relief) and a high image quality compared to that of a silver salt photograph, is excellent in adhesion resistance and shelf stability, and can mitigate an environmental load during the production thereof, and also an image-forming process using the image-receiving sheet for the electrophotography. For this object, the present invention provides an image-receiving sheet for the electrophotography comprising a support and a toner image-receiving layer disposed on the support, wherein the toner image-receiving layer comprises a thermoplastic resin which is a polyester resin having a glass transition temperature (Tg) of higher than 60° C., a number average molecular weight (Mn) of 5,000 to 12,000 and the ratio (Mw/Mn) between the weight average molecular weight (Mw) and the number average molecular weight (Mn) of 1?Mw/Mn?3.
    Type: Application
    Filed: March 15, 2005
    Publication date: September 22, 2005
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Ashita Murai, Yoshio Tani, Hiroshi Kajimaru
  • Patent number: 6920304
    Abstract: To provide an relief smoothing apparatus that smoothes an image on a recording sheet which is obtained by forming a polyolefin resin coating layer on a base sheet and forming a receiving layer, in which a toner image is infiltrated, on the base sheet, including: plural tension rolls including a first roll; an endless; a second roll; and a heating source, the recording sheet, in which provided that a surface temperature of the first roll is represented by Tn [° C.], a Vicat softening temperature of the polyolefin resin is represented by Tv [° C.], and a time required for the recording sheet to pass through the nip portion is represented by t [sec], the following relationship is established: (Tv+55)×(1+{fraction (1/100)} t)?Tn?(Tv+20)/(1+{fraction (1/100)} t) [° C.].
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: July 19, 2005
    Assignees: Fuji Xerox Co., Ltd., Fuji Photo Film Co., Ltd.
    Inventors: Yoshio Kanesawa, Ashita Murai
  • Publication number: 20050025540
    Abstract: An image forming apparatus includes a forming unit configured to form a latent electrostatic image on a latent electrostatic image bearing member based on a digital image; a developing unit configured to develop the latent electrostatic image with a toner to form a visible image; a transferring unit configured to transfer the visible image to one of an electrophotographic image receiving roll and an electrophotographic image receiving sheet; and a smoothing and fixing unit configured to smooth and fix the transferred image on one of the electrophotographic image receiving roll and the electrophotographic image receiving sheet to thereby form a series of electrophotographic prints and an electrophotographic print. In the apparatus, the hardware including the media, printer and unit for aftertreatment optimally matches with the toner, and the apparatus can produce high-quality images equal to silver-halide photographs.
    Type: Application
    Filed: July 28, 2004
    Publication date: February 3, 2005
    Inventors: Ashita Murai, Kazuhito Miyake, Hiroshi Nagate, Hiroshi Ishizuka, Yoichi Nakamura, Kenichi Saito, Hiroaki Nakamura, Eiichi Kito