Patents by Inventor Takuro Nishimura

Takuro Nishimura 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: 20090127736
    Abstract: A casting film is formed by releasing a casting dope onto a moving circumferential surface. The casting film is cooled to obtain self supporting property. A peel roller peels the casting film as a primary wet film and sends the primary wet film to a transfer section. Through the transfer section and the like, the primary wet film is guided to a first drying chamber where a wet gas containing water vapor is blown onto the primary wet film. Water molecules are absorbed in the primary wet film. Absorption of the water molecules in the primary wet film promotes diffusion of the constituent compounds contained in the primary wet film, which facilitates release of constituent compounds.
    Type: Application
    Filed: November 14, 2008
    Publication date: May 21, 2009
    Inventors: Takuro NISHIMURA, Hidekazu Yamazaki
  • Publication number: 20090085244
    Abstract: A dope containing a TAC and solvent is prepared in a dope producing apparatus. In a case where a new dope having components different from that of the dope described above is produced, a controlling device performs controlling such that an operation of each pump is stopped, each valve is set to a closing position, and a hopper stops supplying the TAC. Thereafter, a washing liquid is introduced into the respective devices of the dope producing apparatus. The dope remained in the respective devices are discharged as a waste liquid together with the washing liquid. The waste liquid is heated in dry gas until a liquid level of the waste liquid turns into a falling-rate drying state in a dry heating chamber provided in a solvent removing device. In a wet heating chamber, the waste liquid is heated in wet gas.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 2, 2009
    Inventors: Yukihiro Katai, Takuro Nishimura
  • Publication number: 20090057954
    Abstract: A casting dope is cast onto a moving peripheral surface to form a casting film. The casting film is cooled to be hardened or solidified. The casting film is peeled from the peripheral surface by a peeling roller to form a primary wet film. The primary wet film is transported to a transfer section. The primary wet film is sent from the transfer section to a first drying chamber. Wet gas containing water vapor is applied to the primary wet film in the first drying chamber. Water molecules are absorbed into the primary wet film. The water molecules absorbed into the primary wet film expand meshes of network structure of polymer molecules of the primary wet film. The diffusion of liquid compounds contained in the primary wet film is accelerated. Thus, the elimination of the liquid compounds can be facilitated.
    Type: Application
    Filed: September 3, 2008
    Publication date: March 5, 2009
    Applicant: FUJIFILM Corporation
    Inventors: Takuro NISHIMURA, Hidekazu Yamazaki, Yukihiro Katai, Takao Taguchi
  • Publication number: 20090057943
    Abstract: In a solution casting apparatus, polymer dope containing cellulose ester and solvent is cast to form cellulose ester film continuously. A filtration device has a precoat of a filter aid deposited on a filter screen, for filtering polymer dope to be cast. A washer washes the filtration device after discontinuing supply of the polymer dope to the filtration device. A filter regenerating device deposits a precoat of the filter aid in the washed filtration device by use of precoat solution containing the filter aid, the polymer dope and solvent. A drain line drains the precoat solution from the filtration device after depositing the precoat. The filtration device is charged with solvent saturated gas upon draining. A valve mechanism changes over plural filtration devices, to manage the filtration device among the filtration devices in the washer, the filter regenerating device and the drain line.
    Type: Application
    Filed: September 2, 2008
    Publication date: March 5, 2009
    Applicant: FUJIFILM Corporation
    Inventors: Takuro Nishimura, Hidekazu Yamazaki
  • Publication number: 20080230946
    Abstract: A primary dope containing a polymer, a solvent and an additive is fed to a filtration device in a filtrating unit. The filtration device includes a filter on which a deposit layer of a filtration aid is formed, and impurities in the primary dope are adsorbed to the deposit layer. After the filtration, a residue containing the impurities and the filtration aid on the filter, and the filtration device is filled a cleaning liquid. Then a stirrer in the filtration device is stirred so as to disperse the residue to the cleaning liquid. Thus a slurry liquid is obtained and fed to a separation device. In the separation device, the slurry liquid is fed into a strainer to separate the slurry liquid to the residue and the liquid material. The residue is dried in a drying device and the solvent vapor is recovered.
    Type: Application
    Filed: March 22, 2008
    Publication date: September 25, 2008
    Applicant: FUJIFILM CORPORATION
    Inventors: Takuro NISHIMURA, Takashi SASAKI, Ryutaro KEMMOTSU, Hidekazu YAMAZAKI
  • Patent number: 7410605
    Abstract: The solution film-forming method is provided in which the absolute filtration accuracy for a cellulose acylat solution can be improved and filtration throughput can be increased without reducing the pore size of a filtering material. A dope stock solution to be filtrated is first introduced into a body feed tank and a filter aid from a filter aid tank is added and dispersed. As the filter aid, an aid including SiO2 in 50% or more and a cellulose-based aid are mixed for use. The dope stock solution in which the filter aid is dispersed is introduced into a filter machine and subjected to filtration while forming a cake on the surface of the filtering material. After the filtration, a cleaning solvent is supplied in circulation from a cleaning solvent tank, and the cake is discharged as slurry. The filter aid is separated from the slurry by a separating device and burned in a burning device. Then, a regenerated filter aid is sent to the filter aid tank.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: August 12, 2008
    Assignee: FUJIFILM Corporation
    Inventors: Takuro Nishimura, Tadahiro Tsujimoto, Yukihiro Katai
  • Publication number: 20070040295
    Abstract: A cool-dissolving apparatus for producing a solution from a mixture of polymer and solvent includes a double-structure pipe which is constructed of a cylinder and a jacket surrounding the cylinder. A mixture is fed in the cylinder, and a cooling medium flows in a space between the cylinder and the jacket oppositely to the mixture in the cylinder such that polymer dissolves to the solvent. The obtained solution is supplied in a heat-dissolving apparatus including a pipe for feeding the solution. In the heat-dissolving apparatus, the pipe extends horizontally or upwards in a feeding direction of the solution.
    Type: Application
    Filed: October 30, 2006
    Publication date: February 22, 2007
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Takuro Nishimura, Yukihiro Katai
  • Publication number: 20060118980
    Abstract: A stock solution is prepared by mixing and swelling TAC as a solute in a solvent, and is fed into an extrusion machine. The extrusion machine is cooled by a cooling medium, and is provided with twin-shaft screws. The screws are a compressing type where thread pitches of a helical flight decrease toward downstream. The screws are in mesh with each other and rotated in the same direction. Through the extrusion machine, the solute is dissolved in the solvent to form a dope. The dope is further cooled in a cooler to promote the solubility of the dope. Thereafter, the dope is heated by a heater to raise the fluidity. From the obtained dope, TAC film with excellent optical properties may be formed by a solution casting method.
    Type: Application
    Filed: December 1, 2005
    Publication date: June 8, 2006
    Inventors: Akira Yamada, Yukihiro Katai, Takuro Nishimura, Tadahiro Tsujimoto
  • Publication number: 20040259382
    Abstract: An apparatus for producing a dope includes an extrusion machine. A cooling medium flows in a jacket in periphery of a cylinder so as to perform the cooling at −45° C. (upstream side) and −70° C. (downstream side). A screw has first-third portions. The diameter is smaller in the first portion than the third portion, and becomes larger in the second portion toward the third portion. A mixture of TAC and methyl acetate is supplied into a cylinder, whose rotation feeds the mixture from the first to the second portion. Since the space between the second portion and the cylinder becomes narrower in the downstream side, the mixture is compressed and cooled at the same time, to easily dissolve the polymer to the solvent. The dope is obtained and made uniform by the third portion. Thereafter, the dope is fed to the cooler for progress of the dissolution.
    Type: Application
    Filed: June 22, 2004
    Publication date: December 23, 2004
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Takuro Nishimura, Tadahiro Tsujimoto, Yukihiro Katai
  • Publication number: 20040023051
    Abstract: The solution film-forming method is provided in which the absolute filtration accuracy for a cellulose acylat solution can be improved and filtration throughput can be increased without reducing the pore size of a filtering material. A dope stock solution to be filtrated is first introduced into a body feed tank and a filter aid from a filter aid tank is added and dispersed. As the filter aid, an aid including SiO2 in 50% or more and a cellulose-based aid are mixed for use. The dope stock solution in which the filter aid is dispersed is introduced into a filter machine and subjected to filtration while forming a cake on the surface of the filtering material. After the filtration, a cleaning solvent is supplied in circulation from a cleaning solvent tank, and the cake is discharged as slurry. The filter aid is separated from the slurry by a separating device and burned in a burning device. Then, a regenerated filter aid is sent to the filter aid tank.
    Type: Application
    Filed: July 17, 2003
    Publication date: February 5, 2004
    Applicant: Fuji Photo Film Co., Ltd.
    Inventors: Takuro Nishimura, Tadahiro Tsujimoto, Yukihiro Katai
  • Publication number: 20030185925
    Abstract: A cool-dissolving apparatus for producing a solution from a mixture of polymer and solvent includes a double-structure pipe which is constructed of a cylinder and a jacket surrounding the cylinder. A mixture is fed in the cylinder, and a cooling medium flows in a space between the cylinder and the jacket oppositely to the mixture in the cylinder such that polymer dissolves to the solvent. The obtained solution is supplied in a heat-dissolving apparatus including a pipe for feeding the solution. In the heat-dissolving apparatus, the pipe extends horizontally or upwards in a feeding direction of the solution.
    Type: Application
    Filed: March 28, 2003
    Publication date: October 2, 2003
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Takuro Nishimura, Yukihiro Katai