Patents by Inventor Toru Matsumoto

Toru Matsumoto 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: 5782871
    Abstract: A sampling device of the suction effusion fluid that is good in sampling operation efficiency. This device includes a cell with a vacuum suction port and a skin suction port, a slide valve formed in the cell, and fluid reservoirs formed in the valve. The slide valve is movable in a plane approximately parallel to the skin surface. The slide valve opens or closes a communication path communicating the skin suction port with the vacuum suction port. Each of the fluid reservoirs is alternately communicated with the skin suction port and the vacuum suction port through the communication path by sliding movement of the slide valve. Each of the fluid reservoirs stores an effusion fluid acquired from the skin surface by vacuum suction through the skin suction port. When the slide valve is located at a position where one of the fluid reservoirs is communicated with the skin suction port and the vacuum suction port, at least one of the remaining fluid reservoirs is exposed to the outside of the cell.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: July 21, 1998
    Assignee: NEC Corporation
    Inventors: Hidetaka Fujiwara, Toru Matsumoto
  • Patent number: 4954844
    Abstract: Disclosed is an apparatus for forming a color image on a photoreceptor, in which along the rotation direction of the photoreceptor there are provided an imagewise exposure process to form a latent image, a development process including a plurality of developing devices to form a color toner image, each of the plural developing devices having a toner hopper, and a transfer process to transfer the formed color toner image onto a copy paper. The apparatus comprises a housing for including at least the photoreceptor, the plural developing devices and the plural toner hopper as one unit, and a support guide for supporting the housing to be movable in the axial direction of the photoreceptor so that the unit is attached to and detached from the apparatus.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: September 4, 1990
    Assignee: Konica Corporation
    Inventors: Shizuo Morita, Toru Matsumoto, Masayuki Kamegamori, Kazushi Hayakawa, Noboru Hatakeyama, Shunji Matsuo, Masakazu Fukuchi
  • Patent number: 4888264
    Abstract: A mixture of a colorant, and a binder compound having an aliphatic hydrocarbon long chain and having a relatively low melt viscosity, is kneaded in a molten state in the presence of solid media such as balls or beads to form a uniform mixture in which the colorant particles or aggregates have been disintegrated to a size of 5 .mu. or below. Solid particles which may be used as a toner are formed from the uniform mixture and may be encapsulated, as desired, to provide a capsule toner.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: December 19, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Matsumoto, Toshiyuki Koshio, Yasuhide Goseki, Hisayuki Ushiyama, Masuo Yamazaki, Ichiro Ohsaki, Toshiaki Nakahara, Junichi Kurimoto, Katsutoshi Wakamiya
  • Patent number: 4740443
    Abstract: An encapsulated toner for development of electrical latent images comprises a core particle containing a colorant and a soft solid material, inorganic fine particles attached to the vicinity of the surface of the core particle, and a shell coating the core particle and the inorganic fine particles. The inorganic fine particles function to, e.g., reinforce the encapsulated toner with a thin shell and may be attached to the core particles through dry-mixing. The core particles with the attached inorganic particles may be coated with a shell resin through phase separation.
    Type: Grant
    Filed: August 20, 1987
    Date of Patent: April 26, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiaki Nakahara, Junichi Kurimoto, Yasuhide Goseki, Toshiyuki Koshio, Hisayuki Ochi, Hisayuki Ushiyama, Toru Matsumoto, Ichiro Ohsaki, Katsutoshi Wakamiya, Masuo Yamazaki
  • Patent number: 4661430
    Abstract: A developing method, which comprises arranging a latent image-bearing member which bears a latent image on the surface and a toner-carrying member which carries an insulating non-magnetic toner at the developing section with a certain gap provided therebetween, coating the toner-carrying member with the insulating non-magnetic toner, conveying the resultant coated layer to the developing section while regulating the thickness thinner than said gap and developing the latent image on the latent image-bearing member under the application of an alternate electric field on the toner. Since the toner has a form of a microcapsule comprising a soft core material and a hard shell material and also contains a colorant in addition to the core material, adequate discharging can be effected during triboelectric charging to give an image with a constant density through stably charged state.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: April 28, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsutoshi Wakamiya, Toru Matsumoto, Masuo Yamazaki
  • Patent number: 4656111
    Abstract: A pressure-fixable toner comprising a combination of a compound A having a hydrocarbon chain and a compound B having an amino group in addition to a hydrocarbon chain is excellent in dispersibility of colorant, pressure fixing characteristic and developing characteristic. Further, an encapsulated pressure-fixable toner comprising a core of the pressure-fixable toner particles and a shell encapsulating the core is also excellent in these properties.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: April 7, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsutoshi Wakamiya, Toru Matsumoto, Masuo Yamazaki
  • Patent number: 4626490
    Abstract: A core material comprising a binder mixture of a long chain organic compound and an ester of a higher alcohol and a higher carboxylic acid is encapsulated with a thin shell material to give an encapsulated toner. The encapsulated toner has a uniform structure and a narrow particle size distribution and is excellent in developing and fixation characteristics, when used in electrophotography, etc.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: December 2, 1986
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masuo Yamazaki, Katsutoshi Wakamiya, Toru Matsumoto, Ichiro Ohsaki, Toshiaki Nakahara, Hisayuki Ushiyama
  • Patent number: 4610944
    Abstract: A process for producing a toner, comprising the steps of suspending a molten mixture of starting materials of a binder containing a compound having a hydrocarbon chain and a colorant in an aqueous dispersing medium in the presence of a hardly water-soluble fine powdery inorganic dispersant, cooling the dispersed particles, and recovering the cooled particles.
    Type: Grant
    Filed: January 3, 1984
    Date of Patent: September 9, 1986
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Matsumoto, Masuo Yamazaki, Katsutoshi Wakamiya
  • Patent number: 4590142
    Abstract: A capsule toner, comprising core particles of a core material exhibiting a cloud point within the range of from 30 to 90 and a penetration within the range of from 2 to 15, and a shell material coating the core particles. The capsule toner is preferably formed by dispersing the core particles in solution of the shell material in a good solvent for the shell material, and then adding a poor solvent for the shell material to cause the deposition of the shell material on the core particles.
    Type: Grant
    Filed: August 29, 1984
    Date of Patent: May 20, 1986
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masuo Yamazaki, Toru Matsumoto, Katsutoshi Wakamiya, Ichiro Ohsaki, Toshiaki Nakahara, Hisayuki Ushiyama
  • Patent number: 4581312
    Abstract: A pressure-fixable capsule toner for electrophotography having characteristics such as good combination of fixability and durability and also a stable charge controlling characteristic is provided. The core materials typically are of polyethylene or paraffin wax. The shell material is a vinyl polymer characterized by low molecular weight distribution represented by a ratio of weight-average molecular weight/number average molecular weight of not larger than 3.5. The vinyl polymer is preferably a copolymer of styrene or a derivative thereof and a tertiary amino-group containing vinyl monomer.
    Type: Grant
    Filed: August 28, 1984
    Date of Patent: April 8, 1986
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiaki Nakahara, Ichiro Ohsaki, Masuo Yamazaki, Katsutoshi Wakamiya, Toru Matsumoto, Hisayuki Ushiyama
  • Patent number: 4430409
    Abstract: As a developer for developing electrostatic images in electrophotography, electrostatic recording, electrostatic printing, etc., there is employed a developer containing a finely divided silicic acid which is a finely divided silicic acid synthesized by a wet process and has a pH value of 6 to 11 when suspended at a concentration of 4% by weight in distilled water and the developer can be positively charged strongly and uniformly to visualize the negative electrostatic images, giving a high quality image.
    Type: Grant
    Filed: July 29, 1983
    Date of Patent: February 7, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Matsumoto, Masanori Takenouchi
  • Patent number: 4373469
    Abstract: An apparatus for developing electrostatic latent images includes an applicator for applying a developer, containing a high concentration of developer particles, uniformly over both the image and non-image areas of a latent image bearing surface, and a developing device including a liquid reservoir and an elastic roller including a core shaft, a porous elastic inner layer on the core shaft, and a flexible and permeable sleeve-like net covering the inner layer. Liquid from the reservoir is applied by the roller to the image bearing surface to remove developer particles not attracted thereto by coulomb force to thereby form the developed image. Marginal effect in the developed image is eliminated by making at least one of the inner layer or net electrically conductive.
    Type: Grant
    Filed: January 30, 1981
    Date of Patent: February 15, 1983
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsukasa Kuge, Toru Matsumoto, Tsuyoshi Watanabe, Yasuyuki Tamura
  • Patent number: 4299902
    Abstract: An image forming process including a step of developing an electrostatic image by supplying a liquid developer to a surface holding said image thereon, which comprises conducting said development when a liquid developer supply member capable, upon elastic deformation thereof, of squeezing out and absorbing said liquid developer is brought into pressure contact with said image-holding surface, and, when said development is not performed, separating said supply member from said surface and maintaining said supply member in a state wetted with said liquid developer. And also an image forming apparatus which is adapted for use in such process.
    Type: Grant
    Filed: July 18, 1978
    Date of Patent: November 10, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ikuo Soma, Tamotu Magome, Toru Matsumoto
  • Patent number: 4237592
    Abstract: An elastic roller for use in an image forming apparatus comprises a rigid shaft member, an internal layer provided around said shaft member with a determined thickness and consisting of a porous elastic member containing therein pores for holding liquid, and an external layer covering said internal layer and consisting of a flexible liquid-permeating member provided with a number of through holes, said roller being provided with a means for applying a tension to said external layer in the axial direction of said roller.
    Type: Grant
    Filed: June 5, 1978
    Date of Patent: December 9, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsukasa Kuge, Tsuyoshi Watanabe, Toru Matsumoto
  • Patent number: 4185129
    Abstract: A method for developing electrostatic latent images comprises a first step of supplying uniformly a developer containing developing particles onto an electrostatic latent image carrying surface and a second step of supplying liquid onto the latent image carrying surface to remove any excess developer from the surface while leaving on the surface only such developing particles that are able to be retained as a result of the relative attraction between the developing particles and the electrostatic latent image so as to visualize the latent image. Apparatus for carrying out the method comprises a developing particle applying means and a liquid supplying means. The developing particle applying means is disposed to effect a uniform adhesion of developing particles onto an electrostatic latent image carrying surface.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: January 22, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsukasa Kuge, Toru Matsumoto, Tsuyoshi Watanabe, Yasuyuki Tamura