Patents by Inventor Hirofumi Sakaguchi

Hirofumi Sakaguchi 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: 5911928
    Abstract: A method for producing polyolefin resins granules are disclosed, which comprises extruding by using a homodirectional (co-rotating) twin-screw kneading extruder a polyolefin resin from a die nozzle having a diameter of less than 2 mm and a discharge amount per hole of 0.5-8 Kg/hr into warm water of C. which is lower than a temperature of the resin by C., and cutting the extrudate with a cutter blade in the warm water. According to this invention, uniformly dispersed compounds are obtained, and switching of a raw resin can be done speedily and economically, and further, resin granules of a desired shape can be produced.
    Type: Grant
    Filed: June 2, 1997
    Date of Patent: June 15, 1999
    Assignees: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha, Kaneka Belgium N.N.
    Inventors: Hisao Shimazu, Kenichi Senda, Hirofumi Sakaguchi, Ronald A. Smets, Van Ravestyn Pierre
  • Patent number: 4935780
    Abstract: A document feeding apparatus having both an automatic and manual feed mode. the apparatus includes a paper feeding belt for feeding documents from a stack set on a document stacker, wherein the lowermost document in the stack is fed, and a stop roller placed in contact with an upper surface of the paper feeding belt to prevent the overlapped feed of documents. Documents are fed through a common paper path in both modes. The belt and roller are commonly used in both the automatic and manual document feed modes. In the automatic document feed mode, the belt is driven while the roller is held in a non-rotational state. In the manual document feed mode, the belt is driven and the roller is driven by the belt.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: June 19, 1990
    Assignee: Konica Corporation
    Inventors: Yasushi Yamada, Tsugio Hirabayashi, Susumu Okui, Hirofumi Sakaguchi
  • Patent number: 4595279
    Abstract: A recording apparatus includes an electrostatic image support and a fixing device. The toner image formed on the electrostatic image support is transferred onto a copy paper, and the copy paper is separated from the surface of the electrostatic image support and then fed to the fixing device to fuse the toner image, for example by heat. A device is provided for distinguishing the relation in the length between the distance (A) from the separating position at which the copy paper is separated from the electrostatic image support to the fixing position of the fixing device, and the length (B) of the copy paper in the transport direction. A control device controls the relative circumferential speeds of the electrostatic image support and the copy paper transport apparatus provided inside the fixing device as a function of the distinguished relation between said lengths (A) and (B).
    Type: Grant
    Filed: October 5, 1984
    Date of Patent: June 17, 1986
    Assignee: Konishiroku Photo Ind. Co., Ltd.
    Inventors: Hiroshi Kuru, Hirofumi Sakaguchi, Takao Shiozawa
  • Patent number: 4448514
    Abstract: The slit exposure optical system for a copying machine generally includes two mirror-carrying movable tables of which one is driven at half the speed of the other. Normally each table is driven from one and the same end which means that the other end of each table must follow. If such following is not precise, aberrations in the optical system result. The present invention provides means for interconnecting the nondriver ends of the tables in such a manner that the movement of the nondriver ends will precisely follow the movement of the driver ends and aberrations are thereby avoided.
    Type: Grant
    Filed: March 31, 1982
    Date of Patent: May 15, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yozo Fujii, Hirofumi Sakaguchi, Tsugio Hirabayashi
  • Patent number: 4444488
    Abstract: In the optical system of an electrophotographic copying apparatus embodying movable mirrors, it is of the utmost importance that these mirrors be properly aligned relatively to one another. In the present invention, two of the mirrors mounted at right angles to one another on a slidable frame which moves at half the speed of another movable mirror, are mounted on that frame for slight pivotal movement. This pivotal movement is controllable to provide adjustment of errors in the optical system and when adjustment is completed the mirrors are fixed in place.
    Type: Grant
    Filed: January 5, 1982
    Date of Patent: April 24, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yozo Fujii, Kazuo Murakami, Hirofumi Sakaguchi
  • Patent number: 4432633
    Abstract: An electrophotographic reproducing apparatus in which a reproducing apparatus body unit including an electrostatic latent image receptor such as a photosensitive member and other electrophotographic treating device is assembled in advance whereas an optical scanning unit including at least a document illumination lamp, a group of mirrors and a group of focusing lenses is assembled in advance in a predetermined positional relationship to the reproducing apparatus body unit, and both the units thus assembled are jointed at predetermined reference planes to each other and so integrated that they can be driven cooperatively with each other. Said two units further include jointing device at their respective predetermined reference planes.
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: February 21, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Isao Nosaka, Hirofumi Sakaguchi, Takao Shiozawa, Yozo Fujii
  • Patent number: 4368647
    Abstract: A shock absorbed device for reciprocating a driven member includes a bidirectionally rotatable driving pulley, a pair of fixed pulleys between which the driven member is disposed, an oscillating pulley arranged between the driving and fixed pulleys, and at least a wire connecting all said pulleys. The oscillating pulley is mounted for free movement along a path from a neutral position centrally within its path in response to rotation of the driving pulley in either direction thereof.
    Type: Grant
    Filed: July 15, 1980
    Date of Patent: January 18, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventor: Hirofumi Sakaguchi
  • Patent number: 4367690
    Abstract: A fixing apparatus includes a first, heated roller and a second roller movable from spaced apart condition in their nonoperative mode into mutual pressure contact with each other for operatively fixing a toner image to a support sheet passed therebetween, and a cleaning blade maintained in continuous contact with the first roller to clean contaminating matter from its surface. In operation, the first roller is rotated through at least one full revolution prior to contact with the second roller so that residual contaminating matter can be cleaned from the first roller surface before contact with the second roller and image fixing take place.
    Type: Grant
    Filed: January 21, 1981
    Date of Patent: January 11, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Hirofumi Sakaguchi, Ken-ichi Matsumoto, Keiji Masuda
  • Patent number: 4355881
    Abstract: A recording apparatus having a roller type fixing device made up of a first roller and a second roller for fixing the image to the transfer paper. The recording apparatus has an upper guide plate placed over the transfer paper passage on the inlet side of the roller type fixing device, the upper guide plate being curved down gradually toward the front end and extending near the lower portion of the first roller. The upper guide plate has on its underside a plurality of projecting strips extending in the direction of the paper feed.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: October 26, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Noriyoshi Tarumi, Kiyoaki Kawamoto, Kenji Ueno, Hirofumi Sakaguchi
  • Patent number: 4186606
    Abstract: An apparatus for measuring a temperature comprising a temperature measuring element. Said temperature measuring element is arranged closely to a surface of an article whose temperature is to be measured, an electric property of said temperature measuring element being varied corresponding to a temperature variation, and lead wires of said temperature measuring element are arranged so as to stretch closely to and along by the surface of said article.
    Type: Grant
    Filed: April 13, 1978
    Date of Patent: February 5, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Noriyoshi Tarumi, Kenji Ueno, Hirofumi Sakaguchi
  • Patent number: 4179601
    Abstract: A roller type fixing apparatus for an electrophotographic copying machine comprising a fixing roller, a pressing roller disposed to confront and have contact with said fixing roller and a mechanism for rotating said fixing roller and press roller. At least one of said fixing roller and press roller has a peripheral surface layer portion composed of a resinous material and a low electric resistance powder incorporated therein and said peripheral surface layer portion is electrically grounded.
    Type: Grant
    Filed: June 1, 1978
    Date of Patent: December 18, 1979
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Noriyoshi Tarumi, Kenji Ueno, Hirofumi Sakaguchi