Patents by Inventor Yasusuke Tohi

Yasusuke Tohi 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: 4444386
    Abstract: An electrostatic copying apparatus in which the paper is fed from a cassette. The cassette has a casing for a stack of sheet-like copying papers of at least two different sizes, said casing being a box-like housing having an open top, a closure plate mounted detachably on the top surface of the housing and having at least one display window, and at least two restricting members mounted in spaced-apart relation in the longitudinal direction of the cassette casing so that they can pivot about the axial line of the cassette casing extending in the transverse direction of the cassette casing, each of the restricting members having a restricting portion for restricting the rear end of copying papers to be accommodated in the housing and a display portion having an indication of the size of copying papers, the display portion being positioned adjacent to the display window when the restricting portion is brought to its operative position beneath the closure plate.
    Type: Grant
    Filed: August 25, 1981
    Date of Patent: April 24, 1984
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Naoaki Murata, Masahiro Yoshioka, Kiyoshi Hayashi, Yasusuke Tohi
  • Patent number: 4390264
    Abstract: An electrostatic copying apparatus of the type in which an original to be copied is scanned and exposed to light by moving one of an original-support having a transparent plate for placing the original thereon and an optical system relative to the other, and paper feed rollers are rotated in regard to the movement of one of the original-supports and the optical system thereby supplying a copying paper, and a drive mechanism for reciprocating one of the original-supports and the optical system has a driven wheel and an idle wheel rotatably disposed in a spaced-apart relation to each other and a winding power transmission system wound about these wheels and drivingly connected to one of the original-supports and the optical system; wherein a synchronizing wheel is rotatably disposed adjacent to, and coaxially with, one of the driven wheel and the idle wheel of the drive mechanism, an engaging protrusion is fixed to the winding power transmission system, a plurality of engaging portions capable of cooperating wi
    Type: Grant
    Filed: August 25, 1981
    Date of Patent: June 28, 1983
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Naoaki Murata, Masahiro Yoshioka, Kiyoshi Hayashi, Yasusuke Tohi
  • Patent number: 4380196
    Abstract: A plate for lithography or offset printing comprising a flexible substrate and a water-resistant coating layer formed on the flexible substrate, said water-resistant coating layer being composed of a water-insoluble resin binder and an inorganic pigment dispersed in said binder, and the water-resistant coating layer including an oleophilic ink-supporting portion composed of particles consisting essentially of at least one member selected from triiron tetroxide and .gamma.-type diiron trioxide, the particles being embedded in at least a part of the surface of the coating layer, and an etched hydrophilic ink-repelling portion composed of the inorganic pigment.
    Type: Grant
    Filed: April 15, 1977
    Date of Patent: April 19, 1983
    Assignee: Mita Industrial Company Limited
    Inventors: Yoshiaki Kato, Akira Fushida, Yasuo Ueda, Yasusuke Tohi, Tatsuo Aizawa
  • Patent number: 4325626
    Abstract: An electrostatic copying apparatus of the type in which a rotary drum having a photosensative member on its surface is rotatably and detachably disposed at a predetermined location within a housing. The apparatus has a pair of inner side plates spaced apart from each other in the direction of the central axial line of rotation of said rotary drum, a guide and support member mounted at a predetermined location on the inside surface of each of said said plates, and formed in each said guide and support member, a bearing hole having a recess opened in a direction substantially perpendicular to said central axial line of rotation and at least one guide surface extending from said recess of said bearing hole in a direction substantially perpendicular to said central axial line of rotation.
    Type: Grant
    Filed: December 3, 1979
    Date of Patent: April 20, 1982
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Naoaki Murata, Masahiro Yoshioka, Kiyoshi Hayashi, Yasusuke Tohi
  • Patent number: 4259008
    Abstract: Improvements are provided in and relating to an electrostatic copying apparatus including a housing, a support for supporting an original to be copied, the support being mounted on the housing and having a transparent plate for supporting the original thereon and a holding member for covering the original on the transparent plate, a system for forming a copied image disposed within the housing and having an optical system for projecting the image of the original on the transparent plate, and a system for transferring a copying paper synchronously with the scanning of the original which is effected by the relative movement of the original holder and the optical system.
    Type: Grant
    Filed: April 10, 1979
    Date of Patent: March 31, 1981
    Assignee: Mita Industrial Company, Ltd.
    Inventors: Ryutaro Yamagata, Sohei Matsuo, Shigeo Koyama, Nobuhiko Kozuka, Yasusuke Tohi, Tatsuo Aizawa
  • Patent number: 4168165
    Abstract: An electrophotographic photosensitive material suitable for offset printing and lithography comprising a flexible substrate, an electroconductive back coat layer formed on one surface of the substrate, an electroconductive intermediate layer formed on the other surface of the substrate and a photoconductive layer formed on the intermediate layer, said photoconductive layer being composed of a fine powder of a photoconductor dispersed in an electrically insulating resin, wherein said intermediate layer is composed of a composition comprising (A) an acrylic resin, (B) a vinyl acetate polymer having a degree of polymerization of 100 to 1700 and (C) a resinous conducting agent, in said composition the weight ratio of acrylic resin (A)/vinyl acetate polymer (B) is in the range of 4/1 to 10/1 and the amount of the conducting agent (C) is 20 to 100 parts by weight per 100 parts by weight per 100 parts by weight of the sum of the components (A) and (B), said intermediate layer has such a multi-layer distribution stru
    Type: Grant
    Filed: May 5, 1977
    Date of Patent: September 18, 1979
    Assignee: Mita Industrial Company Limited
    Inventors: Yoshiaki Kato, Akira Fushida, Yasuo Ueda, Yasusuke Tohi, Tatsuo Aizawa