Patents Assigned to Mitsubishi Pencil Co., Ltd.
  • Patent number: 7806615
    Abstract: A chuck (4) for grasping a writing lead and a rotor (6) arranged to be movable in a direction of rotation and an axial direction within a body cylinder (1). A rotational drive mechanism for the writing lead is formed such that first and second cam faces (6a) and (6b) are respectively formed at one end face and another end face of the rotor in the axial direction, and first and second fixed cam faces (13a) and (14a) are arranged on the body cylinder side to face the above-mentioned first and second cam faces respectively. A pipe end (7) for guiding the writing lead to interlock with retreat and forward movement of the writing lead while the writing proceeds is arranged to move in the same direction, in conjunction with retreat and forward movement of the above-mentioned chuck.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: October 5, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Hirotake Izawa, Takeshi Kobayashi, Kyo Nakayama
  • Patent number: 7802936
    Abstract: A chuck (4) for grasping a writing lead and a rotor (6) arranged to be movable in a direction of rotation and an axial direction within a body cylinder (1). A rotational drive mechanism for the writing lead is formed such that first and second cam faces (6a) and (6b) are respectively formed at one end face and another end face of the rotor in the axial direction, and first and second fixed cam faces (13a) and (14a) are arranged on the body cylinder side to face the above-mentioned first and second cam faces respectively. An indicator (6c) of a wedge-shaped notch is formed at a part of the rotor. The indicator can be observed through the body cylinder made of a transparent material. By this structure, a mechanical pencil is provided in which operation of the writing lead that is gradually rotated by way of writing pressure can be known certainly.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: September 28, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Hirotake Izawa, Takeshi Kobayashi, Kyo Nakayama
  • Publication number: 20100239351
    Abstract: A chuck (4) for grasping a writing lead and a rotor (6) arranged to be movable in a direction of rotation and an axial direction within a body cylinder (1) are provided. By axial movement of the rotor in conjunction with writing operation, the rotor rotates and the writing lead is also subjected to rotational movement. The writing lead can be inched out of the chuck by way of knock operation of the knock cover (26) arranged at a rear end port ion of the body cylinder. A separation part having a gap (G) is formed at any location along a knock operation transmitting path between the above-mentioned knock cover and the above-mentioned chuck, the separation part transmits the above-mentioned knock operation to the above-mentioned chuck and inhibits rotation operation from being transmitted. According to the above-mentioned structure, as the rotor and the knock cover are separated in a direction of rotation, it is possible to solve the problem of placing an obstacle to a rotational drive mechanism.
    Type: Application
    Filed: October 15, 2008
    Publication date: September 23, 2010
    Applicant: MITSUBISHI PENCIL CO., LTD.
    Inventors: Hirotake Izawa, Takeshi Kobayashi, Kyo Nakayama
  • Patent number: 7799847
    Abstract: Provided is a water-based ink composition for a writing instrument comprising at least a colorant and water, characterized by comprising an alkylene oxide-added glycerin ester in which a principal skeleton is glycerin and 60 to 150 moles of alkylene oxide is added thereto and in which the glycerin is ester-bonded with a carboxylic acid-containing substance in an amount of 0.1 to 30% by weight based on the total amount of the ink composition.
    Type: Grant
    Filed: January 24, 2006
    Date of Patent: September 21, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Hideyuki Ikoma, Yusuke Kobayashi
  • Publication number: 20100232863
    Abstract: A chuck (4) for grasping a writing lead and a rotor (6) arranged to be movable in a direction of rotation and an axial direction within a body cylinder (1) are provided. A rotational drive mechanism for the writing lead is formed such that first and second cam faces (6a) and (6b) are respectively formed at one end face and another end face of the rotor in the axial direction, and first and second fixed cam faces (13a) and (14a) are arranged on the body cylinder side to face the above-mentioned first and second cam faces respectively. A pipe end (7) for guiding the writing lead to interlock with retreat and forward movement of the writing lead while the writing proceeds is arranged to move in the same direction, in conjunction with retreat and forward movement of the above-mentioned chuck.
    Type: Application
    Filed: October 15, 2008
    Publication date: September 16, 2010
    Applicant: MITSUBISHI PENCIL CO., LTD.
    Inventors: Hirotake Izawa, Takeshi Kobayashi, Kyo Nakayama
  • Publication number: 20100230833
    Abstract: A liquid cartridge comprises a vessel body for containing liquid, the vessel body comprising a plurality of surfaces, an oxygen outlet provided on one surface among the plurality of surfaces of the vessel body, and an oxygen input provided on a surface other than a furthest surface from the surface on which the oxygen outlet is formed among the plurality of surfaces of the vessel body.
    Type: Application
    Filed: March 20, 2007
    Publication date: September 16, 2010
    Applicants: Casio Computer Co., Ltd., Mitsubishi Pencil Co., Ltd.
    Inventors: Yasunari Kabasawa, Toshimi Kamitani, Kiyoshi Fujisawa
  • Patent number: 7794533
    Abstract: The present invention provides an ink composition containing an olefinic wax dispersion added so as to impart smooth writing properties without causing starving at the starting of writing, and the ink composition has noticeably improved stability over time. The present invention provides an oil-based ink composition comprising a solvent selected from the group consisting of a monohydric alcohol, a polyhydric alcohol and glycol ether, and a colorant selected from the group consisting of a pigment, a dye, and a mixture of the pigment and the dye, the oil-based ink composition further comprising a dispersion of reprecipitated olefinic wax particles.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: September 14, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Shuji Ichikawa
  • Publication number: 20100221204
    Abstract: Provided is a liquid cosmetic comprising at least an inorganic pigment, a dispersant, a film forming agent and water, wherein the dispersant is a homopolymer or a copolymer obtained by polymerizing a raw material monomer of at least one compound selected from acrylic acid, methacrylic acid or (C1 to C4 and C8) alkyl esters thereof, and the film forming agent comprises an emulsion of a homopolymer (excluding a homopolymer comprising only polystyrene) or a copolymer obtained by polymerizing a raw material monomer of at least one compound selected from acrylic acid, methacrylic acid, (C1 to C4 and C8) alkyl esters thereof or styrene.
    Type: Application
    Filed: January 19, 2007
    Publication date: September 2, 2010
    Applicant: MITSUBISHI PENCIL CO., LTD.
    Inventors: Masaaki Morita, Hiroshi Sato
  • Patent number: 7771890
    Abstract: The fuel reservoir for a fuel cell is a fuel reservoir detachably connected with a fuel cell main body, and it is equipped with a fuel-storing vessel of a tube type for storing a liquid fuel and a fuel discharge part; the fuel discharge part is provided with a valve for sealing communication between the inside and the outside of the above fuel-storing vessel. The valve assumes a structure in which a slit is formed in an elastic material and a structure in which a valve member is pressed by a resilient body, and is opened by inserting a fuel-supplying member.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: August 10, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Takahiro Osada, Yoshihisa Suda, Toshimi Kamitani, Kunitaka Yamada, Kouji Nishimura
  • Publication number: 20100192966
    Abstract: A process for producing a liquid container that is good in a gas barrier property, transparency, and water repellency. The process includes molding a resin composition comprising: (a) 100 parts by weight of a polyolefin resin; (b) 3 to 40 parts by weight of at least one resin selected from the group consisting of hydrogenated terpene resins, petroleum resins, and hydrogenated petroleum resins; and (c) 0.03 to 5 parts by weight of at least one component selected from the group consisting of silicone oils, fluorosurfactants, and paraffin oils, with their viscosities being 20 to 3000 cSt at 25° C., as determined according to JIS Z 8803.
    Type: Application
    Filed: April 9, 2010
    Publication date: August 5, 2010
    Applicant: MITSUBISHI PENCIL CO., LTD.
    Inventors: Satoshi Takahashi, Hisami Tamano, Takeshi Kobayashi, Hideyuki Ikoma, Kenichiro Tachi
  • Publication number: 20100166486
    Abstract: A chuck unit (4) for grasping a writing lead (10) and a rotor (6) arranged to be movable in a direction of rotation and an axial direction within a body cylinder (1) are provided. First and second cam faces (6a) and (6b) are respectively formed at one end face and another end face of the rotor in the axial direction, and first and second fixed cam faces (13a) and (17a) are arranged on the body cylinder side to face the first and second cam faces respectively. The first cam face in the rotor is brought into abutment with and meshed with the first fixed cam face by retreat operation of the chuck unit under writing pressure, and the second cam face in the rotor is brought into abutment with and meshed with the second fixed cam face by releasing the writing pressure, so that the rotor rotates, whereby the writing lead also rotates.
    Type: Application
    Filed: December 11, 2009
    Publication date: July 1, 2010
    Applicant: MITSUBISHI PENCIL CO.,LTD.
    Inventors: Hirotake Izawa, Takeo Fukumoto, Noio Ohsawa, Kyo Nakayama, Yoshitoshi Osano
  • Patent number: 7740971
    Abstract: In order to provide a separator for a fuel cell which is improved in cell characteristics by controlling a wetting property of the separator for a fuel cell and a production process for the same, assumed is a constitution in which in a separator A for a fuel cell molded from at least from a carbon material, a hydrophilic functional group is formed and increased on a surface part of a flow passage surface 11 in the separator 10 by irradiation treatment of a YAG laser apparatus 20 and in which an uneven part having an average surface roughness Ra of less than 50 ?m is formed.
    Type: Grant
    Filed: August 7, 2006
    Date of Patent: June 22, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Noboru Kanba, Yoshihisa Suda
  • Patent number: 7727657
    Abstract: A fuel reservoir for a fuel cell detachably connected with a fuel cell main body is constituted from a fuel storing vessel of a tube type for storing a liquid fuel, a fuel discharge part and a follower which seals the liquid fuel and moves as the liquid fuel is consumed at the rear end of the liquid fuel. The inside of the fuel storing vessel includes a fuel storing chamber at least hermetically sealed with the follower and a pressurizing chamber filled with a means for pressing the follower staying in a state in which it is completely separated from the ambient air and hermetically sealed. The fuel reservoir for a fuel cell makes it possible to prevent boiling, bubbling and spouting of the liquid fuel and to stably supply the liquid fuel directly to a fuel cell main body.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: June 1, 2010
    Assignees: Mitsubishi Pencil Co., Ltd., Casio Computer Co., Ltd.
    Inventors: Toshimi Kamitani, Yasunari Kabasawa
  • Publication number: 20100099000
    Abstract: This invention provides a separator for a fuel battery, which has been improved in battery properties by controlling the wettability of the separator for a fuel battery, and a process for producing the same. The separator for a fuel battery is a separator (A) for a fuel battery, comprising at least a carbon material, and a concave-convex part, which, upon irradiation treatment with a YAG laser device (20), forms and increases hydrophilic functional groups and, at the same time, provides an average surface roughness Ra of less than 50 ?m, is provided on the surface part of a flow passage face (11) in the separator (10).
    Type: Application
    Filed: August 7, 2006
    Publication date: April 22, 2010
    Applicant: MITSUBISHI PENCIL CO., LTD.
    Inventors: Noboru Kanba, Yoshihisa Suda
  • Patent number: 7687178
    Abstract: A liquid fuel is contained in a fuel container, and the liquid fuel is discharged from a fuel outlet. Further, a water is contained in a water containing pipe provided in the fuel container, and the water is discharged from a water outlet to the outside. Air taken into the fuel container through a dustproof filter attached to a rear lid portion of the fuel container is discharged to the outside from an oxygen source outlet through an oxygen source pipe. The fuel outlet, oxygen source outlet and water outlet are provided in a front outer surface of the front lid portion.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: March 30, 2010
    Assignees: Casio Computer Co., Ltd., Mitsubishi Pencil Co., Ltd.
    Inventors: Yasunari Kabasawa, Yoshihisa Suda, Kozi Nishimura, Takahiro Osada, Toshimi Kamitani
  • Patent number: 7654763
    Abstract: A chuck unit (4) for grasping a writing lead (10) and a rotor (6) arranged to be movable in a direction of rotation and an axial direction within a body cylinder (1) are provided. First and second cam faces (6a) and (6b) are respectively formed at one end face and another end face of the rotor in the axial direction, and first and second fixed cam faces (13a) and (17a) are arranged on the body cylinder side to face the first and second cam faces respectively. The first cam face in the rotor is brought into abutment with and meshed with the first fixed cam face by retreat operation of the chuck unit under writing pressure, and the second cam face in the rotor is brought into abutment with and meshed with the second fixed cam face by releasing the writing pressure, so that the rotor rotates, whereby the writing lead also rotates.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: February 2, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Hirotake Izawa, Takeo Fukumoto, Norio Ohsawa, Kyo Nakayama, Yoshitoshi Osano
  • Patent number: 7641412
    Abstract: A ball-point pen, wherein a cover member (6) is fitted to a joint member (3) connecting a writing tip (1) rotatably supporting a writing ball (2) at the tip thereof to an ink storage tube. When the cover member (6) is fitted to the joint member (3) along the outer peripheral surface thereof, a part of the cover member does not come within 0.2 mm (within the range of the chain double-dashed line) from around the writing tip. Thus, even if the accuracies of parts and assembly machines are dispersed, a problem with an existing ball-point pen wherein a cover member is brought into contact with a writing tip and the writing tip is damaged in an assembly step can be avoided.
    Type: Grant
    Filed: February 16, 2005
    Date of Patent: January 5, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Koichi Hirano
  • Publication number: 20090283033
    Abstract: A liquid applicator includes a liquid pressing mechanism (liquid pressing means) for pressurizing an application liquid inside a main body so as to supply application liquid to an applying member by the pressing of the liquid pressing mechanism. The applying member is made of an elastic material and is formed with a communication path of a passage hole for communication between the inside and outside of main body, and an applying portion of the applying member is formed projected further forward from an ejection opening of communication path. The liquid applicator that can simply apply an application liquid, even it is high in viscosity, over a wide area.
    Type: Application
    Filed: November 9, 2006
    Publication date: November 19, 2009
    Applicant: Mitsubishi Pencil Co., Ltd.
    Inventors: Tetsuaki Akaishi, Hiroaki Koyama
  • Patent number: 7615305
    Abstract: In order to provide a fuel reservoir for a small-sized fuel cell which is suitably used as an electric power source for portable electronic appliances such as cellular phones, note type personal computers and PDA, assumed is a structure in which a fuel reservoir for a fuel cell detachably connected with a fuel cell main body is equipped with a fuel-storing vessel for storing a liquid fuel, a fuel discharge part and a follower which seals the liquid fuel and moves as the liquid fuel is consumed and into which a follower auxiliary member is inserted at a rear end of the liquid fuel, wherein the follower auxiliary member has no fluidity and is insoluble in the liquid fuel, and it has a cross-sectional area of 50% or more based on a cross-sectional area of the fuel-storing vessel in a diameter direction.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: November 10, 2009
    Assignees: Mitsubishi Pencil Co., Ltd., Casio Computer Co., Ltd.
    Inventors: Yoshihisa Suda, Takahiro Osada, Kouji Nishimura, Toshimi Kamitani, Kunitaka Yamada, Yasunari Kabasawa
  • Publication number: 20090274938
    Abstract: The fuel reservoir for a fuel cell is a fuel reservoir detachably connected with a fuel cell main body, and it is equipped with a fuel-storing vessel of a tube type for storing a liquid fuel and a fuel discharge part; the fuel discharge part is provided with a valve for sealing communication between the inside and the outside of the above fuel-storing vessel. The valve assumes a structure in which a slit is formed in an elastic material and a structure in which a valve member is pressed by a resilient body, and is opened by inserting a fuel-supplying member.
    Type: Application
    Filed: July 17, 2009
    Publication date: November 5, 2009
    Applicant: Mitsubishi Pencil Co., Ltd.
    Inventors: Takahiro OSADA, Yoshihisa Suda, Toshimi Kamitani, Kunitaka Yamada, Kouji Nishimura