Patents Assigned to Mitsubishi Pencil Co., Ltd.
  • Patent number: 8163556
    Abstract: The invention provides a substrate suitable for cell culture observation and a method of observation using the same. Crystalline carbon such as a graphite powder is mixed into a thermosetting resin such as a furan resin, and the mixture is molded in the shape of a sheet and carbonized to produce a carbon substrate; then, a cell is made to adhere to the carbon substrate, and the cell is caused to proliferate on the carbon substrate and observed using a microscope.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: April 24, 2012
    Assignees: Mitsubishi Pencil Co., Ltd., Kaora Katoh, Hiroko Kaneko
    Inventors: Yoshihisa Suda, Kunitaka Yamada, Hiroko Kaneko, Kaoru Katoh, Harumasa Okamoto
  • Patent number: 8142091
    Abstract: A writing implement capable of eliminating troubles associated with the adoption of a grip member having an end surface inclined from a vertical surface perpendicular to a central axis of a shaft tube. The inclination angle ? of a step-facing surface 5A of the grip member 5 is made smaller than the inclination angle ? of an inclined step surface 12 of the shaft tube 10. A gap G is partially formed between the step-facing surface 5A and the inclined step surface 12 when a compressive force is not applied to the grip member 5. When the grip member 5 is compressed, the whole of the step-facing surface 5A is further inclined and comes into contact with the inclined step surface 12.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: March 27, 2012
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Yojiro Sano
  • Publication number: 20120057218
    Abstract: A liquid for electrophoretic display which makes it possible to display a black color having a low reflectance or a color having a high color saturation and a white color having a high reflectance and display them at high contrast and which inhibits coagulation of white fine particles and is excellent in stability can be prepared by using a liquid for electrophoretic display containing at least white fine particles, resin particles colored by a dye and/or a pigment and a liquid phase dispersion medium, wherein fine particles in which a difference in a refractive index from the liquid phase dispersion medium is 0 to 0.05 are contained and have an average particle diameter of 50 to 500 nm. The electrophoretic display device of the present invention is prepared by filling the liquid for electrophoretic display between a pair of substrates, and the electronic device of the present invention is characterized by mounting therein the electrophoretic display device.
    Type: Application
    Filed: March 2, 2010
    Publication date: March 8, 2012
    Applicant: MITSUBISHI PENCIL CO., LTD.
    Inventor: Yosuke Setagawa
  • Publication number: 20120039663
    Abstract: Provided are a ballpoint pen tip which can, even if ink having properties which assures that the amount of supply of the ink to the pen tip by shear of a writing ball is sufficient is adopted, prevent partially faint written traces from occurring and provide smooth writing, a ballpoint pen refill, a ballpoint pen, and a method of manufacturing a ballpoint pen tip. A triangular pyramid-shaped recess (42) gradually tapered toward an ink guide hole (36) is provided in the bottom of a ball housing (31), and troughs (44) formed in the recess (42) are utilized as ink reservoirs and ink paths. Because the troughs (44) have sufficient length, width, and depth, the amount of containment of the ink and the amount of supply of the ink are increased.
    Type: Application
    Filed: March 10, 2010
    Publication date: February 16, 2012
    Applicant: MITSUBISHI PENCIL CO., LTD.
    Inventor: Yoshihide Ishii
  • Publication number: 20110297305
    Abstract: The present invention provides a coloring composition which comprises pigment particles whose average particle size is not more than 200 nm and binder polymer particles. The composition permits the formation of a thin and uniform colored and coated layer on the surface of a fibrous structure without forming any color spot and without impairing the aesthetic properties and the flexibility of the fibrous structure and it has a good color-developing ability and excellent fastness of color. The method for coloring a fibrous structure using this composition permits the coloration of even a mixed material using a single coloring composition and at a single coloration step and the method is quite simple, it can ensure a high working efficiency, a high energy efficiency and quite effective use of water resources and it is free of any environmental pollution.
    Type: Application
    Filed: August 18, 2011
    Publication date: December 8, 2011
    Applicant: MITSUBISHI PENCIL CO., LTD
    Inventors: Masaru Miyamoto, Tadashi Kamagata
  • Patent number: 8043686
    Abstract: A method of moulding a composite member and a composite member are provided in which a convex part can be formed at one member by moulding the other member integrally to the one member. A concave part 10a is provided at least at a part inside a metal mould 10 located on the side opposite the second member fusion bonding surface side of the above-mentioned first member 6b, the above-mentioned second thermoplastic material is melted and ejected to the second member fusion bonding surface side of the first member 6b, the first member 6b is changed in shape by injection pressure of the melted second thermoplastic material, and a convex part 6a is formed at the first member.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: October 25, 2011
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Hitoshi Suzuki, Kyo Nakayama, Takeo Fukumoto, Hajime Sumitomo, Norio Ohsawa
  • Patent number: 7980778
    Abstract: A liquid applicator includes a liquid pressing mechanism 6 for pressurizing an application liquid 4 inside a main body 2 so as to supply the application liquid to an applying member 10 at the front end by the pressing of liquid pressing mechanism 6, wherein the applying member 10 is made of an elastic material, has a valve structure 8 which is formed with a communication path 24 for communication between the inside and outside of main body 2 and can close the communication path 24 by elasticity in the normal condition and open the communication path 24 by elastic deformation of the communication path when the application liquid is pressurized by liquid pressing mechanism 6, and, an ejection opening 24a of communication path 24 of valve structure 8 is arranged to front onto the applying portion 10a of the applying member 10.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: July 19, 2011
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Tetsuaki Akaishi, Takashi Umeno, Mitsuru Endoh, Nobuyuki Nakajima
  • Patent number: 7938592
    Abstract: A refill of a low viscosity water-based ink ballpoint pen is provided with a housing, a pen tip attached to a front end of the housing, an ink tank (4) formed inside the housing, an ink guide member guiding ink in the ink tank (4) to the pen tip, and an air passage formed between the ink tank and the pen tip in the housing and connecting the ink tank and outside of the housing. The inside of the ink tank is divided by partition walls (11) into a plurality of ink chambers arranged in the longitudinal direction, and the ink guide member is used to guide the ink in these ink chambers from the ink chambers close to the pen tip successively to the pen tip. A substantially uniform clearance (13) is provided over the entire circumferences between the outer circumferential surface of each partition wall (11) and the inner circumferential surface of the ink tank (4). A ring-shaped ink film formed at each clearance (13) is used to hold the ink in each ink chamber.
    Type: Grant
    Filed: August 27, 2007
    Date of Patent: May 10, 2011
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Hisami Tamano
  • Patent number: 7909901
    Abstract: A liquid cartridge includes a vessel body for containing liquid. The vessel body includes a plurality of surfaces. An oxygen outlet is provided on one surface among the plurality of surfaces of the vessel body. And an oxygen input is provided on a surface other than a furthest surface from the surface on which the oxygen outlet is provided among the plurality of surfaces of the vessel body.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: March 22, 2011
    Assignees: Casio Computer Co., Ltd., Mitsubishi Pencil Co., Ltd.
    Inventors: Yasunari Kabasawa, Toshimi Kamitani, Kiyoshi Fujisawa
  • Patent number: 7901463
    Abstract: In order to provide an accumulatively dying hair color of a hair manicure type which does not require washing of hair immediately after used and by which hair are gradually dyed by repeating use thereof as a temporary coloring material, used is a hair color comprising 0.1 to 3% by weight of at least one of water-soluble dyes, 1.5 to 10% by weight of a nonionic or anionic silicone base resin, 0.1 to 1.5% by weight of an amphoteric acryl resin, 3 to 20% by weight of a hair dying auxiliary, 30 to 80% by weight of a lower alcohol and 5 to 50% by weight of water and having a pH controlled to 2 to 5.
    Type: Grant
    Filed: February 16, 2004
    Date of Patent: March 8, 2011
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventor: Takashi Umeno
  • Patent number: 7883815
    Abstract: A fuel cell is equipped with a fuel cell main body, a liquid fuel-storing tank for storing a liquid fuel and a fuel-supplying member which has a penetrating structure and is connected with the liquid fuel-storing tank and which supplies the liquid fuel to the liquid fuel main body, wherein the liquid fuel-storing tank is provided with a liquid fuel reservoir comprising a cylindrical fuel-storing vessel for storing the liquid fuel, a fuel discharge part provided at a lower part of the fuel-storing vessel and having a fuel discharge valve and a follower which is disposed at a rear end of the liquid fuel stored in the fuel-storing vessel and which moves as the liquid fuel is consumed, a housing box member which encompasses at least a part of the liquid fuel reservoir via a space part in the periphery of the liquid fuel reservoir and whose rear end part is closed and pressurized gas which is filled in the space part.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: February 8, 2011
    Assignees: Mitsubishi Pencil Co., Ltd., Casio Computer Co., Ltd.
    Inventors: Yoshihisa Suda, Kouji Nishimura, Takahiro Osada, Kunitaka Yamada, Toshimi Kamitani, Yasunari Kabasawa
  • Publication number: 20110002728
    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: September 15, 2010
    Publication date: January 6, 2011
    Applicant: MITSUBISHI PENCIL CO., LTD.
    Inventors: Hirotake Izawa, Takeo Fukumoto, Noio Ohsawa, Kyo Nakayama, Yoshitoshi Osano
  • Publication number: 20100322695
    Abstract: It is arranged that a writing lead (10) is grasped and released by reciprocation of a chuck (3) provided in a body cylinder (1) so as to inch the above-mentioned writing lead forward and a rotational drive mechanism is provided for rotationally driving a rotor (5) in one direction in conjunction with retreat operation by the writing pressure applied to the above-mentioned writing lead and forward movement by releasing the writing pressure. A pipe support member (8) for supporting a pipe end (7) is accommodated in a base (1A) which constitutes a front end portion of the above-mentioned body cylinder, and a retreat drive mechanism is provided for gradually retreating the pipe end supported by the above-mentioned pipe support member towards the above-mentioned body cylinder in conjunction with rotational drive operation of the above-mentioned rotor which constitutes the above-mentioned rotational drive mechanism.
    Type: Application
    Filed: December 18, 2008
    Publication date: December 23, 2010
    Applicant: MITSUBISHI PENCIL CO., LTD.
    Inventors: Norio Ohsawa, Takeo Fukumoto, Yoshitoshi Osano, Takeshi Kobayashi, Hirotake Izawa, Kyo Nakayama
  • Patent number: 7851106
    Abstract: Provided is a fuel cartridge detachably connected with a fuel cell main body, wherein the fuel cartridge 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 at the rear end of the liquid fuel; a follower auxiliary member which has no fluidity and is insoluble in the liquid fuel is inserted into the follower; and at least one protruding part is formed at an upper end part of the follower auxiliary member.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: December 14, 2010
    Assignees: Mitsubishi Pencil Co., Ltd., Casio Computer Co., Ltd.
    Inventors: Toshimi Kamitani, Yasunari Kabasawa
  • Patent number: 7850380
    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). 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.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: December 14, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Hirotake Izawa, Takeshi Kobayashi, Kyo Nakayama
  • Patent number: 7850381
    Abstract: A chuck (4) for grasping a writing lead and a rotor (6) arranged to be movable together 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. Retreat operation and forward movement (cushion action) of the writing lead by writing pressure are provided with a damping effect by sticky grease (19) interposed between a stopper (16) and a torque canceller (17). As a result, a sense of uncomforting, when writing, generated in conjunction with the cushion action can be reduced.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: December 14, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Hirotake Izawa, Takeshi Kobayashi, Kyo Nakayama
  • Patent number: 7837404
    Abstract: An applicator which includes a rear barrel 1; an ink occlusion element 10 accommodated in rear barrel 1; an ink occlusion element receiver 20 opposing the front end part of ink occlusion element 10; a see-through front barrel 30 fitted to the opening of rear barrel 1, a detection tube 40 inserted in front barrel 30 for flowing ink from ink occlusion element 10; a joint core 50 supported by detection tube 40 and flowing out ink from ink occlusion element 10; and a pen core 60 supported by detection tube 40 and disposed on the opposite side of joint core 50 with a detection space 63 from joint core 50. Detection tube 40, joint core 50 and pen core 60 are formed into an integral structure. It is possible to exactly grasp the ink end state in a visual manner, based on the presence/absence of ink in detection space 63 of detection tube 40.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: November 23, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Atsushi Iwasa, Yukinori Sawa, Akira Fukai, Takahiro Osada
  • Publication number: 20100266325
    Abstract: A chuck (4) for grasping a writing lead and a rotor (6) arranged to be movable together 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. Retreat operation and forward movement (cushion action) of the writing lead by writing pressure are provided with a damping effect by sticky grease (19) interposed between a stopper (16) and a torque canceller (17). As a result, a sense of uncomforting, when writing, generated in conjunction with the cushion action can be reduced.
    Type: Application
    Filed: December 18, 2008
    Publication date: October 21, 2010
    Applicant: MITSUBISHI PENCIL CO., LTD.
    Inventors: Hirotake Izawa, Takeshi Kobayashi, Kyo Nakayama
  • Patent number: 7815385
    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: December 11, 2009
    Date of Patent: October 19, 2010
    Assignee: Mitsubishi Pencil Co., Ltd.
    Inventors: Hirotake Izawa, Takeo Fukumoto, Norio Ohsawa, Kyo Nakayama, Yoshitoshi Osano
  • Publication number: 20100254746
    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. 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: Application
    Filed: October 15, 2008
    Publication date: October 7, 2010
    Applicant: MITSUBISHI PENCIL CO., LTD.
    Inventors: Hirotake Izawa, Takeshi Kobayashi, Kyo Nakayama