Patents Assigned to The Pilot Ink Co., Ltd.
  • Patent number: 10493791
    Abstract: A thermochromic writing instrument including a writing body, storing a thermochromic ink therein, stored in a barrel; an operation body provided in the barrel to be operated to longitudinally move the writing body; a nib of the writing body configured to be capable of appearing from a front end of the writing instrument, wherein the writing instrument 1 further includes a friction unit, for rubbing handwriting in the thermochromic ink and capable of thermally changing the color of the handwriting by frictional heat generated at that time, and at least one clip body as the operation body, the friction unit 10 is provided at a rear end of the barrel, and the clip body is provided in an area other than the rear end of the barrel.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: December 3, 2019
    Assignees: THE PILOT INK CO., LTD., KABUSHIKI KAISHA PILOT CORPORATION
    Inventor: Yoshihiro Ito
  • Patent number: 10358570
    Abstract: [Problems] An object of the present invention is to provide: a thermochromic color-memory composition which effectively expresses a property of being able to interchangeably memorize and retain colors and which is thus applicable to various fields; and a thermochromic color-memory microcapsule pigment encapsulating the same.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: July 23, 2019
    Assignee: THE PILOT INK CO., LTD.
    Inventor: Yoshiaki Ono
  • Publication number: 20180223120
    Abstract: [Problems] An object of the present invention is to provide: a thermochromic color-memory composition which effectively expresses a property of being able to interchangeably memorize and retain colors and which is thus applicable to various fields; and a thermochromic color-memory microcapsule pigment encapsulating the same.
    Type: Application
    Filed: July 19, 2016
    Publication date: August 9, 2018
    Applicant: THE PILOT INK CO., LTD.
    Inventor: Yoshiaki ONO
  • Patent number: 9937434
    Abstract: The present invention relates to a photochromic toy containing a light irradiator equipped with a light source and a toy main body containing a photochromic compound, in which the light source has a peak wavelength in the range of from 400 nm to 495 nm and the photochromic compound satisfies the following expression (1) between the integrated value of absorbance (x) in the range of from a wavelength showing a maximum absorbance in less than 400 nm to a wavelength of 400 nm and the integrated value of absorbance (y) in the wavelength range of from 400 nm to 700 nm. y/x?0.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: April 10, 2018
    Assignee: THE PILOT INK CO., LTD.
    Inventors: Michiyuki Yasuda, Yutaka Shibahashi, Yoshie Kamiya
  • Patent number: 9933721
    Abstract: Disclosed is a decolorizable electrophotographic toner, including: a binder resin; and a colorant which contains at least a color developable compound and a color developing agent and is covered with an outer shell so as to have a capsule structure, wherein the number ratio of particles having an equivalent circle diameter of 0.6 ?m or more and 2.5 ?m or less of the toner when measured using a flow particle image analyzer after the toner is dispersed in an aqueous medium at a ratio of 0.08% by weight and the resulting dispersion is subjected to a stirring treatment in which stirring is performed at 5000 rpm for 30 minutes using a homogenizer (T-25 digital ULTRA-TURRAX (manufactured by IKA Japan K.K., provided with a shaft generator S25N-10G)) is 30% by number or less.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: April 3, 2018
    Assignees: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA PILOT CORPORATION, THE PILOT INK CO., LTD.
    Inventors: Masahiro Ikuta, Takahito Kabai, Takayasu Aoki, Tsuyoshi Itou
  • Patent number: 9855789
    Abstract: Provided are thermochromic color-memorizing composition and thermochromic color-memorizing microcapsule pigment encapsulating the same, the thermochromic color-memorizing composition including: (a) an electron-donating color-developing organic compound; (b) an electron-accepting compound; and (c) an ester compound represented by the following formula (1) as a reaction medium which controls color reaction between the components (a) and (b):
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: January 2, 2018
    Assignee: THE PILOT INK CO., LTD.
    Inventor: Yoshiaki Ono
  • Publication number: 20170274698
    Abstract: Provided are thermochromic color-memorizing composition and thermochromic color-memorizing microcapsule pigment encapsulating the same, the thermochromic color-memorizing composition including: (a) an electron-donating color-developing organic compound; (b) an electron-accepting compound; and (c) an ester compound represented by the following formula (1) as a reaction medium which controls color reaction between the components (a) and (b):
    Type: Application
    Filed: August 4, 2015
    Publication date: September 28, 2017
    Applicant: THE PILOT INK CO., LTD.
    Inventor: Yoshiaki ONO
  • Patent number: 9695329
    Abstract: [Problems] An object of the present invention is to provide: thermochromic color-memory composition which effectively expresses a property of being capable of interchangeably memorizing and retaining colors and is thus applicable to various fields; and thermochromic memory microcapsule pigment encapsulating the same.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: July 4, 2017
    Assignee: THE PILOT INK CO., LTD.
    Inventor: Yoshiaki Ono
  • Patent number: 9682594
    Abstract: Provided are thermochromic color-memory composition and thermochromic color-memory microcapsule pigment encapsulating the same, the thermochromic color-memory composition including: (a) a component composed of an electron-donating color-developing organic compound; (b) a component composed of an electron-accepting compound; and (c) a component composed of an ester compound represented by the following Formula (1) as a reaction medium which controls color reaction between the components (a) and (b): (wherein, R represents an alkyl group having 3 to 18 carbon atoms or an aliphatic acyl group having 3 to 18 carbon atoms; X represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 or 2 carbon atoms or a halogen atom; Y represents a hydrogen atom or a methyl group; and Z represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 or 2 carbon atoms or a halogen atom).
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: June 20, 2017
    Assignee: THE PILOT INK CO., LTD.
    Inventor: Yoshiaki Ono
  • Publication number: 20170088737
    Abstract: An ink composition for a reversibly thermochromic stamp including a reversibly thermochromic microencapsulated pigment encapsulating a reversibly thermochromic composition including: Component (A): an electron-donating color-developing organic compound, Component (B): an electron-accepting compound, and Component (C): a reaction medium causing reversibly an electron transfer reaction between the Component (A) and the Component (B) in a specific temperature range, water and a thickener.
    Type: Application
    Filed: April 23, 2015
    Publication date: March 30, 2017
    Applicants: KABUSHIKI KAISHA PILOT CORPORATION, THE PILOT INK CO., LTD.
    Inventors: Akio NAKASHIMA, Hiroshi UMEMOTO, Taeko OZAWA
  • Patent number: 9592702
    Abstract: There is provided a friction body which is adapted to rub a thermochromic image or handwriting formed on a paper surface by use of thermochromic ink to thermally discolor the thermochromic image or handwriting by frictional heat resultant from rubbing, a thermal conductivity of a friction portion of the friction body is set to be within 0.05 W/(m·K) to 50 W/(m·K).
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: March 14, 2017
    Assignees: THE PILOT INK CO., LTD., KABUSHIKI KAISHA PILOT CORPORATION
    Inventors: Takashi Wase, Michiyuki Yasuda, Yoshiaki Okawara
  • Publication number: 20170050460
    Abstract: Provided are thermochromic color-memory composition and thermochromic color-memory microcapsule pigment encapsulating the same, the thermochromic color-memory composition including: (a) a component composed of an electron-donating color-developing organic compound; (b) a component composed of an electron-accepting compound; and (c) a component composed of an ester compound represented by the following Formula (1) as a reaction medium which controls color reaction between the components (a) and (b): (wherein, R represents an alkyl group having 3 to 18 carbon atoms or an aliphatic acyl group having 3 to 18 carbon atoms; X represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 or 2 carbon atoms or a halogen atom; Y represents a hydrogen atom or a methyl group; and Z represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 or 2 carbon atoms or a halogen atom).
    Type: Application
    Filed: February 4, 2015
    Publication date: February 23, 2017
    Applicant: THE PILOT INK CO., LTD.
    Inventor: Yoshiaki ONO
  • Patent number: 9500969
    Abstract: Disclosed here is a method for producing a decolorizable electrophotographic toner, comprising mixing a first dispersion liquid in which a colorant is dispersed in an amount such that the content of the colorant in the toner is from 5% to 35% by weight, with a second dispersion liquid in which particles containing at least a binder resin and having a volume average particle diameter of 500 nm or less are dispersed, aggregating the colorant and the particles containing at least the binder resin, thereby obtaining aggregated particles, fusing the aggregated particles at a temperature lower than a completely decolorizing temperature of the colorant to obtain the toner, and measuring the number ratio of particles having an equivalent circle diameter of 0.6 ?m or more and 2.5 ?m or less of the toner using a flow particle image analyzer after the toner is subjected to a stirring treatment.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: November 22, 2016
    Assignees: Toshiba Tec Kabushiki Kaisha, Kabushiki Kaisha Pilot Corporation, The Pilot Ink Co., Ltd.
    Inventors: Masahiro Ikuta, Takahito Kabai, Takayasu Aoki, Tsuyoshi Itou
  • Publication number: 20160130455
    Abstract: [Problems] An object of the present invention is to provide: thermochromic color-memory composition which effectively expresses a property of being capable of interchangeably memorizing and retaining colors and is thus applicable to various fields; and thermochromic memory microcapsule pigment encapsulating the same.
    Type: Application
    Filed: June 12, 2014
    Publication date: May 12, 2016
    Applicant: THE PILOT INK CO., LTD.
    Inventor: Yoshiaki ONO
  • Publication number: 20160116855
    Abstract: Disclosed is a decolorizable electrophotographic toner, including: a binder resin; and a colorant which contains at least a color developable compound and a color developing agent and is covered with an outer shell so as to have a capsule structure, wherein the number ratio of particles having an equivalent circle diameter of 0.6 ?m or more and 2.5 ?m or less of the toner when measured using a flow particle image analyzer after the toner is dispersed in an aqueous medium at a ratio of 0.08% by weight and the resulting dispersion is subjected to a stirring treatment in which stirring is performed at 5000 rpm for 30 minutes using a homogenizer (T-25 digital ULTRA-TURRAX (manufactured by IKA Japan K.K., provided with a shaft generator S25N-10G)) is 30% by number or less.
    Type: Application
    Filed: December 31, 2015
    Publication date: April 28, 2016
    Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA PILOT CORPORATION, THE PILOT INK CO., LTD.
    Inventors: Masahiro IKUTA, Takahito KABA!, Takayasu AOKI, Tsuyoshi ITOU
  • Patent number: 9266379
    Abstract: A thermochromic writing instrument contains a thermochromic ink, wherein a writing body is accommodated in a barrel movably in a longitudinal direction, an operation portion is provided on the outer surface of the barrel, a pen tip of the writing body is constituted so as to be projectable/retractable from/into a front-end hole of the barrel by operating the operation portion, the thermochromic ink is contained in the inside of the writing body, the pen tip capable of ejecting the thermochromic ink is provided at the front end of the writing tool, and a friction portion capable of thermally changing the color of the handwriting of the thermochromic ink by the frictional heat generated when the handwriting is rubbed with the friction portion is provided on the outer surface of the barrel.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: February 23, 2016
    Assignees: THE PILOT INK CO., LTD., KABUSHIKI KAISHA PILOT CORPORATION
    Inventors: Yoshinori Imamura, Nobuo Sekine, Masashi Ando
  • Patent number: 9233574
    Abstract: A thermochromic writing instrument contains a thermochromic ink, wherein a writing body is accommodated in a barrel movably in a longitudinal direction, an operation portion is provided on the outer surface of the barrel, a pen tip of the writing body is constituted so as to be projectable/retractable from/into a front-end hole of the barrel by operating the operation portion, the thermochromic ink is contained in the inside of the writing body, the pen tip capable of ejecting the thermochromic ink is provided at the front end of the writing tool, and a friction portion capable of thermally changing the color of the handwriting of the thermochromic ink by the frictional heat generated when the handwriting is rubbed with the friction portion is provided on the outer surface of the barrel.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: January 12, 2016
    Assignees: THE PILOT INK CO., LTD., KABUSHIKI KAISHA PILOT CORPORATION
    Inventors: Yoshinori Imamura, Nobuo Sekine, Masashi Ando
  • Patent number: 9108456
    Abstract: A thermochromic writing instrument 1 including a writing body 9, storing a thermochromic ink therein, stored in a barrel 2; an operation body provided in the barrel 2 to be operated to longitudinally move the writing body 9; a nib 91 of the writing body 9 configured to be capable of appearing from a front end of the writing instrument, wherein the writing instrument 1 further includes a friction unit 10, for rubbing handwriting in the thermochromic ink and capable of thermally changing the color of the handwriting by frictional heat generated at that time, and at least one clip body 7 as the operation body, the friction unit 10 is provided at a rear end of the barrel 2, and the clip body 7 is provided in an area other than the rear end of the barrel 2.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: August 18, 2015
    Assignees: The Pilot Ink Co., Ltd., Kabushiki Kaisha Pilot Corporation
    Inventor: Yoshihiro Ito
  • Patent number: 9005857
    Abstract: The present invention relates to a thermochromic color-memory toner containing: a microcapsule pigment encapsulating a thermochromic color-memory composition; and a binder resin, in which the microcapsule pigment shows a hysteresis characteristic that, in a temperature-rise process, decoloration starts when the temperature reaches t3 and the pigment completely reaches a decolored state in a temperature region of t4 or higher, and in a temperature-drop process, coloration starts when the temperature reaches t2 and the pigment completely reaches a colored state in a temperature region of ti or lower, and ti is in a range of from ?50 to 0° C. and t4 is in a range of from 50 to 150° C.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: April 14, 2015
    Assignee: The Pilot Ink Co., Ltd.
    Inventors: Katsuyuki Fujita, Yoshiaki Ono, Yutaka Shibahashi
  • Patent number: 8962522
    Abstract: The present invention relates to a thermochromic color-memory composition containing: (I) an electron donating coloring organic compound, (II) an electron accepting compound, and (III) an ester compound represented by the following formula (1) as a reaction medium which controls color reaction of the components (I) and (II): (in the formula, X represents any of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and a halogen atom, m represents an integer of from 1 to 3, and n represents an integer of from 1 to 20).
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: February 24, 2015
    Assignee: The Pilot Ink Co., Ltd.
    Inventor: Yoshiaki Ono