Patents by Inventor Yuji Moriki
Yuji Moriki 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).
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Publication number: 20100035171Abstract: Provided is a yellow toner having toner particles each containing at least a binder resin, a colorant, and a polar resin, the yellow toner being characterized in that: the colorant is a coloring compound having a specific structure; in a microscopic compression test at a measurement temperature of 25° C., the toner has a recovery ratio Z(25) of 40 to 80%; and the toner has a glass transition temperature (TgA) measured with a differential scanning calorimeter (DSC) of 40° C. to 60° C. and a temperature (P1) of the highest endothermic peak measured with the DSC of 70° C. to 90° C., and the temperature (P1) of the highest endothermic peak and the glass transition temperature (TgA) satisfy the relationship of 15° C.?P1?TgA?50° C.Type: ApplicationFiled: June 15, 2009Publication date: February 11, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Shuntaro Watanabe, Yuji Moriki, Ken-ichi Nakayama, Koji Inaba, Masayoshi Kato, Masatake Tanaka, Takayuki Toyoda
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Patent number: 7537875Abstract: In a toner having toner particles which comprise toner base particles containing at least a colorant, a release agent and a polar resin, and an inorganic fine powder, the polar resin is a resin having at least a polyester unit, synthesized in the presence of an aromatic carboxylic acid titanium compound used as a catalyst, and has an acid value of from 3 mgKOH/g to 35 mgKOH/g. The toner base particles are obtained by carrying out granulation in an aqueous medium, and the toner has a weight-average particle diameter of from 4.0 ?m to 10.0 ?m.Type: GrantFiled: June 22, 2005Date of Patent: May 26, 2009Assignee: Canon Kabushiki KaishaInventors: Yushi Mikuriya, Satoshi Handa, Yuji Moriki, Yasushi Katsuta, Emi Tosaka
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Patent number: 7387860Abstract: A toner includes toner particles containing at least a binder resin and a colorant, and inorganic fine particles. The shape factor SF-1 of the toner particles is in a specific range. The toner has a storage elastic modulus at 140° C., G? (140° C.), in a specific range the toner comes to have a viscosity of 1.0×103 Pa·s according to a flow tester heating method at a temperature of from 115° C. or more to less than 130° C.Type: GrantFiled: June 5, 2007Date of Patent: June 17, 2008Assignee: Canon Kabushiki KaishaInventors: Yuji Moriki, Shinya Yachi, Yushi Mikuriya, Keiji Komoto, Kenichi Nakayama, Takeshi Kaburagi, Emi Tosaka
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Publication number: 20070231718Abstract: A toner includes toner particles containing at least a binder resin and a colorant, and inorganic fine particles. The shape factor SF-1 of the toner particles is in a specific range. The toner has a storage elastic modulus at 140° C., G? (140° C.), in a specific range the toner comes to have a viscosity of 1.0×103 Pa·s according to a flow tester heating method at a temperature of from 115° C. or more to less than 130° C.Type: ApplicationFiled: June 5, 2007Publication date: October 4, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Yuji Moriki, Shinya Yachi, Yushi Mikuriya, Keiji Komoto, Kenichi Nakayama, Takeshi Kaburagi, Emi Tosaka
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Patent number: 7241546Abstract: A toner includes toner particles containing at least a binder resin and a colorant, and inorganic fine particles. The shape factor SF-1 of the toner particles is in a specific range. The toner has a storage elastic modulus at 140° C., G? (140° C.), in a specific range the toner comes to have a viscosity of 1.0×103 Pa·s according to a flow tester heating method at a temperature of from 115° C. or more to less than 130° C.Type: GrantFiled: June 25, 2004Date of Patent: July 10, 2007Assignee: Canon Kabushiki KaishaInventors: Yuji Moriki, Shinya Yachi, Yushi Mikuriya, Keiji Komoto, Kenichi Nakayama, Takeshi Kaburagi, Emi Tosaka
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Patent number: 7209690Abstract: A developing apparatus including: a developer carrying member for carrying a developer, the developer carrying member being provided with an elastic layer and adapted to develop, with a developer, an electrostatic image formed on an image bearing member; wherein the developer includes a toner, the toner has a shape factor SF-1 of 100 or more but less than 130, the toner has a storage modulus G? (140° C.) at 140° C. of 2.0×103 dN/m2 or more but less than 2.0×104 dN/m2, the toner has a temperature, when the toner has a viscosity of 1.0×103 Pa·s in a flow tester temperature elevation method, of 115° C. or more but less than 130° C., and, in a surface roughness of the developer carrying member, a center-line mean roughness Ra, a ten-point mean roughness Rz and a mean spacing Sm of irregularities satisfy following relationships (1): 0.06 ? Rz / Sm ? 0.4 0.8 ? Ra ? 2.0 ? ? ( ? ? ? m ) } .Type: GrantFiled: March 28, 2005Date of Patent: April 24, 2007Assignee: Canon Kabushiki KaishaInventors: Masato Koyanagi, Tetsuya Kobayashi, Shinya Yamamoto, Kohei Matsuda, Shinichi Agata, Kentarou Kawata, Yuji Moriki
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Patent number: 7112393Abstract: In a non-magnetic toner having non-magnetic toner particles containing at least a binder resin and a colorant, and an inorganic fine powder, the non-magnetic toner particles contain at least one ether compound having a specific structure, and the ether compound is in a content of from 5 ppm to 1,000 ppm.Type: GrantFiled: January 27, 2004Date of Patent: September 26, 2006Assignee: Canon Kabushiki KaishaInventors: Keiji Komoto, Yushi Mikuriya, Yuji Moriki, Yasushi Katsuta, Kenichi Nakayama, Takeshi Kaburagi, Emi Tosaka, Yasuhiro Hashimoto
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Publication number: 20060166120Abstract: In a toner having toner particles containing at least a binder resin, a colorant and a release agent, the toner has a loss tangent (tan ?) which has a minimum value 1 and a maximum value 1 at from 70° C. or more to less than 110° C. and has a maximum value 2 at from 140° C. or more to less than 200° C. and has a loss elastic modulus at 140° C., G?(140° C.), which is: 1.0×104 dN/m2?G?(140° C.)?2.0×105 dN/m2; and the binder resin is chiefly composed of a vinyl type copolymer. This can provide a toner with which images kept to have gloss within a preferable state can be obtained without changing fixing speed and fixing temperature even when transfer materials of different types are used.Type: ApplicationFiled: December 23, 2005Publication date: July 27, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Yuji Moriki, Keiji Komoto, Yasushi Katsuta, Takeshi Kaburagi, Tomoaki Igarashi
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Publication number: 20060063082Abstract: In a toner having toner particles which comprise toner base particles containing at least a colorant, a release agent and a polar resin, and an inorganic fine powder, the polar resin is a resin having at least a polyester unit, synthesized in the presence of an aromatic carboxylic acid titanium compound used as a catalyst, and has an acid value of from 3 mgKOH/g to 35 mgKOH/g. The toner base particles are obtained by carrying out granulation in an aqueous medium, and the toner has a weight-average particle diameter of from 4.0 ?m to 10.0 ?m.Type: ApplicationFiled: June 22, 2005Publication date: March 23, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Yushi Mikuriya, Satoshi Handa, Yuji Moriki, Yasushi Katsuta, Emi Tosaka
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Publication number: 20050214032Abstract: A developing apparatus including: a developer carrying member for carrying a developer, the developer carrying member being provided with an elastic layer and adapted to develop, with a developer, an electrostatic image formed on an image bearing member; wherein the developer includes a toner, the toner has a shape factor SF-1 of 100 or more but less than 130, the toner has a storage modulus G? (140° C.) at 140° C. of 2.0×103 dN/m2 or more but less than 2.0×104 dN/m2, the toner has a temperature, when the toner has a viscosity of 1.0×103 Pa·s in a flow tester temperature elevation method, of 115° C. or more but less than 130° C., and, in a surface roughness of the developer carrying member, a center-line mean roughness Ra, a ten-point mean roughness Rz and a mean spacing Sm of irregularities satisfy following relationships (1): 0.06 ? Rz / Sm ? 0.4 0.8 ? Ra ? 2.Type: ApplicationFiled: March 28, 2005Publication date: September 29, 2005Applicant: Canon Kabushiki KaishaInventors: Masato Koyanagi, Tetsuya Kobayashi, Shinya Yamamoto, Kohei Matsuda, Shinichi Agata, Kentarou Kawata, Yuji Moriki
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Patent number: 6859633Abstract: In a process cartridge having a latent-image-bearing member and a developing device having a developer-holding part and a developing member, at a vertical section which bisects in the process cartridge the surface of the latent-image-bearing member with which surface the developing member is brought into pressure contact, a developer agitation and transport member has at least two rotary agitation and transport members having rotating shafts falling at right angles with the vertical section. Where, at the vertical section, the area of the developer-holding part is represented by S1 and the area of the part corresponding to the movable region of the rotary agitation and transport member is represented by S2, the ratio of S2 to S1, S2/S1, is from 0.8 to 0.99; and the ratio of a long side Sa to a short side Sb, Sa/Sb, of a circumparallelogram having a minimum area in respect to the area S1 in the vertical section is from 1.5 to 3.0.Type: GrantFiled: January 13, 2003Date of Patent: February 22, 2005Assignee: Canon Kabushiki KaishaInventors: Satoshi Handa, Hiroaki Kawakami, Yuji Moriki, Kiyokazu Suzuki, Yasuhiro Hashimoto
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Publication number: 20050026062Abstract: In a non-magnetic toner having non-magnetic toner particles containing at least a binder resin and a colorant, and an inorganic fine powder, the non-magnetic toner particles contain at least one ether compound having a specific structure, and the ether compound is in a content of from 5 ppm to 1,000 ppm.Type: ApplicationFiled: January 27, 2004Publication date: February 3, 2005Inventors: Keiji Komoto, Yushi Mikuriya, Yuji Moriki, Yasushi Katsuta, Kenichi Nakayama, Takeshi Kaburagi, Emi Tosaka, Yasuhiro Hashimoto
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Publication number: 20050026055Abstract: A toner includes toner particles containing at least a binder resin and a colorant, and inorganic fine particles. The shape factor SF-1 of the toner particles is in a specific range. The toner has a storage elastic modulus at 140° C., G? (140° C.), in a specific range the toner comes to have a viscosity of 1.0×103 Pa·s according to a flow tester heating method at a temperature of from 115° C. or more to less than 130° C.Type: ApplicationFiled: June 25, 2004Publication date: February 3, 2005Applicant: CANON KABUSHIKI KAISHAInventors: Yuji Moriki, Shinya Yachi, Yushi Mikuriya, Keiji Komoto, Kenichi Nakayama, Takeshi Kaburagi, Emi Tosaka
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Publication number: 20030175043Abstract: In a process cartridge having a latent-image-bearing member and a developing means having a developer-holding part and a developing member, at a vertical section which bisects in the process cartridge the surface of the latent-image-bearing member with which surface the developing member is brought into pressure contact, a developer agitation and transport member has at least two rotary agitation and transport means having rotating shafts falling at right angles with the vertical section. Where, at the vertical section, the area of the developer-holding part is represented by S1 and the area of the part corresponding to the movable region of the rotary agitation and transport means is represented by S2, the ratio of S2 to S1, S2/S1, is from 0.8 to 0.99; and the ratio of a long side Sa to a short side Sb, Sa/Sb, of a circumparallelogram having a minimum area in respect to the area S1 in the vertical section is from 1.5 to 3.0.Type: ApplicationFiled: January 13, 2003Publication date: September 18, 2003Applicant: Canon Kabushiki KaishaInventors: Satoshi Handa, Hiroaki Kawakami, Yuji Moriki, Kiyokazu Suzuki, Yasuhiro Hashimoto
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Patent number: 6569589Abstract: A toner having a good chargeability stable against an environmental change is formed of toner particles each comprising at least a binder resin, a colorant, a release agent and a sulfur-containing polymer, and an external additive. The toner particles contain 100 to 30,000 ppm by weight thereof of at least one stabilizer element selected from the group consisting of magnesium, calcium, barium, zinc, aluminum and phosphorus. The toner particles may preferably be produced by suspension polymerization of a monomer composition containing the sulfur-containing polymer in an aqueous medium containing a dispersion stabilizer having the stabilizer element.Type: GrantFiled: July 27, 2001Date of Patent: May 27, 2003Assignee: Canon Kabushiki KaishaInventors: Koji Inaba, Hiroaki Kawakami, Tatsuya Nakamura, Shinya Yachi, Yuji Moriki, Satoshi Handa, Katsuyuki Nonaka, Yoshihiro Nakagawa
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Patent number: 6544708Abstract: An image forming method using a dry toner and exhibiting good quick-start and power economization characteristics is provided. The image forming method includes a heat-pressure fixing step using a rotatable electromagnetic induction heat-generation type heating member. The toner used therein is characterized by a moisture content of at most 3.00 wt. %, and viscoelasticities as represented by a storage modulus at 110° C. of G′ (110° C.) and a storage modulus at 140° C. of G′ (140° C.) satisfying: G′ (110° C.)≦1.00×106 dN/m2, and G′ (140° C.)≧7.00×103 dN/m3.Type: GrantFiled: March 27, 2001Date of Patent: April 8, 2003Assignee: Canon Kabushiki KaishaInventors: Keiji Komoto, Hiroaki Kawakami, Tatsuhiko Chiba, Atsuyoshi Abe, Yuji Moriki, Michihisa Magome, Satoshi Handa, Kiyokazu Suzuki
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Patent number: 6458502Abstract: A process for producing a polymerization toner, which comprises preparing a polymerizable-monomer composition which contains at least a polymerizable monomer and a colorant and does not contain any polymerization initiator, i) introducing the polymerizable-monomer composition into an aqueous medium to effect granulation, adding a polymerization initiator to the aqueous medium in the course of the granulation or after the granulation has been completed, or ii) adding a polymerization initiator in an aqueous medium, introducing the polymerizable-monomer composition into the aqueous medium to effect granulation, and then polymerizing the polymerizable-monomer composition having been granulated, to produce toner particles. In the process, the polymerization initiator is added in a specific time and a specific manner.Type: GrantFiled: June 7, 2001Date of Patent: October 1, 2002Assignee: Canon Kabushiki KaishaInventors: Tatsuya Nakamura, Hiroaki Kawakami, Koji Inaba, Yuji Moriki, Satoshi Handa, Katsuyuki Nonaka
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Publication number: 20020055055Abstract: A process for producing a polymerization toner, which comprises preparing a polymerizable-monomer composition which contains at least a polymerizable monomer and a colorant and does not contain any polymerization initiator, i) introducing the polymerizable-monomer composition into an aqueous medium to effect granulation, adding a polymerization initiator to the aqueous medium in the course of the granulation or after the granulation has been completed, or ii) adding a polymerization initiator in an aqueous medium, introducing the polymerizable-monomer composition into the aqueous medium to effect granulation, and then polymerizing the polymerizable-monomer composition having been granulated, to produce toner particles.Type: ApplicationFiled: June 7, 2001Publication date: May 9, 2002Inventors: Tatsuya Nakamura, Hiroaki Kawakami, Koji Inaba, Yuji Moriki, Satoshi Handa, Katsuyuki Nonaka
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Publication number: 20020048713Abstract: An image forming method using a dry toner and exhibiting good quick-start and power economization characteristics is provided. The image forming method includes a heat-pressure fixing step using a rotatable electromagnetic induction heat-generation type heating member. The toner used therein is characterized by a moisture content of at most 3.00 wt. %, and viscoelasticities as represented by a storage modulus at 110° C. of G′ (110° C.) and a storage modulus at 140° C. of G′ (140° C.) satisfying: G′ (110° C.)≦1.00×106 dN/m2, and G′ (140° C.)≧7.00×103 dN/m3.Type: ApplicationFiled: March 27, 2001Publication date: April 25, 2002Inventors: Keiji Komoto, Hiroaki Kawakami, Tatsuhiko Chiba, Atsuyoshi Abe, Yuji Moriki, Michihisa Magome, Satoshi Handa, Kiyokazu Suzuki
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Publication number: 20020048010Abstract: A toner having a good chargeability stable against an environmental change is formed of toner particles each comprising at least a binder resin, a colorant, a release agent and a sulfur-containing polymer, and an external additive. The toner particles contain 100 to 30,000 ppm by weight thereof of at least one stabilizer element selected from the group consisting of magnesium, calcium, barium, zinc, aluminum and phosphorus. The toner particles may preferably be produced by suspension polymerization of a monomer composition containing the sulfur-containing polymer in an aqueous medium containing a dispersion stabilizer having the stabilizer element.Type: ApplicationFiled: July 27, 2001Publication date: April 25, 2002Inventors: Koji Inaba, Hiroaki Kawakami, Tatsuya Nakamura, Shinya Yachi, Yuji Moriki, Satoshi Handa, Katsuyuki Nonaka, Yoshihiro Nakagawa