Patents by Inventor Yasukazu Ayaki
Yasukazu Ayaki 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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Patent number: 9304428Abstract: Provided are a toner containing at least a binder resin and a colorant, the toner having a specific hue angle and an absorbance at a specific wavelength in reflectance spectrophotometry, and a full-color image-forming method involving the use of the toner, the method including the steps of: forming an electrostatic image on a charged electrostatic image bearing member; developing the formed electrostatic image with the toner to form a toner image; transferring the formed toner image onto a transfer material; and fixing the transferred toner image to the transfer material to form a fixed image.Type: GrantFiled: March 26, 2014Date of Patent: April 5, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Yasukazu Ayaki, Shigeto Tamura
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Publication number: 20140219684Abstract: Provided are a toner containing at least a binder resin and a colorant, the toner having a specific hue angle and an absorbance at a specific wavelength in reflectance spectrophotometry, and a full-color image-forming method involving the use of the toner, the method including the steps of: forming an electrostatic image on a charged electrostatic image bearing member; developing the formed electrostatic image with the toner to form a toner image; transferring the formed toner image onto a transfer material; and fixing the transferred toner image to the transfer material to form a fixed image.Type: ApplicationFiled: March 26, 2014Publication date: August 7, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Yasukazu Ayaki, Shigeto Tamura
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Patent number: 8728689Abstract: Provided are a toner containing at least a binder resin and a colorant, the toner having a specific hue angle and an absorbance at a specific wavelength in reflectance spectrophotometry, and a full-color image-forming method involving the use of the toner, the method including the steps of: forming an electrostatic image on a charged electrostatic image bearing member; developing the formed electrostatic image with the toner to form a toner image; transferring the formed toner image onto a transfer material; and fixing the transferred toner image to the transfer material to form a fixed image.Type: GrantFiled: December 17, 2010Date of Patent: May 20, 2014Assignee: Canon Kabushiki KaishaInventors: Yasukazu Ayaki, Shigeto Tamura
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Patent number: 8551680Abstract: Toner characterized in that assuming that the glass transition point of the toner measured by a differential scanning calorimeter (DSC) is represented by T1(° C.), in a micro compression test at T1?10 (° C.), when a load from 0.00N (0.00 mgf) to 7.85×10?4 N (80.00 mgf) is applied at the intervals of 7.85×10?7 N (0.08 mgf) to a single particle of the toner, the strain value A80a(%) at 7.85×10?4 N is 35.0 to 75.0%; and in a load (x-axis)-strain (y-axis) curve obtained by the micro compression test, the ratio of an area (S1a) of a specific region, relative to an area (S2a) of a specific region, (S1a/S2a), is 1.5 to 3.5.Type: GrantFiled: March 13, 2012Date of Patent: October 8, 2013Assignee: Canon Kabushiki KaishaInventors: Yasukazu Ayaki, Atsushi Tani, Tsuneyoshi Tominaga
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Patent number: 8383313Abstract: Provided is a toner including toner particles each containing a binder resin, a colorant, and a wax, and inorganic fine particles, the toner having such a characteristic that a temperature-storage elastic modulus curve at a high frequency shows a characteristic change in its behavior in a specific temperature region with respect to a temperature-storage elastic modulus curve at a low frequency.Type: GrantFiled: December 3, 2010Date of Patent: February 26, 2013Assignee: Canon Kabushiki KaishaInventors: Yasukazu Ayaki, Tsuneyoshi Tominaga
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Patent number: 8372573Abstract: A toner in which, in a loss tangent (tan ?) curve obtained by a dynamic viscoelasticity test, the tan ? shows a maximal value ?a in the temperature region of 28.0-60.0° C., which maximal value ?a is 0.50 or more, and shows a minimal value ?b in the temperature region of 45.0-85.0° C., which minimal value ?b is 0.60 or less, where the difference between the maximal value ?a and the minimal value ?b is 0.20 or more; and, where the temperature that affords the maximal value ?a is represented by Ta (° C.) and the temperature that affords the minimal value ?b is represented by Tb (° C.), the difference between the Ta and the Tb is 5.0-45.0° C.; and the toner having, in a storage elastic modulus (G?) curve obtained by the dynamic viscoelasticity test, a value G?a of a storage elastic modulus at the Ta, of 1.00×106-5.00×107 Pa.Type: GrantFiled: March 19, 2012Date of Patent: February 12, 2013Assignee: Canon Kabushiki KaishaInventors: Yasukazu Ayaki, Atsushi Tani, Tsuneyoshi Tominaga
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Publication number: 20120171608Abstract: A toner in which, in a loss tangent (tan ?) curve obtained by a dynamic viscoelasticity test, the tan ? shows a maximal value ?a in the temperature region of 28.0-60.0° C., which maximal value ?a is 0.50 or more, and shows a minimal value ?b in the temperature region of 45.0-85.0° C., which minimal value ?b is 0.60 or less, where the difference between the maximal value ?a and the minimal value ?b is 0.20 or more; and, where the temperature that affords the maximal value ?a is represented by Ta(° C.) and the temperature that affords the minimal value ?b is represented by Tb(° C.), the difference between the Ta and the Tb is 5.0-45.0° C.; and the toner having, in a storage elastic modulus (G?) curve obtained by the dynamic viscoelasticity test, a value G?a of a storage elastic modulus at the Ta, of 1.00×106-5.00×107 Pa.Type: ApplicationFiled: March 19, 2012Publication date: July 5, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Yasukazu Ayaki, Atsushi Tani, Tsuneyoshi Tominaga
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Publication number: 20120171607Abstract: Toner characterized in that assuming that the glass transition point of the toner measured by a differential scanning calorimeter (DSC) is represented by T1(° C.), in a micro compression test at T1?10 (° C.), when a load from 0.00N (0.00 mgf) to 7.85×10?4 N (80.00 mgf) is applied at the intervals of 7.85×10?7 N (0.08 mgf) to a single particle of the toner, the strain value A80a(%) at 7.85×10?4 N is 35.0 to 75.0%; and in a load (x-axis)-strain (y-axis) curve obtained by the micro compression test, the ratio of an area (S1a) of a specific region, relative to an area (S2a) of a specific region, (S1a/S2a), is 1.5 to 3.5.Type: ApplicationFiled: March 13, 2012Publication date: July 5, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Yasukazu Ayaki, Atsushi Tani, Tsuneyoshi Tominaga
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Publication number: 20110151373Abstract: Provided are a toner containing at least a binder resin and a colorant, the toner having a specific hue angle and an absorbance at a specific wavelength in reflectance spectrophotometry, and a full-color image-forming method involving the use of the toner, the method including the steps of: forming an electrostatic image on a charged electrostatic image bearing member; developing the formed electrostatic image with the toner to form a toner image; transferring the formed toner image onto a transfer material; and fixing the transferred toner image to the transfer material to form a fixed image.Type: ApplicationFiled: December 17, 2010Publication date: June 23, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Yasukazu Ayaki, Shigeto Tamura
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Patent number: 7943281Abstract: In a black toner having at least a binder resin and an iron-titanium composite oxide as a colorant; the iron-titanium composite oxide is contained in a specific amount; the black toner has a specific weight average particle diameter and a specific saturation magnetization; the black toner has, in X-ray diffraction thereof, a maximum peak at 2?=from 32.5 to 33.1 degrees, having a half width of 0.25 degree or less. The black toner has, in a proportion of less than 30% by number, an iron-titanium composite oxide having, in a sectional photograph of the toner, a maximum frequency of linearity within the range where the linearity is smaller than 2.4 and having a linearity of 3.0 or more, in regard to the number frequency distribution of the linearity of the iron-titanium composite oxide.Type: GrantFiled: April 14, 2006Date of Patent: May 17, 2011Assignee: Canon Kabushiki KaishaInventors: Takaaki Kaya, Yasukazu Ayaki, Shigeto Tamura, Yayoi Tazawa, Ryoichi Fujita, Yuichi Yajima
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Publication number: 20110081609Abstract: Provided is a toner including toner particles each containing a hinder resin, a colorant, and a wax, and inorganic fine particles, the toner having such a characteristic that a temperature-storage elastic modulus curve at a high frequency shows a characteristic change in its behavior in a specific temperature region with respect to a temperature-storage elastic modulus curve at a low frequency.Type: ApplicationFiled: December 3, 2010Publication date: April 7, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Yasukazu Ayaki, Tsuneyoshi Tominaga
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Patent number: 7858282Abstract: Provided is a toner including toner particles each containing a binder resin, a colorant, and a wax, and inorganic fine particles, the toner having such a characteristic that a temperature-storage elastic modulus curve at a high frequency shows a characteristic change in its behavior in a specific temperature region with respect to a temperature-storage elastic modulus curve at a low frequency.Type: GrantFiled: February 17, 2010Date of Patent: December 28, 2010Assignee: Canon Kabushiki KaishaInventors: Yasukazu Ayaki, Tsuneyoshi Tominaga
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Publication number: 20100143834Abstract: Provided is a toner including toner particles each containing a binder resin, a colorant, and a wax, and inorganic fine particles, the toner having such a characteristic that a temperature-storage elastic modulus curve at a high frequency shows a characteristic change in its behavior in a specific temperature region with respect to a temperature-storage elastic modulus curve at a low frequency.Type: ApplicationFiled: February 17, 2010Publication date: June 10, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Yasukazu Ayaki, Tsuneyoshi Tominaga
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Patent number: 7718338Abstract: A charge control resin containing a copolymer which has a unit having a sulfonic acid ester group having a specific structure and has the unit in specific proportions. The charge control resin can provide a toner with superior charging performance. Also disclosed is a toner having such a charge control resin.Type: GrantFiled: March 24, 2006Date of Patent: May 18, 2010Assignee: Canon Kabushiki KaishaInventors: Norikazu Fujimoto, Yasukazu Ayaki, Shigeto Tamura, Tetsuya Yano
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Publication number: 20090291383Abstract: Toner characterized in that assuming that the glass transition point of the toner measured by a differential scanning calorimeter (DSC) is represented by T1 (° C.), in a micro compression test at T1?10 (° C.), when a load from 0.00 N (0.00 mgf) to 7.85×10?4 N (80.00 mgf) is applied at the intervals of 7.85×10?7 N (0.08 mgf) to a single particle of the toner, the strain value A80a (%) at 7.85×10?4 N is 35.0 to 75.0%; and in a load (x-axis)-strain (y-axis) curve obtained by the micro compression test, the ratio of an area (S1a) of a specific region, relative to an area (S2a) of a specific region, (S1a/S2a), is 1.5 to 3.5.Type: ApplicationFiled: July 29, 2009Publication date: November 26, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Yasukazu Ayaki, Atsushi Tani, Tsuneyoshi Tominaga
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Publication number: 20090291380Abstract: A toner in which, in a loss tangent (tan ?) curve obtained by a dynamic viscoelasticity test, the tan ? shows a maximal value ?a in the temperature region of 28.0-60.0° C., which maximal value ?a is 0.50 or more, and shows a minimal value ?b in the temperature region of 45.0-85.0° C., which minimal value ?b is 0.60 or less, where the difference between the maximal value ?a and the minimal value ?b is 0.20 or more; and, where the temperature that affords the maximal value ?a is represented by Ta(° C.) and the temperature that affords the minimal value ?b is represented by Tb(° C.), the difference between the Ta and the Tb is 5.0-45.0° C.; and the toner having, in a storage elastic modulus (G?) curve obtained by the dynamic viscoelasticity test, a value G?a of a storage elastic modulus at the Ta, of 1.00×106-5.00×107 Pa.Type: ApplicationFiled: July 29, 2009Publication date: November 26, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Yasukazu Ayaki, Atsushi Tani, Tsuneyoshi Tominaga
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Publication number: 20090011353Abstract: In a black toner having at least a binder resin and an iron-titanium composite oxide as a colorant; the iron-titanium composite oxide is contained in a specific amount; the black toner has a specific weight average particle diameter and a specific saturation magnetization; the black toner has, in X-ray diffraction thereof, a maximum peak at 2?=from 32.5 to 33.1 degrees, having a half width of 0.25 degree or less. The black toner has, in a proportion of less than 30% by number, an iron-titanium composite oxide having, in a sectional photograph of the toner, a maximum frequency of linearity within the range where the linearity is smaller than 2.4 and having a linearity of 3.0 or more, in regard to the number frequency distribution of the linearity of the iron-titanium composite oxide.Type: ApplicationFiled: April 14, 2006Publication date: January 8, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Takaaki Kaya, Yasukazu Ayaki, Shigeto Tamura, Yayoi Tazawa, Ryoichi Fujita, Yuichi Yajima
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Publication number: 20080247788Abstract: Provided are a toner containing at least a binder resin and a colorant, the toner having a specific hue angle and an absorbance at a specific wavelength in reflectance spectrophotometry, and a full-color image-forming method involving the use of the toner, the method including the steps of: forming an electrostatic image on a charged electrostatic image bearing member; developing the formed electrostatic image with the toner to form a toner image; transferring the formed toner image onto a transfer material; and fixing the transferred toner image to the transfer material to form a fixed image.Type: ApplicationFiled: June 5, 2008Publication date: October 9, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Yasukazu Ayaki, Shigeto Tamura
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Patent number: 7381509Abstract: The present invention provides: a toner kit having a deep toner and a pale toner which are separated from each other, wherein: the deep toner and the pale toner satisfy prescribed conditions for an L*a*b* color coordinate system where a* represents a hue in the red-green direction, b* represents a hue in the yellow-blue direction, and L* represents a lightness; the pale toner and the deep toner to be used in the toner kit; and a method for forming an image using the toner kit. Thus, the present invention can form a high quality image, while suppressing graininess and roughness over the areas covering from the low density area to the high density area.Type: GrantFiled: August 28, 2007Date of Patent: June 3, 2008Assignee: Canon Kabushiki KaishaInventors: Yasukazu Ayaki, Takeshi Ikeda, Tomohito Ishida, Nobuyuki Itoh
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Publication number: 20080118854Abstract: A charge control resin containing a copolymer which has a unit having a sulfonic acid ester group having a specific structure and has the unit in specific proportions. The charge control resin can provide a toner with superior charging performance. Also disclosed is a toner having such a charge control resin.Type: ApplicationFiled: March 24, 2006Publication date: May 22, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Norikazu Fujimoto, Yasukazu Ayaki, Shigeto Tamura, Tetsuya Yano