Patents by Inventor Hiroaki Katoh
Hiroaki Katoh 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: 20080038656Abstract: A negatively-chargeable non-magnetic one-component developer for developing an electrostatic latent image using a contact DC-bias development method, having a capacitance of 1.05×10?12 to 1.25×10?12 F, a volume resistivity of 5.0×1010 to 5.0×1012 ?·cm and a dielectric loss tangent of 1.0×10?3 to 2.0×10?2. In a contact DC-bias development method, the developer has a capacitance of 1.30×10?12 to 1.60×10?12 F, a resistivity of 5.0×109 to 5.0×1010 ?·cm and a dielectric loss tangent of 1.0×10?3 to 2.0×10?2. In a non-contact DC/AC-bias development method, the developer has a capacitance of 1.45×10?12 to 1.60×10?12 F, a resistivity of 5.0×109 to 1.0×1010 ?·cm and a dielectric loss tangent of 1.0×10?3 to 2.0×10?2.Type: ApplicationFiled: January 18, 2007Publication date: February 14, 2008Inventors: Hideaki YASUNAGA, Minoru Nakamura, Masayuki Hagi, Takuya Kadota, Hiroaki Katoh, Yoshihiro Mikuriya, Katsunori Kurose, Atsushi Yamamoto, Masahide Inoue
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Publication number: 20070238042Abstract: An oilless-fixing toner is provided for use in a vertical image developer including a toner feeder feeding the oilless-fixing toner vertically below; a developing roller located vertically below the toner feeder; and a screw blade agitating the oilless-fixing toner, wherein the oilless-fixing toner contains: a resin including a wax; a colorant; and an external additive, wherein a total energy determined from a torque and a load of the screw blade is from 450 to 530 mJ when rotating in the oilless-fixing toner at 100 mm/s, and a ratio of total energy at 10 mm/s to total energy at 100 mm/s is from 2.0 to 3.0.Type: ApplicationFiled: April 5, 2007Publication date: October 11, 2007Inventors: Hideaki Yasunaga, Hiroaki Katoh, Masayuki Hagi, Takuya Kadota, Yoshimichi Ishikawa, Hiroyuki Murakami, Katsunori Kurose, Yoshihiro Mikuriya
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Publication number: 20070190443Abstract: A toner including toner particles including a binder resin, a colorant and a release agent, and an external additive including a first particulate inorganic material having a formula of MgxSiyOx+2y where each of x and y is an integer, and a number average secondary particle diameter of from 0.02 ?m to 2 ?m, wherein the first atomic ratio (Mg/Si) s in a surface portion of the first particulate inorganic material is not greater than (preferably less than) the second atomic ratio (Mg/Si)e in the entire first particulate inorganic material. Alternatively, a toner including toner particles including a binder resin and a colorant, and an external additive which includes a particulate inorganic material having a formula of MgxSiyOx+2y where each of x and y is an integer and which has a surface treated with a fatty acid.Type: ApplicationFiled: February 1, 2007Publication date: August 16, 2007Inventors: Masayuki Hagi, Takuya Kadota, Hiroaki Katoh, Atsushi Yamamoto, Katsunori Kurose, Yoshihiro Mikuriya, Masahide Inoue, Hideaki Yasunaga, Minoru Nakamura, Yoshimichi Ishikawa, Hiroyuki Murakami
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Publication number: 20070122729Abstract: A toner is provided including a colorant; a resin composition (A) comprising at least one binder resin and a hydrocarbon wax having a melting point of 70-90° C. in an amount of from 6 to 30% by weight based on total weight of resin composition (A), and having a softening point (T1/2(A)) of from 120 to 150° C.; and a resin composition (B) having a softening point (T1/2 (B)) of from 100 to 130° C., wherein a weight ratio of the resin composition (A) to the resin composition (B) is from 10/90 to 45/55, and the following relationship is satisfied: T1/2(A)?T1/2(B)+3; and the use of the toner in an image forming method, an image forming apparatus, and a process cartridge.Type: ApplicationFiled: November 28, 2006Publication date: May 31, 2007Inventors: Hiroaki Katoh, Masayuki Hagi, Takuya Kadota, Yoshihiro Mikuriya, Katsunori Kurose, Atsushi Yamamoto, Masahide Inoue, Minoru Nakamura, Chiyoshi Nozaki, Tsuyoshi Nozaki, Hideaki Yasunaga
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Patent number: 7222794Abstract: An optical reader capable of reading a bar code in a mounted state when an article carrying the bar code passes and of reading bar codes set in array on a menu sheet in a hand-held state has been disclosed. The optical reader comprises a light source, a scanner that is driven by a drive and scans light emanating from the light source, a plurality of reflection mirrors that reflect scanning light scanned by the scanner and create a scanning pattern composed of a plurality of scan trajectories, a read window through which scanning light reflected from the reflection mirrors is emitted, and a light receiver for receiving light reflected from a mark. The optical reader further comprises a mode changer for changing a plurality of operation modes among which one or ones of the plurality of scan trajectories to be validated for reading are different.Type: GrantFiled: September 5, 2002Date of Patent: May 29, 2007Assignee: Fujitsu LimiteedInventors: Toshimitsu Kumagai, Mitsuharu Ishii, Yuichirou Takashima, Hiroaki Katoh, Toshitaka Aoki
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Publication number: 20070026335Abstract: A toner containing a binder resin containing a resin having a polyester skeleton, a wax containing a hydrocarbon based wax, a colorant, and a charge controlling agent represented by the following chemical structure, wherein the toner has at least one endothermic peak in a range of from 60 to 80 ° C. when measured by a differential scanning calorimetry (DSC). In the chemical structure, M represents one of Li, Na and K, R1, R2, R3 and R4 each, independently, represent one 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, and n represents an integer of from 1 to 5, and when n is from 2 to 5, each of R1, R2, R3 and R4 can be different from the other.Type: ApplicationFiled: August 1, 2006Publication date: February 1, 2007Inventors: Atsushi Yamamoto, Yoshihiro Mikuriya, Katsunori Kurose, Masayuki Hagi, Takuya Kadota, Hiroaki Katoh, Masahide Inoue
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Publication number: 20060292474Abstract: A toner including a binder resin, a wax, and a colorant, wherein particles of the wax having a particle diameter of less than 1.00 ?m are included in the toner in an amount of not less than 35% by number and less than 55% by number, and wherein the wax has a particle diameter distribution property such that when particle diameters of particles of the wax are classified into ranges having a width of 0.05 ?m, the wax has a particle diameter mode value that is not less than 0.75 ?m and less than 1.00 ?m; and a fixing method and an image forming method using the above toner.Type: ApplicationFiled: June 19, 2006Publication date: December 28, 2006Inventors: Yoshihiro Mikuriya, Atsushi Yamamoto, Hiroaki Katoh, Takuya Kadota, Masayuki Hagi, Katsunori Kurose, Masahide Inoue
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Publication number: 20060210902Abstract: A toner including a binder resin, a colorant and a release agent, and satisfying the following relationships (1) and (2): 1.0?FT120/FT160?1.5??(1) wherein FT120 is a maximum tensile strength (N) when a recording medium having the toner unfixed on is vertically separated from the surface of a substrate having a temperature of 120° C. at a constant speed after pressed thereto at a pressure of 100 kPa, and FT160 is same except that the substrate has a temperature of 160° C.; 1.0?FP100/FP200?1.5??(2) wherein FP100 is a maximum tensile strength (N) when a recording medium having the toner unfixed on is vertically separated from the surface of a substrate having a temperature of 160° C. at a constant speed after pressed thereto at a pressure of 100 kPa, and FP200 is same except that the pressure is 200 kPa.Type: ApplicationFiled: March 20, 2006Publication date: September 21, 2006Inventors: Minoru Nakamura, Chiyoshi Nozaki, Yoshihiro Mikuriya, Tsuyoshi Nozaki, Atsushi Yamamoto, Masayasu Hagi, Takuya Kadota, Hiroaki Katoh, Masahide Inoue
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Patent number: 7055150Abstract: An install apparatus installs printer firmware to a printer through a network in the background of normal print jobs. The Printer (4) includes a storage means (22) to store the firmware consisting of a plurality of blocks, and a processing means (20) for receiving the blocks to store to storage means (22). In case an interruption occurs during the firmware installation and at the time of resuming the installation, the processing means (20) informs install apparatus (6) of a guarantee range of the installed blocks being determined from the data stored in storage means (22). The install apparatus then restarts transferring the firmware from the succeeding transfer block of the guarantee range.Type: GrantFiled: November 13, 2001Date of Patent: May 30, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Hirotomo Terada, Yoshinobu Nakamura, Kota Ariyama, Hiroaki Katoh
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Patent number: 7048188Abstract: An optical reader capable of reading a bar code in a mounted state when an article carrying the bar code passes and of reading bar codes set in array on a menu sheet in a hand-held state has been disclosed. The optical reader comprises a light source, a scanner that is driven by a drive and scans light emanating from the light source, a plurality of reflection mirrors that reflect scanning light scanned by the scanner and create a scanning pattern composed of a plurality of scan trajectories, a read window through which scanning light reflected from the reflection mirrors is emitted, and a light receiver for receiving light reflected from a mark. The optical reader further comprises a mode changer for changing a plurality of operation modes among which one or ones of the plurality of scan trajectories to be validated for reading are different.Type: GrantFiled: September 5, 2002Date of Patent: May 23, 2006Assignee: Fujitsu LimitedInventors: Toshimitsu Kumagai, Mitsuharu Ishii, Yuichirou Takashima, Hiroaki Katoh, Toshitaka Aoki
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Patent number: 6899274Abstract: An optical reader capable of reading a bar code in a mounted state when an article carrying the bar code passes and of reading bar codes set in array on a menu sheet in a hand-held state has been disclosed. The optical reader comprises a light source, a scanner that is driven by a drive and scans light emanating from the light source, a plurality of reflection mirrors that reflect scanning light scanned by the scanner and create a scanning pattern composed of a plurality of scan trajectories, a read window through which scanning light reflected from the reflection mirrors is emitted, and a light receiver for receiving light reflected from a mark. The optical reader further comprises a mode changer for changing a plurality of operation modes among which one or ones of the plurality of scan trajectories to be validated for reading are different.Type: GrantFiled: September 5, 2002Date of Patent: May 31, 2005Assignee: Fujitsu LimitedInventors: Toshimitsu Kumagai, Mitsuharu Ishii, Yuichirou Takashima, Hiroaki Katoh, Toshitaka Aoki
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Patent number: 6860426Abstract: An optical reader capable of reading a bar code in a mounted state when an article carrying the bar code passes and of reading bar/codes set in array on a menu sheet in a hand-held state has been disclosed. The optical reader comprises a light source, a scanner that is driven by a drive and scans light emanating from the light source, a plurality of reflection mirrors that reflect scanning light scanned by the scanner and create a scanning pattern composed of a plurality of scan trajectories, a read window through which scanning light reflected from the reflection mirrors is emitted, and a light receiver for receiving light reflected from a mark. The optical reader further comprises a mode changer for changing a plurality of operation modes among which one or ones of the plurality of scan trajectories to be validated for reading are different.Type: GrantFiled: May 16, 2003Date of Patent: March 1, 2005Assignee: Fujitsu LimitedInventors: Toshimitsu Kumagai, Mitsuhara Ishii, Yuichirou Takashima, Hiroaki Katoh, Toshitaka Aoki
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Patent number: 6811086Abstract: An optical read is capable of reading a bar code in a mounted state when an article carrying the bar code passes and of reading bar codes set in an array format on a menu sheet in a hand-held state. The optical reader comprises a light source, a scanner that is driven by a drive and scans light emanating from the light source, a plurality of reflection mirrors that reflect scanning light scanned by the scanner and create a scanning pattern composed of a plurality of scan trajectories, a read window through which scanning light reflected from the reflection mirrors is emitted, and a light receiver for receiving light reflected from a mark. The optical reader further comprises a mode changer (or control unit) for changing a plurality of operation modes among which one or ones of the plurality of scan trajectories to be validated for reading are different.Type: GrantFiled: January 8, 1999Date of Patent: November 2, 2004Assignee: Fujitsu LimitedInventors: Toshimitsu Kumagai, Mitsuharu Ishii, Yuichirou Takashima, Hiroaki Katoh, Toshitaka Aoki
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Publication number: 20030201329Abstract: An optical reader capable of reading a bar code in a mounted state when an article carrying the bar code passes and of reading bar codes set in array on a menu sheet in a hand-held state has been disclosed. The optical reader comprises a light source, a scanner that is driven by a drive and scans light emanating from the light source, a plurality of reflection mirrors that reflect scanning light scanned by the scanner and create a scanning pattern composed of a plurality of scan trajectories, a read window through which scanning light reflected from the reflection mirrors is emitted, and a light receiver for receiving light reflected from a mark. The optical reader further comprises a mode changer for changing a plurality of operation modes among which one or ones of the plurality of scan trajectories to be validated for reading are different.Type: ApplicationFiled: May 16, 2003Publication date: October 30, 2003Applicant: Fujitsu LimitedInventors: Toshimitsu Kumagai, Mitsuharu Ishii, Yuichirou Takashima, Hiroaki Katoh, Toshitaka Aoki
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Patent number: 6527185Abstract: In a bar-code reading apparatus, an enclosure is provided with various mechanisms, includes a hand-holding portion and a reading portion having a reading window. Projections are provided at two sides of the enclosure, and a cable extends out from one of the projections. The projections engage with supporting-point cut-out portions of supporting portions in a stand, in a stationary condition. The reading window is therefore located lower than the hand-holding portion.Type: GrantFiled: January 29, 2002Date of Patent: March 4, 2003Assignee: Fujitsu LimitedInventors: Hiroaki Katoh, Mitsuharu Ishii, Toshimitsu Kumagai, Yuichirou Takashima
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Publication number: 20030020938Abstract: An install apparatus installs printer firmware to a printer through a network in the background of normal print jobs. The Printer (4) includes a storage means (22) to store the firmware consisting of a plurality of blocks, and a processing means (20) for receiving the blocks to store to storage means (22). In case an interruption occurs during the firmware installation and at the time of resuming the installation, the processing means (20) informs install apparatus (6) of a guarantee range of the installed blocks being determined from the data stored in storage means (22). The install apparatus then restarts transferring the firmware from the succeeding transfer block of the guarantee range.Type: ApplicationFiled: November 13, 2001Publication date: January 30, 2003Applicant: FUJITSU LIMITEDInventors: Hirotomo Terada, Yoshinobu Nakamura, Kota Ariyama, Hiroaki Katoh
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Publication number: 20030006286Abstract: An optical reader capable of reading a bar code in a mounted state when an article carrying the bar code passes and of reading bar codes set in array on a menu sheet in a hand-held state has been disclosed. The optical reader comprises a light source, a scanner that is driven by a drive and scans light emanating from the light source, a plurality of reflection mirrors that reflect scanning light scanned by the scanner and create a scanning pattern composed of a plurality of scan trajectories, a read window through which scanning light reflected from the reflection mirrors is emitted, and a light receiver for receiving light reflected from a mark. The optical reader further comprises a mode changer for changing a plurality of operation modes among which one or ones of the plurality of scan trajectories to be validated for reading are different.Type: ApplicationFiled: September 5, 2002Publication date: January 9, 2003Applicant: Fujitsu LimitedInventors: Toshimitsu Kumagai, Mitsuhara Ishii, Yuichirou Takashima, Hiroaki Katoh, Toshitaka Aoki
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Publication number: 20030001014Abstract: An optical reader capable of reading a bar code in a mounted state when an article carrying the bar code passes and of reading bar codes set in array on a menu sheet in a hand-held state has been disclosed. The optical reader comprises a light source, a scanner that is driven by a drive and scans light emanating from the light source, a plurality of reflection mirrors that reflect scanning light scanned by the scanner and create a scanning pattern composed of a plurality of scan trajectories, a read window through which scanning light reflected from the reflection mirrors is emitted, and a light receiver for receiving light reflected from a mark. The optical reader further comprises a mode changer for changing a plurality of operation modes among which one or ones of the plurality of scan trajectories to be validated for reading are different.Type: ApplicationFiled: September 5, 2002Publication date: January 2, 2003Applicant: Fujitsu LimitedInventors: Toshimitsu Kumagai, Mitsuharu Ishii, Yuichirou Takashima, Hiroaki Katoh, Toshitaka Aoki
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Publication number: 20020195497Abstract: An optical reader capable of reading a bar code in a mounted state when an article carrying the bar code passes and of reading bar codes set in array on a menu sheet in a hand-held state has been disclosed. The optical reader comprises a light source, a scanner that is driven by a drive and scans light emanating from the light source, a plurality of reflection mirrors that reflect scanning light scanned by the scanner and create a scanning pattern composed of a plurality of scan trajectories, a read window through which scanning light reflected from the reflection mirrors is emitted, and a light receiver for receiving light reflected from a mark. The optical reader further comprises a mode changer for changing a plurality of operation modes among which one or ones of the plurality of scan trajectories to be validated for reading are different.Type: ApplicationFiled: September 5, 2002Publication date: December 26, 2002Applicant: Fujitsu LimitedInventors: Toshimitsu Kumagai, Mitsuharu Ishii, Yuichirou Takashima, Hiroaki Katoh, Toshitaka Aoki
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Patent number: 6435413Abstract: An optical reader capable of reading a bar code in a mounted state when an article carrying the bar code passes and of reading bar codes set in array on a menu sheet in a hand-held state has been disclosed. The optical reader includes a light source, a scanner that is driven by a drive and scans light emanating from the light source, a plurality of reflection mirrors that reflect scanning light scanned by the scanner and create a scanning pattern composed of a plurality of scan trajectories, a read window through which scanning light reflected from the reflection mirrors is emitted, and a light receiver for receiving light reflected from a mark.Type: GrantFiled: January 8, 1999Date of Patent: August 20, 2002Assignee: Fujitsu LimitedInventors: Toshimitsu Kumagai, Mitsuharu Ishii, Yuichirou Takashima, Hiroaki Katoh, Toshitaka Aoki