Patents by Inventor Takahiro Honda
Takahiro Honda 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).
-
Patent number: 8956795Abstract: A toner for developing an electrostatic image, including: toner base particles each including a binder resin and a releasing agent; and inorganic fine particles, wherein the toner includes the inorganic fine particles as an external additive on a surface of the toner base particle, wherein the toner base particles have a BET specific surface area of 2.5 m2/g to 5.0 m2/g, and wherein the inorganic fine particles comprise inorganic fine particles (A) which are each a secondary particle where a plurality of primary particles are coalesced together.Type: GrantFiled: March 11, 2013Date of Patent: February 17, 2015Assignee: Ricoh Company, Ltd.Inventors: Satoshi Kojima, Tsuneyasu Nagatomo, Syouko Satoh, Osamu Uchinokura, Junichi Awamura, Satoshi Ogawa, Takahiro Honda, Daisuke Ito, Teruki Kusahara, Masaki Watanabe, Daisuke Inoue, Kiwako Hirohara
-
Patent number: 8948631Abstract: An image forming apparatus has a memory, an image forming unit, an intermediate transfer member, a density detector, a background density measurer, a test patch controlling unit and a density correcting unit. The density detector detects the density of the intermediate transfer member. The background density measurer stores background density, in the memory in correspondence with position information on the intermediate transfer member at a predetermined timing before a calibration for adjusting image formation density. The test patch controlling unit causes the image forming unit to form a test patch, on the intermediate transfer member while the intermediate transfer member is driven at a predetermined speed. The density correcting unit executes the calibration to adjust image formation density according to a difference between the background density stored in the memory when executing the calibration and corresponding to the position and density of the test patch.Type: GrantFiled: April 21, 2011Date of Patent: February 3, 2015Assignee: Kyocera Mita CorporationInventor: Takahiro Honda
-
Publication number: 20150030366Abstract: An image forming apparatus includes an image forming portion, a curling correction portion, a curling direction determination portion, and a rotation control portion. The image forming portion forms an image on a recording medium. The curling direction determination portion determine a direction of curling in a recording medium in which images forms on both surfaces thereof, based on an image density of each of both surfaces of the recording medium in which the images forms on both surfaces thereof. The rotation control portion is configured to rotate the curling correction portion such that the curling correction portion is set in an orientation for correcting the curling that has occurred in the recording medium, in a direction opposite to the direction of the curling determined by the curling direction determination portion.Type: ApplicationFiled: July 18, 2014Publication date: January 29, 2015Inventors: Takahiro Honda, Kenji Miyamoto, Mari Kokomoto
-
Publication number: 20150003883Abstract: An image forming apparatus according to one aspect of the present disclosure includes an image forming portion, a curling correction portion, and a speed control portion. The image forming portion forms an image on a recording medium. The curling correction portion has one pair of rollers composed of members that respectively have different elasticities and are pressed against each other, and corrects curling that has occurred in the recording medium after image formation performed thereon by the image forming portion, by conveying the recording medium sandwiched with the roller pair. The speed control portion changes a conveyance speed of the recording medium by the roller pair based on a density value of an image formed on the recording medium.Type: ApplicationFiled: June 25, 2014Publication date: January 1, 2015Inventors: Takahiro Honda, Kenji Miyamoto, Mari Kokomoto
-
Publication number: 20140294405Abstract: An image forming apparatus according to one aspect of the present disclosure includes print engine portion, paper sheet detectors, and control portion. Control portion stop paper sheet conveyance, when detecting occurrence of jam. Control portion determines fixing nip position which is position of the fixing nip portion on fixing stop paper sheet, on basis of outputs of paper sheet detectors. When fixing nip position is located at leading end side half of fixing stop paper sheet in paper sheet conveying direction, control portion rotates fixing motor in reverse direction to convey fixing stop paper sheet to upstream side in paper sheet conveying direction. When fixing nip position is located at rear end side half of fixing stop paper sheet in paper sheet conveying direction, control portion rotates fixing motor in a forward direction to convey fixing stop paper sheet toward a downstream side in paper sheet conveying direction.Type: ApplicationFiled: March 26, 2014Publication date: October 2, 2014Applicant: KYOCERA Document Solutions Inc.Inventors: Kenji Miyamoto, Takahiro Honda, Mari Kokomoto
-
Publication number: 20140243320Abstract: A compound represented by the following general formula (1) or a salt thereof. R1 represents a halogen atom and so on; R2 and R3 each represent a hydrogen atom and so on; R4 and R5 each represent a hydrogen atom and so on, or R4 and R5 may form an oxo group; Ra and Rb each represent a lower alkyl group optionally having a substituent and so on, or they may bind to each other to form a nitrogen-containing heterocyclic ring which may be substituted by one or plural Rc; Rc represents an aryl group optionally having a substituent and so on; ring A represents a benzene ring and so on; and m represents 0, 1 or 2.Type: ApplicationFiled: July 12, 2012Publication date: August 28, 2014Applicant: SANTEN PHARMACEUTICAL CO., LTD.Inventors: Takahiro Honda, Hiroshi Enomoto, Kenji Kawashima, Shinji Takaoka, Yasutaka Fujioka, Mamoru Matsuda, Koji Ohashi, Yukie Fujita, Shin-ichiro Hirai, Hiroaki Kurashima
-
Patent number: 8795938Abstract: To provide a toner, which contains: toner base particles each containing a binder resin and a colorant; and an external additive containing inorganic particles and fatty acid metal salt particles, wherein the inorganic particles contain at least hydrophobic silica particles, wherein a liberation ratio Ya of the hydrophobic silica particles from the toner is 1% by mass to 20% by mass, and wherein a libration ratio Yb of the fatty acid metal salt particles from the toner is 30% by mass to 90% by mass.Type: GrantFiled: January 17, 2013Date of Patent: August 5, 2014Assignee: Ricoh Company, Ltd.Inventors: Osamu Uchinokura, Tomoyuki Satoh, Takahiro Honda, Daisuke Inoue, Mamoru Hozumi
-
Patent number: 8778588Abstract: To provide a toner, which contains a binder resin, a colorant, and a releasing agent, wherein the binder resin contains a low molecular weight resin component, where the low molecular weight resin component has a resin softening coefficient (A), represented by the following formula (1), satisfying A>0.165, and has storage elastic modulus (dyne/cm2) G?(Tfb) satisfying G?(Tfb)?1×104 where Tfb is a flow onset temperature (° C.) of the low molecular weight resin component as measured by a capillary rheometer: A=|[(r1)?ln G?(r2)]/(T1?T2)|??Formula (1) (where T1 is temperature (° C.) at which storage elastic modulus G?(r1) is 1×105 (dyne/cm2) and T2 is temperature (° C.) at which storage elastic modulus G?(r2) is 1×103 (dyne/cm2) as measured by means of a viscoelasticity measuring device with measuring frequency of 1 Hz, and measuring distortion of 1 deg; and | | represents an absolute value.).Type: GrantFiled: October 12, 2011Date of Patent: July 15, 2014Assignee: Ricoh Company, Ltd.Inventors: Teruki Kusahara, Junichi Awamura, Tsuyoshi Sugimoto, Hyo Shu, Tomomi Suzuki, Osamu Uchinokura, Takahiro Honda, Satoshi Kojima, Satoshi Ogawa, Daisuke Inoue, Koshi Sato, Daisuke Ito, Ryuuta Yoshida, Syouko Satoh
-
Patent number: 8758972Abstract: A toner produced by a method including dissolving or dispersing toner components comprising a resin, a colorant, and a release agent in a solvent to prepare a toner components liquid, discharging the toner components liquid from multiple nozzles provided on a thin film by vibrating the thin film by a mechanical vibration unit to form liquid droplets, and drying the liquid droplets into solid particles of the toner. The particle diameter distribution that is a ratio of a weight average particle diameter to a number average particle diameter of the toner is between 1.00 and 1.15, and a weight average particle diameter of the release agent in the toner is between 1% and 30% of an aperture diameter of the nozzle.Type: GrantFiled: July 6, 2009Date of Patent: June 24, 2014Assignee: Ricoh Company, LimitedInventors: Takahiro Honda, Yohichiroh Watanabe, Yoshihiro Norikane, Shinji Ohtani
-
Patent number: 8748072Abstract: A method for producing a toner, including ejecting a toner composition liquid containing at least a resin and a colorant periodically from a plurality of nozzles into a chamber using a vibration unit, so as to form droplets in a gas phase; and solidifying the droplets, wherein the droplets are transported by transport air flow selected from at least one of vertical downward air flow and rotational air flow, and the method can prevent toner particles from aggregation.Type: GrantFiled: June 22, 2009Date of Patent: June 10, 2014Assignee: Ricoh Company, Ltd.Inventors: Takahiro Honda, Yukio Tabata, Yohichiroh Watanabe, Kazumi Suzuki, Shinji Ohtani, Yoshihiro Norikane
-
Publication number: 20140140731Abstract: A toner including: a binder resin; a releasing agent; and a colorant, wherein the binder resin contains a crystalline polyester resin and a non-crystalline polyester resin, wherein the releasing agent has an endothermic peak temperature of 60° C. to 80° C. at the second temperature rising in differential scanning calorimetry, and wherein the releasing agent is an ester wax which satisfies the following expressions (1) and (2): 1.1 Pa·s??*a?2.0 Pa·s . . . Expression (1) 0.001??*b/?*a?1.00 . . . Expression (2) where in Expressions (1) and (2), ?*a denotes a complex viscosity (Pa·s) determined by measuring a dynamic viscoelasticity of the releasing agent at a measurement frequency of 6.28 rad/s, and ?*b denotes a complex viscosity (Pa·s) determined by measuring a dynamic viscoelasticity of the releasing agent at a measurement frequency of 62.8 rad/s.Type: ApplicationFiled: July 3, 2012Publication date: May 22, 2014Inventors: Mamoru Hozumi, Junichi Awamura, Teruki Kusahara, Daisuke Ito, Satoshi Ogawa, Takahiro Honda, Kiwako Hirohara, Osamu Uchinokura, Satoshi Kojima, Syouko Satoh, Tsuneyasu Nagatomo, Masaki Watanabe, Masaaki Oka, Yasuaki Ohta
-
Patent number: 8703375Abstract: To provide a toner A containing: base particles, each containing polyester, microcrystalline wax, and a colorant; and spherical silica particles having an average primary particle diameter of 100 nm to 150 nm, wherein the microcrystalline wax has an onset temperature of 45° C. to 60° C. as determined by DSC, and a carbon number distribution of 25 to 55.Type: GrantFiled: July 22, 2011Date of Patent: April 22, 2014Assignee: Ricoh Company, Ltd.Inventors: Naohito Shimota, Takahiro Honda, Tsuneyasu Nagatomo, Ryuta Chiba
-
Patent number: 8614043Abstract: A toner including a core particle, an inner shell layer covering the core, and an outer shell layer covering the inner shell layer is provided. The core particle includes a resin P. The inner shell layer includes fine particles of a resin A. The outer shell layer includes fine particles of a resin B. The toner satisfies the following formulae (1) to (3): 4.5?T½(P)?Tfb(P)?14??(1) 20?T½(A)?Tfb(A)?40??(2) 23.5?T½(B)?Tfb(B)?40??(3) wherein T½(P), T½(A), and T½(B) represent ½ method temperatures of the resins P, A, and B, respectively, and Tfb(P), Tfb(A), and Tfb(B) represent flow beginning temperatures of the resins P, A, and B, respectively, and wherein the ½ method temperatures and the flow beginning temperatures are measured by a flowtester.Type: GrantFiled: November 1, 2012Date of Patent: December 24, 2013Assignee: Ricoh Company, Ltd.Inventors: Masaki Watanabe, Osamu Uchinokura, Junichi Awamura, Takahiro Honda, Satoshi Ogawa, Tsuneyasu Nagatomo, Hiroshi Yamashita
-
Patent number: 8568628Abstract: A method of preparing a toner, including periodically dripping and discharging droplets of a toner constituent liquid comprising a resin and a colorant with a dripper comprising a thin film comprising plural nozzles configured to discharge the droplets, and an electromechanical converter configured to oscillate the thin film; and solidifying the droplets to form toner particles, wherein the nozzle has an aperture discharging the droplet, having a circular or an ellipsoidal cross-sectional shape and cross-sectional area smaller than a cross-sectional area of another aperture contacting the toner constituent liquid.Type: GrantFiled: May 14, 2008Date of Patent: October 29, 2013Assignee: Ricoh Company, Ltd.Inventors: Yoshihiro Norikane, Shinji Ohtani, Yohichiroh Watanabe, Kazumi Suzuki, Takahiro Honda
-
Publication number: 20130244155Abstract: A toner including: toner base particles; and an external additive, the toner base particles each comprising a binder resin and a colorant, wherein the external additive comprises non-spherical particles and spherical particles, wherein the non-spherical particles are each a secondary particle in which spherical primary particles are coalesced together, and wherein the non-spherical particles and the spherical particles in the external additive satisfy a relationship expressed by the following formula (1): 3Ca(%)<Cb(%)??Formula (1) where Ca is greater than 10% but smaller than 20% and Cb is greater than 40% but smaller than 70%, and Ca and Cb are values given by: Ca = ( an ? ? amount ? ? of ? ? the ? ? non ? - ? spherical ? ? particles ? ? ( % ? ? by ? ? mass ) / 100 ) × ( a ? ? projected ? ? area ? ? of ? ? the ? ? non ? - ? spherical ? ? particles ? ? ( cm 2 ? / ? g ) ) ( an ? ? amount ? ? of ?Type: ApplicationFiled: March 8, 2013Publication date: September 19, 2013Inventors: Syouko Satoh, Tsuneyasu Nagatomo, Satoshi Kojima, Osamu Uchinokura, Junichi Awamura, Daisuke Ito, Satoshi Ogawa, Kiwako Hirohara, Takahiro Honda, Daisuke Inoue
-
Publication number: 20130244156Abstract: A toner for developing an electrostatic image, including: toner base particles each including a binder resin and a releasing agent; and inorganic fine particles, wherein the toner includes the inorganic fine particles as an external additive on a surface of the toner base particle, wherein the toner base particles have a BET specific surface area of 2.5 m2/g to 5.0 m2/g, and wherein the inorganic fine particles comprise inorganic fine particles (A) which are each a secondary particle where a plurality of primary particles are coalesced together.Type: ApplicationFiled: March 11, 2013Publication date: September 19, 2013Inventors: Satoshi KOJIMA, Tsuneyasu Nagatomo, Syouko Satoh, Osamu Uchinokura, Junichi Awamura, Satoshi Ogawa, Takahiro Honda, Daisuke Ito, Teruki Kusahara, Masaki Watanabe, Daisuke Inoue, Kiwako Hirohara
-
Publication number: 20130243488Abstract: A toner including: toner base particles; and external additive, the toner base particles each comprising binder resin and colorant, wherein the external additive comprises coalesced particles, the coalesced particles are each a non-spherical secondary particle in which primary particles are coalesced together, and an index of a particle size distribution of the coalesced particles is expressed by Formula (1): Db 50 Db 10 ? 1.Type: ApplicationFiled: March 8, 2013Publication date: September 19, 2013Inventors: Satoshi KOJIMA, Tsuneyasu NAGATOMO, Syouko SATOH, Osamu UCHINOKURA, Junichi AWAMURA, Satoshi OGAWA, Takahiro HONDA, Daisuke ITO, Teruki KUSAHARA, Masaki WATANABE, Daisuke INOUE
-
Publication number: 20130224648Abstract: Electrostatic image developing toner particles including: a crystalline polyester resin; a non-crystalline polyester resin; a releasing agent; and a colorant, wherein the electrostatic image developing toner particles have a glass transition temperature of 40° C. to 60° C. where the glass transition temperature is measured with a differential scanning calorimeter (DSC), and wherein the electrostatic image developing toner particles have an adhesive force between the toner particles of 1.4 mN to 2.2 mN where the adhesive force between the toner particles is measured after the electrostatic image developing toner particles have been stored at 50° C.Type: ApplicationFiled: November 9, 2011Publication date: August 29, 2013Inventors: Takahiro Honda, Osamu Uchinokura, Junichi Awamura, Satoshi Ogawa, Satoshi Kojima, Teruki Kusahara, Daisuke Inoue, Daisuke Ito, Tsuneyasu Nagatomo, Masaki Watanabe
-
Patent number: 8518973Abstract: A compound having the following formula [I] or a pharmaceutically acceptable salt thereof: wherein A is an aromatic five-membered heterocycle which optionally is fused with a cycloalkane ring; B is an alkylene; R1 and R2 are hydrogen, hydroxyl, alkoxy, aryloxy, alkyl, cycloalkyl, aryl, heterocycle, amino, alkylamino, arylamino or acyl, or R1 and R2 join together to form a heterocycle; X and Y are hydrogen, halogen, hydroxyl, alkoxy, aryloxy, alkyl, cycloalkyl, aryl, mercapto, alkylthio, arylthio, carboxyl, an ester of carboxyl, an amide of carboxyl, cyano or nitro; p is 0, 1 or 2; and q is 0 or 1. The compound is useful for treating diseases in which angiogenesis or augmentation of vascular permeability is involved.Type: GrantFiled: April 18, 2012Date of Patent: August 27, 2013Assignee: Santen Pharmaceutical Co., Ltd.Inventors: Takahiro Honda, Hisashi Tajima, Yoshimasa Sasabuchi, Kenji Kawashima, Kazuyoshi Okamoto, Minoru Yamamoto, Masakazu Ban
-
Patent number: 8507485Abstract: A method of treating a disease associated with angiogenesis by administering a therapeutically effective amount of a compound represented by the formula (1) or a salt thereof wherein the ring X represents R1 and R2 independently represent a hydrogen atom, an alkyl, an aryl or an aromatic heterocyclic; R3 represents a hydrogen atom, a halogen atom, a hydroxy, an alkoxy, an aryloxy, an alkyl, an aryl, an amino, an alkylamino, a cycloalkylamino, an arylamino, an alkylcarbonylamino, an arylcarbonylamino, a mercapto, an alkylthio, an arylthio, an alkylsulfinyl or a nonaromatic heterocyclic; A1 represents a sulfur atom, a sulfinyl or a sulfonyl; and A2 represents an alkylene.Type: GrantFiled: January 24, 2011Date of Patent: August 13, 2013Assignee: Santen Pharmaceutical Co., Ltd.Inventors: Hisashi Tajima, Takahiro Honda, Kenji Kawashima, Kazuyoshi Okamoto, Minoru Yamamoto