Patents by Inventor Kazumi Suzuki

Kazumi Suzuki 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: 7711301
    Abstract: An image transfer device provided in an image forming apparatus in which, employing an endless belt as an intermediate transfer member, image transfer is performed at nip positions of a primary transfer portion and secondary transfer portion. Generation of warp in the transferred image resulting from transmission of fluctuations in load and torque of the endless belt generated at the nip position of one transfer portion nip to the nip position of the other transfer portion is prevented. The endless belt is turned between rollers and the endless belt is individually driven at the primary transfer portion and secondary transfer portion by drive sources to generate deflection between the primary transfer portion and the secondary transfer portion.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: May 4, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Takeshi Takemoto, Takashi Seto, Katsuaki Miyawaki, Takashi Fujita, Hiromitsu Takagaki, Atsushi Nakafuji, Shin Kayahara, Hirohmi Tamura, Kazumi Suzuki
  • Patent number: 7711300
    Abstract: An image forming apparatus includes an image carrier for bearing a visible image thereon, an endless transfer-fixing belt stretchedly disposed between a plurality of spanning members, a pressure member for pressing the transfer-fixing belt to the image carrier while contacting a backside of the transfer-fixing belt at the transfer nip, and a heater for heating the visible image. The visible image on the image carrier is transferred onto the front surface of the transfer-fixing belt at the transfer nip and is transported to the transfer-fixing nip while heated by the heater, where the visible image is transferred and fixed on a recording member. The transfer-fixing belt is stretchedly arranged such that the transfer-fixing belt travels in a direction substantially perpendicular to a pressure direction of the pressure member in the proximity of the transfer nip.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: May 4, 2010
    Assignee: Ricoh Company Ltd.
    Inventors: Atsushi Nakafuji, Takashi Fujita, Shin Kayahara, Hiromitsu Takagaki, Takashi Seto, Katsuaki Miyawaki, Kazumi Suzuki, Hirohmi Tamura
  • Publication number: 20100055590
    Abstract: A method for producing a toner including periodically forming and discharging liquid droplets of a toner composition liquid containing at least a resin, a releasing agent and a colorant from a plurality of nozzles formed in a thin film which is provided in a reservoir for the toner composition liquid, by vibrating the thin film using a mechanically vibrating unit, and forming toner particles by solidifying the liquid droplets, wherein the forming toner particles comprises primarily drying the liquid droplets under a stream of dry gas containing an organic solvent whose partial pressure is equal to or higher than 1/10 of a saturated vapor pressure thereof but is equal to or lower than the saturated vapor pressure, the saturated vapor pressure being that at a drying temperature; and secondarily drying the primarily dried liquid droplets for solidification while the organic solvent is being evaporated.
    Type: Application
    Filed: August 31, 2009
    Publication date: March 4, 2010
    Inventors: Takahiro HONDA, Yohichiroh Watanabe, Kazumi Suzuki
  • Publication number: 20100041725
    Abstract: A pharmaceutical composition comprising a compound represented by the general formula (I): or a salt thereof, and a pharmaceutically acceptable carrier, wherein the composition does not substantially contain a reducing sugar and/or a carrier containing a reducing sugar as an ingredient as the pharmaceutically acceptable carrier, or when the composition contains a reducing sugar and/or a carrier containing a reducing sugar as an ingredient as the pharmaceutically acceptable carrier, contact of the reducing sugar and the compound represented by the general formula (I) or a salt thereof is eliminated.
    Type: Application
    Filed: January 16, 2009
    Publication date: February 18, 2010
    Applicant: Asahi Kasei Pharma Corporation
    Inventor: Kazumi SUZUKI
  • Publication number: 20100021209
    Abstract: A toner produced by dissolving or dispersing toner components comprising a binder resin, a colorant, and a charge controlling agent in an organic solvent to prepare a toner components liquid, forming liquid droplets of the toner components liquid in a gas phase, and solidifying the liquid droplets into toner particles of the toner. The charge controlling agent includes a polycondensation reaction product of a phenol with an aldehyde.
    Type: Application
    Filed: July 15, 2009
    Publication date: January 28, 2010
    Inventors: Yohichiro WATANABE, Kazumi Suzuki, Takahiro Honda, Shinji Ohtani, Yoshihiro Norikane
  • Publication number: 20100021195
    Abstract: An apparatus and method for image fixing are disclosed. A fixing device includes a fixing member, a pressure member, a heater, and a pressure controller. The fixing member and the pressure member face with each other to form a nip. The heater heats a surface of the fixing member when the fixing member rotates. The pressure controller changes a pressure generated at the nip, according to an operation of the fixing device.
    Type: Application
    Filed: September 30, 2009
    Publication date: January 28, 2010
    Inventors: Jun YURA, Koichi Kato, Hiroshi Nakai, Kazumi Suzuki, Kei Yasutomi, Hideki Kosugi, Hirokatsu Suzuki, Ichiro Kadota
  • Patent number: 7643767
    Abstract: A transfer unit for use in an image forming apparatus includes a transfer belt, and a counter member. The transfer belt, having a given circumferential length, receives an un-fixed image, formed of an image developer, from an image carrier at a first nip, which is defined between the transfer belt and the image carrier. The counter member faces the transfer belt to form a second nip with the transfer belt. The un-fixed image is transferred from the transfer belt to a recording medium passing through the second nip. A slack portion is generated in the transfer belt, when a front edge of the recording medium passes through the second nip. The slack portion of the transfer belt being generated in a first portion of the transfer belt returning from the second nip to the first nip.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: January 5, 2010
    Assignee: Ricoh Co., Ltd.
    Inventors: Takashi Seto, Takeshi Takemoto, Takashi Fujita, Katsuaki Miyawaki, Hiromitsu Takagaki, Shin Kayahara, Atsushi Nakafuji, Hiromi Tamura, Kazumi Suzuki
  • Publication number: 20090325100
    Abstract: The present invention provides a toner containing at least two binder resins composed of at least a resin A and a resin B which are incompatible with each other, and a colorant, wherein the toner has an average circularity of 0.93 to 0.98 and is produced by atomizing a toner composition liquid in a vapor phase to form liquid droplets and solidifying the liquid droplets, and the toner composition liquid is prepared by dissolving or dispersing the at least two binder resins and the colorant in an organic solvent.
    Type: Application
    Filed: June 12, 2008
    Publication date: December 31, 2009
    Inventors: Yohichiroh Watanabe, Kazumi Suzuki, Shinji Ohtani, Takahiro Honda, Yoshihiro Norikane
  • Publication number: 20090317738
    Abstract: 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: Application
    Filed: June 22, 2009
    Publication date: December 24, 2009
    Inventors: Takahiro HONDA, Yukio Tabata, Yohichiroh Watanabe, Kazumi Suzuki, Shinji Ohtani, Yoshihiro Norikane
  • Patent number: 7620336
    Abstract: An apparatus including and a method using a fixing device including a fixing member, a pressure member, a heater, and a pressure controller. The fixing member and the pressure member face with each other to form a nip. The heater heats a surface of the fixing member when the fixing member rotates. The pressure controller is configured to change a pressure generated at the nip, according to an operation of the fixing device.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: November 17, 2009
    Assignee: Ricoh Co., Ltd.
    Inventors: Jun Yura, Koichi Kato, Hiroshi Nakai, Kazumi Suzuki, Kei Yasutomi, Hideki Kosugi, Hirokatsu Suzuki, Ichiro Kadota
  • Patent number: 7613419
    Abstract: An image forming apparatus equipped with an image bearing member, a latent electrostatic image forming unit which forms a latent electrostatic image on the image bearing member, a developing unit which develops the latent electrostatic image by using a toner to form a toner image, a transfer fixing member which is roll shaped or belt shaped and bears the toner image , a heating unit which heats the toner image on the transfer fixing member; and a pressurizing member which is roll shaped and forms a transfer fixing nip with the transfer fixing member. The toner image on the transfer fixing member is transferred and fixed simultaneously to a recording medium which passes through the transfer fixing nip to record an image on the recording medium.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: November 3, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazumi Suzuki, Takashi Fujita, Hideki Kosugi, Ichiro Kadota, Atsushi Nakafuji, Hiromitsu Takagaki
  • Publication number: 20090239170
    Abstract: A method for producing a toner, the method including discharging a toner composition liquid from a plurality of nozzles to form liquid droplets thereof, the toner composition liquid being prepared by dissolving or dispersing in a solvent a toner composition containing at least a binder resin, a colorant, an acid-modified hydrocarbon wax and an unmodified hydrocarbon wax, the waxes serving as a releasing agent, and solidifying the liquid droplets so as to form solid particles.
    Type: Application
    Filed: March 17, 2009
    Publication date: September 24, 2009
    Inventors: Takahiro Honda, Yohichiroh Watanabe, Kazumi Suzuki, Shinji Ohtani, Yoshihiro Norikane
  • Patent number: 7551882
    Abstract: An image forming apparatus includes an image bearing member, a latent electrostatic image forming unit, a developing unit, an intermediate transferring unit which has an intermediate transfer belt and a plurality of rollers supporting the intermediate transfer belt, and a transfer fixing unit. The transfer fixing unit has a transfer fixing belt, a plurality of rollers supporting the transfer fixing belt, a heating member, and a pressurizing member forming a transfer fixing nip with the transfer fixing belt. A first roller, which is one of the plurality of rollers supporting the intermediate transferring belt, is opposite to a second roller, which is one of the plurality of rollers supporting the fixing transfer belt. The first roller and the second roller form a transfer nip between the intermediate transferring belt and the fixing transfer belt. The diameter of the first roller is smaller than the diameter of the second roller.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: June 23, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Takashi Seto, Takashi Fujita, Katsuaki Miyawaki, Shin Kayahara, Atsushi Nakafuji, Kazumi Suzuki, Hirohmi Tamura, Hiromitsu Takagaki
  • Publication number: 20090116880
    Abstract: A transfer fixation apparatus includes: a fixing member that carries the toner image; a pressurizing member that becomes in contact with the fixing member with pressure to form a nip through which the recording target medium is transported; and a plurality of heating members that are provided at relatively upstream positions when viewed from the relatively downstream nip and apply heat to the surface of the recording target medium that is transported toward the nip, wherein the number of heating members that apply heat to the surface of the recording target medium is changed depending on whether the transfer of the toner image is performed only on the front side of the recording target medium or the transfer of the toner image is performed also on the reverse side of the recording target medium after the transfer of the toner image on the front side of the recording target medium.
    Type: Application
    Filed: October 27, 2008
    Publication date: May 7, 2009
    Inventors: Hiromitsu Takagaki, Takashi Fujita, Shin Kayahara, Takashi Seto, Atsushi Nagata, Takeshi Takemoto, Kazumi Suzuki
  • Publication number: 20090117486
    Abstract: A method of preparing a toner, including periodically discharging a toner constituent liquid from plural nozzles having the same aperture diameter with a mechanical oscillator, wherein the toner constituent liquid includes: a binder resin, a colorant, and an organic solvent, wherein the binder resin and the colorant are dissolved or dispersed in the organic solvent; forming a droplet of the toner constituent liquid in a gas phase; and solidifying the droplet, wherein the aperture diameter is from 3 to 30 ?m, and the binder resin has a ratio (Mw/Mn) of a weight-average molecular weight (Mw) to a number-average molecular weight (Mn) of THF (tetrahydrofuran)-soluble components therein of from 1.5 to 15 in a molecular weight distribution measured by GPC (gel permeation chromatography), and a ½ flow temperature (Tm) of from 114 to 149° C.
    Type: Application
    Filed: November 4, 2008
    Publication date: May 7, 2009
    Inventors: Yohichiroh Watanabe, Kazumi Suzuki, Takahiro Honda, Shinji Ohtani, Yoshihiro Norikane
  • Publication number: 20090049935
    Abstract: It is intended to provide a milnacipran formulation which is more stable than a conventionally known milnacipran formulation, and a method of stabilizing a milnacipran formulation. The object could be achieved by using a milnacipran-containing composition in which milnacipran or a salt thereof is allowed to exist in a porous carrier, packing a powder containing milnacipran or a salt thereof in an HPMC capsule, or combining an additive which does not cause an interaction with milnacipran with time.
    Type: Application
    Filed: June 8, 2006
    Publication date: February 26, 2009
    Applicant: Pierre Fabre Medicament
    Inventors: Kazumi Suzuki, Hitoshi Yamada
  • Publication number: 20090042118
    Abstract: A method of preparing a toner, including dripping a toner constituent liquid comprising an organic solvent; and toner constituents comprising a resin and a colorant, which are dissolved or dispersed in the organic solvent through a nozzle to form a droplet; and removing the organic solvent from the droplet, wherein the droplet is dried while contacted with a first de-solvent gas comprising steam in a pre-heated period and at least a part of a constant-rate drying period, or the droplet is dried at least in a pre-heated period and a constant-rate drying period, which include two stages including a first stage and a second stage, wherein the droplet is contacted with the first de-solvent gas including steam in the first stage and a second de-solvent gas having a dew point not greater than ?10° C. under ordinary pressure in the second stage.
    Type: Application
    Filed: August 7, 2008
    Publication date: February 12, 2009
    Inventors: Kazumi Suzuki, Yohichiroh Watanabe
  • Publication number: 20090016786
    Abstract: A transfer fixing member containing a base, and an outermost surface layer composed of an elastic material in which a conductive material is dispersed, wherein when a pressure applied to a surface of the transfer fixing member by making a toner image bearing member in contact with the transfer fixing member upon transferring of a toner image on the toner image bearing member onto the transfer fixing member is 0.2 kg/cm2 to 2.0 kg/cm2, the transfer fixing member has a volume resistance of 106?·cm or more to less than 1012?· cm, and when a pressure applied to the surface of the transfer fixing member by making the transfer fixing member in contact with the recording medium located between the transfer fixing member and a pressurizing member upon transfer-fixing of the toner image onto the recording medium is 3.0 kg/cm2 to 20 kg/cm2, the transfer fixing is member has a volume resistance of less than 106?·cm.
    Type: Application
    Filed: June 30, 2008
    Publication date: January 15, 2009
    Inventors: Kazumi Suzuki, Takashi Fujita, Hiromitsu Takagaki, Takashi Seto, Shin Kayahara, Atsushi Nagata
  • Publication number: 20090003898
    Abstract: A cleaning device including a cleaning member that moves in a predetermined direction and is in contact with a cleaning target that moves in a predetermined direction and which is directly or indirectly heated by a heater, to remove toner particles on a surface of the cleaning target. A contact surface of the cleaning member with the cleaning target includes a plurality of regions of different toner-releasing ability.
    Type: Application
    Filed: June 23, 2008
    Publication date: January 1, 2009
    Inventors: Shin Kayahara, Takashi Fujita, Takeshi Takemoto, Hiromitsu Takagaki, Takashi Seto, Kazumi Suzuki, Atsushi Nagata
  • Publication number: 20080292985
    Abstract: Provided are an electrophotographic toner and a method for producing the electrophotographic toner that satisfy high image quality, cleaning stability, and high productivity. The electrophotographic toner is produced by spray-drying a toner ingredient-containing liquid, wherein the toner ingredient-containing liquid dissolves or disperses at least a resin, a low molecular mass organic material, and a colorant in an organic solvent, the resin is soluble in the organic solvent, the low molecular mass organic material is a crystalline compound or a composition of crystalline compounds that is soluble in the organic solvent, the toner ingredient-containing liquid contains substantially no particles having a particle diameter of 500 nm or more, the crystalline compound or the composition of crystalline compounds crystallizes upon spray-drying to deform toner particles into a circularity of 0.93 or higher to 0.98 or less, and volume average particle diameter of the toner particles is 3.
    Type: Application
    Filed: February 25, 2008
    Publication date: November 27, 2008
    Inventors: Kazumi SUZUKI, Yohichiroh Watanabe, Takahiro Honda, Yoshihiro Norikane, Shinji Ohtani, Tsuyoshi Sugimoto