Patents by Inventor Masashi Nagayama

Masashi Nagayama 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).

  • Publication number: 20140063825
    Abstract: A rear structure of a saddle-ride type vehicle for preventing rainwater or the like splashed by a rear wheel from entering a fresh air inlet of an engine intake system. The rear structure of a saddle-ride type vehicle includes a rear fender halved into a first fender and a second fender connected to each other. The first fender is formed with a hanging portion so as to cover the rear and upside of a rear wheel and the second fender covering the upside of the rear wheel with a fresh air inlet being provided lateral to and in front of the rear wheel. The first fender and the second fender are disposed to overlap each other in an anteroposterior direction. The second fender is disposed on the vehicle-widthwise inside of the first fender. The second fender has anteroposteriorly and downwardly extending sidewalls at both vehicle-widthwise lateral end portions.
    Type: Application
    Filed: August 12, 2013
    Publication date: March 6, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Masanori NAKAMURA, Takasumi YAMANAKA, Michio ATSUCHI, Masashi NAGAYAMA, Kyosuke INADA, Noriyoshi SASAKI, Yoshihiro ARAI
  • Publication number: 20130260302
    Abstract: A toner, including: crystalline resin; non-crystalline resin; and a composite resin, wherein the crystalline resin is crystalline polyester resin (A), the non-crystalline resin comprises: non-crystalline resin (B) containing chloroform insoluble matter; and non-crystalline resin (C) having a softening temperature (T½) lower than that of the non-crystalline resin (B) by 25° C. or more, an absolute value |Tgc?Tgb| of a difference between a glass transition temperature (Tgc) of non-crystalline resin (C) and a glass transition temperature (Tgb) of non-crystalline resin (B) is 10° C. or lower, wherein the composite resin is composite resin (D) containing a condensation polymerization resin unit and an addition polymerization resin unit, and the toner has a molecular weight distribution having a main peak in 1,000 to 10,000 and a half width of 15,000 or less, where the molecular weight distribution is obtained by gel permeation chromatography (GPC) of tetrahydrofuran (THF) soluble matter of the toner.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 3, 2013
    Inventors: Hisashi Nakajima, Saori Yamada, Masashi Nagayama, Mariko Takii, Shinya Hanatani
  • Publication number: 20130260299
    Abstract: An image forming method including steps of forming a latent electrostatic image on an image bearing member, developing the latent electrostatic image with a development agent containing toner to obtain a toner image; transferring the toner image onto a transfer medium; fixing the toner image thereon; wherein the fixing is executed by a fixing device containing a heating roller; a fixing roller; a toner heating medium and the fixing roller; and a pressure roller wherein the toner contains a toner binder containing a crystalline resin containing a polyester resin A; a non-crystalline resin containing a non-crystalline resin B and a non-crystalline resin C, and a complex resin, wherein the toner has a main peak in a range of from 1,000 to 10,000 in the molecule weight distribution as measured for a component soluble in tetrahydrofuran by gel permeation chromatography with a half value width of 15,000 or less.
    Type: Application
    Filed: March 13, 2013
    Publication date: October 3, 2013
    Inventors: Hisashi NAKAJIMA, Masashi Nagayama, Saori Yamada, Mariko Takii
  • Publication number: 20130260307
    Abstract: A toner including a crystalline polyester resin (A), an amorphous resin (B), and a composite resin (C) having a condensation polymerization resin unit and an addition polymerization resin unit is provided. A molecular weight distribution of the toner based on THF-soluble contents thereof has a main peak within a molecular weight range from 1,000 to 10,000 and a half bandwidth of the main peak is 15,000 or less. The molecular weight distribution is determined by gel permeation chromatography. The toner includes chloroform-insoluble contents. A ratio C/R of the toner is within a range from 0.03 to 0.55. C and R represent heights of spectrum peaks specific to the crystalline polyester resin (A) and the amorphous resin (B), respectively, determined by a Fourier transform infrared spectroscopic attenuation total reflection method after the toner is stored in a thermostatic chamber at 45° C. for 12 hours.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 3, 2013
    Inventors: Masashi Nagayama, Hisashi Nakajima, Saori Yamada, Shinya Hanatani, Mariko Takii, Yoshitaka Sekiguchi
  • Publication number: 20130247881
    Abstract: A canister arrangement structure for a saddle-ride type vehicle in which a canister for adsorbing evaporated fuel in a fuel tank is disposed below a step floor on which an occupant's foot is placed, the step floors are configured as a left and right pair and are supported from below by left and right step frames that extend back and forth at a position on the side of the main frame of the vehicle. The canister is supported by the one step frame.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 26, 2013
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Katsuyuki Okubo, Masanori Nakamura, Masashi Nagayama, Tetsunori Iwamoto, Takasumi Yamanaka, Matake Sugeno
  • Publication number: 20130249186
    Abstract: A frame structure for a saddle-ride type vehicle includes a body frame having a head pipe, down tubes, seat rails and upper tubes and a unit swing power unit swingably supported by the body frame. The seat rails have front ends joined to downwardly extending portions of the down tubes. The down tube has a second bending portion formed at the rear end of the horizontal extending portion and an obliquely upwardly extending portion extending rearwardly and upwardly at a position behind the second bending portion. The obliquely upwardly extending portion has a rear end joined to the seat rail. The power unit support portion is formed behind the bending portion.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 26, 2013
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Tomoyuki MARUYAMA, Hiroyuki SHINMURA, Masashi NAGAYAMA
  • Publication number: 20130252160
    Abstract: A toner for forming an electrophotographic image is provided, wherein the toner includes at least four types of binder resins, wherein the binder resins includes at least: a crystalline polyester resin (A); a non-crystalline resin (B); a non-crystalline resin (C); and a composite resin (D) which includes a condensation polymerization resin unit and an addition polymerization resin unit, wherein the non-crystalline resin (B) includes a chloroform insoluble matter, wherein the non-crystalline resin (C) has a softening temperature (T½) lower than that of the non-crystalline resin (B) by 25° C. or more, and wherein the toner has a main peak between 1,000 to 10,000 in a molecular weight distribution obtained by GPC from a tetrahydrofuran soluble matter, and the toner has a half-value width of the molecular weight distribution of 15,000 or less.
    Type: Application
    Filed: September 14, 2012
    Publication date: September 26, 2013
    Inventors: Masashi NAGAYAMA, Mitsuo Aoki, Hisashi Nakajima, Saori Yamada, Mariko Takii
  • Publication number: 20130244162
    Abstract: A toner, including: a binder resin; and a colorant, wherein the binder resin contains: a crystalline polyester resin (A); a non-crystalline resin (B); and a composite resin (C), where the composite resin (C) contains a condensation polymerization resin unit and an addition polymerization resin unit, wherein the toner contains chloroform insoluble matter in an amount of 1% by mass to 30% by mass, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000 and a half width of 15,000 or less, where the molecular weight distribution is obtained through gel permeation chromatography (GPC) of tetrahydrofuran soluble matter of the toner, and wherein the toner has an endothermic peak in a range of 90° C. to 130° C. in measurement through differential scanning calorimetry (DSC).
    Type: Application
    Filed: March 14, 2013
    Publication date: September 19, 2013
    Inventors: Saori Yamada, Hisashi Nakajima, Masashi Nagayama, Shinya Hanatani, Mariko Takii, Yoshitaka Sekiguchi
  • Patent number: 8524436
    Abstract: In the image forming method, a color toner image and a transparent toner image are formed using a first developing device containing a first developer including color toner and carrier, and a second developing device containing a second developer including transparent toner and carrier. At least the second developing device includes a developer bearing member bearing the second developer for developing an electrostatic image; a developer supplying passage supplying the developer to the developer bearing member while feeding the developer in a first direction; and a developer feeding passage separated from the developer supplying passage at a central portion thereof and feeding the developer used for development in a direction parallel to the first direction. The transparent toner includes a resin and a lubricant and has viscoelastic property such that loss tangent has a peak with height of not less than 3 at a temperature of from 80° C. to 160° C.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: September 3, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Masashi Nagayama, Mitsuo Aoki, Hideyuki Santo, Shigenori Yaguchi
  • Publication number: 20120251168
    Abstract: An electrophotographic image forming method, including fixing one or more chromatic toner images on a recording medium; and fixing a transparent toner image on the chromatic toner image to partially or wholly increase glossiness of the recording medium, wherein the chromatic toner image has an average length (Sm) of concavities and convexities of from 50 to 350 ?m.
    Type: Application
    Filed: March 9, 2012
    Publication date: October 4, 2012
    Inventors: Masashi Nagayama, Mitsuo Aoki, Hisashi Nakajima, Saori Yamada
  • Publication number: 20120251169
    Abstract: An image forming method including forming an electrostatic latent image on an image bearing member; developing the electrostatic latent image using a color toner and a transparent toner to form a color toner image and a transparent toner image thereon; transferring the color toner image and the transparent toner image to a recording material; and fixing the color toner image and the transparent toner image on the recording material. The color toner includes a polyester resin and a colorant, and the loss tangent of the color toner has a maximum peak at a temperature of from 80° C. to 160° C., and is not greater than 3 at the maximum peak. The transparent toner includes a crystalline polyester resin, and the loss tangent of the transparent toner has a maximum peak at a temperature of from 80° C. to 160° C., and is not less than 3 at the maximum peak.
    Type: Application
    Filed: March 14, 2012
    Publication date: October 4, 2012
    Inventors: Mitsuo Aoki, Hisashi Nakajima, Masashi Nagayama, Saori Yamada
  • Publication number: 20120237868
    Abstract: A toner including a binder resin, a colorant, and a release agent is provided. The toner has a peak loss tangent (tan ?) value of 3 or more within a temperature range of 80 to 160° C. Here, the loss tangent (tan ?) is a ratio (G?/G?) of a loss elastic modulus (G?) to a storage elastic modulus (G?). The toner provides a good combination of low-temperature fixability, hot offset resistance, storage stability, coloring power and/or opacifying power, and gloss.
    Type: Application
    Filed: February 24, 2012
    Publication date: September 20, 2012
    Inventors: Saori Yamada, Mitsuo Aoki, Hisashi Nakajima, Masashi Nagayama, Shigenori Yaguchi
  • Patent number: 8247149
    Abstract: To provide an electrophotographic developer carrier including a carrier core material, and a coat layer containing a binder resin and conductivity-imparted microparticles which are produced by imparting conductivity to inorganic microparticles, the coat layer being formed over the carrier core material, wherein the electrophotographic developer carrier has a static resistivity of 10 [Log (?·cm)] or higher and a dynamic resistivity of 9 [Log (?)] or lower, and is used in an electrophotographic developer together with a negatively chargeable toner having an average circularity of 0.925 to 0.970, and wherein the toner includes a resin, a colorant and an inorganic layered mineral in which at least part of interlayer ions is modified with organic ions, and is granulated by dispersing and/or emulsifying an oil phase and/or a monomer phase containing at least a toner composition and/or a toner composition precursor in an aqueous medium.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: August 21, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinichiro Yagi, Kousuke Suzuki, Masashi Nagayama
  • Patent number: 8213833
    Abstract: An image forming apparatus including at least an image bearer; a charger charging the image bearer; an irradiator irradiating the image bearer to form an electrostatic latent image thereon; an image developer developing the electrostatic latent image with a developer comprising a toner and a carrier to form a toner image on the image bearer; a developer feeder feeding a supplemental developer including the toner and the carrier into the image developer; and a developer collector collecting the developer in the image developer, wherein the developer feeder includes a cylindrical supplemental developer container containing the supplemental developer, including a spiral developer guide race on the inner circumferential surface thereof; and a sub-hopper configured to store the supplemental developer, and wherein the carrier includes a core material; and a layer coated on the core material, including a binder resin and non-black or a non-color inorganic particulate material.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: July 3, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinichiro Yagi, Tomio Kondou, Masashi Nagayama, Hltoahi Iwatsuki
  • Publication number: 20120009518
    Abstract: In the image forming method, a color toner image and a transparent toner image are formed using a first developing device containing a first developer including color toner and carrier, and a second developing device containing a second developer including transparent toner and carrier. At least the second developing device includes a developer bearing member bearing the second developer for developing an electrostatic image; a developer supplying passage supplying the developer to the developer bearing member while feeding the developer in a first direction; and a developer feeding passage separated from the developer supplying passage at a central portion thereof and feeding the developer used for development in a direction parallel to the first direction. The transparent toner includes a resin and a lubricant and has viscoelastic property such that loss tangent has a peak with height of not less than 3 at a temperature of from 80° C. to 160° C.
    Type: Application
    Filed: June 24, 2011
    Publication date: January 12, 2012
    Inventors: Masashi NAGAYAMA, Mitsuo Aoki, Hideyuki Santo, Shigenori Yaguchi
  • Publication number: 20120009514
    Abstract: In the image forming method, at least one color toner image and a transparent toner image are formed using a color developer including a color toner and a carrier and contained in a first developing device, and a second developer including a transparent toner and a carrier and contained in a second developing device. A supplementary developer is supplied at least to the second developing device while discharging excess of the developer in the developing device. The transparent toner includes a lubricant and has a viscoelastic property such that a loss tangent (tan ?), which is defined as a ratio (G?/G?) of loss modulus (G?) to storage modulus (G?), has a peak at a temperature of from 80° C. to 160° C. and the peak has a height of not less than 3.
    Type: Application
    Filed: June 6, 2011
    Publication date: January 12, 2012
    Inventors: Masashi Nagayama, Mitsuo Aoki, Hideyuki Santo, Shigenori Yaguchi
  • Patent number: 8086143
    Abstract: An image forming apparatus including an image bearing member; and a developing device including a developer bearing member, a developer containing portion, a developer supplying passage supplying the developer to the developer bearing member while feeding the developer in a direction, and a developer agitating passage feeding a mixture of the developer fed through the developer supplying passage without used for developing, and the developer used for developing, in the opposite direction. The developer supplying passage, and developer agitating passage are separated from each other except for at least both the end portions. The developer includes a toner and a carrier having a cover layer thereon, which includes a binder resin and a particulate material. The ratio of the volume average particle diameter of the particulate material to the average thickness of the resinous portion of the cover layer is greater than 1 and less than 10.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: December 27, 2011
    Assignee: Ricoh Company, Limited
    Inventors: Masashi Nagayama, Tomio Kondou, Shinichiro Yagi, Hitoshi Iwatsuki
  • Publication number: 20110305485
    Abstract: A powder container includes a cylindrical container body to contain a powder, having an opening in one end thereof, to convey the powder contained in the container body to the opening with rotation of the container body, and having a container-body projection provided on an outer circumferential surface of the container body; and a cylindrical holder, into which the end of the container body having the opening is inserted, to hold the container body rotatably, having a powder outlet through which the powder is discharged from the holder and a holder projection provided on an inner circumferential surface thereof. The container-body projection repetitively contacts and separates from the holder projection with rotation of the container body to vibrate the container body and the holder.
    Type: Application
    Filed: June 10, 2011
    Publication date: December 15, 2011
    Inventors: Yuki OSHIKAWA, Yuuki SATOH, Takuya SESHITA, Toshiki HAYASHI, Masashi NAGAYAMA, Hiroyuki UENISHI, Tomoji ISHIKAWA
  • Patent number: 8067141
    Abstract: A carrier is provided including a core and a resin layer located overlying the core, wherein the carrier has a weight average particle diameter (Dw) of from 22 to 50 ?m, a ratio (Dw/Dp) of the weight average particle diameter (Dw) to a number average particle diameter (Dp) of from 1 to 1.30, a shape factor SF-1 of from 100 to 120, and a shape factor SF-2 of from 100 to 120, and wherein the carrier comprises core particles satisfying the following relationship 0.52<(d/D)<1.0 in an amount of from 0 to 10,000 ppm by number: wherein D (?m) represents a diameter of a circle having the same area as that of a projected image of a core particle and d (?m) represents a diameter of a circle having the same area as that of a projected image of a maximum hollow present in the core particle.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: November 29, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Kimitoshi Yamaguchi, Naoki Imahashi, Masashi Nagayama
  • Patent number: 8039189
    Abstract: The present invention can provide small-diameter core material particles for electro photographic carrier, the particles that can prevent occurrences of carrier adhesions and reduce toner spent, have excellent durability and cause little fluctuations in image density with a narrow particle diameter distribution, and an efficient, cost-effective production method thereof. That is, the core material particles for electro photographic carrier are particles wherein the weight average particle diameter, Dw, is in the range of 22 ?m to 32 ?m, the ratio of Dw to the number average particle diameter, Dp, satisfies the condition, 1<Dw/Dp<1.20, the content of particles smaller than 20 ?m in diameter is in the range of 0% by mass to 7% by mass and smaller than 36 ?m is in the range of 90% by mass to 100% by mass, and the BET specific surface area is in the range of 300 cm2/g to 900 cm2/g.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: October 18, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Kimitoshi Yamaguchi, Naoki Imahashi, Masashi Nagayama