Patents by Inventor Masahiro Iwasaki

Masahiro Iwasaki 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: 7397931
    Abstract: A human identification apparatus, which can judge for identification of human images even in temporally-distant frames or frames shot with different cameras, judges whether or not persons represented by human images respectively included in different image sequences are the same person, and includes: a walking posture detecting unit which detects first and second walking sequences, each sequence being an image sequence indicating a walking state of respective first and second persons respectively included in the different image sequences; and a walking state estimating unit which estimates a transition state of a walking posture in the periodic walking movement of the first person at a time or in a position different from a time or a position of the walking sequence of the first person; and a judging unit which verifies whether or not the estimated transition state of the walking posture of the first person matches the transition state of the walking posture of the second person, and judges that the first per
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: July 8, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Taro Imagawa, Masahiro Iwasaki
  • Publication number: 20070231721
    Abstract: The invention provides an electrophotographic photoreceptor comprising a conductive substrate having a photosensitive layer and a protective layer thereon, the protective layer comprising a crosslinked film having a phenolic structure, in which the relationship between a pH of the exfoliated protective layer extracted with distilled water (pHOCL) and a pH of said distilled water (pHw) satisfies the following formula (A):pHOCL?pHW?0.5.
    Type: Application
    Filed: March 27, 2007
    Publication date: October 4, 2007
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Katsumi Nukada, Masahiro Iwasaki, Wataru Yamada
  • Publication number: 20070148571
    Abstract: An arylamine compound represented by formula (I). Ar1 represents a phenyl group substituted by a substituted or unsubstituted monovalent polycyclic aromatic hydrocarbon group, and a substituted or unsubstituted monovalent heterocyclic group. Ar2 represents a substituted or unsubstituted arylene group. R1 represents a hydrogen atom, a halogen atom, an alkoxy group, or a substituted or unsubstituted alkyl group. R2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group. R3 and R4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, at least one of R3 and R4 represents a substituted or unsubstituted aryl group, and R3 and R4 may be bound to form a ring via a single bond or a divalent group m represents an integral of from 0 to 4.
    Type: Application
    Filed: January 23, 2007
    Publication date: June 28, 2007
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Masahiro Iwasaki, Katsumi Nukada, Mieko Seki
  • Publication number: 20070148570
    Abstract: An electrophotographic photoreceptor comprising: a conductive support; and a photosensitive layer, wherein the photosensitive layer comprises a first functional layer comprising a cured product of a composition that contains a compound represented by formula (I): FL-O—R)n??(I) wherein in formula (I), F represents a hole-transporting n-valent organic group; R represents a monovalent organic group; L represents an alkylene group; and n indicates an integer of from 1 to 4.
    Type: Application
    Filed: March 28, 2006
    Publication date: June 28, 2007
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Masahiro Iwasaki, Katumi Nukada, Wataru Yamada, Kazuya Hongo
  • Publication number: 20070110607
    Abstract: The present invention provides a WC—Co system (the WC—Co system in the present invention means that it comprises not only hard grains composed mainly of WC and iron group metal powder containing Co, but also at least one kind selected from carbide, nitride, carbonitride and boride of elements in Groups IVa, Va and VIa of the Periodic Table, excluding WC, as hard grains) cemented carbide having high strength and high toughness which is excellent in wear resistance, toughness, chipping resistance and thermal crack resistance.
    Type: Application
    Filed: September 11, 2006
    Publication date: May 17, 2007
    Applicant: SANALLOY INDUSTRY CO., LTD.
    Inventors: Masahiro Iwasaki, Hidefumi Yanagita, Masaaki Ikebe
  • Patent number: 7205080
    Abstract: An arylamine compound represented by formula (1). Ar1 represents a phenyl group substitued by a substituted or unsubstituted monovalent polycyclic aromatic hydrocarbon group, and a substituted or unsubstituted monovalent heterocyclic group. Ar2 represents a substituted or unsubstituted arylene group. R1 represents a hydrogen atom, a halogen atom, an alkoxy group, or a substituted or unsubstituted alkyl group. R2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group. R3 and R4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, at least one of R3 and R4 represents a substituted or unsubstituted aryl group, and R3 and R4 may be bound to form a ring via a single bond or a divalent group. m represents an integral of from 0 to 4.
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: April 17, 2007
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masahiro Iwasaki, Katsumi Nukada, Mieko Seki
  • Publication number: 20070054059
    Abstract: To provide a spraying material having an excellent quick-setting property and excellent adherability, a small alkali amount and excellent initial strength development, and a spraying method using it. The spraying material comprises a liquid quick-setting admixture containing an aluminum source, a sulfur source and a fluorine source, one or more quick-setting aids selected from the group consisting of calcium aluminate, calcium sulfoaluminate, calcium aluminosilicate, an alkali metal-containing substance, calcium hydroxide and aluminum hydroxide, and a cement concrete, and the method is to spray this spraying material.
    Type: Application
    Filed: August 19, 2004
    Publication date: March 8, 2007
    Inventors: Yasuhiro Nakashima, Shunichi Mishima, Masahiro Iwasaki, Isao Terashima, Atsumu Ishida, Takamitsu Murokawa, Tomohito Kobayashi
  • Patent number: 7175955
    Abstract: An electrophotographic photoreceptor comprising a conductive substrate, and at least one layer, which contains a polymeric compound having a repeating unit selected from repeating units represented by the following general formulas (I) to (III), provided on the conductive substrate, as well as an electrophotographic process cartridge and an image forming apparatus using the electrophotographic photoreceptor. In general formulas (I) to (III), R1a and R1b each independently represent an alkylene group, X represents an arylene group or an alkylene group, Y represents a divalent aromatic group, and n represents a repeating unit number.
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: February 13, 2007
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kenji Yao, Masahiro Iwasaki, Katsumi Nukada
  • Publication number: 20070003850
    Abstract: A curable resin composition for use as a constituting material of an electrophotographic photoreceptor, comprises: a phenolic resin; a charge transportable material having a reactive functional group; and at least one of an organic sulfonic acid and its derivative.
    Type: Application
    Filed: June 1, 2006
    Publication date: January 4, 2007
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada, Masahiro Iwasaki, Kenji Yao
  • Publication number: 20060292464
    Abstract: An electrophotographic photoreceptor comprising: a conductive support; and a photo-sensitive layer on the conductive support, wherein the photo-sensitive layer comprises a functional layer comprising a cured product of a curable resin composition, the curable resin composition comprising an alcohol-soluble, curable resin and a polyether-modified silicone oil.
    Type: Application
    Filed: September 28, 2005
    Publication date: December 28, 2006
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Wataru Yamada, Katsumi Nukada, Masahiro Iwasaki, Kenji Yao, Kazuhiro Koseki
  • Publication number: 20060292465
    Abstract: A curable resin composition for use as a constituent material of an electrophotographic photoreceptor, the curable resin composition comprising: a phenolic resin having an (MwH/MwL) value of approximately 1.90 or less in a molecular weight distribution measured by gel permeation chromatography, wherein MwH is a peak area for a weight average molecular weight of approximately 200 or more; and MwL is a peak area for a weight average molecular weight of less than approximately 200.
    Type: Application
    Filed: December 14, 2005
    Publication date: December 28, 2006
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Wataru Yamada, Katsumi Nukada, Masahiro Iwasaki, Kazuhiro Koseki
  • Publication number: 20060262857
    Abstract: The present invention provides a moving object detection device that includes: a spatiotemporal data generation unit 120 which generates time series data which arranges data indicating a moving object along a temporal axis, based on an output from a camera 100; an inter-leg information unit 140 which extracts, based on the generated time series data, inter-leg information, which is information regarding a temporal change in an inter-leg area arising from movement of a moving object that has two or more legs; a periodicity analysis unit 150 which analyzes a periodicity within the extracted inter-leg information; and a moving object detection unit 160 which generates, from the analyzed periodicity, movement information that includes the presence or lack thereof of a moving object.
    Type: Application
    Filed: March 1, 2006
    Publication date: November 23, 2006
    Inventors: Masahiro Iwasaki, Toshiki Kindo, Taro Imagawa
  • Publication number: 20060216619
    Abstract: An electrophotographic photoreceptor comprising: a conductive support; and a photosensitive layer, wherein the photosensitive layer comprises a functional layer that comprises at least one of a first compound represented by formula (I); and a second compound derived from the first compound: wherein F represents a hole-transporting, n-valent organic group; R independently represents an organic group having from 1 to 18 carbon atoms; T represents a divalent group; m indicates 0 or 1; and n indicates an integer of from 1 to 4.
    Type: Application
    Filed: March 27, 2006
    Publication date: September 28, 2006
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Masahiro Iwasaki, Katsumi Nukada, Wataru Yamada, Kenji Yao
  • Patent number: 7105257
    Abstract: An electrophotographic photoreceptor comprising a conductive support and a photosensitive layer disposed on the conductive support, wherein the photosensitive layer comprises a silicon compound-containing layer containing a silicon compound, and the silicon compound-containing layer further contains a resin, and wherein the photosensitive layer has a peak area in the region of ?40 to 0 ppm (S1) and a peak area in the region of ?100 to ?50 ppm (S2) in a 29Si-NMR spectrum satisfying the following equation (1): S1/(S1+S2)?0.5.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: September 12, 2006
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada, Kazuhiro Koseki, Takayuki Yamashita, Masahiro Iwasaki, Takahiro Suzuki
  • Publication number: 20060195199
    Abstract: A monitoring device includes: a moving object image generation unit which receives, on a frame-by-frame basis, an overall image captured by a camera and performs inter-frame differential processing on the overall image or background differential processing between the overall image and a background image that is previously prepared; a density calculation unit which transforms the differential processed image (a moving object image) into one-dimensional information and calculates a density indicating a degree of density of moving objects or of a crowd through frequency analysis; a model generation unit which calculates a reference density (a model value) of the moving objects or of the crowd based on the density of a predetermined date and time; and a situation determination unit which compares between the density at the current time and the reference density, determines whether or not the density at the current time is different from the reference density, generates a determination result, and provides the re
    Type: Application
    Filed: April 17, 2006
    Publication date: August 31, 2006
    Inventors: Masahiro Iwasaki, Taro Imagawa
  • Patent number: 7094511
    Abstract: The present invention relates to an electrophotographic photoreceptor comprising a conductive support having formed thereon a specific photosensitive layer. The photosensitive layer comprises a siloxane resin-containing layer containing a siloxane resin having a structural unit represented by general formula (1) shown below, a structural unit represented by general formula (2) shown below, and an organic group derived from a compound having hole transport capability, or comprises a siloxane resin-containing layer containing a siloxane resin obtained by using an organic silicon compound having a structural unit represented by general formula (1) shown below and a hydrolytic group, and a compound represented by general formula (3) shown below: The formulas are defined in the specification.
    Type: Grant
    Filed: September 25, 2003
    Date of Patent: August 22, 2006
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Wataru Yamada, Katsumi Nukada, Kazuhiro Koseki, Masahiro Iwasaki, Takayuki Yamashita
  • Patent number: 7074540
    Abstract: An image forming apparatus is capable of performing image formation at a processing speed of not lower than 150 mm/s. An electrophotographic photoreceptor comprises a surface layer containing a siloxane-bases resin having charge-transporting properties and a crosslinked structure. A cleaning device comprises a brush member disposed such that the leading end of said brush comes in contact with said electrophotographic photoreceptor. The product (Rz×We) of the surface roughness (Rz [?m]) of said electrophotographic photoreceptor after 200,000 rotations thereof and the wear rate of said electrophotographic photoreceptor per 1,000 rotations (We [nm]) is not greater than 20.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: July 11, 2006
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsumi Nukada, Kazuhiro Koseki, Wataru Yamada, Takayuki Yamashita, Masahiro Iwasaki, Takahiro Suzuki, Kiyoshi Chatani, Yoshinari Ueno, Hidekazu Yaguchi, Kazuhiko Yanagida
  • Publication number: 20060120564
    Abstract: A human identification apparatus, which can judge for identification of human images even in temporally-distant frames or frames shot with different cameras, judges whether or not persons represented by human images respectively included in different image sequences are the same person, and includes: a walking posture detecting unit which detects first and second walking sequences, each sequence being an image sequence indicating a walking state of respective first and second persons respectively included in the different image sequences; and a walking state estimating unit which estimates a transition state of a walking posture in the periodic walking movement of the first person at a time or in a position different from a time or a position of the walking sequence of the first person; and a judging unit which verifies whether or not the estimated transition state of the walking posture of the first person matches the transition state of the walking posture of the second person, and judges that the first per
    Type: Application
    Filed: January 31, 2006
    Publication date: June 8, 2006
    Inventors: Taro Imagawa, Masahiro Iwasaki
  • Publication number: 20060115116
    Abstract: The present invention provides a human detection device which detects a human contained in a moving picture, and includes the following: a spatiotemporal volume generation unit which generates a three-dimensional spatiotemporal image in which frame images that make up the moving picture in which a human has been filmed are arranged along a temporal axis; a spatiotemporal fragment extraction unit which extracts a real image spatiotemporal fragment, which is an image appearing in a cut plane or cut fragment when the three-dimensional spatiotemporal image is cut, from the generated three-dimensional spatiotemporal image; a human body region movement model spatiotemporal fragment output unit which generates and outputs, based on a human movement model which defines a characteristic of the movement of a human, a human body region movement spatiotemporal fragment, which is a spatiotemporal fragment obtained from a movement by the human movement model; a spatiotemporal fragment verification unit which verifies betwe
    Type: Application
    Filed: December 29, 2005
    Publication date: June 1, 2006
    Inventors: Masahiro Iwasaki, Taro Imagawa, Kenji Nagao, Etsuko Nagao
  • Publication number: 20060029870
    Abstract: An electrophotographic photoreceptor of the present invention comprises a conductive support and a photosensitive layer. The photosensitive layer on the farthest side from the conductive support, includes a phenol derivative-containing layer which contains a phenol derivative having a methylol group and a charge transport material having at least one selected from the group consisting of a hydroxyl group, a carboxyl group, an alkoxysilyl group, an epoxy group, a thiol group and an amino group. An infrared absorption spectrum of the phenol derivative-containing layer satisfies the conditions represented by the following formula (1): (P2/P1)?0.2??(1) P1 is an absorbance of a maximum absorption peak in a range of 1560 cm?1 to 1640 cm?1, and P2 is an absorbance of a maximum absorption peak in a range of 1645 cm?1 to 1700 cm?1.
    Type: Application
    Filed: February 25, 2005
    Publication date: February 9, 2006
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Katsumi Nukada, Masahiro Iwasaki, Kenji Yao, Ryo Sekiguchi, Wataru Yamada