Patents by Inventor Katsumi Matsuura

Katsumi Matsuura 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: 5824444
    Abstract: An image forming apparatus comprising (a) a photoreceptor comprising an endless transparent support having thereon a transparent conductive layer, a charge carrier generation layer and a charge carrier transport layer; (b) a charger for charging uniformly the outermost surface of the photoreceptor; (c) an exposing means for having the photoreceptor exposed to light from the side of the support to form an electrostatic latent image on the surface of the photoreceptor; (d) a developing means for developing the electrostatic latent image to form a toner image; (e) a transfer means for transferring the toner image onto a transfer material; and (f) a fixing means for fixing the toner image transferred, wherein a transmittance of the charge carrier generation layer is 20% or less with respect to exposing light emitted from the exposing means, and a carrier drift mobility in the charge carrier transport layer is 1.times.10.sup.-6 cm.sup.2 /V.sec or more under an electric field intensity of 2.times.10.sup.5 V/cm.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: October 20, 1998
    Assignee: Konica Corporation
    Inventors: Akira Kinoshita, Katsumi Matsuura
  • Patent number: 5798200
    Abstract: A method for forming plural images by repeating a process is disclosed. The method comprises the steps of (1) forming an electrostatic latent image on an organic photoreceptor, (2) developing the electrostatic latent image formed on the organic photoreceptor with a toner particles each of which contains domains of releasing agent having a number average domain diameter of 0.1 .mu.m to 1.1 .mu.m to form a toner image, (3) transferring the toner image to a image receiving paper using a transferring roller being pressed to the photoreceptor with a pressure of 25 g/cm.sup.2 to 1000 g/cm.sup.2, (4) separating the image receiving paper carrying the transferred toner image from the photoreceptor, (5) fixing the toner image carried on the image receiving paper, and (6) cleaning the surface of the photoreceptor.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: August 25, 1998
    Assignee: Konica Corporation
    Inventors: Katsumi Matsuura, Shigeki Takenouchi
  • Patent number: 5721085
    Abstract: Disclosed is an image forming method for an electrophotographic photoreceptor, comprising steps of:(1) charging said photoreceptor which is moved in a predetermined direction,(2) imagewise exposing on said charged photoreceptor,(3) developing said imagewise exposed photoreceptor with a developer to form a toner image,(4) transferring said toner image onto an image receiving material, and(5) cleaning a residual toner on said photoreceptor with a cleaning blade after transferring said toner image, wherein said cleaning blade has a fixed end portion and a free end portion,said cleaning step comprising:urging said free end portion in a direction counter to said predetermined direction of the photoreceptor, wherein said photoreceptor has a static friction coefficient of not more than 1.0 to said cleaning blade so that said free end portion of said cleaning blade is oscillated in an amplitude of 10 .mu.m to 200 .mu.m with the movement of the photoreceptor.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: February 24, 1998
    Assignee: Konica Corporation
    Inventors: Takeo Oshiba, Akihiko Itami, Katsumi Matsuura
  • Patent number: 5660960
    Abstract: An image forming apparatus comprising (a) a photoreceptor comprising an endless transparent support having thereon a transparent conductive layer, a charge carrier generation layer and a charge carrier transport layer; (b) a charger for charging uniformly the outermost surface of the photoreceptor; (c) an exposing means for having the photoreceptor exposed to light from the side of the support to form an electrostatic latent image on the surface of the photoreceptor; (d) a developing means for developing the electrostatic latent image to form a toner image; (e) a transfer means for transferring the toner image onto a transfer material; and (f) a fixing means for fixing the toner image transferred, wherein a transmittance of the charge carrier generation layer is 20% or less with respect to exposing light emitted from the exposing means, and a carrier drift mobility in the charge carrier transport layer is 1.times.10.sup.-6 cm.sup.2 /V.sec or more under an electric field intensity of 2.times.10.sup.5 V/cm.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: August 26, 1997
    Assignee: Konica Corporation
    Inventors: Akira Kinoshita, Katsumi Matsuura
  • Patent number: 5604574
    Abstract: An electrophotographic image-forming method is disclosed. The image forming method comprises the steps of (1) forming an electrostatic latent image on a rotating electrophotographic photoreceptor having an organic photoconductive layer, (2) developing the electrostatic latent image with a toner comprising toner particles which contain a releasing agent existing in the toner particle in a form of insular domain having a number average diameter of 0.1 .mu.m to 1.1 .mu.m to form a toner image, (3) transferring the toner image to an image receiving member, and (4) cleaning the surface of the photoreceptor after the transferring step by a cleaning member having a rubber elastic cleaning blade having an impact resilience of 35 to 75% which is contacted to the surface of the photoreceptor in the direction counter to the rotating direction of the photoreceptor with a pressure of 5 to 40 g/cm, and the coefficient of static friction between the cleaning blade and the surface of the photoreceptor is not more than 1.0.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: February 18, 1997
    Assignee: Konica Corporation
    Inventors: Katsumi Matsuura, Yuji Marukawa, Yoshihiko Etoh
  • Patent number: 5415966
    Abstract: In an apparatus for forming a toner image, a photoreceptor includes a plurality of layers, wherein the uppermost layer is a charge-transferring layer containing a charge-transferring material represented by the following general formula (1) and the oxygen gas permeability coefficient per unit thickness of the charge-transferring layer is not higher than 1.0.times.10.sup.-7 (cc/cm.sup.2.S.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: May 16, 1995
    Assignee: Konica Corporation
    Inventor: Katsumi Matsuura
  • Patent number: 4409323
    Abstract: A silver halide photographic material containing a coupler capable of releasing a photographically useful group in a controllable timing.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: October 11, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ryosuke Sato, Yuji Hotta, Katsumi Matsuura
  • Patent number: 4368257
    Abstract: A method of forming a cyan dye image by development of an exposed silver halide photographic material with a developer containing a cyan coupler having one of the following formulae: ##STR1## wherein R.sub.1 is a hydrogen atom or alkyl having 1 to 20 carbon atoms; R.sub.2 is alkyl, aryl, or a hetero ring; R.sub.3 is hydrogen or halogen; X is arylene or alkylene; Z is a coupling off group; n is 1 or 2; ##STR2## wherein Cy, Cy' and Cy" are individually a cyclic aliphatic, aromatic or heterocyclic group; R, R' and R" are individually alkyl; A is hydrogen or a monovalent organic group, Y is a divalent organic group, K, l, m, m' m" are individually 0 or 1, provided that when m=0, Cy is a cyclic aliphatic or heterocyclic group.
    Type: Grant
    Filed: January 14, 1981
    Date of Patent: January 11, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yasushi Usagawa, Wataru Fujimatsu, Osamu Sasaki, Katsumi Matsuura
  • Patent number: 4362810
    Abstract: A method of forming a cyan dye image by development of an exposed silver halide photographic material with a developer containing a 2,5-diacylaminophenol cyan coupler containing a substituted alkylsulfonylamino terminal moiety or a substituted alkylaminosulfonyl terminal moiety in the 2- or 5- position.
    Type: Grant
    Filed: January 9, 1981
    Date of Patent: December 7, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yasushi Usagawa, Wataru Fujimatsu, Osamu Sasaki, Katsumi Matsuura
  • Patent number: 4353979
    Abstract: A silver halide photographic material containing a solution of a 5-pyrazolone type magneta coupler and a high-boiling organic solvent of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represent an aliphatic or aromatic group with a carbon atom of R.sub.3 directly bonded to the phosphorus atom.
    Type: Grant
    Filed: July 16, 1980
    Date of Patent: October 12, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Sadatugu Terada, Hideaki Arai, Kenji Itoh, Hiroshi Sugita, Katsumi Matsuura, Thuneo Wada
  • Patent number: 4326022
    Abstract: A high boiling solvent useful in silver halide materials is described by the following general formula: ##STR1## wherein R.sub.1 represents an alkyl radical, and each of R.sub.2 and R.sub.3 represent an aryl radical.
    Type: Grant
    Filed: December 1, 1980
    Date of Patent: April 20, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kenji Ito, Katsumi Matsuura, Hiroshi Sugita, Toshihiko Kimura, Hideaki Arai
  • Patent number: 4304844
    Abstract: A method for forming a cyan dye image by developing an exposed silver halide photographic material with a developer containing a color developing agent in the presence of a cyan coupler, wherein the coupler is a 2,5-diacylaminophenol in which each acylamino group has a substituent containing an oxycarbonyl, sulfonyloxy, oxysulfonyl, arylsulfonamide or arylsulfamoyl group or other organic group containing a sulfone group.
    Type: Grant
    Filed: May 1, 1980
    Date of Patent: December 8, 1981
    Inventors: Wataru Fujimatsu, Yasushi Usagawa, Osamu Sasaki, Katsumi Matsuura
  • Patent number: 4299914
    Abstract: A method for forming a cyan dye image by development of an exposed silver halide photographic material with a developer containing a cyan coupler of the following formula: ##STR1## in which R represents hydrogen atom or an alkyl group having a carbon number of one to twenty; R.sub.1 represents an alkylsulfonamide or alkylsulfamoyl group; R.sub.2 represents an alkyl, aryl group or a 5 or 6-membered heterocyclic group containing a nitrogen, oxygen or sulfur atom; R.sub.3 represents a hydrogen or halogen atom; X represents an alkylene, metaphenylene or orthophenylene group; Z represents a hydrogen atom or a split-off radical; and n has an integral value of one or two.
    Type: Grant
    Filed: May 1, 1980
    Date of Patent: November 10, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Wataru Fujimatsu, Yasushi Usagawa, Osamu Sasaki, Katsumi Matsuura
  • Patent number: 3932185
    Abstract: A multi-layer photosensitive material for color photography comprising a support and coated thereon, a first color image-forming layer unit composed of a red-sensitive silver halide emulsion, a second color image-forming layer unit composed of a green-sensitive silver halide emulsion and a third color image-forming layer unit composed of a blur-sensitive silver halide emulsion; characterized in that at least one of said color image-forming layer units has a composite layer structure including a lower layer and an upper layer which are positioned in sequence from the support, said upper layer has a higher sensitivity and a lower maximum developed color density than said lower layer, and at least one of said upper layer and lower layer contains a mercaptan type development inhibitor-releasing compound capable of reacting with an oxidation product of a primary aromatic amine to form a substantially colorless compound.
    Type: Grant
    Filed: August 12, 1974
    Date of Patent: January 13, 1976
    Assignee: Konishiroku Photo Industry Co., Inc.
    Inventor: Katsumi Matsuura