Patents by Inventor Makoto Ohki
Makoto Ohki 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).
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Patent number: 6429886Abstract: An image processing apparatus capable of color image formation with a plurality of color components, which solves a problem of increment of processing time in monochrome image formation due to correction on image formation conditions with predetermined patch formation. For this purpose, in case of monochrome image formation, even if a tonality control request flag is set, an image formation sequence is started without performing tonality control. Thus processing time can be reduced in monochrome image formation.Type: GrantFiled: November 19, 1999Date of Patent: August 6, 2002Assignee: Canon Kabushiki KaishaInventor: Makoto Ohki
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Patent number: 6418281Abstract: High precision image density characteristics are stable maintained over extended periods of time. For this purpose, a first calibration operation is preformed in which a predetermined grayscale pattern is formed on a recording paper and this pattern is read by a reading device to produce a LUT for controlling the laser output in accordance with the image signal (gamma correction). A second calibration operation is performed after the first calibration operation wherein a patch is formed on an image carrier by the laser output controlled by the above LUT, its density is detected by a detector and a correction LUT is generated in accordance with the detected density.Type: GrantFiled: February 22, 2000Date of Patent: July 9, 2002Assignee: Canon Kabushiki KaishaInventor: Makoto Ohki
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Patent number: 6408145Abstract: An image forming apparatus has a monochrome mode for forming an image in a single color and a full-color mode for forming a full-color image in multiple colors. The image forming apparatus includes a photoconductor, a charging member contacting the photoconductor and charging the photoconductor with electricity, a power supply for applying, to the charging member, a DC voltage or a voltage including a DC voltage and an AC voltage in superimposed relation, and a unit for changing an AC component of the voltage applied to the charging member between the monochrome mode and the full-color mode.Type: GrantFiled: September 25, 2000Date of Patent: June 18, 2002Assignee: Canon Kabushiki KaishaInventor: Makoto Ohki
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Publication number: 20010043258Abstract: An image processing apparatus capable of color image formation with a plurality of color components, which solves a problem of increment of processing time in monochrome image formation due to correction on image formation conditions with predetermined patch formation. For this purpose, in case of monochrome image formation, even if a tonality control request flag is set, an image formation sequence is started without performing tonality control. Thus processing time can be reduced in monochrome image formation.Type: ApplicationFiled: November 19, 1999Publication date: November 22, 2001Inventor: MAKOTO OHKI
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Patent number: 6314251Abstract: An image forming apparatus in which each of first and second image forming device is in contact with surfaces of first and second image bearing members from which no after-transfer residual toner is removed includes a rotating charging member contacting first and second image bearing members, and a developing unit for developing an electrostatic image on the image bearing member and rotation controlling device rotates the second image bearing member and the charging member of the second image forming device during image formation only with the first image forming device.Type: GrantFiled: January 21, 2000Date of Patent: November 6, 2001Assignee: Canon Kabushiki KaishaInventors: Fumiteru Gomi, Satoru Fukushima, Yoichi Kimura, Makoto Ohki, Shigeru Matsuzaki, Kouichi Hashimoto, Yoshiyuki Komiya
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Patent number: 6229969Abstract: It is an object of this invention to provide an image forming apparatus having a plurality of image processing patterns in which to form an image and capable of improving the convenience and reducing the control time. The density variation of a printing pattern is 0.6 times (b/a) that of a photographic pattern. Experiments confirmed that this relationship exhibits substantially the same value even when the change is caused by some other image density characteristic change factor, such as a surrounding environmental change. Therfore, in forming a look-up table on the basis of density information of a gradation control patch, gradation control is so performed that a look-up table for the plurality of printing patterns is formed on the basis of information of a look-up table formed using the photographic pattern.Type: GrantFiled: October 25, 1999Date of Patent: May 8, 2001Assignee: Canon Kabushiki KaishaInventor: Makoto Ohki
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Patent number: 5681710Abstract: The present invention provides a reagent for determining (1.fwdarw.3)-.beta.-D-glucan comprising a lysate substantially free from any endotoxin-sensitive factor, which is obtained by contacting limulus amebocyte lysate optionally containing dextran with a polyamide or cellulose insoluble carrier, which makes it possible to rapidly and easily determine at a high accuracy (1.fwdarw.3)-.beta.-D-glucan of mycotic origin contained in the body fluid such as blood or urine.Type: GrantFiled: February 21, 1995Date of Patent: October 28, 1997Assignee: Seikagaku Kogyo Kabushiki KaishaInventors: Shigenori Tanaka, Hiroshi Tamura, Makoto Ohki
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Patent number: 5641643Abstract: This invention relates to a horseshoe crab amebocyte lysate factor G activation inhibitor comprising as an active ingredient a polyglycoside containing at least one poly-(1.fwdarw.3)-.beta.-D-glucoside structure portion consisting of 2 to 370 (1.fwdarw.3)-.beta.-D-glucoside structural units of the following formula ##STR1## which are continuously bound to one another. This inhibitor is useful for inhibiting the activation of factor G which may exist in horseshoe crab amebocyte lysate used in the Limulus test.Type: GrantFiled: October 13, 1995Date of Patent: June 24, 1997Assignee: Seikagaku Kogyo Co., Ltd.Inventors: Shigenori Tanaka, Jun Aketagawa, Makoto Ohki, Shoji Takahashi, Hiroshi Tamura, Yuko Shibata
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Patent number: 5550030Abstract: Disclosed are a reagent for endotoxin-specific assay which comprises an insoluble carrier having immobilized thereon at least an endotoxin-sensitive factor derived from a limulus amebocyte; a kit for endotoxin-specific assay containing said reagent and a substrate for activated factor C or a substrate for clotting enzyme; a method for assaying endotoxin comprising applying a sample solution to said reagent to cause endotoxin in the sample to react with factor C in said reagent and determining a change of a substrate; and a process for preparing said reagent which comprises physically or chemically immobilizing at least an endotoxin-sensitive factor derived from a limulus amebocyte on an insoluble carrier. Endotoxin in a sample, even turbid or colored, can be specifically assayed with ease and rapidness without the influence of a (1.fwdarw.3)-.beta.-glucan.Type: GrantFiled: September 14, 1993Date of Patent: August 27, 1996Assignee: Seikagaku Kogyo Kabushiki Kaisha (Seikagaku Corporation)Inventors: Shigenori Tanaka, Hiroshi Tamura, Makoto Ohki
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Patent number: 5512983Abstract: This invention relates to an electrophotography apparatus with a photosensitive body, first charge devices for performing a first charge process to form an image on the photosensitive body, a transfer charger for transferring the image formed on the photosensitive body onto a transfer material, and potential applying device for setting the photosensitive body at a predetermined potential by simultaneously performing a second charge process having the same polarity as a polarity of the first charge process and a full-surface exposure process on the photosensitive body, after the image is transferred by the transfer charger and before the first charge process is performed by the first charge device.Type: GrantFiled: July 6, 1994Date of Patent: April 30, 1996Assignee: Canon Kabushiki KaishaInventors: Satoru Fukushima, Makoto Ohki
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Patent number: 5474984Abstract: This invention relates to a horseshoe crab amebocyte lysate factor G activation inhibitor comprising as an active ingredient a polyglycoside containing at least one poly-(1.fwdarw.3)-.beta.-D-glucoside structure portion consisting of 2 to 370 (1.fwdarw.3)-.beta.-D-glucoside structural units of the following formula ##STR1## which are continuously bound to one another. This inhibitor is useful for inhibiting the activation of factor G which may exist in horseshoe crab amebocyte lysate used in the Limulus test.Type: GrantFiled: May 20, 1994Date of Patent: December 12, 1995Assignee: Seikagaku Kogyo Co., Ltd.Inventors: Shigenori Tanaka, Jun Aketagawa, Makoto Ohki, Shoji Takahashi, Hiroshi Tamura, Yuko Shibata
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Patent number: 5155032Abstract: This invention relates to a horseshoe crab amebocyte lysate factor G activation inhibitor comprising as an active ingredient a polyglycoside containing at least one poly-(1.fwdarw.3)-.beta.-D-glucoside structure portion consisting of 2 to 370 (1.fwdarw.3)-.beta.-D-glucoside structural units of the following formula ##STR1## which are continuously bound to one another. This inhibitor is useful for inhibiting the activation of factor G which may exist in horseshoe crab amebocyte lysate used in the Limulus test.Type: GrantFiled: May 1, 1990Date of Patent: October 13, 1992Assignee: Seikagaku Kogyo Co., Ltd.Inventors: Shigenori Tanaka, Jun Aketagawa, Makoto Ohki, Shoji Takahashi, Hiroshi Tamura, Yuko Shibata