Patents by Inventor Masao Maeda

Masao Maeda 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: 20020021453
    Abstract: A printing apparatus which quickly cancels a print job without any influence on the subsequent other print jobs when a print cancel instruction is issued. During printing, if a print cancel instruction is inputted from a printer operation unit 107, a printer function manager 109 notifies a print command interpreter 108 of the cancellation. The print command interpreter 108 searches data processed at that time in a transmission/reception buffer for an end mark command indicating the end of the cancelled job. Then the print command interpreter 108 deletes the data before the end mark command.
    Type: Application
    Filed: July 13, 2001
    Publication date: February 21, 2002
    Inventors: Kazuya Sakamoto, Takayuki Fujita, Tsutomu Takahashi, Mikio Shiga, Hiroshi Maruoka, Tetsuya Kawanabe, Nobuo Onuma, Masao Maeda, Nobuhiro Saito, Shunichi Kunihiro, Takashi Imoto, Kazuhisa Ebuchi
  • Patent number: 6261010
    Abstract: Printing apparatus and print control method for efficiently utilizing buffer memories. In a case of performing printing operation by controlling scanning of a printhead and four buffer memories where K, C, M and Y color image data are temporarily stored respectively, the color component data is inputted to the buffer memories while monitoring the data storage, and based on the monitoring result, discrimination is made as to whether or not at least one of the buffer memories has become full. Also, a print width, a conveyance amount of a print medium, and color component data to be cleared upon printing are dynamically determined based on a printable width of the printhead and the contents of the inputted color component data (monochrome image, color image, mixture of monochrome and color image).
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: July 17, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masao Maeda
  • Patent number: 6193358
    Abstract: Per every one printing scan of a head, a printing data to be printed by the corresponding scan is divided into L in a scanning direction (lateral direction) and N in a paper feeding direction (longitudinal direction. Concerning each counting blocks identified by l and number of driving rln is counted. Then, with respect to each l, rln are sequentially summed from n=1 to obtain Sl. At every time of summing for deriving Sl, judgment is made whether Sl is greater than a predetermined value R determined in association with a power source capacity. When judgment is made that Sl is greater than R, printing of a printing data corresponding to the counting blocks of 1 to (n−1) with respect to n−1 which is one smaller value that the value n of the counting block upon judgment that Sl is greater than R, is performed, and then paper feeding is performed for the corresponding counting blocks. Thus, lowering of throughput can be restricted with optimally using the power source capacity of the apparatus.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: February 27, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Miyuki Fujita, Masao Maeda, Minako Kato
  • Patent number: 6139127
    Abstract: An ink-jet recording method and a recording apparatus used in the method detect a blank region of an image, and enable backward printing only when detecting those blanks at the top and bottom ends of a region where printing can be performed by one scan. The ink-jet recording method and the recording apparatus prevent irregular images, that would otherwise be caused by consecutive rows printed by the backward printing, and execute forward and backward printing while reducing the color difference between the printing directions so that a high-quality output can be obtained at high speed. As a result, when ink is ejected before the ejection of a print-characteristic improving liquid, the image quality of a border in contact with a region including the print-characteristic improving liquid in the main-scan direction and the sub-scan direction can be improved.
    Type: Grant
    Filed: December 24, 1997
    Date of Patent: October 31, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Minako Kato, Masao Maeda, Miyuki Fujita
  • Patent number: 5899614
    Abstract: Output apparatus and method of a printer, a display, or the like for receiving a group of commands from a host computer and for changing subsequent data processes. The output apparatus comprises: a substituting circuit for substituting another discrimination information for discrimination information to be changed in accordance with an input of instruction information to instruct a change in discrimination information stored; and an executing circuit for executing a predetermined operation shown by the discrimination information before it is substituted by the substituting circuit in accordance with an input of the discrimination information substituted by the substituting circuit. A command table of an output unit is rewritten by a special command from the host computer, thereby enabling a desired outputting process to be selectively executed while the host computer easily discriminates the output unit.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: May 4, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masao Maeda, Wataru Sakagami
  • Patent number: 5856386
    Abstract: A crystalline thermoplastic resin composition comprises a rosin acid metallic salt and a crystalline thermoplastic resin. Optionally, a compatibilizing agent may also be included. The rosin acid metallic salt, which acts as a crystal nucleating agent, increases the crystallization rate of the crystalline thermoplastic resin and enables the formation of fine crystals of the resin. Thus, the crystalline thermoplastic resin composition can crystallize at a high rate, and provide molded articles having excellent mechanical properties and/or optical properties.
    Type: Grant
    Filed: January 22, 1997
    Date of Patent: January 5, 1999
    Assignees: Mitsui Petrochemicals Industries, Ltd., Arakawa Chemical Industries, Ltd.
    Inventors: Hideki Sakai, Mikio Nakagawa, Tetsuji Kasai, Kimio Ueda, Masao Maeda, Yukiharu Yamada, Hiroyuki Hori, Junji Tan, Kan Matsumoto
  • Patent number: 5606016
    Abstract: A process for preparing colorless rosins characterized by dehydrogenating purified hydrogenated rosins in the presence of a dehydrogenating catalyst. The colorless rosins obtained according to the process of the present invention are nearly colorless in appearance, odorless and excellent in stabilities, particularly are excellent in various properties such as odor, stabilities and compatibility in a heated state. Accordingly the above-mentioned colorless rosins are suitably used not only as modifiers for soap-type cleaning compositions, but also as emulsifiers for synthetic rubbers and emulsion polymerization in the form of alkali metal salts thereof.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: February 25, 1997
    Assignee: Arakawa Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masao Maeda, Yukiharu Yamada, Yutaka Koba
  • Patent number: 5395920
    Abstract: The present invention relates to a process for preparing a rosin ester, which comprises esterifying a purified product of a disproportionated rosin with an alcohol, and then subjecting the esterified rosin to dehydrogenation in the presence of a dehydrogenating catalyst, a process for preparing a rosin ester, which comprises heating a purified rosin and an alcohol in the presence of a disproportionating catalyst, simultaneously subjecting the resulting rosin to disproportionation and esterification, dehydrogenating the reactant in the presence of a dehydrogenating catalyst, and thereafter adding an organic phosphorus compound to the reaction system, a process for preparing a colorless rosin, which comprises simultaneously subjecting a purified rosin to disproportionation and dehydrogenation in the presence of a catalyst, and then adding an organic phosphorus compound to the reaction system and a process for preparing a colorless rosin, which comprises dehydrogenating a purified disproportionated rosin in the
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: March 7, 1995
    Assignee: Arakawa Kagaku Kogyp Kabushiki Kaisha
    Inventors: Masao Maeda, Yukiharu Yamada, Yutaka Koba
  • Patent number: 5387669
    Abstract: The present invention relates to a process for preparing a rosin ester, which comprises esterifying a purified product of a disproportionated rosin with an alcohol, and then subjecting the esterified rosin to dehydrogenation in the presence of a dehydrogenating catalyst, a process for preparing a rosin ester, which comprises heating a purified rosin and an alcohol in the presence of a disproportionating catalyst, simultaneously subjecting the resulting rosin to disproportionation and esterification, dehydrogenating the reactant in the presence of a dehydrogenating catalyst, and thereafter adding an organic phosphorus compound to the reaction system, a process for preparing a colorless rosin, which comprises simultaneously subjecting a purified rosin to disproportionation and dehydrogenation in the presence of a catalyst, and then adding an organic phosphorus compound to the reaction system and a process for preparing a colorless rosin, which comprises dehydrogenating a purified disproportionated rosin in the
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: February 7, 1995
    Assignee: Arakawa Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masao Maeda, Yukiharu Yamada, Yutaka Koba
  • Patent number: 5110352
    Abstract: An aluminum material for use as an electronic material is produced by a method comprising the steps of melting aluminum inevitably containing U and Th to obtain molten aluminum, holding the molten aluminum heated at a temperature above the solidification temperature thereof, and immersing a hollow rotary cooling member in the molten aluminum and rotating the cooling member in the molten aluminum while maintaining the surface of the cooling member at a temperature lower than the solidification temperature by supplying a cooling fluid to the interior of the cooling member to cause aluminum to crystallize out on the surface of the cooling member with reduced U and Th contents.
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: May 5, 1992
    Assignee: Showa Aluminum Corporation
    Inventors: Kazuo Toyoda, Masao Maeda
  • Patent number: 4906733
    Abstract: A process for preparing a colorless rosin comprising a step for purifying a disproportionated rosin and hydrogenating the rosin. According to the process, a rosin having a color nearly equal to colorless and is excellent in various properties such as odorless at heating and stability is prepared.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: March 6, 1990
    Assignee: Arakawa Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshihiro Kodama, Masao Maeda, Kiyoshi Kanagawa
  • Patent number: 4889728
    Abstract: This invention provides a chewing gum kit which consists of a special powdery chewing gum component (A) containing hydrous crystalline maltose as formed by hydrating the anhydrous crystalline maltose incorporated in the chewing gum texture and a liquid component (B) for contacting with the chewing gum to congeal the powder at the site of contact and thereby provide a mass of chewing gum, so that the powdery chewing gum is easily converted to a mass of chewing gum on bringing both components together and applying a given force.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: December 26, 1989
    Assignees: Kanebo, Ltd., Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo
    Inventors: Masao Maeda, Michiyo Fukuse, Tohru Miyaaki, Toshio Miyake
  • Patent number: 4847010
    Abstract: A process for preparing a rosin ester which comprises purifying a rosin and/or a disproportionated rosin, esterifying the resulting purified rosin and/or purified disproportionated rosin with an alcohol and subjecting the esterified rosin and/or esterified disproportionated rosin to hydrogenating. The resulting rosin ester has superior color nearly equal to colorless and is excellent in various properties such as odor at heating, stability and compatibility with organic polymers.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: July 11, 1989
    Assignee: Arakawa Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masao Maeda, Yoshihiro Kodama
  • Patent number: 4739643
    Abstract: A manufacturing method for a diamond coil for a rotating electric machine comprises bending a straight conductor in a first plane at eight points so as to produce coil leads, coil ends, and coil straight portions. The conductor is next twisted about its longitudinal axis so as to bend the coil ends out of the first plane. The conductor is then bent in two in a second plane, which is perpendicular to the first plane and which includes the longitudinal axis of the conductor, until the two leads of the conductor point in approximately the same direction.
    Type: Grant
    Filed: April 14, 1987
    Date of Patent: April 26, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kei Kuriyama, Masao Maeda, Sakuhei Ohashi
  • Patent number: 4208432
    Abstract: A powdery anti-stick agent for keeping the surface of a sticky surface of candy or chewing gum non-adhesive, comprising: a compound selected from a group consisting of .alpha.-lactose, .beta.-lactose, calcium carbonate and mixtures thereof coated with a compound selected from a group consisting of saturated fatty acid monoglycerides and derivatives thereof. A process for producing the above powdery releasing agent.
    Type: Grant
    Filed: December 28, 1977
    Date of Patent: June 17, 1980
    Assignee: Kanebo Foods, Ltd.
    Inventors: Ken-Ichi Noborio, Masao Maeda