Patents by Inventor Takamasa Sawada

Takamasa Sawada 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: 5225881
    Abstract: An image recording apparatus includes a sheet material accommodating device for accommodating sheet materials, a sheet material feeding device for feeding the sheet materials from the sheet material accommodating device, an image recording device for recording images on the sheet materials fed by the feeding device, sheet material refeeding device for refeeding to the image recording device through a refeeding passage the sheet material on which an image has been formed by the image recording device, a sheet material reversing device for reversing the sheet material and conveying it to the image recording device, the sheet material reversing device being disposed downstream of the refeeding passage with respect to a movement direction of the sheet material substantially within a projection area of the sheet material accommodating device.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: July 6, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinji Goto, Hiroo Kobayashi, Masao Ando, Takamasa Sawada
  • Patent number: 5091754
    Abstract: This invention relates to an image forming apparatus having a convey path comprising lateral movement apparatus for controlling a widthwise position of a sheet member to be conveyed, wherein the lateral movement apparatus is curved in a convey direction.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: February 25, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Abe, Junichi Kimizuka, Akihisa Kusano, Kaoru Sato, Toshiyuki Ito, Kazuhiko Okazawa, Toshihiko Inuyama, Takahiro Azeta, Yoshiro Tsuchiya, Hiroshi Yukimachi, Tadashi Yagi, Hiroo Kobayashi, Masahito Otsuka, Tsuyoshi Waragai, Takamasa Sawada, Hiroaki Miyake, Toshifumi Moritani
  • Patent number: 4888620
    Abstract: An image forming apparatus includes a main assembly and a process cartridge. The main assembly contains and retains an electrophotographic photosensitive member, and therefore, the photosensitive member is not contained in the process cartridge. The process cartridge contains an electric charger, a developing device and/or cleaning device. The process cartridge is detachably mountable into the main assembly.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: December 19, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hitoshi Fujino, Takamasa Sawada, Hiroo Kobayashi, Osamu Ohuchi, Tadashi Yagi, Yasuyoshi Hayakawa
  • Patent number: 4866487
    Abstract: An image forming apparatus provided with a mechanism for discharging the sheet which has been image-processed. The sheet supplying station accommodating a cassette or the like and the image forming station containing a photosensitive member or the like are substantially vertically aligned. The apparatus comprises a sheet reversing and discharging mechanism for inverting the face orientation of the sheet and then discharging it. The sheet reversing and discharging mechanism has a sheet switch-back passage which is disposed between the sheet supplying station and the image forming station, the sheet switch-back passage extending substantially horizontally. Additionally, the apparatus includes a device for selectively shifting the discharged sheets so as to form groups of sheets, without disturbing already-formed groups.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: September 12, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Osamu Ohuchi, Takamasa Sawada
  • Patent number: 4685793
    Abstract: In an image forming apparatus for forming images at an image forming section after conveying sheet materials by the one side reference method, sheet materials of sizes smaller than a predetermined size are conveyed in accordance with a one side reference position, and sheet materials of sizes larger than the predetermined size are guided in accordance with a position shifted from the one side reference position.
    Type: Grant
    Filed: September 23, 1986
    Date of Patent: August 11, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takamasa Sawada, Junji Ihikawa
  • Patent number: 4361399
    Abstract: An apparatus for releasing a sheet-registration mechanism, including primary and secondary register members which cooperates with each other for registering a projected image of an original with a sheet being fed, and an openable cover member located at such a position that is spaced laterally from an apparatus for cooperating with the secondary register member to release the nip between the primary and secondary register members.
    Type: Grant
    Filed: October 28, 1980
    Date of Patent: November 30, 1982
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takamasa Sawada, Akiyoshi Torigai, Teruo Morikawa
  • Patent number: 4337935
    Abstract: A copying apparatus has a manual insertion paper feeding mechanism having a manual insertion portion discrete from an insertion portion through which normally used paper may be inserted for conveyance thereof, register device for once stopping paper inserted through the manual insertion portion and thereafter conveying the paper at an adjusted timing, and slip feeder provided between the manual insertion portion and the register device for effecting forward feeding of the paper inserted through the manual insertion portion and for effecting slip feeding of the paper while maintaining the forward feeding condition when the forward movement of the paper is stopped by stoppage of the register device.
    Type: Grant
    Filed: May 20, 1980
    Date of Patent: July 6, 1982
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takamasa Sawada, Yoshiaki Sone, Kanou Tanaka
  • Patent number: 4113377
    Abstract: A reader-printer comprises a housing having a viewing opening, a screen disposed within the housing, means for moving the screen between an exposure position and a position spaced apart from the exposure position, means for projecting the image of a film onto the exposure position, means for feeding a copy sheet to the exposure position, means for delivering the copy sheet from the exposure position, and means for controlling external light entering the housing through the viewing opening.
    Type: Grant
    Filed: June 14, 1977
    Date of Patent: September 12, 1978
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiaki Sone, Takamasa Sawada, Masanari Shirai
  • Patent number: 4054379
    Abstract: A reader-printer comprises a housing having a viewing opening, a screen disposed within the housing, means for moving the screen between an exposure position and a position spaced apart from the exposure position, means for projecting the image of a film onto the exposure position, means for feeding a copy sheet to the exposure position, means for delivering the copy sheet from the exposure position, and means for controlling external light entering the housing through the viewing opening.
    Type: Grant
    Filed: September 26, 1975
    Date of Patent: October 18, 1977
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiaki Sone, Takamasa Sawada, Masanari Shirai
  • Patent number: 3988064
    Abstract: A reader-printer comprises means for illuminating a film, lens means for projecting therethrough an image in the film, a viewing screen, a photosensitive medium, means for moving the photosensitive medium, and means for causing the photosensitive medium to be slit-exposed to the image in the moving film. Light splitting means is provided in the optical path of image projection so as to split part of the image light projected through the lens means to travel toward the viewing screen and the photosensitive medium so that only part of the image light projected upon the viewing screen is directed to the photosensitive medium.
    Type: Grant
    Filed: October 31, 1974
    Date of Patent: October 26, 1976
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiaki Sone, Takamasa Sawada