Patents by Inventor Jun Asai

Jun Asai 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: 6542786
    Abstract: Apparatus for feeding electronic components comprises a slide base, a plurality of tape cassettes mounted on the slide base, a linear motor 14, and a control unit for the motor. The control unit includes a motor driver 61, a memory device 66, and a control device 67 which controls the motor driver 61 using data stored in the memory device 66. The control device 67 adjusts the data for controlling the motor according to the load weight of the slide base. The data is used for properly moving the slide base carrying a plurality of tape cassettes to a position for feeding the components.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: April 1, 2003
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Yoshinori Kano, Haruhiko Yamaguchi, Ikuo Takemura, Jun Asai
  • Patent number: 6538678
    Abstract: A high quality image forming apparatus capable of outputting a quality image at a high speed is provided, with which no unevenness is generated on an image and a fog or a change in density is less likely to occur. An exposing unit is operated by an over-filled scanner method for exposure by a rotational polygon mirror that reflects lights on a surface narrower than an incident beam width, and forms an electrostatic latent image by back area exposure for exposing a non-image part.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: March 25, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takahiro Nakase, Jun Asai, Yuji Kamiya
  • Publication number: 20030031488
    Abstract: An image forming apparatus includes an image bearing member; driving means for driving the image bearing member; latent image forming means for forming an electrostatic latent image on the image bearing member; developing means for developing the electrostatic latent image on the image bearing member with a developer; a cleaning member, contacted to the image bearing member, for cleaning a surface of the image bearing member; vibration imparting means for vibrating the cleaning member; control means for causing the latent image forming means to form an electrostatic latent image pattern for electrostatically attracting the developer deposited on the cleaning member and for causing the driving means to move the electrostatic latent image pattern to a contact portion where the cleaning member is contacted to the image bearing member.
    Type: Application
    Filed: July 31, 2002
    Publication date: February 13, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventors: Tsuyoshi Kunishi, Jun Asai, Keizo Ogara
  • Patent number: 6516161
    Abstract: An image forming apparatus includes an image bearing member and an image formation unit for forming an image on the image bearing member. The image formation unit is provided with a charger for charging the image bearing member. A potential detector detects a surface potential on the image bearing member charged by the charger. A controller controls an image formation condition of the image formation unit on the basis of a potential detected by the potential detector. The controller controls the image formation condition on the basis of a plurality of detected potentials corresponding to respectively different non-image areas between sequentially formed images.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: February 4, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventor: Jun Asai
  • Publication number: 20030021618
    Abstract: A cleaning device includes a cleaning member for cleaning a surface of an image bearing member while it is moving; holding means for holding the cleaning member; vibrating means which per se is vibratable; control means for controlling operation of the vibrating means; wherein the holding means is movable toward and away from the image bearing member; the vibrating means is held on the holding means; and the control means actuates the vibrating means upon stop of movement of the image bearing member.
    Type: Application
    Filed: July 25, 2002
    Publication date: January 30, 2003
    Applicant: Canon Kabushiki Kaisha
    Inventors: Keizo Ogara, Jun Asai, Koki Watanabe
  • Publication number: 20020181981
    Abstract: A cleaning device comprising a cleaning member contactable to a moving image bearing member to clean a surface of the image bearing member; holding means for holding the cleaning member; vibrating means which is vibratable; wherein the holding means this movable toward and away from the image bearing member, and wherein the vibrating means is supported on the holding means.
    Type: Application
    Filed: March 12, 2002
    Publication date: December 5, 2002
    Applicant: Canon Kabushiki Kaisha
    Inventors: Kazuhumi Muto, Jun Asai, Koki Watanabe, Keizo Ogara
  • Publication number: 20020054378
    Abstract: In a case where minute dirt is lain between light source and an original, since the light source moves in case of the fixing original reading which is an original reading system of reading an original image by fixing the original, the dirt is momently lighted by the light source and influence by the dirt for the read image is appeared in sight by only a minute dot. However, in case of the shifting original reading of reading the original image by shifting the original, since the relationship between the light source and the dirt is in a fixed state, the light source is always to light the dirt and the influence by the dirt for the read image is appeared in sight by a line or a plane. Therefore, in the present invention, edge emphasis degree of edge emphasis processing for the read image data is varied in accordance with a fact that the original reading system is the fixing original reading or the shifting original reading. Accordingly, the influence by the dirt in the shifting original reading can be reduced.
    Type: Application
    Filed: July 5, 2001
    Publication date: May 9, 2002
    Inventors: Ryuji Kawano, Jun Asai, Yuji Kamiya
  • Publication number: 20020005887
    Abstract: A high quality image forming apparatus capable of outputting a quality image at a high speed is provided, with which no unevenness is generated on an image and a fog or a change in density is less likely to occur. An exposing unit is operated by an over-filled scanner method for exposure by a rotational polygon mirror that reflects lights on a surface narrower than an incident beam width, and forms an electrostatic latent image by back area exposure for exposing a non-image part.
    Type: Application
    Filed: July 5, 2001
    Publication date: January 17, 2002
    Inventors: Takahiro Nakase, Jun Asai, Yuji Kamiya
  • Publication number: 20010033754
    Abstract: An image forming apparatus comprises:
    Type: Application
    Filed: March 13, 2001
    Publication date: October 25, 2001
    Inventor: Jun Asai
  • Publication number: 20010007961
    Abstract: Apparatus for feeding electronic components comprises a slide base, a plurality of tape cassettes mounted on the slide base, a linear motor 14, and a control unit for the motor. The control unit includes a motor driver 61, a memory device 66, and a control device 67 which controls the motor driver 61 using data stored in the memory device 66. The control device 67 adjusts the data for controlling the motor according to the load weight of the slide base. The data is used for properly moving the slide base carrying a plurality of tape cassettes to a position for feeding the components.
    Type: Application
    Filed: December 7, 2000
    Publication date: July 12, 2001
    Inventors: Yoshinori Kano, Haruhiko Yamaguchi, Ikuo Takemura, Jun Asai
  • Patent number: 5438399
    Abstract: An image forming apparatus includes a movable image bearing member; an image forming device for forming an image on the image bearing member; a charging member press-contacted to or faced to the image bearing member to transfer the image from the image bearing member onto the transfer material passed therebetween; a bias voltage applying device for applying a bias voltage to the charging member, wherein the voltage applying device constant-voltage-controlled the charging member in a period when an image region of the image bearing member is present in the transfer position, and constant-current-controls the charging member in another period, and wherein a voltage applied to the charging member during the constant voltage control is a sum of a voltage provided during the constant current control and a predetermined voltage.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: August 1, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventor: Jun Asai
  • Patent number: 5406360
    Abstract: The present invention provides an image forming apparatus with an image bearing member, an image forming device for forming a toner image on the image bearing member, and a transfer device adapted to transfer the toner image onto a transfer material at a transfer station and capable of contacting with a surface of the transfer material opposite to the image bearing member. A combined pressure force of the transfer material and transfer device against the image bearing member during a transferring operation is selected to be 0.2-8 grams per 1 cm in a longitudinal direction of the transfer device.
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: April 11, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventor: Jun Asai
  • Patent number: 5267005
    Abstract: A heating apparatus includes a heater which is stationary in use; a film in sliding contact with the heater; a pressing member cooperative with the film to form a nip therebetween; wherein the heater is provided with a portion which is stepped in a direction away from the film toward downstream with respect to a movement direction of the film, the stepped portion being in a width of the nip.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: November 30, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Yamamoto, Jun Asai, Atsushi Hosoi, Kensaku Kusaka, Yoshiaki Kobayashi, Hidekazu Maruta, Shigeo Kimura
  • Patent number: 5182604
    Abstract: An image forming apparatus includes an image bearing member movable along an endless path, an image forming system for forming a toner image on the image bearing member, and a transfer device for transferring the toner image from the image bearing member to a transfer material at a transfer position. The image forming system includes a charger for charging the image bearing member, and a developer. The transfer device includes a transfer member contactable to a backside of the transfer material. The transfer member is supplied with a voltage having a polarity which is the same as the charging polarity of the toner during a developing operation to transfer the toner from the transfer member to the image bearing member when the transfer material is absent at the transfer position. Also provided is a device for causing a region of the image bearing member to have a potential of the same polarity as the charging polarity of the charger before the region is charged by the charger for image formation.
    Type: Grant
    Filed: March 15, 1991
    Date of Patent: January 26, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventor: Jun Asai
  • Patent number: 5150165
    Abstract: An image forming apparatus having an image bearing member and an image transfer charger for transferring a toner image from the image bearing member onto a transfer material. The transfer charger has a transfer member contactable to the backside of the transfer material. The transfer member includes a conductive base, and a surface layer outside the eleastic layer. The transfer member's characteristics fall within the parameters of:5.times.10.sup.7 .ltoreq.R.sub.2 .ltoreq.5.times.10.sup.10 (ohm.cm), andR.sub.1 d.sub.1 /R.sub.2 d.sub.2 .gtoreq.10where r.sub.1 is a volume resistivity of the elastic layer, d.sub.1 is a thickness of the elastic layer, R.sub.2 is a volume resistivity of the surface layer, and d.sub.2 is a thickness of the surface layer.
    Type: Grant
    Filed: April 9, 1991
    Date of Patent: September 22, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventor: Jun Asai
  • Patent number: 4814886
    Abstract: An image processing process forms a plural microdots for each pixel, and the number of microdots increases only in one direction for representing a higher density, thereby achieving an improved linearity in the density levels without sacrificing the resolving power.
    Type: Grant
    Filed: June 28, 1988
    Date of Patent: March 21, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsukasa Kuge, Takahiro Inoue, Yasushi Sato, Akio Suzuki, Yoshihiro Murasawa, Hiroshi Sasame, Jun Asai
  • Patent number: 4719489
    Abstract: A recording apparatus includes a fixing device for fixing an image to be recorded, on a recording material selectively under a first fixing condition or a second fixing condition; a feeder for feeding the recording material to said fixing means selectively in a first recording material feed mode or a second recording material feed mode which is different from said first recording material feed mode; and a controller, responsive to the change of the recording material feed modes, for bringing said fixing means under the first fixing condition upon the first recording material feeding mode and to a second fixing condition, which is different from the first fixing condition, upon the second recording material feed mode.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: January 12, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaharu Ohkubo, Yasumasa Ohtsuka, Jun Asai, Yoshihiro Murasawa
  • Patent number: 4626096
    Abstract: An image forming apparatus is used in conjunction with a signal generator for producing an image signal representing an image to be recorded. The apparatus includes a device for forming a visible image with visible material on an image bearing member. The image is represented by the image signal produced by the signal generator. A time signal is also generated by a time signal generator and a measuring circuit measures the time signal so generated as a function of the production off the image signal by the image signal generator. Finally, a warning signal that indicates insufficiency of supply of the visible material for forming an image properly by the image forming device is produced on the basis of measurement of the time signal by the measuring circuit.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: December 2, 1986
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasumasa Ohtsuka, Jun Asai, Yoshihiro Murasawa, Hiroshi Sasame, Masaharu Ohkubo
  • Patent number: 4563694
    Abstract: An image information recording apparatus wherein a photosensitive member is scanned with a laser beam corresponding to the information signal of an image to be recorded, the power of the laser beam being controlled in accordance with the wavelength of the laser beam and the sensitivity of the photosensitive member.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: January 7, 1986
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaharu Ohkubo, Yoshihiro Murasawa, Yasumasa Ohtsuka, Jun Asai