Patents by Inventor Kenichiro Waki
Kenichiro Waki 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: 8077300Abstract: A MTF measuring system includes measurement result screen data indicative of an object image and an MTF curve image are generated in accordance with the object image data obtained by photographing the object and the MTF curve image data indicative of the MTF curve generated from MTF data that become an index to evaluate lens performance. The measurement result screen based on the generated measurement result screen data is displayed on a real time basis in the case of evaluation measurement operations of the lens performance. A user can grasp the necessity for a focus adjustment from the MTF curve image on the measurement result screen. If necessary, the user can adjust the focus of the object displayed together with the MTF curve image, and at the same time can evaluate the lens performance from the MTF curve image.Type: GrantFiled: August 3, 2007Date of Patent: December 13, 2011Assignee: Acutelogic CorporationInventors: Takashi Masuda, Kouki Yoshida, Takaharu Aoki, Kenichiro Waki
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Publication number: 20100177303Abstract: Measurement result screen data indicative of an object image and an MTF curve image are generated in accordance with the object image data obtained by photographing the object and the MTF curve image data indicative of the MTF curve generated from MTF data that become an index to evaluate lens performance. The measurement result screen based on the generated measurement result screen data is displayed, so that the measurement result screen indicative of the object image and the MTF curve image can be displayed on a real time basis in the case of evaluation measurement operations of the lens performance. As a result, a user grasps necessity for a focus adjustment from the MTF curve image on the measurement result screen, if necessary, adjusts focus of the object displayed together with the MTF curve image, and at the same time can evaluate the lens performance from the MTF curve image.Type: ApplicationFiled: August 3, 2007Publication date: July 15, 2010Inventors: Takashi Masuda, Kouki Yoshida, Takaharu Aoki, Kenichiro Waki
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Publication number: 20090169126Abstract: An optical low pass filter (2) is formed, for example, by a birefringent plate so as to control the light beam separation width, thereby changing the cut-off frequency according to an imaging mode. The number of pixels of an imaging element (5) is set greater than the number of pixels corresponding to the dynamic image display resolution. In a still image capturing mode, the light beam separation width is set narrower so that the resolution of the imaging element (5) can be used as it is while suppressing generation of a false color to a certain degree. On the other hand, in a dynamic image capturing mode, the light beam separation width is set wider so that a high-frequency component corresponding to an unnecessary resolution component for an output image signal can be cut off and suppression of the false color can be performed strongly as compared to the still image capturing mode.Type: ApplicationFiled: January 16, 2007Publication date: July 2, 2009Applicant: ACUTELOGIC CORPORATIONInventors: Takashi Masuda, Masafumi Sei, Masahiko Honda, Hidetoshi Kubota, Kenichiro Waki
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Patent number: 6295432Abstract: An image forming apparatus includes an image bearing member for carrying an electrostatic image, a contact charger for electrically charging the image bearing member while contacting to a surface of the image bearing member, the contact charger forming an oscillating electric field having a frequency of 100-600 Hz; a developer for developing the electrostatic image on the image bearing member with a developer comprising toner and a carrier having a volume resistivity value of 106-1010 &OHgr;.Type: GrantFiled: December 23, 1997Date of Patent: September 25, 2001Assignee: Canon Kabushiki KaishaInventors: Masahiro Inoue, Yoshiaki Kobayashi, Kenichiro Waki, Masaru Hibino
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Patent number: 5895146Abstract: An image forming apparatus includes a charging device applies a voltage to charge an image bearing member. The charging device is provided with a charging means to which a voltage is applicable to charge said image bearing member, said charging means being provided with a magnetic particle carrying member for carrying and conveying a magnetic particle layer contacting with said image bearing member during the charging operation; a container contains magnetic particles therein; and a replacing device replaces the magnetic particles carried on the magnetic particle carrying member with the magnetic particles contained in the container. A developer develops a latent image produced on the image bearing member by the charging device using a toner to produce a toner image.Type: GrantFiled: January 8, 1997Date of Patent: April 20, 1999Assignee: Canon Kabushiki KaishaInventors: Kenichiro Waki, Masahiro Itoh, Ryo Inoue
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Patent number: 5835821Abstract: An image forming apparatus includes image bearing member for bearing a toner image; charging member contactable to the image bearing member to electrically charge the image bearing member; wherein .delta.V=.vertline.Vdc-Vs.vertline. is different between a first area of the image bearing member which is going to be image area and second area of the image bearing member which is going to be non-image area, where Vdc is a DC component of a voltage applied to the charging member, and Vs is is a potential of the image bearing member charged by the charging member.Type: GrantFiled: September 30, 1996Date of Patent: November 10, 1998Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Suzuki, Masahiro Itoh, Masahiro Inoue, Kenichiro Waki, Takeo Yamamoto, Ryo Inoue
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Patent number: 5805960Abstract: An image forming apparatus includes an electrostatic image bearing member for bearing an electrostatic image; a developer carrying member for carrying developer containing toner; a voltage source for applying to said developer carrying member, an oscillating voltage of a predetermined frequency: a toner image forming device for forming a toner image on said electrostatic image bearing member using said voltage source; a transferring device for transferring the toner image onto transfer material; and a removing device for removing, using said voltage source, the toner remaining on said electrostatic image bearing member after the use of said transferring device: the voltage satisfies: ##EQU1## V.sub.pp ?V!: peak-to-peak voltage of oscillating voltage V.sub.f ?Hz!: frequency of oscillating voltageV.sub.Type: GrantFiled: June 9, 1995Date of Patent: September 8, 1998Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Suzuki, Masahiro Itoh, Kenichiro Waki, Ryo Inoue
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Patent number: 5797070Abstract: An image forming apparatus includes at least a first image-forming unit provided with a first latent image-holding member, a first latent image-forming device, a first developing device for developing a first latent image with a first toner to form a first toner image, and a first image-transfer device for transferring the first toner image to an image-receiving member, and a second image-forming unit provided with a second latent image-holding member, a second latent image-forming device, a second developing device for developing a second latent image with a second toner to form a second toner image, and a second image-transfer device for transferring the second toner image to the image-receiving member holding the first toner image. The second developing device also serves as a cleaning device for recovering the toner remaining on the second latent image-holding member after the transfer to perform cleaning.Type: GrantFiled: April 21, 1997Date of Patent: August 18, 1998Assignee: Canon Kabushiki KaishaInventors: Kenichiro Waki, Masahiro Itoh, Hiroyuki Suzuki, Ryo Inoue
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Patent number: 5781832Abstract: An image forming apparatus has an image bearing member, charging means for uniformly charging the image bearing member, electrostatic image forming means for forming an electrostatic image on the image bearing member charged by the charging means, developing means for developing the electrostatic image on the image bearing member with a toner and also recovering any residual toner on the image bearing member, and transferring means for transferring the toner image to a transfer member conveyed. Upon re-operation after jam, at least one full rotation of the image bearing member effects the recovery of the toner on the image bearing member by the developing means with the charging by the charging means being rendered OFF.Type: GrantFiled: May 2, 1997Date of Patent: July 14, 1998Assignee: Canon Kabushiki KaishaInventors: Ryo Inoue, Kenichiro Waki, Hiroyuki Suzuki
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Patent number: 5758038Abstract: An image forming apparatus has a plurality of image forming units for forming, on an image receiving member such as a transfer sheet, toner images of a plurality of different colors such as magenta, cyan, yellow and black. Each of the image forming units includes a photosensitive drum serving as an image carrier, a developing device for developing an electrostatic latent image carried by the image carrier to form a color toner image, and a transfer device for transferring the toner image to the image receiving member. The developing device in the image forming unit for forming on the image receiving member the toner image of an (i+1)-th color is of the type capable of simultaneously performing both development and removal of residual toner. The transfer currents T.sub.i and T.sub.i+1 employed by the transfer units which perform transfer of the toner images of an i-th color and the (i+1)-th color satisfy the following condition (1).Type: GrantFiled: July 9, 1996Date of Patent: May 26, 1998Assignee: Canon Kabushiki KashiaInventors: Masahiro Itoh, Kenichiro Waki, Hiroyuki Suzuki, Ryo Inoue
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Patent number: 5576812Abstract: A developing method includes forming a magnetic field between an image bearing member bearing an electrostatic image and a developer carrying member carrying a developer comprising toner particles and carrier particles; and contacting chains of carrier particles formed on the developer carrying member to the image bearing member; wherein an absolute value of an intensity of a magnetic field in a movement direction of the developer carrying member over the entire portion of the developer carrying member at a position where the carrier is contacted to the image bearing member is positive.Type: GrantFiled: September 30, 1994Date of Patent: November 19, 1996Assignee: Canon Kabushiki KaishaInventors: Masaru Hibino, Yukio Nagase, Kenichiro Waki, Hiroyuki Suzuki
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Patent number: 5459559Abstract: A developing method for developing an electrostatic image on an image bearing member with a two-component developer includes the steps of bearing a developer containing toner particles and carrier particles on a developer bearing member to a contact region formed between the developer bearing member and an image bearing member bearing an electrostatic image thereon, and rubbing the image bearing member with the magnetic brush with a contact pressure equal to 0.7 gf/cm.sup.2 or less.Type: GrantFiled: October 5, 1994Date of Patent: October 17, 1995Assignee: Canon Kabushiki KaishaInventors: Yukio Nagase, Kenichiro Waki, Hiroyuki Suzuki, Masaru Hibino
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Patent number: 5438394Abstract: An image forming apparatus includes an image bearing member; a latent image forming device for forming on the image bearing member a dot distribution electrostatic latent image in accordance with image signals corresponding to an object image; a developing device for developing the latent image formed on the image bearing member by the latent image forming device, in a developing station and by a developer containing toner and magnetic carrier; wherein the developing device includes a developer carrying member for carrying and conveying the developer to the developing station, and a magnetic field generating device provided within the developer carrying member, for forming a magnetic brush of the developer and contacting the magnetic brush to the image bearing member; and wherein a degree .sigma.d (emu/cm.sup.Type: GrantFiled: June 29, 1993Date of Patent: August 1, 1995Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Suzuki, Yukio Nagase, Kenichiro Waki, Kazuhisa Kemmochi, Masaru Hibino
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Patent number: 5414497Abstract: A developing apparatus includes a guide member for guiding toner toward an image bearing member bearing an electrostatic image thereon, the guide member having a first end and a second end, a vibration generating device for applying an ultrasonic oscillation to the guide member proximate one of the first end and the second end of the guide member, and a vibration absorbing device for absorbing the ultrasonic oscillation in the guide member at the other one of the first end and the second end, wherein toner is conveyed on the guide member in a direction from the absorbing device to the vibration applying device. In one aspect, the toner is a magnetic toner, and a magnetic field is generated on the guide member at a position opposite a surface for guiding the toner.Type: GrantFiled: October 21, 1993Date of Patent: May 9, 1995Assignee: Canon Kabushiki KaishaInventors: Hiroaki Tsuchiya, Keishi Ohsawa, Yuji Sakemi, Kenichiro Waki, Nobuyuki Ito, Takehiro Takano, Yoshiro Tomikawa
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Patent number: 5329346Abstract: The present invention aims to solve problems caused in forming multiple images on the same transfer sheet in response to an original by using black toner and color toner, and prevents a shade of the original from being developed by the color toner which results in the indistinct copy image. To this end, according to the present invention, an area developed by the color toner is made narrower than an area developed by the black toner.Type: GrantFiled: September 18, 1992Date of Patent: July 12, 1994Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Suzuki, Kenichiro Waki
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Patent number: 5270484Abstract: An ultrasonic oscillation is applied in the neighborhood of one end of a guide member for supporting and guiding a powder, so that a transverse proceeding wave is generated in the guide member. The powder moves from the other end of the guide member toward a position of the applied ultrasonic oscillation under the action of this proceeding wave.Type: GrantFiled: September 11, 1991Date of Patent: December 14, 1993Assignee: Canon Kabushiki KaishaInventors: Hiroaki Tsuchiya, Keishi Ohsawa, Yuji Sakemi, Kenichiro Waki, Nobuyuki Ito, Takehiro Takano, Yoshiro Tomikawa
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Patent number: 5249022Abstract: The present invention provides an image forming apparatus including an image bearing member; image forming devices for forming a toner image on the image bearing member, the average volume particle diameter of the toner being 3-10 .mu.m; a movable transfer sheet bearing member for bearing a transfer sheet; and a transfer member for transferring the toner image formed on the image bearing member onto the transfer sheet carried by the transfer sheet bearing member at a transfer station. The transfer member includes a fiber brush engageable by the transfer sheet bearing means at a side opposite to the image bearing member at the transfer station.Type: GrantFiled: November 21, 1992Date of Patent: September 28, 1993Assignee: Canon Kabushiki KaishaInventors: Akira Watanabe, Tatsuo Takeuchi, Kenichiro Waki, Yasushi Miura, Takeo Tsunemi
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Patent number: 5081501Abstract: The present invention provides an image forming apparatus having a shiftable image bearing member; an image forming device for forming an image on the image bearing member; and a transfer device for transferring the image formed on the image bearing member onto a transfer sheet at a transfer station, the transfer device urging the transfer sheet against the image bearing member and having a transfer electrode to which a voltage is applied; and wherein a resistance value between a surface of the transfer electrode facing the image bearing member and a portion of the transfer electrode at which the voltage is applied is greater at an upstream side of a shifting direction of the image bearing member than at a downstream side thereof, on the surface of the transfer electrode, whereby an image can be obtained without any transfer void.Type: GrantFiled: May 29, 1991Date of Patent: January 14, 1992Assignee: Canon Kabushiki KaishaInventors: Kenichiro Waki, Takeo Tsunemi, Akira Watanabe
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Patent number: 5003351Abstract: An image forming apparatus includes an image bearing member, a latent image forming device for forming an electrostatic latent image on the image bearing member, a first developing device including a first developer carrying member for carrying a first developer thereon to supply it to the image bearing member, a second developing device including a second developer carrying member for carrying thereon a second developer having a different color from that of the first developer to supply it to the image bearing member, wherein a developer carrying surface of the developer carrying member has a surface property which is different from that of the first developer carrying member, and a bias voltage applying device for applying a first developing bias voltage to the first developer carrying member and for applying to the second developer carrying member a second bias voltage which is different from the first developing bias voltage.Type: GrantFiled: August 25, 1989Date of Patent: March 26, 1991Assignee: Canon Kabushiki KaishaInventors: Kenichiro Waki, Nobuhiro Hayashi