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).
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Patent number: 6542786Abstract: 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: GrantFiled: December 7, 2000Date of Patent: April 1, 2003Assignee: Sanyo Electric Co., Ltd.Inventors: Yoshinori Kano, Haruhiko Yamaguchi, Ikuo Takemura, Jun Asai
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Patent number: 6538678Abstract: 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: GrantFiled: July 5, 2001Date of Patent: March 25, 2003Assignee: Canon Kabushiki KaishaInventors: Takahiro Nakase, Jun Asai, Yuji Kamiya
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Publication number: 20030031488Abstract: 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: ApplicationFiled: July 31, 2002Publication date: February 13, 2003Applicant: Canon Kabushiki KaishaInventors: Tsuyoshi Kunishi, Jun Asai, Keizo Ogara
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Patent number: 6516161Abstract: 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: GrantFiled: March 13, 2001Date of Patent: February 4, 2003Assignee: Canon Kabushiki KaishaInventor: Jun Asai
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Publication number: 20030021618Abstract: 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: ApplicationFiled: July 25, 2002Publication date: January 30, 2003Applicant: Canon Kabushiki KaishaInventors: Keizo Ogara, Jun Asai, Koki Watanabe
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Publication number: 20020181981Abstract: 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: ApplicationFiled: March 12, 2002Publication date: December 5, 2002Applicant: Canon Kabushiki KaishaInventors: Kazuhumi Muto, Jun Asai, Koki Watanabe, Keizo Ogara
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Publication number: 20020054378Abstract: 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: ApplicationFiled: July 5, 2001Publication date: May 9, 2002Inventors: Ryuji Kawano, Jun Asai, Yuji Kamiya
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Publication number: 20020005887Abstract: 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: ApplicationFiled: July 5, 2001Publication date: January 17, 2002Inventors: Takahiro Nakase, Jun Asai, Yuji Kamiya
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Publication number: 20010033754Abstract: An image forming apparatus comprises:Type: ApplicationFiled: March 13, 2001Publication date: October 25, 2001Inventor: Jun Asai
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Publication number: 20010007961Abstract: 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: ApplicationFiled: December 7, 2000Publication date: July 12, 2001Inventors: Yoshinori Kano, Haruhiko Yamaguchi, Ikuo Takemura, Jun Asai
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Patent number: 5438399Abstract: 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: GrantFiled: January 18, 1994Date of Patent: August 1, 1995Assignee: Canon Kabushiki KaishaInventor: Jun Asai
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Patent number: 5406360Abstract: 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: GrantFiled: July 14, 1993Date of Patent: April 11, 1995Assignee: Canon Kabushiki KaishaInventor: Jun Asai
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Patent number: 5267005Abstract: 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: GrantFiled: December 31, 1991Date of Patent: November 30, 1993Assignee: Canon Kabushiki KaishaInventors: Akira Yamamoto, Jun Asai, Atsushi Hosoi, Kensaku Kusaka, Yoshiaki Kobayashi, Hidekazu Maruta, Shigeo Kimura
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Patent number: 5182604Abstract: 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: GrantFiled: March 15, 1991Date of Patent: January 26, 1993Assignee: Canon Kabushiki KaishaInventor: Jun Asai
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Patent number: 5150165Abstract: 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: GrantFiled: April 9, 1991Date of Patent: September 22, 1992Assignee: Canon Kabushiki KaishaInventor: Jun Asai
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Patent number: 4814886Abstract: 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: GrantFiled: June 28, 1988Date of Patent: March 21, 1989Assignee: Canon Kabushiki KaishaInventors: Tsukasa Kuge, Takahiro Inoue, Yasushi Sato, Akio Suzuki, Yoshihiro Murasawa, Hiroshi Sasame, Jun Asai
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Patent number: 4719489Abstract: 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: GrantFiled: June 16, 1987Date of Patent: January 12, 1988Assignee: Canon Kabushiki KaishaInventors: Masaharu Ohkubo, Yasumasa Ohtsuka, Jun Asai, Yoshihiro Murasawa
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Patent number: 4626096Abstract: 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: GrantFiled: March 29, 1985Date of Patent: December 2, 1986Assignee: Canon Kabushiki KaishaInventors: Yasumasa Ohtsuka, Jun Asai, Yoshihiro Murasawa, Hiroshi Sasame, Masaharu Ohkubo
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Patent number: 4563694Abstract: 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: GrantFiled: February 6, 1984Date of Patent: January 7, 1986Assignee: Canon Kabushiki KaishaInventors: Masaharu Ohkubo, Yoshihiro Murasawa, Yasumasa Ohtsuka, Jun Asai