Patents by Inventor Takamitsu Soda
Takamitsu Soda 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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Publication number: 20130004204Abstract: An image forming apparatus includes a process unit arranged in the vicinity of the circumference of each photosensitive member and the process unit is configured to act on the photosensitive member in forming a toner image thereon. The image forming apparatus detects a time period since a laser beam emission unit emits a laser beam to the photosensitive member to form an electrostatic latent image for detection until the formed electrostatic latent image for detection or a toner image based on the electrostatic latent image for detection reaches the process unit, and performs color misregistration correction control based on the result of detection. In this case, a control unit at least decreases the light amount of a pre-exposure LED when the electrostatic latent image for detection passes through a position facing the pre-exposure LED.Type: ApplicationFiled: June 25, 2012Publication date: January 3, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Hiroshi Hagiwara, Takamitsu Soda, Akinobu Hirayama, Hiromitsu Kumada, Yoshiko Kubo, Takateru Ohkubo
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Publication number: 20120269557Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: ApplicationFiled: June 26, 2012Publication date: October 25, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiro DODA, Masaru SHIMURA, Shigeru HOASHI, Kenji KANARI, Seiji SAITO, Takashi SHIMADA, Takaaki AKAMATSU, Michio UCHIDA, Ken NAKAGAWA, Takamitsu SODA, Shuuichi TETSUNO
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Patent number: 8238782Abstract: Provided is an image forming apparatus having a charge brush for charging a transfer residual toner remaining on an intermediate transfer member. A toner is adhered to the charge brush. While a charge voltage is applied to the charge brush, the toner adhered to the charge brush is attracted by an electric field onto the charge brush. However, when the charge voltage is not applied to the charge brush, the toner adhered to the charge brush is moved to the intermediate transfer member. When a subsequent toner image is formed on the toner adhered to the intermediate transfer member, the quality of the subsequent image is deteriorated. Accordingly, the charge voltage is applied to the charge brush when an intermediate transfer area to which the toner image is transferred onto the intermediate transfer member immediately afterward faces the charge brush.Type: GrantFiled: August 18, 2011Date of Patent: August 7, 2012Assignee: Canon Kabushiki KaishaInventor: Takamitsu Soda
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Patent number: 8238807Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: GrantFiled: December 16, 2011Date of Patent: August 7, 2012Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Doda, Masaru Shimura, Shigeru Hoashi, Kenji Kanari, Seiji Saito, Takashi Shimada, Takaaki Akamatsu, Michio Uchida, Ken Nakagawa, Takamitsu Soda, Shuuichi Tetsuno
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Patent number: 8165512Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: GrantFiled: April 16, 2009Date of Patent: April 24, 2012Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Doda, Masaru Shimura, Shigeru Hoashi, Kenji Kanari, Seiji Saito, Takashi Shimada, Takaaki Akamatsu, Michio Uchida, Ken Nakagawa, Takamitsu Soda, Shuuichi Tetsuno
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Publication number: 20120087700Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: ApplicationFiled: December 16, 2011Publication date: April 12, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiro DODA, Masaru SHIMURA, Shigeru HOASHI, Kenji KANARI, Seiji SAITO, Takashi SHIMADA, Takaaki AKAMATSU, Michio UCHIDA, Ken NAKAGAWA, Takamitsu SODA, Shuuichi TETSUNO
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Publication number: 20110318035Abstract: An image forming apparatus for forming image on a recording medium includes a photosensitive member, a motor, a belt, and a drive member to rotate the belt, the drive member including a driven coupling. The apparatus also includes a drive coupling to rotate by a driving force generated by the motor, the drive coupling being movable in an axial direction to take an engagement position at which the driving force is transmittable to the driven coupling, and a release position. The apparatus further includes a transfer member to transfer a toner image onto the recording medium or the belt, a voltage application unit to apply a voltage to the transfer member, and a control unit to cause the voltage application unit to apply the voltage to the transfer member after the drive coupling moves to the engagement position and the driving force is transmitted to the driven coupling.Type: ApplicationFiled: September 7, 2011Publication date: December 29, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Masaru Shimura, Michio Uchida, Ken Nakagawa, Seiji Saito, Kenji Kanari, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda, Takashi Shimada, Shuuichi Tetsuno, Shigeru Hoashi, Tomoya Kuruma
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Publication number: 20110299872Abstract: Provided is an image forming apparatus having a charge brush for charging a transfer residual toner remaining on an intermediate transfer member. A toner is adhered to the charge brush. While a charge voltage is applied to the charge brush, the toner adhered to the charge brush is attracted by an electric field onto the charge brush. However, when the charge voltage is not applied to the charge brush, the toner adhered to the charge brush is moved to the intermediate transfer member. When a subsequent toner image is formed on the toner adhered to the intermediate transfer member, the quality of the subsequent image is deteriorated. Accordingly, the charge voltage is applied to the charge brush when an intermediate transfer area to which the toner image is transferred onto the intermediate transfer member immediately afterward faces the charge brush.Type: ApplicationFiled: August 18, 2011Publication date: December 8, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Takamitsu Soda
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Patent number: 8036574Abstract: An image forming apparatus for forming image on a recording medium includes a photosensitive member, a motor, a belt, and a drive member to rotate the belt, the drive member including a driven coupling. The apparatus also includes a drive coupling to rotate by a driving force generated by the motor, the drive coupling being movable in an axial direction to take an engagement position at which the driving force is transmittable to the driven coupling, and a release position. The apparatus further includes a transfer member to transfer a toner image onto the recording medium or the belt, a voltage application unit to apply a voltage to the transfer member, and a control unit to cause the voltage application unit to apply the voltage to the transfer member after the drive coupling moves to the engagement position and the driving force is transmitted to the driven coupling.Type: GrantFiled: March 31, 2009Date of Patent: October 11, 2011Assignee: Canon Kabushiki KaishaInventors: Masaru Shimura, Michio Uchida, Ken Nakagawa, Seiji Saito, Kenji Kanari, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda, Takashi Shimada, Shuuichi Tetsuno, Shigeru Hoashi, Tomoya Kuruma
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Patent number: 8027612Abstract: Provided is an image forming apparatus having a charge brush for charging a transfer residual toner remaining on an intermediate transfer member. A toner is adhered to the charge brush. While a charge voltage is applied to the charge brush, the toner adhered to the charge brush is attracted by an electric field onto the charge brush. However, when the charge voltage is not applied to the charge brush, the toner adhered to the charge brush is moved to the intermediate transfer member. When a subsequent toner image is formed on the toner adhered to the intermediate transfer member, the quality of the subsequent image is deteriorated. Accordingly, the charge voltage is applied to the charge brush when an intermediate transfer area to which the toner image is transferred onto the intermediate transfer member immediately afterward faces the charge brush.Type: GrantFiled: April 2, 2008Date of Patent: September 27, 2011Assignee: Canon Kabushiki KaishaInventor: Takamitsu Soda
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Publication number: 20110188902Abstract: An image forming apparatus includes an image bearing member for bearing a toner image; an endless rotatable intermediary transfer belt onto which the toner image is to be transferred from the image bearing member; a transfer device disposed at a position in which the transfer device opposes the image bearing member through the intermediary transfer belt, the transfer device including a sheet member surface-contacted to an inner surface of the intermediary transfer belt and including an urging member for urging the sheet member toward the intermediary transfer belt; and a primary transfer voltage source for applying a voltage to the sheet member.Type: ApplicationFiled: January 19, 2011Publication date: August 4, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Shinji Katagiri, Masaru Shimura, Ken Nakagawa, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda
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Publication number: 20090257779Abstract: An image forming apparatus for forming image on a recording medium includes a photosensitive member, a motor, a belt, and a drive member to rotate the belt, the drive member including a driven coupling. The apparatus also includes a drive coupling to rotate by a driving force generated by the motor, the drive coupling being movable in an axial direction to take an engagement position at which the driving force is transmittable to the driven coupling, and a release position. The apparatus further includes a transfer member to transfer a toner image onto the recording medium or the belt, a voltage application unit to apply a voltage to the transfer member, and a control unit to cause the voltage application unit to apply the voltage to the transfer member after the drive coupling moves to the engagement position and the driving force is transmitted to the driven coupling.Type: ApplicationFiled: March 31, 2009Publication date: October 15, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Masaru Shimura, Michio Uchida, Ken Nakagawa, Seiji Saito, Kenji Kanari, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda, Takashi Shimada, Shuuichi Tetsuno, Shigeru Hoashi, Tomoya Kuruma
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Publication number: 20090232530Abstract: An apparatus includes an image bearing member for carrying an image; an intermediary transfer member for receiving the image; a primary transfer member for transfer of the image onto the intermediary transfer member in a primary transfer station; a secondary transfer member for transfer of the image onto a transfer material in a secondary transfer station; a first charging member for charging toner remaining in a region upstream of the primary transfer station and downstream of the secondary transfer station; and a second charging member for charging the toner remaining in a region upstream of the primary transfer station and downstream of the first charging member. The first charging member rubs a surface of, and the second charging member moves in contact with, the intermediary transfer member, to transfer the toner remaining on the intermediary transfer member to the image bearing member simultaneously with the primary transfer.Type: ApplicationFiled: February 24, 2009Publication date: September 17, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Seiji Saito, Takuma Abe, Masaru Shimura, Ken Nakagawa, Kenji Kanari, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda, Takashi Shimada, Shuuichi Tetsuno
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Publication number: 20090202281Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: ApplicationFiled: April 16, 2009Publication date: August 13, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiro Doda, Masaru Shimura, Shigeru Hoashi, Kenji Kanari, Seiji Saito, Takashi Shimada, Takaaki Akamatsu, Michio Uchida, Ken Nakagawa, Takamitsu Soda, Shuuichi Tetsuno
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Publication number: 20080253807Abstract: Provided is an image forming apparatus having a charge brush for charging a transfer residual toner remaining on an intermediate transfer member. A toner is adhered to the charge brush. While a charge voltage is applied to the charge brush, the toner adhered to the charge brush is attracted by an electric field onto the charge brush. However, when the charge voltage is not applied to the charge brush, the toner adhered to the charge brush is moved to the intermediate transfer member. When a subsequent toner image is formed on the toner adhered to the intermediate transfer member, the quality of the subsequent image is deteriorated. Accordingly, the charge voltage is applied to the charge brush when an intermediate transfer area to which the toner image is transferred onto the intermediate transfer member immediately afterward faces the charge brush.Type: ApplicationFiled: April 2, 2008Publication date: October 16, 2008Applicant: CANON KABUSHIKI KAISHAInventor: Takamitsu Soda
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Patent number: 7113713Abstract: An image forming apparatus includes a first image bearing member, a movable second image bearing member, a charging device and a voltage applying device. A toner image is transferred from the first image bearing member to the second image bearing member at a first transfer portion, and the toner image is transferred from the second image bearing member to a transfer material at a second transfer portion. The charging device is opposed to the second image bearing member at a downstream side of the second transfer portion and at an upstream side of the first transfer portion with respect to a moving direction of the second image bearing member. The voltage applying device switches a DC voltage from a first voltage to a second voltage which is opposite in polarity to the first voltage.Type: GrantFiled: August 19, 2004Date of Patent: September 26, 2006Assignee: Canon Kabushiki KaishaInventors: Takamitsu Soda, Tatsuya Kobayashi
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Patent number: 7085524Abstract: An image forming apparatus includes a plurality of movable image carriers, a movable intermediate transfer body, and a contacting member separably contacting to the intermediate transfer body at a contacting position. A position for transfer between a first image carrier and the intermediate transfer body defines a first transfer position. A position for transfer between a second image carrier and the intermediate transfer body defines a second transfer position. A toner image formed on said intermediate transfer body is again transferred onto a transfer material after passing through said first transfer position and said second transfer position. The latent image formation on the first image carrier is done at a time different from a contacting operation of the contacting member.Type: GrantFiled: November 26, 2003Date of Patent: August 1, 2006Assignee: Canon Kabushiki KaishaInventors: Takamitsu Soda, Akihiko Takeuchi, Tatsuya Kobayashi, Naoki Enomoto, Takehiko Suzuki
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Patent number: 7010254Abstract: An image forming apparatus includes an image carrying member and an intermediate transfer body in an endless shape movable and receivable of toner images from said image carrying member at first and second transfer positions. The following relationship is satisfied where a distance from the first transfer position to the second transfer position along the moving direction of the intermediate transfer body is denoted as Lab, a circumference of the intermediate transfer in the moving direction is denoted as Lr, and a length of the toner image formed on the intermediate transfer body is denoted as Lm?Lr?Lm>Lab.Type: GrantFiled: December 23, 2003Date of Patent: March 7, 2006Assignee: Canon Kabushiki KaishaInventors: Akihiko Takeuchi, Tatsuya Kobayashi, Naoki Enomoto, Takehiko Suzuki, Takamitsu Soda
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Patent number: 6912369Abstract: The invention provides an image forming apparatus including an image bearing member, an intermediate transferring member for receiving a transfer of a toner image from the image bearing member, a cleaning unit which cleans the toner image on the intermediate transferring member, a first mode for transferring a toner image on the intermediate transferring member onto a transfer material, and a second mode for cleaning the toner image without transfer to the transfer material. It is thus possible to prevent image failures resulting when the intermediate transferring member is started to be used from a new state or when the image forming apparatus is started to be used after a prolonged pause.Type: GrantFiled: September 23, 2003Date of Patent: June 28, 2005Assignee: Canon Kabushiki KaishaInventors: Seiji Saito, Tatsuya Kobayashi, Masaru Shimura, Koichi Suzuki, Takamitsu Soda
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Publication number: 20050078972Abstract: The image forming apparatus includes a first image bearing member, a movable second image bearing member, a charging device and a voltage applying device, wherein a toner image is transferred from the first image bearing member to the second image bearing member at a first transfer portion, the toner image is transferred from the second image bearing member to a transfer material at a second transfer portion, the charging device is opposed to the second image bearing member at a downstream side of the second transfer portion and at an upstream side of the first transfer portion with respect to a moving direction of the second image bearing member, the voltage applying device switches a DC voltage from a first voltage to a second voltage which is opposite in polarity to the first voltage, the switching from the first voltage to the second voltage is executed at every predetermined number of transfers of the toner image from the second image bearing member to the transfer material, and the predetermined numberType: ApplicationFiled: August 19, 2004Publication date: April 14, 2005Applicant: CANON KABUSHIKI KAISHAInventors: Takamitsu Soda, Tatsuya Kobayashi