Patents by Inventor Shiro Sakata
Shiro Sakata 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: 11414220Abstract: Inner panels including at least one built-in heat pipe connected in a circumferential direction are provided. In a heat pipe panel including the built-in heat pipe, apparatuses are mounted on the outer side of the plural inner panels connected in the circumferential direction to diffuse generated heat of the apparatuses to the circumferential direction of the inner panels. Webbed panels including a built-in heat pipe horizontally arranged and having heat radiation surfaces are radially arranged at corners of the inner panels as well as a heat pipe is horizontally built in and heat radiation surfaces are arranged also on outer panels facing the inner panels to thermally connect the heat pipes to one another.Type: GrantFiled: February 1, 2017Date of Patent: August 16, 2022Assignee: Mitsubishi Electric CorporationInventors: Hiroki Izu, Yuichi Ogura, Takehide Nomura, Kengo Hayashi, Shintaro Yamashita, Shiro Sakata, Tetsuya Kitagawa
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Publication number: 20190071193Abstract: Inner panels including at least one built-in heat pipe connected in a circumferential direction are provided. In a heat pipe panel including the built-in heat pipe, apparatuses are mounted on the outer side of the plural inner panels connected in the circumferential direction to diffuse generated heat of the apparatuses to the circumferential direction of the inner panels. Webbed panels including a built-in heat pipe horizontally arranged and having heat radiation surfaces are radially arranged at corners of the inner panels as well as a heat pipe is horizontally built in and heat radiation surfaces are arranged also on outer panels facing the inner panels to thermally connect the heat pipes to one another.Type: ApplicationFiled: February 1, 2017Publication date: March 7, 2019Applicant: Mitsubishi Electric CorporationInventors: Hiroki IZU, Yuichi OGURA, Takehide NOMURA, Kengo HAYASHI, Shintaro YAMASHITA, Shiro SAKATA, Testsuya KITAGAWA
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Patent number: 8983317Abstract: An image forming apparatus configured to, in a state where a voltage is applied to a charging unit, determine a surface potential of an image bearing member using a first voltage applied when a current value obtained by, after applying a predetermined voltage to a transfer unit, detecting the current value while changing the applied voltage to a positive direction reaches a discharge current value, and a second voltage applied to the transfer unit when a current value obtained by, after applying the predetermined voltage to the transfer unit, detecting the current value while changing the applied voltage to a negative direction reaches the discharge current value.Type: GrantFiled: December 11, 2012Date of Patent: March 17, 2015Assignee: Canon Kabushiki KaishaInventor: Shiro Sakata
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Patent number: 8948630Abstract: An image forming apparatus configured to, in a state where a voltage is applied to a charging unit, determine a surface potential of an image bearing member using a first voltage applied when a current value obtained by, after applying a predetermined voltage to a transfer unit, detecting the current value while changing the applied voltage to a positive direction reaches a discharge current value, and a second voltage applied to the transfer unit when a current value obtained by, after applying the predetermined voltage to the transfer unit, detecting the current value while changing the applied voltage to a negative direction reaches the discharge current value.Type: GrantFiled: December 11, 2012Date of Patent: February 3, 2015Assignee: Canon Kabushiki KaishaInventor: Shiro Sakata
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Patent number: 8718505Abstract: The high-voltage output apparatus includes a voltage application part that applies a DC voltage to the charge member; a current detection part that detects a value of a current flowing in the image bearing member when the DC voltage is applied to the charge member; and a control part that calculates a plurality of discharge start voltages for the image bearing member, based on a plurality of current values detected by the current detection part as a result of the voltage application part applying a plurality of different DC voltages to the charge member, and controls the DC voltage applied to the charge member, using the plurality of calculated discharge start voltages. Consequently, a high-quality image can be formed by maintaining a potential on a photosensitive drum to be constant irrespective of the states of the circumstances and/or the drum layer thickness.Type: GrantFiled: August 28, 2013Date of Patent: May 6, 2014Assignee: Canon Kabushiki KaishaInventors: Shiro Sakata, Yusuke Saito, Mitsunari Ito
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Publication number: 20130343776Abstract: The high-voltage output apparatus includes a voltage application part that applies a DC voltage to the charge member; a current detection part that detects a value of a current flowing in the image bearing member when the DC voltage is applied to the charge member; and a control part that calculates a plurality of discharge start voltages for the image bearing member, based on a plurality of current values detected by the current detection part as a result of the voltage application part applying a plurality of different DC voltages to the charge member, and controls the DC voltage applied to the charge member, using the plurality of calculated discharge start voltages. Consequently, a high-quality image can be formed by maintaining a potential on a photosensitive drum to be constant irrespective of the states of the circumstances and/or the drum layer thickness.Type: ApplicationFiled: August 28, 2013Publication date: December 26, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Shiro Sakata, Yusuke Saito, Mitsunari Ito
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Patent number: 8554096Abstract: A power source includes a charging voltage generation unit configured to generate a charging voltage to charge an image bearing member, a developing voltage generation unit configured to generate a developing voltage to develop an electrostatic latent image formed on the image bearing member, a control unit configured to control an output from the developing voltage generation unit, and a correction unit configured to correct an operation of the control unit based on an output from the charging voltage generation unit.Type: GrantFiled: March 24, 2010Date of Patent: October 8, 2013Assignee: Canon Kabushiki KaishaInventor: Shiro Sakata
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Patent number: 8548348Abstract: The high-voltage output apparatus includes a voltage application part that applies a DC voltage to the charge member; a current detection part that detects a value of a current flowing in the image bearing member when the DC voltage is applied to the charge member; and a control part that calculates a plurality of discharge start voltages for the image bearing member, based on a plurality of current values detected by the current detection part as a result of the voltage application part applying a plurality of different DC voltages to the charge member, and controls the DC voltage applied to the charge member, using the plurality of calculated discharge start voltages. Consequently, a high-quality image can be formed by maintaining a potential on a photosensitive drum to be constant irrespective of the states of the circumstances and/or the drum layer thickness.Type: GrantFiled: March 2, 2011Date of Patent: October 1, 2013Assignee: Canon Kabushiki KaishaInventors: Shiro Sakata, Yusuke Saito, Mitsunari Ito
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Patent number: 8543021Abstract: The image forming apparatus calculates a surface voltage of an image bearing member based on a first charge start voltage, which is obtained when a first voltage application section applies a first DC voltage to a charge section, and a second charge start voltage, which is obtained when a second voltage application section applies a second DC voltage to the charge section. This allows a high-quality image to be formed irrespective of a change in circumstance or drum layer thickness.Type: GrantFiled: June 27, 2011Date of Patent: September 24, 2013Assignee: Canon Kabushiki KaishaInventors: Shiro Sakata, Yusuke Saito, Mitsunari Ito
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Patent number: 8346114Abstract: A power source includes a voltage setting unit configured to set an output voltage, a voltage generation unit configured to output the set voltage to a load, a feedback unit configured to detect the output voltage and feed back the detected voltage to the voltage setting unit, a current detection unit configured to detect a current value which is a sum of a current value flowing in the feedback unit and a current value flowing in the load when the set voltage is output to the load, and a control unit configured to switch between a constant current control which controls the set voltage so that the detected current value becomes a constant current, and a constant voltage control which controls the set voltage so that the voltage output to the load becomes a constant voltage based on the voltage value that is fed back by the feedback unit.Type: GrantFiled: August 6, 2008Date of Patent: January 1, 2013Assignee: Canon Kabushiki KaishaInventor: Shiro Sakata
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Publication number: 20120014309Abstract: A WMMR (301) is used as a wireless relay node in a wireless network connected to a backbone network including a multicast data packet distribution source. A route control unit (N03) establishes a multicast data packet transfer route based on unicast routes by making reference to an SWGT (20) based on received route control information and adding an entry to a multicast routing table (MRT) (10). A transfer control unit (N04) makes reference to the MRT (10) and makes a transfer to a directly connected transfer destination along the established multicast data packet transfer route by unicasting capable arrival confirmation and retransmission control as a transmission scheme in the data link layer.Type: ApplicationFiled: March 15, 2010Publication date: January 19, 2012Inventors: Hiroyuki Iizuka, Yuichiro Ezure, Yoshiaki Takakura, Tetsuya Ito, Yuki Kumagai, Yasuhiro ` Goto, Shiro Sakata
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Publication number: 20120002989Abstract: The image forming apparatus calculates a surface voltage of an image bearing member based on a first charge start voltage, which is obtained when a first voltage application section applies a first DC voltage to a charge section, and a second charge start voltage, which is obtained when a second voltage application section applies a second DC voltage to the charge section. This allows a high-quality image to be formed irrespective of a change in circumstance or drum layer thickness.Type: ApplicationFiled: June 27, 2011Publication date: January 5, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Shiro Sakata, Yusuke Saito, Mitsunari Ito
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Publication number: 20110217064Abstract: The high-voltage output apparatus includes a voltage application part that applies a DC voltage to the charge member; a current detection part that detects a value of a current flowing in the image bearing member when the DC voltage is applied to the charge member; and a control part that calculates a plurality of discharge start voltages for the image bearing member, based on a plurality of current values detected by the current detection part as a result of the voltage application part applying a plurality of different DC voltages to the charge member, and controls the DC voltage applied to the charge member, using the plurality of calculated discharge start voltages. Consequently, a high-quality image can be formed by maintaining a potential on a photosensitive drum to be constant irrespective of the states of the circumstances and/or the drum layer thickness.Type: ApplicationFiled: March 2, 2011Publication date: September 8, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Shiro Sakata, Yusuke Saito, Mitsunari Ito
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Publication number: 20100247128Abstract: A power source includes a charging voltage generation unit configured to generate a charging voltage to charge an image bearing member, a developing voltage generation unit configured to generate a developing voltage to develop an electrostatic latent image formed on the image bearing member, a control unit configured to control an output from the developing voltage generation unit, and a correction unit configured to correct an operation of the control unit based on an output from the charging voltage generation unit.Type: ApplicationFiled: March 24, 2010Publication date: September 30, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Shiro Sakata
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Patent number: 7711278Abstract: In an image forming apparatus in which a DC bias is applied to charge a photosensitive drum, when a charge eliminating device is in deterioration or failure, there are some cases where a proper charging is not made, and thus poor imaging occurs. A DC bias is applied to a charging member in the charge eliminating operation area of an image bearing member where the charge eliminating device makes charge eliminating operation; and based on the values of an electric current passing through the image bearing member on that occasion, a DC bias application is switched between by constant-current-control and by constant-voltage-control.Type: GrantFiled: March 7, 2007Date of Patent: May 4, 2010Assignee: Canon Kabushiki KaishaInventor: Shiro Sakata
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Publication number: 20100092192Abstract: In an image forming apparatus in which a DC bias is applied to charge a photosensitive drum, when a charge eliminating device is in deterioration or failure, there are some cases where a proper charging is not made, and thus poor imaging occurs. A DC bias is applied to a charging member in the charge eliminating operation area of an image bearing member where the charge eliminating device makes charge eliminating operation; and based on the values of an electric current passing through the image bearing member on that occasion, a DC bias application is switched between by constant-current-control and by constant-voltage-control.Type: ApplicationFiled: December 15, 2009Publication date: April 15, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Shiro SAKATA
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Publication number: 20090052932Abstract: A power source includes a voltage setting unit configured to set an output voltage, a voltage generation unit configured to output the set voltage to a load, a feedback unit configured to detect the output voltage and feed back the detected voltage to the voltage setting unit, a current detection unit configured to detect a current value which is a sum of a current value flowing in the feedback unit and a current value flowing in the load when the set voltage is output to the load, and a control unit configured to switch between a constant current control which controls the set voltage so that the detected current value becomes a constant current, and a constant voltage control which controls the set voltage so that the voltage output to the load becomes a constant voltage based on the voltage value that is fed back by the feedback unit.Type: ApplicationFiled: August 6, 2008Publication date: February 26, 2009Applicant: CANON KABUSHIKI KAISHAInventor: Shiro Sakata
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Publication number: 20070212087Abstract: In an image forming apparatus in which a DC bias is applied to charge a photosensitive drum, when a charge eliminating device is in deterioration or failure, there are some cases where a proper charging is not made, and thus poor imaging occurs. A DC bias is applied to a charging member in the charge eliminating operation area of an image bearing member where the charge eliminating device makes charge eliminating operation; and based on the values of an electric current passing through the image bearing member on that occasion, a DC bias application is switched between by constant-current-control and by constant-voltage-control.Type: ApplicationFiled: March 7, 2007Publication date: September 13, 2007Applicant: CANON KABUSHIKI KAISHAInventor: Shiro SAKATA
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Patent number: 5586140Abstract: A plasma melting furnace has a melting chamber having an anode torch and a cathode torch made of graphite and having a electric conductor disposed on the bottom thereof. When the furnace is operated, the anode torch, having an inflow of electrons, which forms an unstable plasma arc is contacted with the electric conductor and is not used, while the cathode torch, having an outflow of electrons, which forms a stable plasma arc, is utilized for heating, whereby the furnace can be stably and continuously operated. Thus, since the cathode torch which is used is not heated so much and the anode torch, which is liable to be heated to a great degree, is not used, the electrode consumption rate can be greatly reduced.Type: GrantFiled: August 3, 1995Date of Patent: December 17, 1996Assignee: Hitachi Zosen CorporationInventors: Michio Ishida, Tsutomu Kuwahara, Hideo Sato, Yoshitoshi Sekiguchi, Kunio Sasaki, Shiro Sakata, Hiroshi Kosaka, Toshio Hirai