Patents by Inventor Tetsurou Sasamoto
Tetsurou Sasamoto 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: 9550375Abstract: An inkjet image forming apparatus is provided. The inkjet image forming apparatus includes a recording unit, a selection heater, a heater, and a processor. The recording unit forms an ink image on a recording medium being conveyed. The selection heater is disposed downstream from the recording unit relative to a direction of conveyance of the recording medium, and selectively heats the ink image formed on the recording medium. The heater is disposed downstream from the selection heater relative to the direction of conveyance of the recording medium, and heats the recording medium on which the ink image has been selectively heated. The processor controls the recording unit, the selection heater, and the heater, and sets an output of the selection heater in view of an occurrence of cockling on the recording medium.Type: GrantFiled: October 8, 2015Date of Patent: January 24, 2017Assignee: Ricoh Company, Ltd.Inventors: Masafumi Yamada, Takuma Nakamura, Tetsurou Sasamoto
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Patent number: 9327524Abstract: A dryer for drying an ink image formed on a recording medium is provided. The dryer includes a selective heating dryer, a uniform heating dryer, and a controller. The selective heating dryer is disposed on an upstream side of a feeding path of the recording medium, and performs a first-time drying of the ink image under an output condition in which an amount of cockling becomes equal to or less than a given amount. The uniform heating dryer is disposed on a downstream side from the selective heating dryer on the feeding path, and performs a second-time drying of the ink image after the selective heating dryer performs the first-time drying. The controller changes the output condition of the selective heating dryer in accordance with image information of the ink image, when the ink image is formed with a conductive-particle-containing ink.Type: GrantFiled: November 13, 2015Date of Patent: May 3, 2016Assignee: Ricoh Company, Ltd.Inventors: Masafumi Yamada, Takuma Nakamura, Tetsurou Sasamoto
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Publication number: 20160114600Abstract: An inkjet image forming apparatus is provided. The inkjet image forming apparatus includes a recording unit, a selection heater, a heater, and a processor. The recording unit forms an ink image on a recording medium being conveyed. The selection heater is disposed downstream from the recording unit relative to a direction of conveyance of the recording medium, and selectively heats the ink image formed on the recording medium. The heater is disposed downstream from the selection heater relative to the direction of conveyance of the recording medium, and heats the recording medium on which the ink image has been selectively heated. The processor controls the recording unit, the selection heater, and the heater, and sets an output of the selection heater in view of an occurrence of cockling on the recording medium.Type: ApplicationFiled: October 8, 2015Publication date: April 28, 2016Inventors: Masafumi YAMADA, Takuma NAKAMURA, Tetsurou SASAMOTO
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Patent number: 8871861Abstract: A silicone compound represented by the following Chemical Structure 1: wherein Y represents a substituted or non-substituted alkyl group having one to ten carbon atoms, X1, X2, and X3 independently represent methyl groups or any of Substituents A-1 to A-7, and l, m, and n are independently zero or an integer of from 1 to 6.Type: GrantFiled: May 1, 2012Date of Patent: October 28, 2014Assignee: Ricoh Company, Ltd.Inventors: Masayuki Shoshi, Soh Noguchi, Tetsurou Sasamoto, Takeshi Hihara, Tsuneo Kurotori
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Patent number: 8494427Abstract: A disclosed fixing device applying a bubble-like fixing liquid to resin-containing particles adhered to a medium so that the resin-containing particles are fixed to the medium, the bubble-like fixing liquid being formed by transforming a fixing liquid into foam that dissolves or swells at least a part of the resin, includes a control device that, based on a difference between a moisture content included in the medium after fixing and a target value of the moisture content, adjusts an application amount of the fixing liquid for a next medium.Type: GrantFiled: April 13, 2011Date of Patent: July 23, 2013Assignee: Ricoh Company, Ltd.Inventors: Kazuya Nagao, Takuma Nakamura, Yuichi Aoyama, Masafumi Yamada, Shunichi Abe, Tetsurou Sasamoto, Takanori Inadome
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Patent number: 8472852Abstract: A fixing device includes a foam fixer generator unit generating a foam fixer containing a softener softening toner by dissolving or swelling part of resin of the toner, an application roller carrying and transferring the foam fixer onto a recording sheet, a pressure roller applying pressure to a toner image on the recording sheet via the foam fixer on the application roller to fix the toner image on the recording sheet, a cleaning device removing residual components remaining on the application roller, a recording sheet detector unit detecting presence or absence of the recording sheet, a remover unit being in contact with and separated from the application roller to remove the foam fixer on the application roller, and a control unit controlling the contact-separation operation of the remover unit based on a detected result of a front end and/or a rear end of the recording sheet.Type: GrantFiled: January 28, 2011Date of Patent: June 25, 2013Assignee: Ricoh Company, Ltd.Inventors: Yuichi Aoyama, Takuma Nakamura, Tetsurou Sasamoto, Masafumi Yamada, Shunichi Abe
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Patent number: 8428503Abstract: A disclosed fixing device for fixing resin particles softened by applying a foam fixer thereon to a recording medium includes a foam fixer generator unit to introduce air bubbles into a liquid fixer containing a softener for softening the resin particles by dissolving or swelling a part of the resin particles to generate the foam fixer, a fixer application member to be brought into contact with a facing member facing the fixer application member to form an application nip and transfer the generated foam fixer to the application nip by moving its surface while carrying the foam fixer to apply the foam fixer to a surface of the recording medium carrying the resin particles at the application nip, and a foam accumulation detector unit to detect a foam accumulation formed of the foam fixer accumulated at an entrance side of the application nip.Type: GrantFiled: February 22, 2011Date of Patent: April 23, 2013Assignee: Ricoh Company, Ltd.Inventors: Tetsurou Sasamoto, Takuma Nakamura, Masafumi Yamada, Yuichi Aoyama, Takanori Inadome, Kazuya Nagao, Shunichi Abe
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Publication number: 20120301193Abstract: A fixing device for applying a foam fixing agent to particles including resin resting on a medium to fix the particles including resin onto the medium. The foam fixing agent includes a softener for softening the particles including resin by dissolving or swelling at least part of the resin. The fixing device includes a first foam fixing agent generating unit that generates a first foam fixing agent from a fixing agent; a second foam fixing agent generating unit that generates a second foam fixing agent from the fixing agent, the second foam fixing agent having a lower density than the first foam fixing agent; and a foam application member on which a first film formed with the first foam fixing agent and a second film formed with the second foam fixing agent are formed.Type: ApplicationFiled: March 7, 2011Publication date: November 29, 2012Inventors: Takanori Inadome, Takuma Nakamura, Yuichi Aoyama, Shunichi Abe, Tetsurou Sasamoto, Masafumi Yamada, Kazuya Nagao
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Publication number: 20120283378Abstract: A silicone compound represented by the following Chemical Structure 1: wherein Y represents a substituted or non-substituted alkyl group having one to ten carbon atoms, X1, X2, and X3 independently represent methyl groups or any of the following Substituents A-1 to A-7, and l, m, and n are independently zero or an integer of from 1 to 6, wherein R1 is a hydrogen atom, an alkyl group having one to four carbon atoms, or an alkoxy group having one to four carbon atoms, wherein R2 represents a single bonding or an alkylene group having one to four carbon atoms and R3 represents a single bonding or an alkyleneoxy group having one to four carbon atoms, wherein R4 and R5 independently represent hydrogen atoms or methyl groups,Type: ApplicationFiled: May 1, 2012Publication date: November 8, 2012Applicant: RICOH COMPANY, LTD.,Inventors: Masayuki SHOSHI, Soh Noguchi, Tetsurou Sasamoto, Takeshi Hihara, Tsuneo Kurotori
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Patent number: 8170457Abstract: A disclosed cleaning device for removing adhering matter from a surface of a member subject to cleaning includes a belt-shaped film member arranged in a stretched configuration capable of being wound or endlessly move in a direction opposite to a surface movement direction of the member subject to cleaning while being in contact with the surface of the member subject to cleaning, and a cleaning blade configured to abut on the surface of the member subject to cleaning via the belt-shaped film member at a position where the belt-shaped film member is brought into contact with the member subject to cleaning.Type: GrantFiled: May 13, 2010Date of Patent: May 1, 2012Assignee: Ricoh Company, Ltd.Inventors: Yuichi Aoyama, Yasuo Katano, Yukimichi Someya, Takuma Nakamura, Tetsurou Sasamoto, Shunichi Abe, Masafumi Yamada
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Publication number: 20110275015Abstract: A disclosed fixing device applying a bubble-like fixing liquid to resin-containing particles adhered to a medium so that the resin-containing particles are fixed to the medium, the bubble-like fixing liquid being formed by transforming a fixing liquid into foam that dissolves or swells at least a part of the resin, includes a control device that, based on a difference between a moisture content included in the medium after fixing and a target value of the moisture content, adjusts an application amount of the fixing liquid for a next medium.Type: ApplicationFiled: April 13, 2011Publication date: November 10, 2011Inventors: Kazuya NAGAO, Takuma Nakamura, Yuichi Aoyama, Masafumi Yamada, Shunichi Abe, Tetsurou Sasamoto, Takanori Inadome
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Publication number: 20110222924Abstract: A fixing device includes a foam fixer generator unit generating a foam fixer containing a softener softening toner by dissolving or swelling part of resin of the toner, an application roller carrying and transferring the foam fixer onto a recording sheet, a pressure roller applying pressure to a toner image on the recording sheet via the foam fixer on the application roller to fix the toner image on the recording sheet, a cleaning device removing residual components remaining on the application roller, a recording sheet detector unit detecting presence or absence of the recording sheet, a remover unit being in contact with and separated from the application roller to remove the foam fixer on the application roller, and a control unit controlling the contact-separation operation of the remover unit based on a detected result of a front end and/or a rear end of the recording sheet.Type: ApplicationFiled: January 28, 2011Publication date: September 15, 2011Applicant: Ricoh Company, Ltd.Inventors: Yuichi Aoyama, Takuma Nakamura, Tetsurou Sasamoto, Masafumi Yamada, Shunichi Abe
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Publication number: 20110217099Abstract: A disclosed fixing device for fixing resin particles softened by applying a foam fixer thereon to a recording medium includes a foam fixer generator unit to introduce air bubbles into a liquid fixer containing a softener for softening the resin particles by dissolving or swelling a part of the resin particles to generate the foam fixer, a fixer application member to be brought into contact with a facing member facing the fixer application member to form an application nip and transfer the generated foam fixer to the application nip by moving its surface while carrying the foam fixer to apply the foam fixer to a surface of the recording medium carrying the resin particles at the application nip, and a foam accumulation detector unit to detect a foam accumulation formed of the foam fixer accumulated at an entrance side of the application nip.Type: ApplicationFiled: February 22, 2011Publication date: September 8, 2011Applicant: Ricoh Company, Ltd.Inventors: Tetsurou Sasamoto, Takuma Nakamura, Masafumi Yamada, Yuichi Aoyama, Takanori Inadome, Kazuya Nagao, Shunichi Abe
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Publication number: 20110008081Abstract: A disclosed cleaning device for removing adhering matter from a surface of a member subject to cleaning includes a belt-shaped film member arranged in a stretched configuration capable of being wound or endlessly move in a direction opposite to a surface movement direction of the member subject to cleaning while being in contact with the surface of the member subject to cleaning, and a cleaning blade configured to abut on the surface of the member subject to cleaning via the belt-shaped film member at a position where the belt-shaped film member is brought into contact with the member subject to cleaning.Type: ApplicationFiled: May 13, 2010Publication date: January 13, 2011Inventors: Yuichi AOYAMA, Yasuo Katano, Yukimichi Someya, Takuma Nakamura, Tetsurou Sasamoto, Shunichi Abe, Masafumi Yamada
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Patent number: 7054585Abstract: An image forming apparatus suppresses several kinds of inconveniences caused by unnecessary contact of a belt-formed member with opposing members and drives the belt-formed member accurately even when the belt-formed member separated from a part of a plurality of opposing members. In an image forming apparatus having a belt-formed member supported by a plurality of supporting rollers and a plurality of opposing members located side by side in a line to oppose and contact the belt-formed member, a pivot mechanism is employed to temporarily separate the belt-formed member from a part of the opposing members for color image formation. The image forming apparatus also includes a tension roller dive mechanism to increase a relative distance between the tension roller and other supporting rollers to suppress a decrease in a tension of the belt-formed member during the above-described separation of the belt-formed member from the plurality of opposing members.Type: GrantFiled: July 6, 2005Date of Patent: May 30, 2006Assignee: Ricoh Company, Ltd.Inventors: Tetsurou Sasamoto, Katsuaki Miyawaki, Makoto Obu, Minoru Suzuki, Yuichi Aoyama
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Publication number: 20050244197Abstract: An image forming apparatus suppresses several kinds of inconveniences caused by unnecessary contact of a belt-formed member with opposing members and drives the belt-formed member accurately even when the belt-formed member separated from a part of a plurality of opposing members. In an image forming apparatus having a belt-formed member supported by a plurality of supporting rollers and a plurality of opposing members located side by side in a line to oppose and contact the belt-formed member, a pivot mechanism is employed to temporarily separate the belt-formed member from a part of the opposing members for color image formation. The image forming apparatus also includes a tension roller dive mechanism to increase a relative distance between the tension roller and other supporting rollers to suppress a decrease in a tension of the belt-formed member during the above-described separation of the belt-formed member from the plurality of opposing members.Type: ApplicationFiled: July 6, 2005Publication date: November 3, 2005Inventors: Tetsurou Sasamoto, Katsuaki Miyawaki, Makoto Obu, Minoru Suzuki, Yuichi Aoyama
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Patent number: 6941102Abstract: An image forming apparatus suppresses several kinds of inconveniences caused by unnecessary contact of a belt-formed member with opposing members and drives the belt-formed member accurately even when the belt-formed member separated from a part of a plurality of opposing members. In an image forming apparatus having a belt-formed member supported by a plurality of supporting rollers and a plurality of opposing members located side by side in a line to oppose and contact the belt-formed member, a pivot mechanism is employed to temporarily separate the belt-formed member from a part of the opposing members for color image formation. The image forming apparatus also includes a tension roller dive mechanism to increase a relative distance between the tension roller and other supporting rollers to suppress a decrease in a tension of the belt-formed member during the above-described separation of the belt-formed member from the plurality of opposing members.Type: GrantFiled: May 21, 2004Date of Patent: September 6, 2005Assignee: Ricoh Company, Ltd.Inventors: Tetsurou Sasamoto, Katsuaki Miyawaki, Makoto Obu, Minoru Suzuki, Yuichi Aoyama
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Publication number: 20040213605Abstract: An image forming apparatus suppresses several kinds of inconveniences caused by unnecessary contact of a belt-formed member with opposing members and drives the belt-formed member accurately even when the belt-formed member separated from a part of a plurality of opposing members. In an image forming apparatus having a belt-formed member supported by a plurality of supporting rollers and a plurality of opposing members located side by side in a line to oppose and contact the belt-formed member, a pivot mechanism is employed to temporarily separate the belt-formed member from a part of the opposing members for color image formation. The image forming apparatus also includes a tension roller dive mechanism to increase a relative distance between the tension roller and other supporting rollers to suppress a decrease in a tension of the belt-formed member during the above-described separation of the belt-formed member from the plurality of opposing members.Type: ApplicationFiled: May 21, 2004Publication date: October 28, 2004Inventors: Tetsurou Sasamoto, Katsuaki Miyawaki, Makoto Obu, Minoru Suzuki, Yuichi Aoyama
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Patent number: 6768891Abstract: An image forming apparatus suppresses several kinds of inconveniences caused by unnecessary contact of a belt-formed member with opposing members and drives the belt-formed member accurately even when the belt-formed member separated from a part of a plurality of opposing members. In an image forming apparatus having a belt-formed member supported by a plurality of supporting rollers and a plurality of opposing members located side by side in a line to oppose and contact the belt-formed member, a pivot mechanism is employed to temporarily separate the belt-formed member from a part of the opposing members for color image formation. The image forming apparatus also includes a tension roller dive mechanism to increase a relative distance between the tension roller and other supporting rollers to suppress a decrease in a tension of the belt-formed member during the above-described separation of the belt-formed member from the plurality of opposing members.Type: GrantFiled: March 26, 2003Date of Patent: July 27, 2004Assignee: Ricoh Company, Ltd.Inventors: Tetsurou Sasamoto, Katsuaki Miyawaki, Makoto Obu, Minoru Suzuki, Yuichi Aoyama
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Publication number: 20030185602Abstract: An image forming apparatus suppresses several kinds of inconveniences caused by unnecessary contact of a belt-formed member with opposing members and drives the belt-formed member accurately even when the belt-formed member separated from a part of a plurality of opposing members. In an image forming apparatus having a belt-formed member supported by a plurality of supporting rollers and a plurality of opposing members located side by side in a line to oppose and contact the belt-formed member, a pivot mechanism is employed to temporarily separate the belt-formed member from a part of the opposing members for color image formation. The image forming apparatus also includes a tension roller dive mechanism to increase a relative distance between the tension roller and other supporting rollers to suppress a decrease in a tension of the belt-formed member during the above-described separation of the belt-formed member from the plurality of opposing members.Type: ApplicationFiled: March 26, 2003Publication date: October 2, 2003Inventors: Tetsurou Sasamoto, Katsuaki Miyawaki, Makoto Obu, Minoru Suzuki, Yuichi Aoyama