Patents by Inventor Yohichiro Miyaguchi
Yohichiro Miyaguchi 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: 7200352Abstract: A developing device including a latent image supporter. Powder is adhered on the latent image supporter to develop a latent image on the latent image supporter and a transporting member is arranged opposite to the latent image supporter. A plurality of electrodes are formed in the transporting member for generating a traveling-wave electric field to move the powder, and n-phase voltages are applied to the electrodes of the transporting member to form an electric field in a first direction so that the powder moves towards the latent image supporter at an image portion of the latent image and in a second direction so that the powder moves in a direction opposite to the latent image supporter at a non-image portion of the latent image.Type: GrantFiled: January 25, 2006Date of Patent: April 3, 2007Assignee: Ricoh Company, Ltd.Inventors: Katsuo Sakai, Masanori Horike, Yohichiro Miyaguchi, Nobuaki Kondoh
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Patent number: 7123864Abstract: A toner supply device for preventing adverse influence caused by a charging failure of toner without scattering toner and generating ozone due to corona discharge and realizing low potential development according to an ETH phenomenon. The toner supply device is provided with the specific electrostatic toner transport substrate on which a plurality electrodes are disposed.Type: GrantFiled: March 22, 2004Date of Patent: October 17, 2006Assignee: Ricoh Company, Ltd.Inventors: Yohichiro Miyaguchi, Masanori Horike, Nobuaki Kondoh, Katsuo Sakai
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Patent number: 7062204Abstract: A classifier having a simple constitution for classifying powder with a high accuracy is provided. The classifier is provided with a transfer board having a plurality of electrodes for generating electric fields for transferring and hopping the powder by an electrostatic force. The classifier is further provided with an opposite roller generating an electric field for transporting and attaching the powder (toner) transferred and hopped on the transfer board to the opposite roller, which is opposite to the transfer board.Type: GrantFiled: March 11, 2005Date of Patent: June 13, 2006Assignee: Ricoh Company, Ltd.Inventors: Yohichiro Miyaguchi, Masanori Horike, Takeshi Takemoto, Yutaka Ebi, Toshiroh Higuchi
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Publication number: 20060120765Abstract: A developing device including a latent image supporter. Powder is adhered on the latent image supporter to develop a latent image on the latent image supporter and a transporting member is arranged opposite to the latent image supporter. A plurality of electrodes are formed in the transporting member for generating a traveling-wave electric field to move the powder, and n-phase voltages are applied to the electrodes of the transporting member to form an electric field in a first direction so that the powder moves towards the latent image supporter at an image portion of the latent image and in a second direction so that the powder moves in a direction opposite to the latent image supporter at a non-image portion of the latent image.Type: ApplicationFiled: January 25, 2006Publication date: June 8, 2006Inventors: Katsuo Sakai, Masanori Horike, Yohichiro Miyaguchi, Nobuaki Kondoh
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Patent number: 7024142Abstract: A developing device including a latent image supporter. Powder is adhered on the latent image supporter to develop a latent image on the latent image supporter and a transporting member is arranged opposite to the latent image supporter. A plurality of electrodes are formed in the transporting member for generating a traveling-wave electric field to move the powder, and n-phase voltages are applied to the electrodes of the transporting member to form an electric field in a first direction so that the powder moves towards the latent image supporter at an image portion of the latent image and in a second direction so that the powder moves in a direction opposite to the latent image supporter at a non-image portion of the latent image.Type: GrantFiled: March 31, 2005Date of Patent: April 4, 2006Assignee: Ricoh Company, Ltd.Inventors: Katsuo Sakai, Masanori Horike, Yohichiro Miyaguchi, Nobuaki Kondoh
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Patent number: 6947691Abstract: An electrostatic transportation device is provided with a transporting base plate having a plurality of electrodes which generate an electric field which performs transporting and hopping of fine particles by an electrostatic force, wherein a width of each of the electrodes in a travelling direction of the fine particles is set to be in a range of 1 time to 20 times an average particle diameter of the fine particles, a pitch between the electrodes in the travelling direction of the fine particles is set to be in a range of 1 time to 20 times the average particle diameter of the fine particles, and driving waveforms of n phases or more (n is an integer of 3 or more) are applied to respective electrodes.Type: GrantFiled: January 6, 2004Date of Patent: September 20, 2005Assignee: Ricoh Company, Ltd.Inventors: Yohichiro Miyaguchi, Nobuaki Kondoh, Takeshi Takemoto, Katsuo Sakai, Masanori Horike
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Patent number: 6941098Abstract: A classifier having a simple constitution for classifying powder with a high accuracy is provided. The classifier is provided with a transfer board having a plurality of electrodes for generating electric fields for transferring and hopping the powder by an electrostatic force. The classifier is further provided with an opposite roller generating an electric field for transporting and attaching the powder (toner) transferred and hopped on the transfer board to the opposite roller, which is opposite to the transfer board.Type: GrantFiled: March 12, 2003Date of Patent: September 6, 2005Assignee: Ricoh Company, LTDInventors: Yohichiro Miyaguchi, Masanori Horike, Takeshi Takemoto, Yutaka Ebi, Toshiroh Higuchi
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Publication number: 20050175377Abstract: A developing device is provided. The developing device comprises a latent image supporter, wherein powder is adhered on the latent image supporter to develop a latent image on the latent image supporter; a transporting member arranged opposite to the latent image supporter; and a plurality of electrodes formed in the transporting member for generating a traveling-wave electric field to move the powder, wherein n-phase voltages are applied to the electrodes of the transporting member to form an electric field in a first direction so that the powder moves towards the latent image supporter at an image portion of the latent image and in a second direction so that the powder moves in a direction opposite to the latent image supporter at a non-image portion of the latent image.Type: ApplicationFiled: March 31, 2005Publication date: August 11, 2005Inventors: Katsuo Sakai, Masanori Horike, Yohichiro Miyaguchi, Nobuaki Kondoh
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Publication number: 20050152717Abstract: A classifier having a simple constitution for classifying powder with a high accuracy is provided. The classifier is provided with a transfer board having a plurality of electrodes for generating electric fields for transferring and hopping the powder by an electrostatic force. The classifier is further provided with an opposite roller generating an electric field for transporting and attaching the powder (toner) transferred and hopped on the transfer board to the opposite roller, which is opposite to the transfer board.Type: ApplicationFiled: March 11, 2005Publication date: July 14, 2005Inventors: Yohichiro Miyaguchi, Masanori Horike, Takeshi Takemoto, Yutaka Ebi, Toshiroh Higuchi
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Patent number: 6901231Abstract: A developing device including a latent image supporter. Powder is adhered on the latent image supporter to develop a latent image on the latent image supporter and a transporting member is arranged opposite to the latent image supporter. A plurality of electrodes are formed in the transporting member for generating a traveling-wave electric field to move the powder, and n-phase voltages are applied to the electrodes of the transporting member to form an electric field in a first direction so that the powder moves towards the latent image supporter at an image portion of the latent image and in a second direction so that the powder moves in a direction opposite to the latent image supporter at a non-image portion of the latent image.Type: GrantFiled: March 24, 2003Date of Patent: May 31, 2005Assignee: Ricoh Company, Ltd.Inventors: Katsuo Sakai, Masanori Horike, Yohichiro Miyaguchi, Nobuaki Kondoh
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Publication number: 20040240907Abstract: A toner supply device for preventing adverse influence caused by a charging failure of toner without scattering toner and generating ozone due to corona discharge and realizing low potential development according to an ETH phenomenon. The toner supply device is provided with the specific electrostatic toner transport substrate on which a plurality electrodes are disposed.Type: ApplicationFiled: March 22, 2004Publication date: December 2, 2004Inventors: Yohichiro Miyaguchi, Masanori Horike, Nobuaki Kondoh, Katsuo Sakai
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Publication number: 20040156655Abstract: An electrostatic transportation device is provided with a transporting base plate having a plurality of electrodes which generate an electric field which performs transporting and hopping of fine particles by an electrostatic force, wherein a width of each of the electrodes in a travelling direction of the fine particles is set to be in a range of 1 time to 20 times an average particle diameter of the fine particles, a pitch between the electrodes in the travelling direction of the fine particles is set to be in a range of 1 time to 20 times the average particle diameter of the fine particles, and driving waveforms of n phases or more (n is an integer of 3 or more) are applied to respective electrodes.Type: ApplicationFiled: January 6, 2004Publication date: August 12, 2004Inventors: Yohichiro Miyaguchi, Nobuaki Kondoh, Takeshi Takemoto, Katsuo Sakai, Masanori Horike
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Patent number: 6708014Abstract: An electrostatic transportation device is provided with a transporting base plate having a plurality of electrodes which generate an electric field which performs transporting and hopping of fine particles by an electrostatic force, wherein a width of each of the electrodes in a travelling direction of the fine particles is set to be in a range of 1 time to 20 times an average particle diameter of the fine particles, a pitch between the electrodes in the travelling direction of the fine particles is set to be in a range of 1 time to 20 times the average particle diameter of the fine particles, and driving waveforms of n phases or more (n is an integer of 3 or more) are applied to respective electrodes.Type: GrantFiled: March 15, 2002Date of Patent: March 16, 2004Assignee: Ricoh Company, Ltd.Inventors: Yohichiro Miyaguchi, Nobuaki Kondoh, Takeshi Takemoto, Katsuo Sakai, Masanori Horike
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Publication number: 20030210928Abstract: A classifier having a simple constitution for classifying powder with a high accuracy is provided. The classifier is provided with a transfer board having a plurality of electrodes for generating electric fields for transferring and hopping the powder by an electrostatic force. The classifier is further provided with an opposite roller generating an electric field for transporting and attaching the powder (toner) transferred and hopped on the transfer board to the opposite roller, which is opposite to the transfer board.Type: ApplicationFiled: March 12, 2003Publication date: November 13, 2003Inventors: Yohichiro Miyaguchi, Masanori Horike, Takeshi Takemoto, Yutaka Ebi, Toshiroh Higuchi
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Publication number: 20030128243Abstract: A tree-structured diagram output method outputs a tree-structured diagram representing association of objects. In the method, an identifier which is specific to each of the objects is assigned to every object. A first object is selected from among the objects. An identifier of the selected first object is stored into a first storage portion. A second object, different from the first object, is selected from among the objects. An identifier of the selected second object is stored into a second storage portion. The identifier of the first storage portion is associated with the identifier of the second storage portion so that the association of the identifiers of the first and second objects is obtained. A tree-structured diagram representing the association of the first and second objects is outputted based on the association of the identifiers obtained in the associating step.Type: ApplicationFiled: August 21, 2002Publication date: July 10, 2003Inventors: Hiroyuki Okamoto, Yohichiro Miyaguchi, Yasushi Nakazato
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Publication number: 20020131795Abstract: An electrostatic transportation device is provided with a transporting base plate having a plurality of electrodes which generate an electric field which performs transporting and hopping of fine particles by an electrostatic force, wherein a width of each of the electrodes in a travelling direction of the fine particles is set to be in a range of 1 time to 20 times an average particle diameter of the fine particles, a pitch between the electrodes in the travelling direction of the fine particles is set to be in a range of 1 time to 20 times the average particle diameter of the fine particles, and driving waveforms of n phases or more (n is an integer of 3 or more) are applied to respective electrodes.Type: ApplicationFiled: March 15, 2002Publication date: September 19, 2002Inventors: Yohichiro Miyaguchi, Nobuaki Kondoh, Takeshi Takemoto, Katsuo Sakai, Masanori Horike
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Patent number: 6367914Abstract: An electrostatic ink-jet head includes an oscillation plate which defines a bottom of a pressurizing chamber. An electrode substrate is bonded to the oscillation plate and includes a recessed portion that defines an internal space between the oscillation plate and the electrode substrate. A curved electrode is arranged on the recessed portion so as to face the oscillation plate via the internal space. When a driving voltage is applied to the electrode, the electrode actuates the oscillation plate via an electrostatic force, so as to pressurize ink in the pressurizing chamber, thereby ejecting an ink drop onto the recording paper.Type: GrantFiled: April 14, 2000Date of Patent: April 9, 2002Assignee: Ricoh Company, Ltd.Inventors: Kouichi Ohtaka, Eiichi Ohta, Mitsugu Irinoda, Yohichiro Miyaguchi, Takeshi Takemoto, Kenichiro Hashimoto, Makoto Tanaka, Yutaka Ebi