Patents by Inventor Ryouta Matsufuji
Ryouta Matsufuji 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: 8777346Abstract: An ink-jet printing method includes the steps of dividing multiple ink droplet discharging pulses into two or more groups in an ink droplet discharging order, providing the multiple ink droplet discharging pulses to a pressure generator per scan line time, and discharging ink droplets from an ink droplet discharge head in accordance with the multiple ink droplet discharging pulses. The method further includes the steps of combining ink droplets of a former group as a first combined ink droplet, combining ink droplets of a latter group as a second combination droplet, combining the second combined ink droplet of the latter group with that of former group before the ink droplets reach a target, and maintaining a prescribed amount of ink droplets landing on the target by decreasing the number of ink droplet discharging pulses.Type: GrantFiled: August 13, 2012Date of Patent: July 15, 2014Assignee: Ricoh Company, Ltd.Inventors: Takashi Satou, Tomohiko Koda, Ryouta Matsufuji
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Publication number: 20130038651Abstract: An ink-jet printing method includes the steps of dividing multiple ink droplet discharging pulses into two or more groups in an ink droplet discharging order, providing the multiple ink droplet discharging pulses to a pressure generator per scan line time, and discharging ink droplets from an ink droplet discharge head in accordance with the multiple ink droplet discharging pulses. The method further includes the steps of combining ink droplets of a former group as a first combined ink droplet, combining ink droplets of a latter group as a second combination droplet, combining the second combined ink droplet of the latter group with that of former group before the ink droplets reach a target, and maintaining a prescribed amount of ink droplets landing on the target by decreasing the number of ink droplet discharging pulses.Type: ApplicationFiled: August 13, 2012Publication date: February 14, 2013Applicant: RICOH COMPANY, LTD.Inventors: Takashi SATOU, Tomohiko KODA, Ryouta MATSUFUJI
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Patent number: 8348407Abstract: A liquid ejection head includes nozzles, separate chambers, a common chamber, inlet portions, a filter unit, and ribs. Droplets of liquid are ejected from the nozzles. The separate chambers are communicated with the nozzles. The inlet portions are communicated with the corresponding separate chambers. Liquid is supplied from the common chamber to the separate chambers through the inlet portions. The filter unit is disposed between the inlet portions and the common chamber to filter liquid in an area across the separate chambers in a first direction in which the nozzles are arrayed. The ribs are disposed in the filter unit at intervals corresponding in size to at least two of the separate chambers in the first direction to partition the filter unit. The inlet portions are communicated in the first direction with each other in at least one portion of each of the inlet portions facing the filter unit.Type: GrantFiled: June 24, 2010Date of Patent: January 8, 2013Assignee: Ricoh Company, Ltd.Inventors: Ryouta Matsufuji, Hideyuki Makita, Tadashi Mimura, Satoru Tobita, Tomohiko Koda
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Publication number: 20100328409Abstract: A liquid ejection head includes nozzles, separate chambers, a common chamber, inlet portions, a filter unit, and ribs. Droplets of liquid are ejected from the nozzles. The separate chambers are communicated with the nozzles. The inlet portions are communicated with the corresponding separate chambers. Liquid is supplied from the common chamber to the separate chambers through the inlet portions. The filter unit is disposed between the inlet portions and the common chamber to filter liquid in an area across the separate chambers in a first direction in which the nozzles are arrayed. The ribs are disposed in the filter unit at intervals corresponding in size to at least two of the separate chambers in the first direction to partition the filter unit. The inlet portions are communicated in the first direction with each other in at least one portion of each of the inlet portions facing the filter unit.Type: ApplicationFiled: June 24, 2010Publication date: December 30, 2010Applicant: RICOH COMPANY, LTD.Inventors: Ryouta MATSUFUJI, Hideyuki Makita, Tadashi Mimura, Satoru Tobita, Tomohiko Koda
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Patent number: 7681987Abstract: An inkjet recording head includes a nozzle plate, chamber plate, and a diaphragm plate. The nozzle plate includes a plurality of nozzles for ejecting ink droplets, a plurality of connecting channels in communication with the nozzles and pressure chambers. The nozzles are formed in a row at a uniform pitch. The connecting channels extend from the nozzles alternately in opposite directions in a staggered formation and are offset a prescribed angle to a direction orthogonal to the row of nozzles. The chamber plate includes the pressure chambers, restrictors, and common ink chambers formed therein. Each pressure chamber has an elongated shape extending in a direction orthogonal to the row of nozzles. The pressure chambers are formed in rows, one on either side of the row of nozzles, so that the pressure chambers in one row oppose the corresponding pressure chambers in the other row. The diaphragm plate has a vibration plate that seals the pressure chambers.Type: GrantFiled: March 1, 2006Date of Patent: March 23, 2010Assignee: Ricoh Printing Systems, Ltd.Inventors: Satoru Tobita, Ryouta Matsufuji, Tomohiko Koda
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Patent number: 7654652Abstract: An ink jet head having: a common ink chamber for storing an ink supplied from an ink supply part; an ink supply path for supplying the ink stored in the common ink chamber; a pressure chamber to which the ink is supplied via the ink supply path; and a nozzle for discharging the ink in the pressure chamber in accordance with a pressure change in the pressure chamber. The components being constructed by stacking a plurality of thin plate members, wherein a plurality of the ink supply paths are arranged in parallel.Type: GrantFiled: August 31, 2005Date of Patent: February 2, 2010Assignee: Ricoh Printing Systems, Ltd.Inventors: Satoru Tobita, Toshiharu Sumiya, Ryouta Matsufuji
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Patent number: 7131718Abstract: A housing of inkjet head has a projection that is formed with a plurality of opening grooves defined between adjacent two of projecting parts, and tip ends of the projecting parts are fixed to a diaphragm plate. Piezoelectric elements are inserted in respective opening grooves and fixed to a diaphragm of the diaphragm plate at positions opposite respective pressure chambers.Type: GrantFiled: June 16, 2004Date of Patent: November 7, 2006Assignee: Ricoh Printing Systems, Ltd.Inventors: Ryouta Matsufuji, Satoru Tobita, Yoshitaka Akiyama, Toshiharu Sumiya, Yoshikane Matsumoto
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Publication number: 20060197809Abstract: An inkjet recording head includes a nozzle plate, chamber plate, and a diaphragm plate. The nozzle plate includes a plurality of nozzles for ejecting ink droplets, a plurality of connecting channels in communication with the nozzles and pressure chambers. The nozzles are formed in a row at a uniform pitch. The connecting channels extend from the nozzles alternately in opposite directions in a staggered formation and are offset a prescribed angle to a direction orthogonal to the row of nozzles. The chamber plate includes the pressure chambers, restrictors, and common ink chambers formed therein. Each pressure chamber has an elongated shape extending in a direction orthogonal to the row of nozzles. The pressure chambers are formed in rows, one on either side of the row of nozzles, so that the pressure chambers in one row oppose the corresponding pressure chambers in the other row. The diaphragm plate has a vibration plate that seals the pressure chambers.Type: ApplicationFiled: March 1, 2006Publication date: September 7, 2006Inventors: Satoru Tobita, Ryouta Matsufuji, Tomohiko Koda
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Publication number: 20060044364Abstract: An ink jet head comprising: a common ink chamber for storing an ink supplied from an ink supply part; an ink supply path for supplying the ink stored in the common ink chamber; a pressure chamber to which the ink is supplied via the ink supply path; and a nozzle for discharging the ink in the pressure chamber in accordance with a pressure change in the pressure chamber. The components being constructed by stacking a plurality of thin plate members, wherein a plurality of the ink supply paths are arranged in parallel.Type: ApplicationFiled: August 31, 2005Publication date: March 2, 2006Inventors: Satoru Tobita, Toshiharu Sumiya, Ryouta Matsufuji
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Publication number: 20040263579Abstract: A housing of inkjet head has a projection that is formed with a plurality of opening grooves defined between adjacent two of projecting parts, and tip ends of the projecting parts are fixed to a diaphragm plate. Piezoelectric elements are inserted in respective opening grooves and fixed to a diaphragm of the diaphragm plate at positions opposite respective pressure chambers.Type: ApplicationFiled: June 16, 2004Publication date: December 30, 2004Inventors: Ryouta Matsufuji, Satoru Tobita, Yoshitaka Akiyama, Toshiharu Sumiya, Yoshikane Matsumoto