Patents by Inventor Mitsutaka Iwasaki
Mitsutaka Iwasaki 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: 20080309706Abstract: A liquid ejecting apparatus for ejecting liquid from an ejection head, the liquid being supplied from a liquid supplying source, the liquid ejecting apparatus comprising: a carriage having the ejection head including: a liquid channel configured for flowing the liquid from the liquid supplying source to the ejection head; a gas trap chamber which is formed in the midstream of the liquid channel and expands the width of the liquid channel; and a gas recovery chamber which is adjacent to the gas trap chamber and having a gas permeable wall between the gas recovery chamber and the gas trap chamber; a carriage driver which drives the carriage; an attachment/detachment connection which is detachably connected to the gas recovery chamber; and a depressurization unit which decreases a pressure of the gas recovery chamber to a pressure lower than that of the gas trap chamber via the attachment/detachment connection.Type: ApplicationFiled: June 13, 2008Publication date: December 18, 2008Applicant: SEIKO EPSON CORPORATIONInventors: Hideya Yokouchi, Mitsutaka Iwasaki
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Patent number: 7422308Abstract: For cleaning a recording head, a printer seals nozzles by means of a cap member and thus forms a closed circulatory system. In this state, a gear pump is activated and draws waste ink and the air from the cap member. The waste ink and the air then flow in the cap member, a check valve, a tube, the gear pump, and a different tube in this order and are introduced into a first ink cartridge. The air is introduced into a second ink cartridge through a corresponding tube as pressurized air. The check valve prevents the waste ink and the pressurized air from returning to the cap member. This suppresses backflow of the liquid and the air, and ink ejection is performed effectively.Type: GrantFiled: January 14, 2005Date of Patent: September 9, 2008Assignee: Seiko Epson CorporationInventor: Mitsutaka Iwasaki
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Patent number: 7401889Abstract: Recording head of a printer is sealed by a cap connected with a gear pump. Fluid is discharged from a nozzle through the cap by a negative pressure being generated by the gear pump. The gear pump is driven at a first rotational speed to suck the fluid in the cap and to discharge the fluid from the nozzle. Subsequently, the gear pump is driven at a second rotational speed lower than the first rotational speed and then it is stopped. This prevents backflow of the fluid to a liquid ejection head and breakage of a liquid meniscus in the nozzle of the liquid ejection head occurring when cleaning of the liquid ejection head is ended.Type: GrantFiled: January 14, 2005Date of Patent: July 22, 2008Assignee: Seiko Epson CorporationInventor: Mitsutaka Iwasaki
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Patent number: 7374272Abstract: A liquid ejecting apparatus includes: a head member having a nozzle and a liquid-ejecting unit; a main controlling part that drives the liquid-ejecting unit based on ejecting data; a capping member relatively movable between a position away from the head member and a position in contact with the head member; a suction way communicated with an inside of the capping member; and a built-in slide-rotator type of positive displacement pump provided in the suction way. A state-quantity recognizing part recognizes a state quantity related to a dry state in an inside of the positive displacement pump. A judging part judges whether the inside of the positive displacement pump is dry, by comparing the state quantity with a standard state quantity. A preliminary-operation carrying-out part carries out a preliminary operation for wetting the inside of the positive displacement pump, when the inside of the positive displacement pump is dry.Type: GrantFiled: June 17, 2005Date of Patent: May 20, 2008Assignee: Seiko Epson CorporationInventors: Tatsuya Seshimo, Mitsutaka Iwasaki
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Patent number: 7349579Abstract: The present invention provides an image processing device, an image processing method, and an image reading method, by which encoded data can be easily generated from sub-sampled image data, without a complicated circuit or an increase in the data amount. A one-dimensional wavelet transform in a predetermined direction is omitted in stage 1, where components 1 and 2 of input image data have been sub-sampled. When coefficient data generated through such a two-dimensional wavelet transform are to be encoded, sub-bands that are not contained in the coefficient data in comparison with the coefficient data of a component 0 should be considered to have been truncated.Type: GrantFiled: September 20, 2002Date of Patent: March 25, 2008Assignee: Ricoh Company, Ltd.Inventors: Yukio Kadowaki, Mitsutaka Iwasaki, Yutaka Sato, Kazuhiro Miyazaki
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Patent number: 7296984Abstract: A gear pump includes a housing defining an accommodating chamber and a cover for sealing the accommodating chamber. The accommodating chamber accommodates a drive gear and a driven gear. Each of the drive gear and the driven gear includes an upper surface opposed to the cover and a lower surface opposed to the housing. An annular projection projects from the upper surface of the drive gear or the driven gear for contacting the seal plate. An annular projection projects from the lower surface of the drive gear or the driven gear for contacting the seal plate. The gear pump is capable of lowering the load when the drive gear and the driven gear are rotated.Type: GrantFiled: December 3, 2004Date of Patent: November 20, 2007Assignee: Seiko Epson CorporationInventor: Mitsutaka Iwasaki
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Publication number: 20070182779Abstract: Recording head of a printer is sealed by a cap connected with a gear pump. Fluid is discharged from a nozzle through the cap by a negative pressure being generated by the gear pump. The gear pump is driven at a first rotational speed to suck the fluid in the cap and to discharge the fluid from the nozzle. Subsequently, the gear pump is driven at a second rotational speed lower than the first rotational speed and then it is stopped. This prevents backflow of the fluid to a liquid ejection head and breakage of a liquid meniscus in the nozzle of the liquid ejection head occurring when cleaning of the liquid ejection head is ended.Type: ApplicationFiled: January 14, 2005Publication date: August 9, 2007Applicant: Seiko Epson CorporationInventor: Mitsutaka Iwasaki
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Publication number: 20060207678Abstract: For cleaning a recording head, a printer seals nozzles by means of a cap member and thus forms a closed circulatory system. In this state, a gear pump is activated and draws waste ink and the air from the cap member. The waste ink and the air then flow in the cap member, a check valve, a tube, the gear pump, and a different tube in this order and are introduced into a first ink cartridge. The air is introduced into a second ink cartridge through a corresponding tube as pressurized air. The check valve prevents the waste ink and the pressurized air from returning to the cap member. This suppresses backflow of the liquid and the air, and ink ejection is performed effectively.Type: ApplicationFiled: January 14, 2005Publication date: September 21, 2006Inventor: Mitsutaka Iwasaki
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Publication number: 20050285146Abstract: A semiconductor device includes a plurality of primitive cells having multilayer wiring structures and formed on a substrate. The primitive cell includes a functional cell having a logic circuit and a wiring cell. The wiring cell includes a wiring part electrically connecting a plurality of the functional cells. The wiring part is a top layer connection wiring formed by a top layer wiring of the multilayer wiring structure.Type: ApplicationFiled: June 17, 2005Publication date: December 29, 2005Inventor: Mitsutaka Iwasaki
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Publication number: 20050275682Abstract: A liquid ejecting apparatus includes: a head member having a nozzle and a liquid-ejecting unit; a main controlling part that drives the liquid-ejecting unit based on ejecting data; a capping member relatively movable between a position away from the head member and a position in contact with the head member; a suction way communicated with an inside of the capping member; and a built-in slide-rotator type of positive displacement pump provided in the suction way. A state-quantity recognizing part recognizes a state quantity related to a dry state in an inside of the positive displacement pump. A judging part judges whether the inside of the positive displacement pump is dry, by comparing the state quantity with a standard state quantity. A preliminary-operation carrying-out part carries out a preliminary operation for wetting the inside of the positive displacement pump, when the inside of the positive displacement pump is dry.Type: ApplicationFiled: June 17, 2005Publication date: December 15, 2005Inventors: Tatsuya Seshimo, Mitsutaka Iwasaki
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Publication number: 20050238505Abstract: A high-performance gear pump that does not require highly accurate machining is disclosed. The gear pump includes a housing having an accommodation chamber. A drive gear and a driven gear are positioned in contact with an inner surface of the accommodation chamber. The drive shaft is loosely received by the shaft hole of the drive gear, and the driven shaft is loosely received by the shaft support formed in the housing and the cover.Type: ApplicationFiled: December 3, 2004Publication date: October 27, 2005Inventor: Mitsutaka Iwasaki
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Publication number: 20050196301Abstract: A gear pump includes a housing defining an accommodating chamber and a cover for sealing the accommodating chamber. The accommodating chamber accommodates a drive gear and a driven gear. Each of the drive gear and the driven gear includes an upper surface opposed to the cover and a lower surface opposed to the housing. An annular projection projects from the upper surface of the drive gear or the driven gear for contacting the seal plate. An annular projection projects from the lower surface of the drive gear or the driven gear for contacting the seal plate. The gear pump is capable of lowering the load when the drive gear and the driven gear are rotated.Type: ApplicationFiled: December 3, 2004Publication date: September 8, 2005Inventor: Mitsutaka Iwasaki
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Publication number: 20040247185Abstract: An image processing apparatus is provided that has a smaller circuit size and flexibly copes with applications having various amounts of additional information. This image processing apparatus that produces data having the additional information added to the encoded data of an image includes: a data processing unit that produces data having a data write area for writing a desired amount of data of the additional information at a predetermined spot in the encoded data of the image; and a data correction unit that writes the data of the additional information in the data write area in the data produced by the data processing unit.Type: ApplicationFiled: May 6, 2004Publication date: December 9, 2004Inventors: Yutaka Sato, Mitsutaka Iwasaki, Yukio Kadowaki
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Publication number: 20030152280Abstract: The present invention provides an image processing device, an image processing method, and an image reading method, by which encoded data can be easily generated from sub-sampled image data, without a complicated circuit or an increase in the data amount. A one-dimensional wavelet transform in a predetermined direction is omitted in stage 1, where components 1 and 2 of input image data have been sub-sampled. When coefficient data generated through such a two-dimensional wavelet transform are to be encoded, sub-bands that are not contained in the coefficient data in comparison with the coefficient data of a component 0 should be considered to have been truncated.Type: ApplicationFiled: September 20, 2002Publication date: August 14, 2003Inventors: Yukio Kadowaki, Mitsutaka Iwasaki, Yutaka Sato, Kazuhiro Miyazaki
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Patent number: 6529062Abstract: A power module is provided with an insulating substrate with a heat sink being bonded to one surface thereof and a circuit pattern being formed on the other surface. The circuit pattern is formed by an electrode layer. A switching semiconductor element and a free wheeling diode that is connected to a switching semiconductor element in anti-parallel therewith are placed on the circuit pattern. A controlling IC for controlling the switching semiconductor element is placed on the free wheeling diode. Thus, it is possible to make the entire power module compact, and it becomes possible to provide an inexpensive power module which can prevent the controlling IC from malfunctioning due to heat generated by the switching semiconductor element.Type: GrantFiled: January 23, 2001Date of Patent: March 4, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Gourab Majumdar, Mitsutaka Iwasaki, Shinji Hatae, Fumitaka Tametani, Toru Iwagami, Akihisa Yamamoto
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Patent number: RE39109Abstract: An inverter circuit to reduce a resistor for overcurrent detection and decrease the number of filters in an inverter circuit for supply polyphase power. Transistors each having a current detection terminal and a protective diode for regenerative current are adopted as switching elements on an “L” side and their current detection terminals are connected in common to a resistor. Therefore, a voltage drop caused by a current flowing in the resisytor becomes larger when an overcurrent flows in at least one of the transistors and further when an overcurrent flows in a switching element on an “H” side even if no overcurrent flows in any one of the transistors.Type: GrantFiled: September 30, 1998Date of Patent: May 30, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Gorab Majumdar, Mitsutaka Iwasaki, Tooru Iwagami, Khalid Hassan Hussein
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Patent number: D470463Type: GrantFiled: March 5, 2002Date of Patent: February 18, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Mitsutaka Iwasaki, Toru Iwagami, Hisashi Kawafuji
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Patent number: D470824Type: GrantFiled: March 5, 2002Date of Patent: February 25, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Mitsutaka Iwasaki, Toru Iwagami, Hisashi Kawafuji
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Patent number: D470825Type: GrantFiled: April 24, 2002Date of Patent: February 25, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Mitsutaka Iwasaki, Toru Iwagami, Hisashi Kawafuji
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Patent number: D472530Type: GrantFiled: March 4, 2002Date of Patent: April 1, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Mitsutaka Iwasaki, Toru Iwagami, Hisashi Kawafuji