Patents by Inventor Junichi Doi
Junichi Doi 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: 11948026Abstract: Formed is a dither pattern that makes it possible to output an image with excellent dot dispersibility and reduced graininess regardless of controls after quantization processing. To this end, an extended pattern in which multiple divided pixels correspond to each of multiple pixels included in quantization data and one or more of the multiple divided pixels are determined as dot-arrangeable-pixels in which dots can be printed is generated. Thereafter, the thresholds of the dither pattern are set based on the extended pattern in which the dots are arranged to obtain predetermined dispersibility.Type: GrantFiled: April 26, 2022Date of Patent: April 2, 2024Assignee: CANON KABUSHIKI KAISHAInventors: Junichi Nakagawa, Hirokazu Tanaka, Tsukasa Doi, Mayuko Yamagata, Satoshi Seki
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Publication number: 20240086662Abstract: An object is to print a high quality image with resistance to print misalignment. To this end, the image processing apparatus generates quantized data for printing a first dot pattern and a second dot pattern in an overlapping manner. The first dot pattern and the second dot pattern are lattice patterns varying in a combination of two basis vectors. In a combined dot pattern obtained by combining the first and second dot patterns, there is a neighboring dot in which a dot in the first dot pattern and a dot in the second dot pattern are arranged at an interval smaller than a lattice spacing. The neighboring dot includes multiple neighboring dots varying in an approach direction.Type: ApplicationFiled: November 16, 2023Publication date: March 14, 2024Inventors: Tsukasa Doi, Hirokazu Tanaka, Satoshi Seki, Junichi Nakagawa, Mayuko Yamagata
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Publication number: 20240017957Abstract: An image forming system includes: an image forming apparatus that forms an image on a recording medium; a post-processing device that executes post-processing to the recording medium on which the image is formed by the image forming apparatus; a physical property detector that detects physical property information of the recording medium; and a hardware processor that determines a restriction content of the post-processing based on registered post-processing restriction information depending on the physical property information having been detected.Type: ApplicationFiled: June 22, 2023Publication date: January 18, 2024Applicant: Konica Minolta, Inc.Inventor: Junichi Doi
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Patent number: 8303457Abstract: An automatic transmission has first, second and third gear sets, first and second clutches, and first, second and third brakes. First, second and third sun gears, and a first carrier are interconnected with a second sun gear, a second carrier, a third carrier, an input shaft and an output gear, respectively. The first clutch selectively connects the first sun gear and the second sun gear to the input shaft, and the second clutch selectively connects the first ring gear and the second carrier to the input shaft. The first brake selectively connects the first ring gear and the second carrier to a casing. The second brake selectively connects the second ring gear and the third carrier to the casing, and the third brake selectively connects the third ring gear to the casing.Type: GrantFiled: May 30, 2008Date of Patent: November 6, 2012Assignee: Mazda Motor CorporationInventors: Junichi Doi, Shinya Kamada, Takamichi Teraoka, Tokimori Saka, Tatsuhiko Iwasaki, Naohiro Sakaue, Tatsutoshi Mizobe, Hideo Toyota, Kensuke Ueda, Norio Iwashita
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Patent number: 8210975Abstract: An automatic transmission is provided. One embodiment of the automatic transmission may include a valve body including control valves for hydraulically controlling a friction engaging element provided within said transmission. The automatic transmission may further include an electric control unit located on said valve body for controlling gear shifting of said automatic transmission. The automatic transmission may further include a transmission case having a peripheral wall for at least partially enclosing a gear shift mechanism and an outer wall provided adjacent to said peripheral wall, wherein said electric control unit is located within a containing space surrounded by said peripheral wall, said outer wall and said valve body.Type: GrantFiled: August 27, 2008Date of Patent: July 3, 2012Assignee: Mazda Motor CorporationInventors: Tatsutoshi Mizobe, Junichi Doi, Shinya Kamada, Keiichiro Sueshige, Akihiro Mitani
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Patent number: 7891476Abstract: Each of first and second multi-plate clutches comprises a clutch outer cylinder portion provided to be coaxial with the input shaft and connected with a first or second rotational element, a clutch inner cylinder portion provided to be coaxial with an input shaft, plural clutch plates provided between these cylinder portions to slide in an axial direction of the input shaft within the clutch outer or inner cylinder portion, and a clutch piston provided to slide in the axial direction and press the clutch plates for connecting the clutch outer cylinder portion with the clutch inner cylinder portion. The clutch outer and inner cylinder portions of each of the first and second multi-plate clutches are provided in the axial direction, and there is provided a support wall portion that is connected with the input shaft and supports the clutch inner cylinder portion of each of the multi-plate clutches.Type: GrantFiled: October 23, 2007Date of Patent: February 22, 2011Assignee: Mazda Motor CorporationInventors: Tatsuhiko Iwasaki, Junichi Doi, Tatsutoshi Mizobe, Naohiro Sakaue
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Patent number: 7749128Abstract: There is provided an automatic transmission comprising a first shaft capable of receiving torque from an engine, and four planetary gear sets arranged coaxially on the first shaft and in series in an axial direction of the first shaft. Each of the four planetary gear sets has a single sun gear and a single ring gear. Further, the automatic transmission comprises an output wheel arranged coaxially on the first shaft, and capable of outputting torque transmitted from the engine through some of the four planetary gear sets. The output wheel is arranged between two of the four planetary gear sets. Accordingly, the noise or vibration from the planetary gear sets in the automatic transmission may be reduced, while the overall length of the first shaft may be made shorter, and the overall size of the automatic transmission may be made smaller.Type: GrantFiled: November 1, 2006Date of Patent: July 6, 2010Assignee: Mazda Motor CorporationInventors: Shinya Kamada, Takamichi Teraoka, Junichi Doi, Tokimori Saka, Tatsuhiko Iwasaki, Naohiro Sakaue, Tatsutoshi Mizobe, Yoshihiko Fujita, Norio Iwashita, Satoshi Komori, Kazuhiko Ueda, Seiji Esaki
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Patent number: 7704182Abstract: On an input shaft are provided in order from a side of an engine a torque converter with a lock-up clutch, a first planetary gear set as a multiplying mechanism, a counter drive gear outputting a rotational drive force to a countershaft, a second planetary gear set as a speed-change element, a third planetary gear set as a speed-change element. Accordingly, there can be provided an automatic transmission for six forward speeds with plural planetary gear sets, clutches and brakes that can properly reduce a clutch capacity and restrain gear noises with its compact and light-weighted structure.Type: GrantFiled: October 23, 2007Date of Patent: April 27, 2010Assignee: Mazda Motor CorporationInventors: Shinya Kamada, Junichi Doi, Takamichi Teraoka, Tokimori Saka, Shinya Yamamoto, Tatsuhiko Iwasaki, Tatsutoshi Mizobe, Hideo Toyota, Naohiro Sakaue, Norio Iwashita
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Patent number: 7553253Abstract: In an automatic transmission (AT) in which an input shaft (Input) and an output gear (Output) are disposed on the same axis and three clutches (C1-C3) and two brakes (B1, B2) are selectively operated to provide six forward speeds, first and second planetary gear sets (GS1, GS2) are configured to consistently reduce the speed of input rotation and output the speed-reduced rotation, thereby enabling downsizing of them. The first and second planetary gear sets (GS1, GS2) are arranged in a transmission case at both the axial ends thereof. Third and fourth planetary gear sets (GS3, GS4) are connected to each other to have four rotation elements in combination, thereby constituting a Simpson planetary gear train. One of the four rotation elements (a fourth carrier (PC4) in an illustrated example) is connected to the output gear (Output).Type: GrantFiled: August 31, 2006Date of Patent: June 30, 2009Assignee: Mazda Motor CorporationInventors: Shinya Kamada, Junichi Doi, Takamichi Teraoka, Tokimori Saka, Tatsutoshi Mizobe, Naohiro Sakaue, Yoshihiko Fujita, Norio Iwashita, Satoshi Komori, Kazuhiko Ueda, Seiji Esaki
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Publication number: 20090088281Abstract: An automatic transmission is provided. One embodiment of the automatic transmission may include a valve body including control valves for hydraulically controlling a friction engaging element provided within said transmission. The automatic transmission may further include an electric control unit located on said valve body for controlling gear shifting of said automatic transmission. The automatic transmission may further include a transmission case having a peripheral wall for at least partially enclosing a gear shift mechanism and an outer wall provided adjacent to said peripheral wall, wherein said electric control unit is located within a containing space surrounded by said peripheral wall, said outer wall and said valve body.Type: ApplicationFiled: August 27, 2008Publication date: April 2, 2009Applicant: Mazda Motor CorporationInventors: Tatsutoshi Mizobe, Junichi Doi, Shinya Kamada, Keiichiro Sueshige, Akihiro Mitani
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Patent number: 7485068Abstract: In an automatic transmission (AT) in which an input shaft (Input) and an output gear (Output) are disposed on the same axis and three clutches (C1-C3) and two brakes (B1, B2) are selectively operated to provide six forward speeds, first and second planetary gear sets (GS1, GS2) are configured to consistently reduce the speed of input rotation and output the speed-reduced rotation, thereby enabling downsizing of them. The first and second planetary gear sets (GS1, GS2) are arranged in a transmission case at both the axial ends thereof. Third and fourth planetary gear sets (GS3, GS4) are connected to each other to have four rotation elements in combination, thereby constituting a Simpson planetary gear train. One of the four rotation elements (a fourth carrier (PC4) in an illustrated example) is connected to the output gear (Output).Type: GrantFiled: August 31, 2006Date of Patent: February 3, 2009Assignee: Mazda Motor CorporationInventors: Shinya Kamada, Junichi Doi, Takamichi Teraoka, Tokimori Saka, Tatsutoshi Mizobe, Naohiro Sakaue, Yoshihiko Fujita, Norio Iwashita, Satoshi Komori, Kazuhiko Ueda, Seiji Esaki
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Publication number: 20080300095Abstract: An automatic transmission comprises first, second and third gear sets 10, 20, 30 each formed as a single-pinion type planetary gear set, first and second clutches 40, 50, and first, second and third brakes 60, 70, 80. A first sun gear 11, a first ring gear 14, a second ring gear 24, a third sun gear 31 and a first carrier 13 are continuously interconnected with a second sun gear 21, a second carrier 23, a third carrier 33, an input shaft 4 and an output gear 7, respectively. The first clutch 40 is operable to selectively connect and disconnect the first sun gear 11 and the second sun gear 21 to/from the input shaft 4, and the second clutch 50 is operable to selectively connect and disconnect the first ring gear 14 and the second carrier 13 to/from the input shaft 4. The first brake 60 is operable to selectively connect and disconnect the first ring gear 14 and the second carrier 23 to/from a casing 6.Type: ApplicationFiled: May 30, 2008Publication date: December 4, 2008Inventors: Junichi Doi, Shinya Kamada, Takamichi Teraoka, Tokimori Saka, Tatsuhiko Iwasaki, Naohiro Sakaue, Tatsutoshi Mizobe, Hideo Toyota, Kensuke Ueda, Norio Iwashita
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Publication number: 20080113845Abstract: On an input shaft are provided in order from a side of an engine a torque converter with a lock-up clutch, a first planetary gear set as a multiplying mechanism, a counter drive gear outputting a rotational drive force to a countershaft, a second planetary gear set as a speed-change element, a third planetary gear set as a speed-change element. Accordingly, there can be provided an automatic transmission for six forward speeds with plural planetary gear sets, clutches and brakes that can properly reduce a clutch capacity and restrain gear noises with its compact and light-weighted structure.Type: ApplicationFiled: October 23, 2007Publication date: May 15, 2008Applicant: MAZDA MOTOR CORPORATIONInventors: Shinya KAMADA, Junichi DOI, Takamichi TERAOKA, Tokimori SAKA, Shinya YAMAMOTO, Tatsuhiko IWASAKI, Tatsutoshi MIZOBE, Hideo TOYOTA, Naohiro SAKAUE, Norio IWASHITA
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Publication number: 20080108468Abstract: Each of first and second multi-plate clutches comprises a clutch outer cylinder portion provided to be coaxial with the input shaft and connected with a first or second rotational element, a clutch inner cylinder portion provided to be coaxial with an input shaft, plural clutch plates provided between these cylinder portions to slide in an axial direction of the input shaft within the clutch outer or inner cylinder portion, and a clutch piston provided to slide in the axial direction and press the clutch plates for connecting the clutch outer cylinder portion with the clutch inner cylinder portion. The clutch outer and inner cylinder portions of each of the first and second multi-plate clutches are provided in the axial direction, and there is provided a support wall portion that is connected with the input shaft and supports the clutch inner cylinder portion of each of the multi-plate clutches.Type: ApplicationFiled: October 23, 2007Publication date: May 8, 2008Applicant: MAZDA MOTOR CORPORATIONInventors: Tatsuhiko IWASAKI, Junichi DOI, Tatsutoshi MIZOBE, Naohiro SAKAUE
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Patent number: 7361780Abstract: The present invention provides an apparatus for producing hydroxyalkyl(meth)acrylate and method for producing hydroxyalkyl(meth)acrylate, which can maintain high sealing performance even if the maintenance frequency of the blowdown valve is reduced. The apparatus for producing hydroxyalkyl(meth)acrylate of the present invention has a reaction vessel for synthesizing hydroxyalkyl(meth)acrylate, which has a blowdown valve placed in the reaction vessel, and the blowdown valve is opened when discharging contents of the reaction vessel and is a ball valve. The method of producing hydroxyalkyl(meth)acrylate of the present invention involves producing hydroxyalkyl(meth)acrylate using the aforementioned apparatus for producing hydroxyalkyl(meth)acrylate.Type: GrantFiled: January 30, 2004Date of Patent: April 22, 2008Assignees: Mitsubishi Rayon Co., Ltd., Osaka Organic Chemical Ind., Ltd.Inventors: Yoshihiko Satou, Katsunari Shigemune, Junichi Doi, Yasuhiro Kabu, Nobuo Ooya
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Publication number: 20080070741Abstract: There are provided a first planetary gear set including a first sun gear, a first carrier, and a first ring gear; a second planetary gear set including a second sun gear, a second carrier, and a second ring gear; and a third planetary gear set including a third sun gear, a third carrier, and a third ring gear. A first forward speed ratio is established with the engagement of a third brake and a first clutch; a second forward speed ratio is established with the engagement of a first brake and the first clutch; a third forward speed ratio is established with the engagement of a second brake and the first clutch; a fourth forward speed ratio is established with the engagement of the first clutch and a second clutch; a fifth forward speed ratio is established with the engagement of the second brake and the second clutch; and a sixth forward speed ratio is established with the engagement of the first brake and the second clutch.Type: ApplicationFiled: July 19, 2007Publication date: March 20, 2008Applicant: MAZDA MOTOR CORPORATIONInventors: Norio Iwashita, Shinya Kamada, Takamichi Teraoka, Tokimori Saka, Junichi Doi, Tatsuhiko Iwasaki
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Publication number: 20080017469Abstract: A hub and a drum are respectively provided inside and outside a forward clutch (multiple-disc clutch) of an automatic transmission for a vehicle. A piston for pushing the forward clutch and a hydraulic servo for controlling the piston are provided inside the hub. A plurality of notched portions are formed in the piston and the hub with the positions thereof displaced from each other in the peripheral direction so that the piston and the hub are overlapped with each other in the axial direction in such a fashion that parts of one of the piston and the hub where no notched portions are formed are inserted into the notched portions of the other.Type: ApplicationFiled: July 10, 2007Publication date: January 24, 2008Applicant: MAZDA MOTOR CORPORATIONInventors: Tatsuhiko Iwasaki, Junichi Doi, Tatsutoshi Mizobe, Naohiro Sakaue
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Patent number: 7241916Abstract: A method of producing a methacrylic acid ester which comprises carrying out an ester-exchange reaction between methyl methacrylate and an alcohol or a phenol while removing by-product methanol as an azeotropic mixture with methyl methacrylate from the reaction system under reflux conditions, by the use of a reaction apparatus equipped with a distillation column. A methacrylic acid ester is produced with a good productivity by controlling the reflux ratio.Type: GrantFiled: February 3, 2004Date of Patent: July 10, 2007Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Junichi Doi, Yoshihiko Satou, Yoshiyuki Taniguchi, Masanori Tokuda
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Patent number: 7228950Abstract: A transmission apparatus is disclosed which can improve the locking response speed of a lockup clutch when an engine is driven by the output side, without largely changing the structure of the lockup clutch or the like. In the lockup clutch of this transmission apparatus, fixing portions (21a) for a support member (24) of a damper spring (23) are fixed to a plurality of portions on a predetermined circumference of a piston (21) which are inside a friction member (22). Projections (21b) extending in the radial direction are formed, at those positions of the lockup piston (21) which are inside the friction member (22) and sandwiched by the fixing portions (21a) for the support member (24) of the damper spring (23), to project toward a front cover.Type: GrantFiled: March 14, 2005Date of Patent: June 12, 2007Assignees: Mazda Motor Company, Exedy CorporationInventors: Junichi Doi, Shinya Kamada, Norio Iwashita, Kazuhito Maeda
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Publication number: 20070099742Abstract: There is provided an automatic transmission comprising a first shaft capable of receiving torque from an engine, and four planetary gear sets arranged coaxially on the first shaft and in series in an axial direction of the first shaft. Each of the four planetary gear sets has a single sun gear and a single ring gear. Further, the automatic transmission comprises an output wheel arranged coaxially on the first shaft, and capable of outputting torque transmitted from the engine through some of the four planetary gear sets. The output wheel is arranged between two of the four planetary gear sets. Accordingly, the noise or vibration from the planetary gear sets in the automatic transmission may be reduced, while the overall length of the first shaft may be made shorter, and the overall size of the automatic transmission may be made smaller.Type: ApplicationFiled: November 1, 2006Publication date: May 3, 2007Applicant: Mazda Motor CorporationInventors: Shinya Kamada, Takamichi Teraoka, Junichi Doi, Tokimori Saka, Tatsuhiko Iwasaki, Naohiro Sakaue, Tatsutoshi Mizobe, Yoshihiko Fujita, Norio Iwashita, Satoshi Komori, Kazuhiko Ueda, Seiji Esaki