Patents by Inventor Tsutomu Nakagawa
Tsutomu Nakagawa 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).
-
Publication number: 20070025773Abstract: A developing device includes first-third sections, a developing roller, a partitioning wall and a toner concentration detector. The first-third sections have first-third screw augers respectively. The partitioning wall isolates the third section from the first section and the second section. A supply opening is formed in a portion of the partitioning wall opposing the first section. A toner concentration detector is disposed in the third section. The first screw auger conveys developer including toner to the developing roller, into the third section via the supply opening, and into the second section. The second screw auger conveys developer accommodated in the second section into the third section. The third screw auger conveys developer accommodated in the third section into the first section. Toner is replenished into the third section based on a detection result by the toner concentration detector.Type: ApplicationFiled: July 27, 2006Publication date: February 1, 2007Inventors: Susumu Tateyama, Yoshitaka Fujinuma, Tsutomu Nakagawa, Masayoshi Nakayama
-
Publication number: 20060164513Abstract: The white chromaticity, in which the illumination environment is considered, is measured for each individual color monitor (100). A reference body (Q), comprising a perfect diffuser, is applied on the screen of the color monitor (100). By a test pattern display means (210), a test pattern (T) is displayed on the screen of the color monitor (100) based on tone values of the three primary colors R, G, and B that are stored in a tone value storage means (220). While fixing the tone value of the primary color R at 255, the tone values of the primary colors G and B are varied cyclically from 0 to 255 in a prescribed period by a tone value varying means (240). An operator inputs the result of comparing the color of the test pattern (T) and the color of the reference body (Q). When a comparison result indicating the matching of the two is input, a comparison result entering means (230) outputs an agreement signal.Type: ApplicationFiled: June 11, 2004Publication date: July 27, 2006Inventors: Tohru Sugiyama, Tsutomu Nakagawa
-
Publication number: 20060132867Abstract: The tone reproduction characteristics of a color monitor are determined at high precision by visual recognition. A pattern display means (230) displays a test pattern, comprising circular patterns (50) and a background (60), on the screen of the monitor (100) to be measured. In the background (60), a reference pattern, which is generated by a reference pattern generating means (220), is formed of a black-and-white pattern, and has a prescribed reference luminance, is displayed, and in each circular pattern (50), an even pattern with RGB tone values designated by a tone value designating means (210) is displayed. The tone of the even pattern is varied so as to vary in brightness and color by a tone value varying means (240). When the circular patterns (50) become the same in brightness and color as the background (60), an operator provides a coincidence signal to a coincidence signal input means (250).Type: ApplicationFiled: June 11, 2004Publication date: June 22, 2006Inventors: Tohru Sugiyama, Tsutomu Nakagawa
-
Publication number: 20060002749Abstract: A fixing device wherein supposing that the total load given to the heating roller and the pressure roller is W (kgf) and the area of the pressure contact portion of the heating roller with respect to the pressure roller (nip area) is S (cm2), the nip pressure (=W/S) is 2.7 kgf/cm2 or more and the length of the pressure contact portion in the direction parallel to the direction of conveyance of the recording material is defined to be 14 mm or more.Type: ApplicationFiled: July 1, 2005Publication date: January 5, 2006Applicant: RICOH PRINTING SYSTEMS, LTD.Inventors: Takashi Suzuki, Teruaki Mitsuya, Keisuke Kubota, Masato Miwa, Yoshitaka Fujinuma, Tsutomu Nakagawa
-
Publication number: 20050271431Abstract: An image formation system is configured by connecting two or more image formation devices. The system includes a fixing device fixing an unfixed development image to a record medium and a charge elimination device eliminating a charge of the record medium in an inlet of the fixing device of the second or later image formation device.Type: ApplicationFiled: May 20, 2005Publication date: December 8, 2005Applicant: Ricoh Printing Systems, Ltd.Inventors: Tsutomu Nakagawa, Koji Kato, Tomonari Hokkyo, Kenji Nozawa
-
Publication number: 20050227978Abstract: Medicament being useful as a fibrosis inhibitor for organs or tissues, which comprises a compound of the formula (I): wherein Ring Z is optionally substituted pyrrole ring, etc.; W2 is —CO—, —SO2—, optionally substituted C1-C4 alkylene, etc.; Ar2 is optionally substituted aryl, etc.; W1 and Ar1 mean the following (1) and (2): (1) W1 is optionally substituted C1-C4 alkylene, etc.; Ar1 is optionally substituted bicyclic heteroaryl having 1 to 4 nitrogen atoms as ring-forming atoms: (2) W1 is optionally substituted C2-C5 alkylene, optionally substituted C2-C5 alkenylene, etc.; and Ar1 is aryl or monocyclic heteroaryl, which is substituted by carboxyl, alkoxycarbonyl, etc. at the ortho- or meta-position thereof with respect to the binding position of W1, or a pharmaceutically acceptable salt thereof.Type: ApplicationFiled: January 28, 2003Publication date: October 13, 2005Applicant: Sumitomo Pharmaceuticals Co., Ltd.Inventors: Teruhisa Tokunaga, Willian Hume, Makoto Kitoh, Ryu Nagata, Michiko Kishino, Tsutomu Nakagawa, Jun Nagamine, Mutsuo Taiji
-
Publication number: 20030036512Abstract: Leptin resistance ameliorating agents comprising as the active ingredient a neurotrophic factor such as BDNF or a trk receptor ligand, namely, agents for ameliorating, treating or preventing hypertension, sterility, obesity, glucose metabolic disorders, ischemic diseases, growth hormone secretion insufficiency, growth hormone hyposecretion, immune function disorder, etc. caused by leptin resistance.Type: ApplicationFiled: September 6, 2002Publication date: February 20, 2003Inventors: Tsutomu Nakagawa, Mitsugu Yamanaka, Mutsuo Taiji
-
Patent number: 5923933Abstract: A uniform image is obtained by matching the sliding friction force, the moving speed and the developing agent in a developing region of two developing rollers and an electric characteristic of a photosensitive body used for image development. Two developing rollers rotating in directions opposite to each other are used, the moving direction of the first developing roller being opposite to the moving direction of the photosensitive body, and a circumferential speed ratio of a circumferential speed of the first developing roller to a circumferential speed of the photosensitive body is within a rage of 0.5 to 2.5; and the moving direction of the second developing roller is equal to the moving direction of the photosensitive body, and a circumferential speed ratio of a circumferential speed of the second developing roller to a circumferential speed of the photosensitive body is within a range of 1.5 to 3.5.Type: GrantFiled: February 13, 1998Date of Patent: July 13, 1999Assignee: Hitachi Koki Co., Ltd.Inventors: Masayasu Anzai, Tsuneaki Kawanishi, Yoshitaka Fujinuma, Hiroyoshi Matsumoto, Yasuo Takuma, Hisao Okada, Masayuki Ainoya, Takashi Suzuki, Yuichiro Suzuki, Tomonari Hokkyo, Koji Kato, Katsuya Kawai, Tsutomu Nakagawa
-
Patent number: 5393995Abstract: There is disclosed a semiconductor device wherein a p layer (7) is formed in an isolating portion (Z) and portions (1a, 1b) of an n-type base layer (1) lie on opposite sides of the p layer (7), the upper surfaces of the p layer (7) and the portions (1a, 1b) lying in the same plane as the upper surface of a p layer (3). The presence of the p layer (7) provides for high resistance to breakdown and high formation accuracy of the p layers (2, 3, 7) as compared with a structure in which the isolating portion (Z) lies in the bottom of a the recess, whereby the semiconductor device is less susceptible to short-circuit between the p-type base layer (2) and the p layer (3).Type: GrantFiled: May 28, 1993Date of Patent: February 28, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tsutomu Nakagawa, Futoshi Tokunoh, Kouji Niinobu
-
Patent number: 5278640Abstract: A pictorial image comprising pixels represented by a combination of density values in respect to first color components (R, G, B) is transformed to a pictorial image comprising pixels represented by combination of density values in respect to second color components (C, M, Y). In accordance with the first color modification method, an operation expressed as Q=.alpha.P+.beta. is implemented to an original density value P using two correction coefficients .alpha. and .beta. determined in advance to determine a density value Q after transformation. In addition, in accordance with the second color modification method, density values after transformation are determined by the calculation of the k-th degree masking equation using the k-th degree masking coefficients. At this time, a color cube is defined with respect to the first color components. The color cube thus defined is devided into an n number of blocks. The k-th degree masking coefficients are defined every respective blocks.Type: GrantFiled: September 24, 1990Date of Patent: January 11, 1994Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Masao Aizu, Mitsuhiro Hamashima, Tsutomu Nakagawa, Shunsuke Mukasa, Takashi Uchiyama, Haruo Wakabayashi
-
Patent number: 5173189Abstract: A membrane for the separation of an organic solvent from a water-organic solvent mixture has a polymeric membrane of a copolymer consisting essentially of an .alpha., .beta.-unsaturated carbonyl compound as a main monomer. The .alpha., .beta.-unsaturated carbonyl compound includes an acrylic acid ester or a methacrylic acid ester. The polymeric membrane has a crosslinked structure. The polymeric membrane is carried on a support member in the form of a flat membrane, a pipe or a hollow fiber. The polymeric member includes particles therein. The polymeric membrane is sandwiched by the support members to form a composite-type separation membrane. The composite-type separation membrane is modulated.Type: GrantFiled: June 12, 1991Date of Patent: December 22, 1992Assignee: Lintec CorporationInventors: Masaru Hoshi, Tsutomu Nakagawa, Akon Higuchi, Toshio Sugizaki
-
Patent number: 4975769Abstract: A pictorial image comprising pixels represented by a combination of density values in respect to first color components (R, G, B) is transformed to a pictorial image comprising pixels represented by combination of density values in respect to second color components (C, M, Y). In accordance with the first color modification method, an operation expressed as Q=.alpha.P+.beta. is implemented to an original density value P using two correction coefficients .alpha. and .beta. determined in advance to determine a density value Q after transformation. In addition, in accordance with the second color modification method, density values after transformation are determined by the calculation of the k-th degree masking equation using the k-th degree masking coefficients. At this time, a color cube is defined with respect to the first color components. The color cube thus defined is divided into an n number of blocks. The k-th degree masking coefficients are defined every respective blocks.Type: GrantFiled: March 6, 1989Date of Patent: December 4, 1990Assignee: Dai Nippon Insatsu Kaushiki KaishaInventors: Masao Aizu, Mitsuhiro Hamashima, Tsutomu Nakagawa, Shunsuke Mukasa, Takashi Uchiyama, Haruo Wakabayashi
-
Patent number: 4948508Abstract: A surface-hydrophilic, highly selective semipermeable membrane comprising a semipermeable membrane of a hydrophobic polymer and a hydrophilic segment having at least one end directly bonded to at least one surface of the semipermeable membrane is disclosed. The hydrophilic segment comprises at least one methylene group or substituted methylene group which is positioned at least at one end of the segment and at least one neutral hydroxyl group. The surface-hydrophilic, highly selective semipermeable membrane not only has excellent resistance to heat and organic solvents, but also non-adsorptivity for organic substances including even ionic organic substances. Therefore, the surface-hydrophilic, highly selective semipermeable membrane of the present invention can advantageously be used for microfiltration, ultrafiltration, reverse osmosis and dialysis.Type: GrantFiled: April 21, 1989Date of Patent: August 14, 1990Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Tsutomu Nakagawa, Akon Higuchi
-
Patent number: 4881118Abstract: One surface of a cathode sliding compensator is finished as an irregular surface while another surface thereof is finished as a sliding surface. The irregular surface is arranged to contact with a cathode electrode layer of a semiconductor element while the sliding surface is arranged to contact with a cathode conductor, and junction surfaces therebetween are electrically and mechanically connected by pressurization. Thus, the irregular surface bites into the cathode electrode layer to attain excellent electrical and mechanical connection between the cathode electrode layer and the cathode sliding compensator, while slidingness can be effectively retained between the cathode conductor and the cathode sliding compensator by the function of the sliding surface.Type: GrantFiled: April 28, 1989Date of Patent: November 14, 1989Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazuhiko Niwayama, Tsutomu Nakagawa, Futoshi Tokunoh, Shigekazu Yoshida
-
Patent number: 4639276Abstract: A thyristor having a high tolerable voltage V.sub.Bo comprising a first emitter layer (3), a first base layer (1), a second base layer (2), a second emitter layer (4) covering the surface except for a gate region (5) of the second emitter layer, said layers being of alternating semiconductivity types, a first emitter electrode (6), a second emitter electrode (7) and a gate electrode (8) overlaying the gate region, wherein the gate region is formed over an area of the first base region having a higher impurity concentration than any other area of the first base layer. The area of highest impurity concentration may be formed by a process of pulling an ingot of silicon from the melt with a magnetic field applied perpendicular to the convection of silicon with the temperature at the desired area being higher than elsewhere or by a process of neutron irradiating a wafer of float-zone silicon with the highest neutron dose at the desired area.Type: GrantFiled: September 19, 1985Date of Patent: January 27, 1987Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Tsutomu Nakagawa
-
Patent number: 4586070Abstract: A thyristor has a pnpn four layer structure having a positive bevel in an anode side and a negative bevel in a cathode side. A ramp of a distribution of impurity concentrations in an anode-emitter layer near an anode-emitter junction is greater than a ramp of a distribution of impurity concentrations in a cathode-base layer near a central junction so as to improve the trade-off relation between the forward voltage drop and the withstand voltage.Type: GrantFiled: March 5, 1985Date of Patent: April 29, 1986Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Tsutomu Nakagawa
-
Patent number: 4559551Abstract: The semiconductor device has a first emitter layer and an auxiliary first emitter layer each having a first electrical conductivity, a first base layer having a second electrical conductivity, a second base layer having said first electrical conductivity and a second emitter layer having said second electrical conductivity. The layers are formed in the stated order from one main surface of the semiconductor to the other with the first base layer being partially exposed in the region of the auxiliary first emitter layer on said one main surface to form a gate region. A heavy metal impurity such as gold or platinum whose density is higher than the impurity density determining the electrical conductivity of said second base layer is selectively diffused in a particular region which extends through said gate region to make the specific resistance of said second base layer inside said particular region higher than the specific resistance of said second base layer outside said particular region.Type: GrantFiled: September 17, 1984Date of Patent: December 17, 1985Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Tsutomu Nakagawa
-
Patent number: 4420612Abstract: A catalyst membrane including a porous polytetrafluoroethylene membrane having grafted thereon polystyrenesulfonic acid. The catalyst membrane is useful for hydrolyzing water soluble organic substances such as polysaccharides.Type: GrantFiled: February 28, 1983Date of Patent: December 13, 1983Assignee: Director Genereal of Agency of Industrial Science & TechnologyInventors: Seiichi Aiba, Kazuhisa Hiratani, Tsutomu Nakagawa
-
Patent number: 4000126Abstract: A translucent film having good water permeability and having dissociating power with respect to metallic ions is produced by subjecting one side of a cellulose film to acetylation treatment so as to highly acetylate said one side while leaving the other side unacetylated.Type: GrantFiled: March 31, 1975Date of Patent: December 28, 1976Assignee: Agency of Industrial Science & TechnologyInventor: Tsutomu Nakagawa