Patents by Inventor Toshihiro Asai
Toshihiro Asai 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: 5529652Abstract: A continuous FRTP prepreg manufacturing apparatus comprises an extruder, a crosshead having a main body internally provided with a resin chamber for containing a molten thermoplastic resin extruded therein by the extruder and joined to the discharge end of the extruder, a cooling unit disposed outside and near the exit of the main body of the crosshead, and a winding unit for taking up a prepreg. A fiber bundle inlet unit and a fiber bundle outlet nozzle unit are provided respectively at one end and at the other end of the main body of the crosshead. Guide rollers and impregnating rollers are arranged within the main body of the crosshead so that a tension is applied to the fiber bundle during impregnation or so that the fiber bundle is expanded during impregnation and is condensed after impregnation.Type: GrantFiled: January 22, 1992Date of Patent: June 25, 1996Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Toshihiro Asai, Toshio Ohara, Tatuya Tanaka, Shinji Hashizume
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Patent number: 5296942Abstract: An appratus for inspecting lightness on the surface of an object having at least first and second surface portions different in lightness, wherein an image of the first and second surface portions of the object are taken under appropriate illumination, the taken image is memorized, first and second reference lightness of the first and second surface portions are defined respectively, whether or not each pixel of the taken image belongs to either one of pixel regions defining the first and second surface portions are determined in accordance with values defining preliminarily memorized pixel regions respectively, lightness difference between each pixel of the taken image corresponding to the first surface portion and the first reference lightness is calculated, lightness difference between each pixel of the taken image corresponding to the second surface portion and said second reference lightness are calculated, and quality in lightness on the surface of the object are determined on a basis of the respectiveType: GrantFiled: January 9, 1992Date of Patent: March 22, 1994Assignee: Nippondenso Co., Ltd.Inventors: Yoshio Yokoyama, Takashi Hieda, Toshihiro Asai
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Patent number: 5262221Abstract: A thermosensitive stencil paper contains a main component layer formed of a thermoplastic film and an ink-permeable support bonded together with adhesive, in which the ink-permeable support is a porous thin paper containing polynosic fibers as the main fibrous component. Optionally, the thermosensitive stencil paper has a plastic film layer whose surface is coated with a mold release layer containing as a main component a silicone oil having a kinematic viscosity of 500,000 cs or more. The transfer operation of the stencil paper in an automatic printer is excellent and its ink feeding performance during printing is high because of the polynosic fiber-containing porous thin paper support. Nonprinted spot defects are reduced because of the small number of bundled fibers in the stencil paper. Stencil paper containing the mold release layer are free of offsetting when rolled and cause no sticking for a long period of time, thereby providing thermosensitive stencil paper with excellent performance.Type: GrantFiled: December 6, 1991Date of Patent: November 16, 1993Assignee: Kohjin Co., Ltd.Inventors: Yukihiro Terada, Toshihiro Asai, Masaki Murasawa
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Patent number: 5044760Abstract: A closed type kneader has two rotors rotatably mounted in a casing for rotation about parallel axes. Two blades extend from each of the rotors such that the blades of the rotors intermesh. Each rotor has both a main blade and an auxiliary blade. The auxiliary blade has a length not less than one-half of the length of the rotor and an angle of torsion not smaller than 0.degree. in the same direction as the angle of torsion of the main blade. The rotors are rotated in synchronism with one another so that the main blade tip of each rotor may be in phase with the auxiliary blade tip of the other rotor at the axial centers of the rotors.Type: GrantFiled: September 8, 1989Date of Patent: September 3, 1991Assignee: Kabushiki Kaisha Kobe Seiko ShoInventor: Toshihiro Asai
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Patent number: 4859074Abstract: A closed mixing machine includes a pair of nonintermeshed rotors rotatable in chambers at a predetermined differential rotation ratio and having respective rotor tips set at a predetermined differential phase angle. The predetermined differential rotation ratio is set to be 1.0 and the predetermined differential phase angle is set to be 0 to 45 degrees so that the mixing machine performs improved macro-dispersion.Type: GrantFiled: August 6, 1987Date of Patent: August 22, 1989Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Toshihiro Asai, Katsunobu Hagiwara
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Patent number: 4718771Abstract: A closed mixing machine suitable for mixing rubber materials, which includes a closed mixing chamber and a pair of rotors received in the chamber for rotating in opposite directions, wheren the rotor tips' clearance and the rotor rotation speed are increased up to values greater than typical values of the conventional mixing machine. Accoridng to this arrangement, mixing productivity is increased by a maximum of 70% with the even discharge temperature and energy consumption is reduced in comparison with the conventional machine.Type: GrantFiled: August 15, 1986Date of Patent: January 12, 1988Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Toshihiro Asai, Katsunobu Hagiwara
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Patent number: 4456381Abstract: Disclosed is a closed type mixing and kneading apparatus with two juxtaposed double-wing rotors providing increased mixing and increased shearing action. One of the wings of each rotor has a length ratio of 0.6 to 0.9 relative to the total length of the rotor at a twist angle of 10.degree. to 40.degree.. The two wings of each rotor are overlapped by between 0.2 and 0.8 times the total length of the rotor.Type: GrantFiled: February 17, 1981Date of Patent: June 26, 1984Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Kimio Inoue, Tsugushi Fukui, Toshihiro Asai, Kazuhiko Nakagawa, Akimasa Kuriyama
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Patent number: 4332481Abstract: A continuous mixing machine for mixing a material fed at one end and discharging the mixed material through a discharge orifice at another end in a continuous sequence which includes a plurality of rotors each provided with mixing blade members, a mixing chamber encircling the plurality of rotors and a throttle member defining a part of the mixing chamber at a position facing the blade members and adapted to be moved toward and away from the rotors so as to vary the space within the mixing chamber. In a modified machine, the mixing chamber is provided with a vent hole at a position intermediate the throttle member and discharge orifice.Type: GrantFiled: March 27, 1980Date of Patent: June 1, 1982Assignee: Kobe Steel, Ltd.Inventors: Kimio Inoue, Katsumi Ogawa, Tsugushi Fukui, Toshihiro Asai, Shinji Hashizume
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Patent number: 4300838Abstract: An internal mixer includes a pair of rotors each having spiral vanes adapted to advance materials in the axial direction of the rotors. More particularly, each of the respective rotors has a long vane and a short vane and each of the vanes is of a spiral direction. The spiraling or screwing direction of the long vane is the same as the screwing direction of the short vane on the respective rotors. The flow of the materials along the axial direction differs from one rotor to another. Also disclosed is a mixing and kneading machine including a pair of parallel rotors each having a long vane and a short vane, the long vane extending spirally about the center lines of the rotors and the short vane extending along the center lines of the rotors. Flowing behavior of material to be mixed and kneaded occurs in opposing directions between both rotors.Type: GrantFiled: June 22, 1979Date of Patent: November 17, 1981Assignees: Bridgestone Tire Co., Ltd., Kobe Steel, Ltd.Inventors: Norimoto Sato, Minoru Miyaoka, Shin Yamasaki, Kimio Inoue, Akimasa Kuriyama, Tsugushi Fukui, Toshihiro Asai
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Patent number: 4284358Abstract: A mixing and kneading machine including a pair of parallel rotors each having a long vane and a short vane, both of which extend spirally about the center line of the rotors. A length ratio of the short vanes to the long vanes is selected within a range of 0.48 to 0.1. Also described is a mixing and kneading device which has a pair of parallel rotors rotating in opposite directions within a mixing chamber defined by a casing and an end frame. Each of the rotors comprises a long vane and a short vane, both of which extend spirally about the center line of the rotor, the spiral direction thereof being selected such that material to be mixed flows from the edges of the rotors into the central portion thereof. The ratio of the length of the short vane to that of the long vane is determined within the range of 0.48 to 0.1 and a ratio of axial thrust exerted on the material by the short vane to that by the long vane is determined between 0.7 and approximately 0.Type: GrantFiled: June 22, 1979Date of Patent: August 18, 1981Assignees: Bridgestone Tire Co., Ltd., Kobe Steel, Ltd.Inventors: Norimoto Sato, Minoru Miyaoka, Shin Yamasaki, Kimio Inoue, Akimasa Kuriyama, Tsugushi Fukui, Toshihiro Asai, Kazuhiko Nakagawa, Tatuo Masaki