Patents Assigned to Satiko Okazaki
-
Patent number: 5543017Abstract: An atmospheric pressure glow discharge plasma treatment method, in which a gaseous mixture comprising argon, argon and helium, or argon and hydrogen, mixed with water vapor or water vapor and ketones at room temperature or a specified temperature, is introduced into a plasma reactor having a dielectric-coated electrode comprising a solid dielectric disposed on the surface of at least one of opposing electrodes, and a high-frequency voltage is applied under atmospheric pressure to generate atmospheric pressure glow discharge and excite a plasma, thereby making surface treatment of plastics or fibers disposed between the electrodes.Type: GrantFiled: April 24, 1995Date of Patent: August 6, 1996Assignees: E.C. Chemical Co., Ltd., Satiko Okazaki, Masuhiro KogomaInventors: Hiroshi Uchiyama, Masuhiro Kogoma, Satiko Okazaki
-
Patent number: 5529631Abstract: A length of sheet material is continuously surface treated, typically modified or coated, by continuously feeding helium gas or a helium gas mixture into a treating chamber while a plasma region is created in the gas under atmospheric pressure, continuously moving a length of sheet material into and out of the chamber through entrance and exit ports to pass through the plasma region, thereby continuously subjecting the sheet at either surface to plasma discharge treatment. The entrance and exit ports are sealed in a less gas tight manner to allow leakage of the helium gas or gas mixture.Type: GrantFiled: August 9, 1995Date of Patent: June 25, 1996Assignees: Bridgestone Corporation, Satiko Okazaki, Masuhiro KogomaInventors: Masato Yoshikawa, Yukihiro Kusano, Hideyuki Niwa, Yukio Fukuura, Kazuo Naito, Satiko Okazaki, Masuhiro Kogoma
-
Patent number: 5425832Abstract: Tightly integrated composite products are obtained by treating a fluoropolymer member on its surface with atmospheric pressure glow discharge plasma in a helium gas atmosphere containing 97% by volume or more of helium gas, and joining another member of rubber compositions, resins, metals, ceramics, or semiconductors to the surface treated fluoropolymer member. By using a fluoropolymer sheet as the fluoropolymer member and a metal or synthetic resin layer as the other member, there are obtained weather-resistant composite sheets in which the layer is firmly bonded to the fluoropolymer sheet.Type: GrantFiled: October 30, 1992Date of Patent: June 20, 1995Assignees: Bridgestone Corporation, Satiko Okazaki, Masuhiro KogomaInventors: Yukihiro Kusano, Masato Yoshikawa, Itsuo Tanuma, Yukio Fukuura, Kazuo Naito, Yasuhiro Morimura, Satiko Okazaki, Masuhiro Kogoma
-
Patent number: 5399832Abstract: A grounded electrode and a high-voltage applying electrode, each obtained by covering a metal electrode with a dielectric are housed at least within a reactor apparatus. A rare gas can be introduced in the apparatus by way of a gas delivery tube, and a monomer gas can be admitted in the apparatus by way of a gas delivery tube. An additional gas may also be introduced in the apparatus by way of a gas delivery tube. The employed gases may be discharged from within the reactor by way of a discharge tube. Powders are charged in the apparatus with a rare gas, monomer gas, or combination thereof and, optionally, additional gases may be included, the gas components being selected based upon what type of electrical power is to be treated. Powers ape supplied to the electrodes to induce atmospheric-pressure plasma reactions, thereby modifying or enhancing the characteristics of the powders.Type: GrantFiled: August 3, 1992Date of Patent: March 21, 1995Assignees: Kimoto Co., Ltd., Kimoto Tech, Inc., Satiko Okazaki, Masuhiro KogomaInventors: Tatsuzo Tanisaki, Satiko Okazaki, Masuhiro Kogoma
-
Patent number: 5340618Abstract: A method is disclosed for the treatment of a powder by use of a plasma reactor under atmospheric pressure, comprising the steps of providing a reaction chamber having first and second electrodes covered with a dielectric, an upper gas exhaust means and a lower gas inlet means, feeding a fluidizing gas comprising a rare gas, a monomer gas or a mixture thereof through said gas inlet means into said chamber to agitate a powder to be treated in said chamber, concurrently removing said gas from said chamber through said gas exhaust means; and generating a glow plasma under atmospheric pressure in said chamber by applying a voltage to said first electrode and grounding said second electrode whereby said powder is provided with an anticorrosive surface treatment.Type: GrantFiled: July 21, 1992Date of Patent: August 23, 1994Assignees: Kimoto Co., Ltd., Kimoto Tech, Inc., Satiko Okazaki, Masuhiro KogomaInventors: Tatsuzo Tanisaki, Satiko Okazaki, Masuhiro Kogoma
-
Patent number: 5316739Abstract: Disclosed herein is a method for surface treatment which comprises subjecting an object for surface treatment to an atmospheric pressure plasma while rolling or floating said object in an insulating vessel fed with a prescribed gas and provided on the outside thereof or on both the outside and inside thereof with electrodes for voltage application and grounding, said atmospheric pressure plasma occurring upon application of a voltage to said electrodes. This method permits simple, certain, and uniform surface treatment of any objects in the form of lump or sphere. The surface treatment by the atmospheric pressure plasma does not need the apparatus to be evacuated. Therefore, it can be carried out in a simple apparatus without causing the object for surface treatment to release volatile matters.Disclosed also herein is a method for the surface treatment of vulcanized rubber with an atmospheric pressure plasma in the presence of an oxygen-containing gas and halogen containing gases.Type: GrantFiled: August 19, 1992Date of Patent: May 31, 1994Assignees: Bridgestone Corporation, Satiko Okazaki, Masuhiro KogomaInventors: Masato Yoshikawa, Yukihiro Kusano, Setsuo Akiyama, Kazuo Naito, Satiko Okazaki, Masuhiro Kogoma
-
Patent number: 5290378Abstract: A method for preparing a rubber-based composite material by joining a base material and a rubber composition together by heat pressure bonding can achieve strong bonding without using any adhesives, wherein a monomer is polymerized by atmospheric-pressure glow discharge plasma technique to form a polymerized film having unsaturated bonds on the surface of the base material and then the rubber composition is bonded to said polymerized film by heat pressure bonding to join the base material and the rubber together.Type: GrantFiled: February 21, 1991Date of Patent: March 1, 1994Assignees: Bridgestone Corporation, Satiko Okazaki, Masahiro KogomaInventors: Yukihiro Kusano, Masato Yoshikawa, Kazuo Naito, Satiko Okazaki, Masahiro Kogoma
-
Patent number: 5286532Abstract: Disclosed herein is a method for producing golf balls which comprises surface-treating a golf ball with atmospheric pressure plasma prior to finish coating. The resulting golf balls have a coating film which is in good adhesion to the golf ball and highly resistant to discoloration and deterioration by heat, moisture, and light. The surface treatment is by the atmospheric pressure plasma which does not need the treating apparatus to be evacuated. The surface treatment under atmospheric pressure requires only a simple treating apparatus and can be applied to any golf balls without evaporating volatile matters contained therein.Type: GrantFiled: August 19, 1992Date of Patent: February 15, 1994Assignees: Bridgestone Corporation, Satiko Okazaki, Masuhiro KogomaInventors: Masato Yoshikawa, Yukihiro Kusano, Kazuo Naito, Satiko Okazaki, Masuhiro Kogoma
-
Patent number: 5225659Abstract: A surface treating apparatus which comprises a hollow cylindrical electrode and a counter electrode provided within the hollow cylindrical electrode, and a power supply for applying a potential between the electrode and the counter electrode to cause an atmospheric pressure plasma in the presence of a selected gas to generate within the cylindrical electrode is described. A method is also described, wherein a material to be treated is placed between the electrodes and a potential is applied therebetween to generate the plasma to effect the surface treatment of the material. The method and apparatus are very effective for surface treatment of axially symmetric substrates in the form of bars, tubes or fibers.Type: GrantFiled: April 10, 1992Date of Patent: July 6, 1993Assignees: Bridgestone Corporation, Satiko Okazaki, Masuhiro KogomaInventors: Yukihiro Kusano, Masato Yoshikawa, Kazuo Naito, Satiko Okazaki, Masuhiro Kogoma
-
Patent number: 5124173Abstract: According to this invention, there is provided an atmospheric pressure plasma surface treatment process comprising the steps of introducing a gas in a plasma reaction apparatus having a pair of dielectric-covered electrodes having opposing surfaces on at least one of which is provided with a solid dielectric; performing plasma excitation under atmospheric pressure; and surface treating an object placed between the opposing electrodes, wherein the gas introduced is a gaseous composition consisting essentially of argon, helium and/or ketone. This process makes it possible to quickly imparting hydrophilic nature to surfaces of an object made of a plastic to be treated. The hydrophilic nature given lasts long.Type: GrantFiled: July 17, 1991Date of Patent: June 23, 1992Assignees: E. C. Chemical Co., Ltd., C. Itoh Fine Chemical Co., Ltd., Satiko Okazaki, Masuhiro KogomaInventors: Hiroshi Uchiyama, Satiko Okazaki, Masuhiro Kogoma
-
Patent number: 5041304Abstract: Plates, sheets, fibers and other articles can be rendered water repellent by subjecting the articles at their surface to a glow discharge plasma under atmospheric pressure. The treating gas is a mixture of an inert gas and a fluorinated compound in the form of a cyclic or unsaturated hydrocarbon having some or all of the hydrogen atoms thereof replaced by halogen groups including fluorine atoms. The surface treatment lowers the surface energy of the articles in a long lasting manner.Type: GrantFiled: December 10, 1990Date of Patent: August 20, 1991Assignees: Bridgestone Corporation, Satiko Okazaki, Masuhiro KogomaInventors: Yukihiro Kusano, Masato Yoshikawa, Kazuo Naito, Yukio Fukuura, Satiko Okazaki, Masuhiro Kogoma