Patents by Inventor Tokio Sakauchi
Tokio Sakauchi 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: 9688090Abstract: An identification medium can be used in an opening label, clearly show signs of it having been opened, and also have a superior authenticity-confirming function. The identification medium has a structure including, in the following order as seen from the side of observation: an optical function layer that generates a color shift, a separation layer that is partially formed, a printed layer, and an adhesive layer, in which when an adhesive strength between the adhesive layer and an adherend is set to be Xa, an adhesive strength between the adhesive layer and the printed layer is set to be Xb, and an adhesive strength at a portion in which the separation layer is laminated between the optical function layer and the printed layer is set to be Xc, the adhesive strength of each part is set to satisfy Xa>Xb>Xc or Xb>Xa>Xc.Type: GrantFiled: October 2, 2013Date of Patent: June 27, 2017Assignee: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Tooru Ida, Shinei Suzuki
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Publication number: 20150323898Abstract: An identification medium can be used in an opening label, clearly show signs of it having been opened, and also have a superior authenticity-confirming function. The identification medium has a structure including, in the following order as seen from the side of observation: an optical function layer that generates a color shift, a separation layer that is partially formed, a printed layer, and an adhesive layer, in which when an adhesive strength between the adhesive layer and an adherend is set to be Xa, an adhesive strength between the adhesive layer and the printed layer is set to be Xb, and an adhesive strength at a portion in which the separation layer is laminated between the optical function layer and the printed layer is set to be Xc, the adhesive strength of each part is set to satisfy Xa>Xb>Xc or Xb>Xa>Xc.Type: ApplicationFiled: October 2, 2013Publication date: November 12, 2015Inventors: Hidekazu HOSHINO, Itsuo TAKEUCHI, Tokio SAKAUCHI, Tooru IDA, Shinei SUZUKI
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Patent number: 8970953Abstract: An identification medium is provided in which latent image having plural colors can be observed even when the identification medium is spaced away from a polarization filter. A cholesteric liquid crystal layer is provided as a specific polarization light reflection layer which reflects light having a specific polarized condition. An optical anisotropic layer having an optical anisotropy is provided at an upper position overlapping with the specific polarization light reflection layer. An image A fanned by an area having an optical anisotropy different from that of surroundings is formed at the optical anisotropic layer. When the identification medium is directly viewed, the influence of the optical anisotropy cannot be seen. When the identification medium is observed via a circular polarization filter, the image can be seen to have a specific color by the influence of the optical anisotropy.Type: GrantFiled: November 12, 2010Date of Patent: March 3, 2015Assignee: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Seiya Shibuya, Tohru Ida
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Patent number: 8915437Abstract: A technique detects counterfeit products having appearances similar to authentic products with high accuracy. A cholesteric liquid crystal layer in which hologram is processed and circularly polarized light of primary rotating direction having specific central wavelength can be selectively reflected and a code forming layer in which code printed pattern that is an objective of reading is formed, are arranged in this order seen from a side from which reading is performed. The hologram image that inhibits reading of information of the code while an optical reading device reads it together with the code, and it is formed by the hologram processing.Type: GrantFiled: June 29, 2011Date of Patent: December 23, 2014Assignee: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Tohru Ida
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Patent number: 8749750Abstract: A discrimination medium, which can have much information, can be produced on a small scale at low cost, and enables change of a sticker design at low cost, is provided. The discrimination medium includes an optically transparent first substrate on which a cholesteric liquid crystal layer is formed, the cholesteric liquid crystal layer being formed with a fine asperity used for displaying a hologram, an optically transparent second substrate on which a print layer is formed, the print layer having a predetermined pattern made of ink and having a transparent portion without the ink of the pattern around the pattern, the pattern reflecting or absorbing a light of a predetermined wavelength, and a transparent adhesive layer, wherein the optically transparent first substrate, the optically transparent second substrate, and the transparent adhesive layer, are disposed in turn from a side checked visually.Type: GrantFiled: March 15, 2013Date of Patent: June 10, 2014Assignee: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Tokio Sakauchi, Mutsumi Sasaki, Tohru Ida, Naomi Iida
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Publication number: 20130105076Abstract: A method for production of an identification medium, includes a forming step in which a code printed pattern is formed by printing; and a joining step in which the code printed pattern and a cholesteric liquid crystal layer are joined; wherein the identification medium includes, in order, seen from an observing side: a cholesteric liquid crystal layer, in which a hologram is processed and right circularly polarized light ?/4 plate and a linearly polarizing filter from the observing side, in which left circularly polarized light selectively penetrates toward the cholesteric liquid crystal layer when natural light enters from the opposite side to the cholesteric liquid crystal layer side; and a code printed pattern, in which a two-dimensional codes is formed.Type: ApplicationFiled: June 29, 2011Publication date: May 2, 2013Applicant: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Tohru Ida
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Publication number: 20130099000Abstract: A technique detects counterfeit products having appearances similar to authentic products with high accuracy. A cholesteric liquid crystal layer in which hologram is processed and circularly polarized light of primary rotating direction having specific central wavelength can be selectively reflected and a code forming layer in which code printed pattern that is an objective of reading is formed, are arranged in this order seen from a side from which reading is performed. The hologram image that inhibits reading of information of the code while an optical reading device reads it together with the code, and it is formed by the hologram processing.Type: ApplicationFiled: June 29, 2011Publication date: April 25, 2013Applicant: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Tohru Ida
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Patent number: 8421987Abstract: A discrimination medium, which can have much information, can be produced on a small scale at low cost, and enables change of a sticker design at low cost, is provided. A cholesteric liquid crystal layer, having a fine asperity for forming a hologram, is formed on a transparent first substrate. A print layer composed of a black ink is formed on a transparent second substrate. The substrates are affixed to each other via a bond layer, so that a discrimination medium is obtained. In the discrimination medium, the display content obtained by the print layer is changed, so that the display content for discrimination can be changed at low cost.Type: GrantFiled: November 14, 2008Date of Patent: April 16, 2013Assignee: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Tokio Sakauchi, Mutsumi Sasaki, Tohru Ida, Naomi Iida
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Patent number: 8322753Abstract: An identification medium is to be observed via a linearly polarizing filter and includes a first liquid crystal layer that changes the wavelength of light according to the rotational angle of the linearly polarizing filter, a cholesteric liquid crystal layer, and a light absorbing layer that is provided below the cholesteric liquid crystal layer.Type: GrantFiled: October 18, 2007Date of Patent: December 4, 2012Assignees: NHK Spring Co., Ltd., Nippon Oil CorporationInventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Suzushi Nishimura, Gorou Suzaki
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Patent number: 8297522Abstract: Provided is a multilayer reflector about which a complicated step is not required when the molecular alignment of a retardation film is partially relaxed to form a latent image of authentication information, and about which the latent image is not made visible by the generation of unevenness in the surface. A multilayer reflector 1 has a retardation film 10 in which the phase difference ?nd1 to an observation wavelength ? is set to be m×?/4??/16??nd1?m×?/4+?/16 wherein m is a positive odd number, and a metallic reflector 11 laminated on the rear face side of this retardation film 10, wherein an authentication region 10a where predetermined authentication information is beforehand formed in the retardation film 10 is formed to give a phase difference ?nd2 set to be n×?/4??/8 ??nd2?n×?/4+?/8 wherein n is 0 or a positive even number provided that n<m, and further a light diffusing layer 12 is formed on the front face side of the retardation film 10.Type: GrantFiled: June 21, 2006Date of Patent: October 30, 2012Assignees: Nitto Denko Corporation, NHK Spring Co., Ltd.Inventors: Seiji Umemoto, Kazuhito Kouno, Kazumasa Shibata, Itsuo Takeuchi, Tokio Sakauchi, Tohru Ida
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Publication number: 20120236292Abstract: An identification medium is provided in which latent image having plural colors can be observed even when the identification medium is spaced away from a polarization filter. A cholesteric liquid crystal layer is provided as a specific polarization light reflection layer which reflects light having a specific polarized condition. An optical anisotropic layer having an optical anisotropy is provided at an upper position overlapping with the specific polarization light reflection layer. An image A formed by an area having an optical anisotropy different from that of surroundings is formed at the optical anisotropic layer. When the identification medium is directly viewed, the influence of the optical anisotropy cannot be seen. When the identification medium is observed via a circular polarization filter, the image can be seen to have a specific color by the influence of the optical anisotropy.Type: ApplicationFiled: November 12, 2010Publication date: September 20, 2012Applicant: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Seiya Shibuya, Tohru Ida
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Patent number: 8231953Abstract: A transparent plastic container which is transparent, allows good design and can be used for an anticounterfeit system that determines authenticity by visual check with the use of polarization property. A transparent plastic sheet of a polystyrene-based resin having a total light transmission of 85% or higher and a haze of 7% or less is subjected to vacuum, pneumatic or vacuum/pneumatic forming at a sheet temperature ranging from a glass transition temperature plus 50 degrees C. to a glass transition temperature plus 130 degrees C., thereby obtaining a transparent plastic container having a planar portion with a strain amount of 150 nm or less.Type: GrantFiled: July 11, 2007Date of Patent: July 31, 2012Assignees: NHK Spring Co., Ltd., RP Topla LimitedInventors: Itsuo Takeuchi, Tokio Sakauchi, Mutsumi Sasaki, Tomoyoshi Sakamoto, Masahiro Arai, Rie Maejima
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Patent number: 7943392Abstract: A discrimination medium cannot be easily falsified. Since the visibility of the discrimination medium is unique, the discrimination medium is superior in determination of the authenticity. The discrimination medium is structured such that a cholesteric liquid crystal layer 106 and a multilayer film 103 having plural light transparent films which are laminated and are different from each other in refraction index are laminated. The reflection light reflected by the discrimination medium includes circular polarization lights which are different in polarization direction, and the discrimination medium has unique optical characteristics. A discrimination method using the above unique optical characteristics, an article to be discriminated by the discrimination medium, and a discrimination apparatus using the above unique optical characteristics are provided.Type: GrantFiled: October 27, 2004Date of Patent: May 17, 2011Assignee: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Susumu Oaku
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Publication number: 20100302486Abstract: A discrimination medium, which can have much information, can be produced on a small scale at low cost, and enables change of a sticker design at low cost, is provided. A cholesteric liquid crystal layer, having a fine asperity for forming a hologram, is formed on a transparent first substrate. A print layer composed of a black ink is formed on a transparent second substrate. The substrates are affixed to each other via a bond layer, so that a discrimination medium is obtained. In the discrimination medium, the display content obtained by the print layer is changed, so that the display content for discrimination can be changed at low cost.Type: ApplicationFiled: November 14, 2008Publication date: December 2, 2010Applicant: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Tokio Sakauchi, Mutsumi Sasaki, Tohru Ida, Naomi Iida
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Patent number: 7812937Abstract: An identifying medium comprises an optical functional layer that is optically identifiable and comprises a layer containing microcapsules. The microcapsule contains a material that occurs color change by breaking the microcapsule.Type: GrantFiled: August 23, 2007Date of Patent: October 12, 2010Assignee: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Tohru Ida, Shinya Nasubida
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Publication number: 20100123943Abstract: Provided is a multilayer reflector about which a complicated step is not required when the molecular alignment of a retardation film is partially relaxed to form a latent image of authentication information, and about which the latent image is not made visible by the generation of unevenness in the surface. A multilayer reflector 1 has a retardation film 10 in which the phase difference ?nd1 to an observation wavelength ? is set to be m×?/4???/16??nd1?m×?/4+?/16 wherein m is a positive odd number, and a metallic reflector 11 laminated on the rear face side of this retardation film 10, wherein an authentication region 10a where predetermined authentication information is beforehand formed in the retardation film 10 is formed to give a phase difference ?nd2 set to be n×?/4??/8??nd2?n×?/4+?/8 wherein n is 0 or a positive even number provided that n<m, and further a light diffusing layer 12 is formed on the front face side of the retardation film 10.Type: ApplicationFiled: June 21, 2006Publication date: May 20, 2010Applicants: NITTO DENKO CORPORATION, NHK SPRING CO., LTD.Inventors: Seiji Umemoto, Kazuhito Kouno, Kazumasa Shibata, Itsuo Takeuchi, Tokio Sakauchi, Tohru Ida
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Publication number: 20100026450Abstract: An identification medium is to be observed via a linearly polarizing filter and includes a first liquid crystal layer that changes the wavelength of light according to the rotational angle of the linearly polarizing filter, a cholesteric liquid crystal layer, and a light absorbing layer that is provided below the cholesteric liquid crystal layer.Type: ApplicationFiled: October 18, 2007Publication date: February 4, 2010Applicants: NHK SPRING CO., LTD., NIPPON OIL CORPORATIONInventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Suzushi Nishimura, Gorou Suzaki
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Publication number: 20100015378Abstract: A transparent plastic container which is transparent, allows good design and can be used for an anticounterfeit system that determines authenticity by visual check with the use of polarization property. A transparent plastic sheet of a polystyrene-based resin having a total light transmission of 85% or higher and a haze of 7% or less is subjected to vacuum, pneumatic or vacuum/pneumatic forming at a sheet temperature ranging from a glass transition temperature plus 50 degrees C. to a glass transition temperature plus 130 degrees C., thereby obtaining a transparent plastic container having a planar portion with a strain amount of 150 nm or less.Type: ApplicationFiled: July 11, 2007Publication date: January 21, 2010Applicant: NHK SPRING CO., LTD.Inventors: Itsuo Takeuchi, Tokio Sakauchi, Mutsumi Sasaki, Tomoyoshi Sakamoto, Masahiro Arai, Rie Maejima
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Publication number: 20090323066Abstract: An identifying medium comprises an optical functional layer that is optically identifiable and comprises a layer containing microcapsules. The microcapsule contains a material that occurs color change by breaking the microcapsule.Type: ApplicationFiled: August 23, 2007Publication date: December 31, 2009Applicant: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Tohru Ida, Shinya Nasubida
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Publication number: 20080138543Abstract: An identification medium 100 comprises an adhesive layer 102, an ink displaying layer 103, a cholesteric liquid crystal layer 106 including a hologram 107, and a transparent protective layer 108. The ink displaying layer 103 comprises a printed layer 104 formed by printing with an ink which includes cholesteric liquid crystals, and a printed layer 105 formed by an ordinary ink. When the printed layer 104 and the printed layer 105 are observed from the front side, the printed layer 104 and the printed layer 105 are formed so as to have the same color. Thus, when the identification medium is tilted, a visual effect is produced in which a figure formed by the printed layer 105 appears.Type: ApplicationFiled: December 21, 2005Publication date: June 12, 2008Applicant: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi