Patents by Inventor Minoru Azakami
Minoru Azakami 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: 11597230Abstract: An object of the present invention is to provide a thin volume hologram sheet to be embedded sufficiently resistant to a mechanical stress such as a stress including a tensile stress, a shear stress and a compression stress at the time of processing even under a heating condition, a forgery prevention paper and a card using the same. The object is achieved by providing a volume hologram sheet to be embedded comprising a volume hologram layer, and a substrate disposed only on one side surface of the volume hologram layer using an adhesion means, wherein a peeling strength of the volume hologram layer and the substrate is 25 gf/25 mm or more.Type: GrantFiled: July 12, 2021Date of Patent: March 7, 2023Assignee: Dai Nippon Printing Co., Ltd.Inventors: Nobuko Oikawa, Minoru Azakami
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Publication number: 20210339555Abstract: An object of the present invention is to provide a thin volume hologram sheet to be embedded sufficiently resistant to a mechanical stress such as a stress including a tensile stress, a shear stress and a compression stress at the time of processing even under a heating condition, a forgery prevention paper and a card using the same. The object is achieved by providing a volume hologram sheet to be embedded comprising a volume hologram layer, and a substrate disposed only on one side surface of the volume hologram layer using an adhesion means, wherein a peeling strength of the volume hologram layer and the substrate is 25 gf/25 mm or more.Type: ApplicationFiled: July 12, 2021Publication date: November 4, 2021Applicant: Dai Nippon Printing Co., Ltd.Inventors: Nobuko Oikawa, Minoru Azakami
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Patent number: 11077698Abstract: An object of the present invention is to provide a thin volume hologram sheet to be embedded sufficiently resistant to a mechanical stress such as a stress including a tensile stress, a shear stress and a compression stress at the time of processing even under a heating condition, a forgery prevention paper and a card using the same. The object is achieved by providing a volume hologram sheet to be embedded comprising a volume hologram layer, and a substrate disposed only on one side surface of the volume hologram layer using an adhesion means, wherein a peeling strength of the volume hologram layer and the substrate is 25 gf/25 mm or more.Type: GrantFiled: April 5, 2019Date of Patent: August 3, 2021Assignee: Dai Nippon Printing Co., Ltd.Inventors: Nobuko Oikawa, Minoru Azakami
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Patent number: 10474099Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: GrantFiled: November 14, 2016Date of Patent: November 12, 2019Assignee: Dai Nippon Printing Co., Ltd.Inventors: Minoru Azakami, Koji Eto, Hiroyuki Ohtaki, Yoshihito Maeno, Sakurako Hatori
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Publication number: 20190232709Abstract: An object of the present invention is to provide a thin volume hologram sheet to be embedded sufficiently resistant to a mechanical stress such as a stress including a tensile stress, a shear stress and a compression stress at the time of processing even under a heating condition, a forgery prevention paper and a card using the same. The object is achieved by providing a volume hologram sheet to be embedded comprising a volume hologram layer, and a substrate disposed only on one side surface of the volume hologram layer using an adhesion means, wherein a peeling strength of the volume hologram layer and the substrate is 25 gf/25 mm or more.Type: ApplicationFiled: April 5, 2019Publication date: August 1, 2019Inventors: Nobuko OIKAWA, Minoru AZAKAMI
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Patent number: 9709952Abstract: The present invention is to provide: a photosensitive composition for volume hologram recording and a photosensitive substrate for volume hologram recording, which provide increased sensitivity during hologram recording and a high refractive index modulation amount, and which do not inhibit the decolorization of the sensitizing dye; and a volume hologram recorded medium which provides high-luminance hologram images with increased productivity.Type: GrantFiled: August 22, 2013Date of Patent: July 18, 2017Assignee: DAI NIPPON PRINTING CO., LTD.Inventors: Minoru Azakami, Koji Eto, Nobuko Oikawa, Eriko Hamade, Keisuke Miura
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Publication number: 20170157971Abstract: An object of the present invention is to provide a thin volume hologram sheet to be embedded sufficiently resistant to a mechanical stress such as a stress including a tensile stress, a shear stress and a compression stress at the time of processing even under a heating condition, a forgery prevention paper and a card using the same. The object is achieved by providing a volume hologram sheet to be embedded comprising a volume hologram layer, and a substrate disposed only on one side surface of the volume hologram layer using an adhesion means, wherein a peeling strength of the volume hologram layer and the substrate is 25 gf/25 mm or more.Type: ApplicationFiled: February 17, 2017Publication date: June 8, 2017Inventors: Nobuko OIKAWA, Minoru AZAKAMI
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Publication number: 20170060087Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: ApplicationFiled: November 14, 2016Publication date: March 2, 2017Inventors: Minoru AZAKAMI, Koji ETO, Hiroyuki OHTAKI, Yoshihito MAENO, Sakurako HATORI
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Patent number: 9529324Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: GrantFiled: February 25, 2014Date of Patent: December 27, 2016Assignee: DAI NIPPON PRINTING CO., LTD.Inventors: Minoru Azakami, Koji Eto, Hiroyuki Ohtaki, Yoshihito Maeno, Sakurako Hatori
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Patent number: 9213311Abstract: The present invention provides a volume hologram transfer foil which has good foil cutting characteristics and is used to manufacture a volume hologram laminate by transferring a volume hologram layer to an adherend by thermocompression. The volume hologram transfer foil includes a base material, a protective layer, a volume hologram layer, and a heat seal layer, wherein the protective layer contains a hard coat component, a rupture elongation control component, and a foil cutting characteristic control component which has a thermal expansion coefficient different from those of the hard coat component and rupture elongation control component and is incompatible with the two components.Type: GrantFiled: July 13, 2011Date of Patent: December 15, 2015Assignee: DAI NIPPON PRINTING CO., LTD.Inventors: Dai Tsukada, Koji Eto, Nobuko Oikawa, Minoru Azakami, Takaki Miyachi, Shinya Sato
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Publication number: 20150212487Abstract: The present invention is to provide: a photosensitive composition for volume hologram recording and a photosensitive substrate for volume hologram recording, which provide increased sensitivity during hologram recording and a high refractive index modulation amount, and which do not inhibit the decolorization of the sensitizing dye; and a volume hologram recorded medium which provides high-luminance hologram images with increased productivity.Type: ApplicationFiled: August 22, 2013Publication date: July 30, 2015Inventors: Minoru Azakami, Koji Eto, Nobuko Oikawa, Eriko Hamade, Keisuke Miura
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Patent number: 8861056Abstract: A major object of the present invention is to provide a volume hologram transfer foil that gives a volume hologram laminate higher in antiforgery function. The present invention achieves the object by providing a volume hologram transfer foil comprising: a substrate, a volume hologram layer carrying a recorded volume hologram that is formed on the substrate, and an image forming layer carrying a formed image and a heat seal layer containing a thermoplastic resin that are formed on the volume hologram layer, and comprising no reflective layer having a function to reflect light.Type: GrantFiled: September 11, 2013Date of Patent: October 14, 2014Assignee: Dai Nippon Printing Co., Ltd.Inventors: Koji Eto, Minoru Azakami, Kazutoshi Awano, Kenji Ueda
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Patent number: 8852828Abstract: This invention provides a volume hologram photosensitive composition, which can realize a hologram having an excellent brightness and, at the same time, having excellent heat resistance and mechanical strength, and a photosensitive medium for volume hologram recording using the volume hologram photosensitive composition. The volume hologram photosensitive composition comprises at least a photopolymerizable monomer, a photopolymerization initiator, a sensitizing dye for sensitizing the initiator, and a binder resin. The binder resin comprises a heat curing resin, and optionally a thermoplastic resin, and the thermoplastic resin is contained in an amount of 0 to 25% by weight based on the total solid content of the photosensitive composition.Type: GrantFiled: July 5, 2006Date of Patent: October 7, 2014Assignee: Dai Nippon Printing Co., Ltd.Inventors: Minoru Azakami, Yoshihito Maeno, Hiroyuki Ohtaki
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Publication number: 20140240805Abstract: A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: ApplicationFiled: February 25, 2014Publication date: August 28, 2014Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Minoru AZAKAMI, Koji ETO, Hiroyuki OHTAKI, Yoshihito MAENO, Sakurako HATORI
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Patent number: 8697314Abstract: A method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. The method uses a volume hologram forming substrate which includes: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound. The producing method includes processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound.Type: GrantFiled: February 28, 2008Date of Patent: April 15, 2014Assignee: Dai Nippon Printing Co., Ltd.Inventors: Minoru Azakami, Koji Eto, Hiroyuki Ohtaki, Yoshihito Maeno, Sakurako Hatori
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Publication number: 20140016167Abstract: A major object of the present invention is to provide a volume hologram transfer foil that gives a volume hologram laminate higher in antiforgery function. The present invention achieves the object by providing a volume hologram transfer foil comprising: a substrate, a volume hologram layer carrying a recorded volume hologram that is formed on the substrate, and an image forming layer carrying a formed image and a heat seal layer containing a thermoplastic resin that are formed on the volume hologram layer, and comprising no reflective layer having a function to reflect light.Type: ApplicationFiled: September 11, 2013Publication date: January 16, 2014Applicant: Dai Nippon Printing Co., Ltd.Inventors: Koji ETO, Minoru AZAKAMI, Kazutoshi AWANO, Kenji UEDA
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Patent number: 8559084Abstract: A major object of the present invention is to provide a volume hologram transfer foil that gives a volume hologram laminate higher in antiforgery function. The present invention achieves the object by providing a volume hologram transfer foil comprising: a substrate, a volume hologram layer carrying a recorded volume hologram that is formed on the substrate, and an image forming layer carrying a formed image and a heat seal layer containing a thermoplastic resin that are formed on the volume hologram layer, and comprising no reflective layer having a function to reflect light.Type: GrantFiled: June 17, 2008Date of Patent: October 15, 2013Assignee: Dai Nippon Printing Co., Ltd.Inventors: Koji Eto, Minoru Azakami, Kazutoshi Awano, Kenji Ueda
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Publication number: 20130182301Abstract: A primary object of the invention is to provide a volume hologram transfer foil which has good foil cutting characteristics and is used to manufacture a volume hologram laminate by transferring a volume hologram layer to an adherend by thermocompression. The above problem is solved by a volume hologram transfer foil comprising a base material, a protective layer formed on the base material, a volume hologram layer formed on the protective layer and having a volume hologram recorded, and a heat seal layer formed on the volume hologram layer, wherein the protective layer contains a hard coat component formed of an ionizing radiation-curable resin, a rupture elongation control component which improves the rupture elongation of the protective layer, and a foil cutting characteristic control component which has a thermal expansion coefficient different from those of the hard coat component and rupture elongation control component and is incompatible with the two components.Type: ApplicationFiled: July 13, 2011Publication date: July 18, 2013Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Dai Tsukada, Koji Eto, Nobuko Oikawa, Minoru Azakami, Takaki Miyachi, Shinya Sato
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Publication number: 20120286504Abstract: An object of the present invention is to provide a thin volume hologram sheet to be embedded sufficiently resistant to a mechanical stress such as a stress including a tensile stress, a shear stress and a compression stress at the time of processing even under a heating condition, a forgery prevention paper and a card using the same. The object is achieved by providing a volume hologram sheet to be embedded comprising a volume hologram layer, and a substrate disposed only on one side surface of the volume hologram layer using an adhesion means, wherein a peeling strength of the volume hologram layer and the substrate is 25 gf/25 mm or more.Type: ApplicationFiled: January 18, 2011Publication date: November 15, 2012Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Nobuko Oikawa, Minoru Azakami
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Patent number: 8134660Abstract: The present invention provides an optical diffusion device, which can exhibit discontinuously different optical properties only in desired regions without creating any difference in grades and/or breaks, facilitate control of the optical diffusion properties, and prevent the occurrence of the stray light, as well as provides a projection screen and a design member, both using the optical diffusion device. An exemplary optical diffusion device according to this invention includes a base, and a cholesteric liquid crystal polymer layer provided on the base and composed of a plurality of diffusion regions arranged on a plane. A diffusion angle of one of the diffusion regions (e.g., first diffusion regions) of the cholesteric liquid crystal polymer layer is different from a diffusion angle of another of the diffusion regions (e.g., second diffusion regions).Type: GrantFiled: March 13, 2007Date of Patent: March 13, 2012Assignee: Dai Nippon Printing Co., Ltd.Inventors: Masanori Umeya, Masachika Watanabe, Minoru Azakami