Patents by Inventor Masumi Nishizawa
Masumi Nishizawa 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: 6140268Abstract: A thermal transfer image receiving sheet is provided which causes none of offset of an antistatic agent, transfer of the antistatic agent onto a carrier roll of a thermal transfer printer, a lowering in whiteness of the thermal transfer image receiving sheet, and a remarkable lowering in coating strength under high humidity environment and possesses excellent and stable antistatic properties. The thermal transfer image receiving sheet comprises: a substrate sheet; a dye-receptive layer provided on at least one side of the substrate sheet; and a conductive layer as at least one layer provided between the substrate sheet and the receptive layer or as at least one layer provided on the substrate sheet in its side remote from the receptive layer. The conductive layer contains a conductive needle crystal.Type: GrantFiled: August 31, 1998Date of Patent: October 31, 2000Assignee: Dai Nippon Printing Co., Ltd.Inventors: Masayasu Yamazaki, Koichi Shirai, Masumi Nishizawa
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Patent number: 5672563Abstract: The present invention provides a thermal transfer image-receiving sheet capable of forming an image excellent in various types of fastness, particularly in light fastness, maintaining the effect of the ultraviolet absorber during the storage without deterioration and stably existing within a dye-receiving layer through the use of a thermal transfer process wherein use is made of a sublimable dye. The thermal transfer image-receiving sheet of the present invention includes a substrate sheet and a dye-receiving layer formed on at least one surface of the substrate sheet, wherein a layer containing an ultraviolet absorber is provided between the substrate sheet and the dye-receiving layer.Type: GrantFiled: May 21, 1996Date of Patent: September 30, 1997Assignee: Dai Nippon Printing Co., Ltd.Inventors: Ryohei Takiguchi, Hitoshi Saito, Masumi Nishizawa
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Patent number: 5607808Abstract: A liquid toner and an ink composition, which comprise a dispersion of copolymer resin particles composed of at least two different monomer components in a dispersion medium. The copolymer resin particles and the dispersion medium are related to each other such that the difference .DELTA..delta..sup.1 between the solubility parameter value .delta.p.sup.1 of a homopolymer composed only of at least one monomer component in the copolymer resin and the solubility parameter value .delta.s.sup.1 of the dispersion medium is not smaller than 1.0, and that the difference .DELTA..delta..sup.2 between the solubility parameter value .delta.p.sup.2 of a homopolymer composed only of at least one other monomer component and the solubility parameter value .delta.s.sup.1 of the dispersion medium is not larger than 1.0, and further that the difference .DELTA. between .DELTA..delta..sup.1 and .DELTA..delta..sup.2 (.DELTA..delta..sup.1 -.DELTA..delta..sup.2) is at least 0.5.Type: GrantFiled: June 5, 1996Date of Patent: March 4, 1997Assignee: Dai Nippon Printing Co., Ltd.Inventors: Masumi Nishizawa, Masayuki Iijima, Takashi Miyama
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Patent number: 5547804Abstract: A liquid toner and an ink composition, which comprise a dispersion of copolymer resin particles composed of at least two different monomer components in a dispersion medium. The copolymer resin particles and the dispersion medium are related to each other such that the difference .DELTA..delta..sup.1 between the solubility parameter value .delta.p.sup.1 of a homopolymer composed only of at least one monomer component in the copolymer resin and the solubility parameter value .delta.s.sup.1 of the dispersion medium is not smaller than 1.0, and that the difference .DELTA..delta..sup.2 between the solubility parameter value .delta.p.sup.2 of a homopolymer composed only of at least one other monomer component and the solubility parameter value .delta.s.sup.1 of the dispersion medium is not larger than 1.0, and further that the difference .DELTA. between .DELTA..delta..sup.1 and .DELTA..delta..sup.2 (.DELTA..delta..sup.1 -.DELTA..delta..sup.2) is at least 0.5.Type: GrantFiled: March 29, 1995Date of Patent: August 20, 1996Assignee: Dai Nippon Printing Co., Ltd.Inventors: Masumi Nishizawa, Masayuki Iijima, Takashi Miyama
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Patent number: 5545606Abstract: The present invention provides a thermal transfer image-receiving sheet capable of forming an image excellent in various types of fastness, particularly in light fastness, maintaining the effect of the ultraviolet absorber during the storage without deterioration and stably existing within a dye-receiving layer through the use of a thermal transfer process wherein use is made of a sublimable dye. The thermal transfer image-receiving sheet of the present invention comprises a substrate sheet and a dye-receiving layer formed on at least one surface of the substrate sheet, wherein a layer containing an ultraviolet absorber is provided between the substrate sheet and the dye-receiving layer.Type: GrantFiled: January 17, 1995Date of Patent: August 13, 1996Assignee: Dai Nippon Printing Co., Ltd.Inventors: Ryohei Takiguchi, Hitoshi Saito, Masumi Nishizawa
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Patent number: 5405824Abstract: The present invention provides a thermal transfer image-receiving sheet capable of forming an image excellent in various types of fastness, particularly in light fastness, maintaining the effect of the ultraviolet absorber during the storage without deterioration and stably existing within a dye-receiving layer through the use of a thermal transfer process wherein use is made of a sublimable dye. The thermal transfer image-receiving sheet of the present invention includes a substrate sheet and a dye-receiving layer formed on at least one surface of the substrate sheet, wherein a layer containing an ultraviolet absorber is provided between the substrate sheet and the dye-receiving layer.Type: GrantFiled: March 23, 1994Date of Patent: April 11, 1995Assignee: Dai Nippon Printing Co., Ltd.Inventors: Ryohei Takiguchi, Hitoshi Saito, Masumi Nishizawa
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Patent number: 5328888Abstract: The present invention provides a thermal transfer image-receiving sheet capable of forming an image excellent in various types of fastness, particularly in light fastness, maintaining the effect of the ultraviolet absorber during the storage without deterioration and stably existing within a dye-receiving layer through the use of a thermal transfer process wherein use is made of a sublimable dye. The thermal transfer image-receiving sheet of the present invention includes a substrate sheet and a dye-receiving layer formed on at least one surface of the substrate sheet, wherein a layer containing an ultraviolet absorber is provided between the substrate sheet and the dye-receiving layer.Type: GrantFiled: November 13, 1992Date of Patent: July 12, 1994Assignee: Dai Nippon Printing Co., Ltd.Inventors: Ryohei Takiguchi, Hitoshi Saito, Masumi Nishizawa