Patents by Inventor Hirokatsu Imamura
Hirokatsu Imamura 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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Publication number: 20030113517Abstract: A composite thermal transfer sheet is disclosed, having a thermal transfer sheet comprising a substrate film and a heat-fusible ink layer disclosed on surface side thereof, a transfer receiving material, and a temporary adhesive layer capable of peelably bonding the heat-fusible ink layer of the thermal transfer sheet to the transfer-receiving material, wherein the temporary adhesive layer comprises adhesive particles having a low glass transition temperature, wax particles and resin particles having a high glass transition temperature.Type: ApplicationFiled: May 24, 2002Publication date: June 19, 2003Inventors: Hirokatsu Imamura, Koichi Nakamura, Hirokazu Kaneko
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Patent number: 6395375Abstract: When a temporary adhesive layer for peelably bonding a transfer-receiving material to a thermal transfer sheet comprising a substrate film and a heat-fusible ink layer disposed on one side thereof is caused to comprise a specific adhesive, an excellent composite thermal transfer material is provided. In such a composite thermal transfer sheet, the thermal transfer sheet is firmly bonded to the transfer-receiving material so as not to cause wrinkles or deviation, both of these members may easily be peeled from each other so that the ink layer is exactly transferred to the paper in a transfer region and it is not transferred thereto at all in a non-transfer region, whereby the transfer-receiving material is not contaminated. An antistatic treatment provides a composite thermal transfer sheet causing no trouble due to charging at the time of or after printing operation.Type: GrantFiled: November 20, 1998Date of Patent: May 28, 2002Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Hirokatsu Imamura, Koichi Nakamura, Hirokazu Kaneko
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Patent number: 6203890Abstract: A co-winding type thermal transfer sheet is constituted by forming on one surface side of a substrate film a heat-fusible ink layer comprising a pigment and a particulate binder, and causing a tracing paper to be peelably bonded onto the heat-fusible ink layer by the medium of an adhesive layer. The thus constituted co-winding type thermal transfer sheet is capable of providing an original image which can be reproduced by use of a blueprint process so as to provide blueprint images having a high precision and a high contrast. In addition, a co-winding type thermal transfer sheet may also be constituted by forming a heat-fusible ink layer on one surface side of a substrate film and causing a transparent resin sheet to be peelably bonded onto the heat-fusible ink layer by the medium of an adhesive layer containing a cross-linking agent. The thus constituted co-winding type thermal transfer sheet is capable of providing an image excellent in wear resistance on the transparent resin sheet.Type: GrantFiled: February 8, 2000Date of Patent: March 20, 2001Assignee: DAI Nippon Printing Co., Ltd.Inventors: Hirokatsu Imamura, Masafumi Hayashi, Kouichi Nakamura, Hirokazu Kaneko, Shigeki Umise, Kenichiro Suto, Hiromi Watanabe
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Patent number: 6043191Abstract: A co-winding type thermal transfer sheet is constituted by forming on one surface side of a substrate film a heat-fusible ink layer comprising a pigment and a particulate binder, and causing a tracing paper to be peelably bonded onto the heat-fusible ink layer by the medium of an adhesive layer. The thus constituted co-winding type thermal transfer sheet is capable of providing an original image which can be reproduced by use of a blueprint process so as to provide blueprint images having a high precision and a high contrast.In addition, a co-winding type thermal transfer sheet may also be constituted by forming a heat-fusible ink layer on one surface side of a substrate film and causing a transparent resin sheet to be peelably bonded onto the heat-fusible ink layer by the medium of an adhesive layer containing a cross-linking agent. The thus constituted co-winding type thermal transfer sheet is capable of providing an image excellent in wear resistance on the transparent resin sheet.Type: GrantFiled: May 18, 1999Date of Patent: March 28, 2000Assignee: Dai Nippon Printing Co., Ltd.Inventors: Hirokatsu Imamura, Masafumi Hayashi, Kouichi Nakamura, Hirokazu Kaneko, Shigeki Umise, Kenichiro Suto, Hiromi Watanabe
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Patent number: 5948511Abstract: A co-winding type thermal transfer sheet is constituted by forming on one surface side of a substrate film a heat-fusible ink layer comprising a pigment and a particulate binder, and causing a tracing paper to be peelably bonded onto the heat-fusible ink layer by the medium of an adhesive layer. The thus constituted co-winding type thermal transfer sheet is capable of providing an original image which can be reproduced by use of a blueprint process so as to provide blueprint images having a high precision and a high contrast.In addition, a co-winding type thermal transfer sheet may also be constituted by forming a heat-fusible ink layer on one surface side of a substrate film and causing a transparent resin sheet to be peelably bonded onto the heat-fusible ink layer by the medium of an adhesive layer containing a cross-linking agent. The thus constituted co-winding type thermal transfer sheet is capable of providing an image excellent in wear resistance on the transparent resin sheet.Type: GrantFiled: July 23, 1996Date of Patent: September 7, 1999Assignee: Dai Nippon Printing Co., Ltd.Inventors: Hirokatsu Imamura, Masafumi Hayashi, Kouichi Nakamura, Hirokazu Kaneko, Shigeki Umise, Kenichiro Suto, Hiromi Watanabe
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Patent number: 5876836Abstract: When a temporary adhesive layer for peelably bonding a transfer-receiving material to a thermal transfer sheet comprising a substrate film and a heat-fusible ink layer disposed on one side thereof is caused to comprise a specific adhesive, an excellent composite thermal transfer material is provided. In such a composite thermal transfer sheet, the thermal transfer sheet is firmly bonded to the transfer-receiving material so as not to cause wrinkles or deviation, both of these members may easily be peeled from each other so that the ink layer is exactly transferred to the paper in a transfer region and it is not transferred thereto at all in a non-transfer region, whereby the transfer-receiving material is not contaminated. An antistatic treatment provides a composite thermal transfer sheet causing no trouble due to charging at the time of or after printing operation.Type: GrantFiled: June 7, 1995Date of Patent: March 2, 1999Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Hirokatsu Imamura, Koichi Nakamura, Hirokazu Kaneko
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Patent number: 5573833Abstract: A co-winding type thermal transfer sheet is constituted by forming on one surface side of a substrate film a heat-fusible ink layer comprising a pigment and a particulate binder, and causing a tracing paper to be peelably bonded onto the heat-fusible ink layer by the medium of an adhesive layer. The thus constituted co-winding type thermal transfer sheet is capable of providing an original image which can be reproduced by use of a blueprint process so as to provide blueprint images having a high precision and a high contrast.In addition, a co-winding type thermal transfer sheet may also be constituted by forming a heat-fusible ink layer on one surface side of a substrate film and causing a transparent resin sheet to be peelably bonded onto the heat-fusible ink layer by the medium of an adhesive layer containing a cross-linking agent. The thus constituted co-winding type thermal transfer sheet is capable of providing an image excellent in wear resistance on the transparent resin sheet.Type: GrantFiled: March 30, 1995Date of Patent: November 12, 1996Assignee: Dai Nippon Printing Co., Ltd.Inventors: Hirokatsu Imamura, Masafumi Hayashi, Kouichi Nakamura, Hirokazu Kaneko, Shigeki Umise, Kenichiro Suto, Hiromi Watanabe
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Patent number: 5484644Abstract: When a temporary adhesive layer for peelable bonding a transfer-recieving material to a thermal transfer sheet comprising a substrate film and a heat-fusible ink layer disposed on one side thereof is caused to comprise a specific adhesive, an excellent composite thermal transfer material is provided. In such a composite thermal transfer sheet, the thermal transfer sheet is firmly bonded to the transfer-recieving material so as not to cause wrinkles or deviation, both of these members may easily be peeled from each other so that the ink layer is exactly transferred to the paper in a transfer region and is not transferred thereto at all in a non-transfer region, whereby the transfer-recieving material is not contaminated. Further, when at least one one end portion of a sheet-type composite thermal transfer sheet is fixed, there is provided a composite thermal transfer sheet wherein unintended peeling is prevented.Type: GrantFiled: July 14, 1993Date of Patent: January 16, 1996Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Hirokatsu Imamura, Koichi Nakamura
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Patent number: 5441567Abstract: A strip or roll of thermal transfer type recording sheet has a base film on one side of which a hot-melt ink layer is formed for recording on paper or other surface by thermal transfer. An end mark or marks to be detected optically for warning the user of the fact that the recording roll is being used up is/are formed adjacent one end of the strip by gravure printing with use of a light-reflective ink. The end mark or marks produced by gravure printing are of such constant thickness, and with the bounding edges so sharply defined, that they permit positive detection by an optical sensor.For the production of the end marks by gravure printing, a web of base film with the hot-melt ink layer formed on one side thereof, with a width several times greater than that of each strip of recording sheet to be manufactured, is fed through a printing unit of a gravure printing section.Type: GrantFiled: October 30, 1992Date of Patent: August 15, 1995Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Shigeki Umise, Hirokatsu Imamura
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Patent number: 5427840Abstract: A co-winding type thermal transfer sheet is constituted by forming on one surface side of a substrate film a heat-fusible ink layer comprising a pigment and a particulate binder, and causing a tracing paper to be peelably bonded onto the heat-fusible ink layer by the medium of an adhesive layer. The thus constituted co-winding type thermal transfer sheet is capable of providing an original image which can be reproduced by use of a blueprint process so as to provide blueprint images having a high precision and a high contrast.In addition, a co-winding type thermal transfer sheet may also be constituted by forming a heat-fusible ink layer on one surface side of a substrate film and causing a transparent resin sheet to be peelably bonded onto the heat-fusible ink layer by the medium of an adhesive layer containing a cross-linking agent. The thus constituted co-winding type thermal transfer sheet is capable of providing an image excellent in wear resistance on the transparent resin sheet.Type: GrantFiled: November 27, 1991Date of Patent: June 27, 1995Assignee: DAI Nippon Printing Co., Ltd.Inventors: Hirokatsu Imamura, Masafumi Hayashi, Kouichi Nakamura, Hirokazu Kaneko, Shigeki Umise, Kenichiro Suto, Hiromi Watanabe
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Patent number: 5362549Abstract: A thermal transfer sheet which is capable of preventing ground staining, trailing, etc., at the time of printing and has been improved in image density, resolution, etc., is provided by forming a sensitizing layer having a lower melt viscosity than an ink layer between the ink layer and a substrate film, even when such a thermal transfer sheet is used for an n-fold recording mode. Further, a thermal transfer sheet suitable for an n-fold recording mode which is capable of uniformly transferring an ink layer, is capable of preventing white dropout, ground staining, trailing, etc., at the time of printing, and has been improved in image density, resolution, etc., is provided by forming a surface layer on the surface of the ink layer, and forming the ink layer and surface layer so that the ink layer has a melt viscosity of 1000-5000 cps at 100.degree. C. and the surface layer has a melt viscosity of 2000-10000 cps at 150.degree. C.Type: GrantFiled: February 4, 1993Date of Patent: November 8, 1994Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Hirokatsu Imamura, Koichi Nakamura, Jiro Ohnishi
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Patent number: 5264279Abstract: When a temporary adhesive layer for peelably bonding a transfer-receiving material to a thermal transfer sheet comprising a substrate film and a heat-fusible ink layer disposed on one side thereof is caused to comprise a specific adhesive, an excellent composite thermal transfer material is provided. In such a composite thermal transfer sheet, the thermal transfer sheet is firmly bonded to the transfer-receiving material so as not to cause wrinkles or deviation, both of these members may easily be peeled from each other so that the ink layer is exactly transferred to the paper in a transfer region and it is not transferred thereto at all in a non-transfer region, whereby the transfer-receiving material is not contaminated. Further, when at least one end portion of a sheet-type composite thermal transfer sheet is fixed, there is provided a composite thermal transfer sheet wherein unintended peeling is prevented.Type: GrantFiled: September 18, 1990Date of Patent: November 23, 1993Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Hirokatsu Imamura, Koichi Nakamura, Hirokazu Kaneko
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Patent number: 5219638Abstract: A thermal transfer sheet which is capable of preventing ground staining, trailing, etc., at the time of printing and has been improved in image density, resolution, etc., is provided by forming a sensitizing layer having a lower melt viscosity than an ink layer between the ink layer and a substrate film, even when such a thermal transfer sheet is used for an n-fold recording mode. Further, a thermal transfer sheet suitable for an n-fold recording mode which is capable of uniformly transferring an ink layer, is capable of preventing white dropout, ground staining, trailing, etc., at the time of printing, and has been improved in image density, resolution, etc., is provided by forming a surface layer on the surface of the ink layer, and forming the ink layer and surface layer so that the ink layer has a melt viscosity of 1000-5000 cps at 100.degree. C. and the surface layer has a melt viscosity of 2000-10000 cps at 150.degree. C.Type: GrantFiled: July 31, 1990Date of Patent: June 15, 1993Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Hirokatsu Imamura, Koichi Nakamura, Jiro Ohnishi
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Patent number: 5180607Abstract: A strip or roll of thermal transfer type recording sheet has a base film on one side of which a hot-melt ink layer is formed for recording on paper or other surface by thermal transfer. An end mark or marks to be detected optically for warning the user of the fact that the recording roll is being used up is/are formed adjacent one end of the strip by gravure printing with use of a light-reflective ink. The end mark or marks produced by gravure printing are of such constant thickness, and with the bounding edges so sharply defined, that they permit positive detection by an optical sensor.For the production of the end marks by gravure printing, a web of base film with the hot-melt ink layer formed on one side thereof, with a width several times greater than that of each strip of recording sheet to be manufactured, is fed through a printing unit of a gravure printing section.Type: GrantFiled: February 26, 1992Date of Patent: January 19, 1993Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Shigeki Umise, Hirokatsu Imamura
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Patent number: 5109795Abstract: A strip or roll of thermal transfer type recording sheet has a base film on one side of which a hot-melt ink layer is formed for recording on paper or other surface by thermal transfer. An end mark or marks to be detected optically for warning the user of the fact that the recording roll is being used up is/are formed adjacent one end of the strip by gravure printing with use of a light-reflective ink. The end mark or marks produced by gravure printing are of such constant thickness, and with the bounding edges so sharply defined, that they permit positive detection by an optical sensor.For the production of the end marks by gravure printing, a web of base film with the hot-melt ink layer formed on one side thereof, with a width several times greater than that of each strip of recording sheet to be manufactured, is fed through a printing unit of a gravure printing section.Type: GrantFiled: November 15, 1990Date of Patent: May 5, 1992Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Shigeki Umise, Hirokatsu Imamura
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Patent number: 4985292Abstract: A strip or roll of thermal transfer type recording sheet (1a) has a base film (1a) on one side of which a hot melt ink layer (1b) is formed for recording on paper or other surface by thermal transfer. An end mark or marks to be detected optionally for warning the user of the fact that the recording roll is being used up is/are formed adjacent one end of the strip by gravure printing with use of a light-reflective ink. The ink mark or marks produced by gravure printing are of such constant thickness, and with the bounding edges so sharply defined, that they permit positive detection by an optical sensor.For the production of the end marks by gravure printing, a web of base film with the hot melt ink layer formed on one side thereof, with a width several times greater than that of each strip of recording sheet to be manufactured, is fed through a printing unit of a gravure printing section.Type: GrantFiled: October 19, 1988Date of Patent: January 15, 1991Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Shigeki Umise, Hirokatsu Imamura
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Patent number: 4916006Abstract: A heat-sensitive transfer recording material for use in a heat-sensitive transfer recording means such as a thermal printer is provided. The recording material comprises a heat-sensitive transfer ribbon having a heat-fusible ink layer provided on the surface of a polyester base film and a heat-resistant protective layer. The heat-resistant protective layer comprises (1) a chlorinated product of a 4-methyl-1-pentene polymer or a derivative thereof and an amorphous linear saturated polyester or (2) at least one member selected from the group consisting of chlorinated products of acid-modified 4-methyl-1-pentene polymers and acid-modified 4-methyl-1-pentent/.alpha.-olefin copolymers.Type: GrantFiled: November 13, 1987Date of Patent: April 10, 1990Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Kyoichi Yamamoto, Akira Mizobuchi, Yasuo Sato, Takayasu Hirano, Nobuhiko Ikebayashi, Hirokatsu Imamura