Patents by Inventor Tsuyoshi Santoh
Tsuyoshi Santoh 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: 6550909Abstract: Disclosed herein is an ink-jet recording method in which recording is conducted with an ink comprising a pigment component on a recording medium comprising a substrate and a porous layer including polymer particles provided thereon. The method comprises, in the case where the pore diameter distribution of the porous layer including polymer particles and the particle diameter distribution of the pigment component are both expressed in terms of frequency distribution, the steps of forming an image upon controlling a proportion of the frequency of the pore diameter of the porous layer including polymer particles, which overlaps the particle diameter distribution of the pigment component, to the frequency of the whole pore diameter of the porous layer including polymer particles to from 0.1% to 10%; and heat-treating the porous layer including polymer particles after the formation of the image.Type: GrantFiled: October 9, 1998Date of Patent: April 22, 2003Assignee: Canon Kabushiki KaishaInventors: Hirofumi Ichinose, Naoki Kushida, Tsuyoshi Santoh, Hiroyuki Ogino
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Publication number: 20020048655Abstract: Disclosed herein is an ink-jet recording method in which recording is conducted with an ink comprising a pigment component on a recording medium comprising a substrate and a porous layer including polymer particles provided thereon, the method comprising, in the case where the pore diameter distribution of the porous layer including polymer particles and the particle diameter distribution of the pigment component are both expressed in terms of frequency distribution, the steps of forming an image upon controlling a proportion of the frequency of the pore diameter of the porous layer including polymer particles, which overlaps the particle diameter distribution of the pigment component, to the frequency of the whole pore diameter of the porous layer including polymer particles to from 0.1% to 10%, and heat-treating the porous layer including polymer particles after the formation of the image.Type: ApplicationFiled: October 9, 1998Publication date: April 25, 2002Inventors: HIROFUMI ICHINOSE, NAOKI KUSHIDA, TSUYOSHI SANTOH, HIROYUKI OGINO
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Patent number: 5605732Abstract: An aminium salt compound has the structure expressed by the following formula (I) or (II), and an optical recording layer has a recording layer containing the aminium salt compound. ##STR1## wherein X.sup.- indicates a monovalent metal complex anion; and R.sub.1 through R.sub.8 each indicate a hydrogen atom or a monovalent organic residue, and at least one of R.sub.1 through R.sub.8 is a monovalent organic residue selected from the group consisting of a substituted or unsubstituted alkoxyalkyl group, substituted or unsubstituted alkenyl group, substituted or unsubstituted alkynyl group and substituted or unsubstituted aralkyl group; and n is 1 or 2; and ##STR2## wherein X.sup.- indicates a monovalent metal complex anion; and R.sub.1 ' through R.sub.8 ' indicate the atoms that, when taken together in combination R.sub.m ' and R.sub.Type: GrantFiled: December 29, 1992Date of Patent: February 25, 1997Assignee: Canon Kabushiki KaishaInventors: Chieko Mihara, Hiroyuki Sugata, Tsuyoshi Santoh
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Patent number: 5516469Abstract: The present invention provides a process using a roll stamper which molds a substrate sheet for information recording mediums by continuously transferring preformat patterns on a resin sheet. The roll stamper has the feature that the preformat pattern on the roll stamper has a value of b/a of greater than 1 when the length of the preformat pattern in the direction parallel to the direction in which the resin sheet is transported is defined as a and the length in the direction perpendicular thereto as b.Type: GrantFiled: March 28, 1994Date of Patent: May 14, 1996Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Santoh, Hiroyuki Sugata, Masataka Yashima, Hirofumi Kamitakahara, Hitoshi Yoshino, Osamu Kanome, Tetsuya Sato, Hisanori Hayashi
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Patent number: 5492792Abstract: An optical recording medium of the present invention has a recording layer containing an organic coloring matter expressed by the following formula (I) or (II): ##STR1## wherein R.sub.0 through R.sub.5 each indicate a hydrogen atom or an monovalent organic residue, at least one of R.sub.0 through R.sub.3 being a fluorine-containing monovalent organic residue; m indicates 0, 1 or 2; and X.sup..crclbar. indicates an anion residue. ##STR2## wherein X.sup..crclbar. indicates an anion residue; m indicates 0, 1 or 2; and R.sub.0' and R.sub.3' are atoms forming combinations of R.sub.0' and R.sub.1', and R.sub.2', and R.sub.Type: GrantFiled: May 10, 1993Date of Patent: February 20, 1996Assignee: Canon Kabushiki KaishaInventors: Miki Tamura, Tsuyoshi Santoh, Chieko Mihara
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Patent number: 5480596Abstract: An apparatus and method for producing an optical recording medium or an optical recording medium substrate sheet forms an photo-curable resin layer on at least one of a substrate sheet and a stamper which undergoes elastic deformation. The stamper bears a pattern corresponding with preformatting information and is brought into close contact with the substrate sheet wherein the photo-curable resin layer is interposed between them and cured.Type: GrantFiled: November 21, 1994Date of Patent: January 2, 1996Assignee: Canon Kabushiki KaishaInventors: Yukitoshi Okubo, Tsuyoshi Santoh, Miki Tamura, Chieko Mihara, Hiroyuki Sugata, Osamu Kanome, Masataka Yashima
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Patent number: 5479394Abstract: An optical recording medium includes in sequence a transparent substrate, a light-reflecting layer, a transparent intermediate layer and a light-absorbing layer. The light-reflecting layer, the transparent intermediate layer and the light-absorbing layer in combination constitute a multi-layer optical element showing a high reflectance with respect to a reproducing light beam having a wavelength .lambda..sub.r. The resultant high reflectance state in the non-recorded region provides a high contrast in comparison with a record pit when the high reflectance multi-layer optical element is destroyed, and also provides the record with an improved resistance to degradation due to irradiation with the reproducing light beam.Type: GrantFiled: May 15, 1992Date of Patent: December 26, 1995Assignee: Canon Kabushiki KaishaInventors: Masataka Yashima, Hiroyuki Sugata, Tsuyoshi Santoh, Miki Tamura, Chieko Mihara
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Patent number: 5354590Abstract: The present invention provides an optical recording medium having on a substrate a recording layer containing an organic coloring matter and a record-assisting layer which is formed out of an elastic polymer cured by a radical reaction. So that radicals generated in the record-assisting layer may be inactivated, a radical scavenger is given to the recording layer, or a radical-scavenging layer is provided between the recording layer and the record-assisting layer.Type: GrantFiled: February 14, 1992Date of Patent: October 11, 1994Assignee: Canon Kabushiki KaishaInventors: Miki Tamura, Tsuyoshi Santoh
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Patent number: 5324188Abstract: A roll stamper which molds a substrate resin sheet into an information recording media by continuously transferring preformat patterns on the substrate resin sheet, and a production process therefor. The preformat pattern on the roll stamper has a value of b/a of greater than 1 when the length of the preformat pattern in a direction parallel to the direction in which the resin sheet is transported is defined as a and the length in a direction perpendicular thereto as b.Type: GrantFiled: March 30, 1993Date of Patent: June 28, 1994Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Santoh, Hiroyuki Sugata, Masataka Yashima, Hirofumi Kamitakahara, Hitoshi Yoshino, Osamu Kanome, Tetsuya Sato, Hisanori Hayashi
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Patent number: 5281371Abstract: A method for forming a substrate sheet for optical recording media having a preformat on the surface is disclosed. This method has the steps of extruding a melted resin to form a melted resin sheet, pressing the melted resin sheet between a mirror roll and a resin roll prior to the curing of the melted resin sheet, thereby forming a resin sheet, the resin roll being disposed in the face of the mirror roll and being covered on the peripheral surface thereof with a resin, and forming a photocurable resin composition layer on the surface of the resin sheet with which the resin roll has come in contact, and forming the preformat on the photocurable resin composition layer.Type: GrantFiled: November 14, 1991Date of Patent: January 25, 1994Assignee: Canon Kabushiki KaishaInventors: Miki Tamura, Tsuyoshi Santoh, Osamu Kanome
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Patent number: 5275925Abstract: An infrared-absorptive compound represented by the following Formula (I) or (II). ##STR1## to be contained with an organic coloring matter in the recording layer for providing durable optical recording mediums.Type: GrantFiled: May 14, 1992Date of Patent: January 4, 1994Assignee: Canon Kabushiki KaishaInventors: Chieko Mihara, Hiroyuki Sugata, Tsuyoshi Santoh, Tetsuro Fukui
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Patent number: 5271979Abstract: An optical recording medium including a recording layer containing a polymethine compound which can be expressed by the following formula: ##STR1## where R.sub.1 and R.sub.2 represent aryl groups substituted by alkyl groups, or aryl groups substituted by alkoxy groups; R.sub.3 and R.sub.4 represent substituted or unsubstituted aryl groups, substituted or unsubstituted heterocyclic groups, or substituted or unsubstituted styryl groups; m is 0, 1 or 2; and X.crclbar. is an anion.Type: GrantFiled: April 27, 1992Date of Patent: December 21, 1993Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Santoh, Hiroyuki Sugata, Chieko Mihara
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Patent number: 5267228Abstract: A substrate for an optical card having tracking grooves in a stripe form formed on the surface of an extrusion-molded thermoplastic resin sheet is characterized in that the direction of the tracking grooves is in parallel to the extrusion direction of the thermoplastic resin sheet, and the recording or reproduction using the optical card is characterized by that the optical card is bent and reciprocally moved along the direction of tracking grooves.Type: GrantFiled: April 4, 1991Date of Patent: November 30, 1993Assignee: Canon Kabushiki KaishaInventors: Masataka Yashima, Osamu Kanome, Hirofumi Kamitakahara, Tsuyoshi Santoh, Hiroyuki Sugata, Tetsuya Sato, Hitoshi Yoshino, Hisanori Hayashi
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Process for producing a roll stamper for molding a substrate sheet for information recording mediums
Patent number: 5266136Abstract: A process for producing a roll stamper which molds a substrate sheet for information recording mediums by continuously transferring preformat patterns on a resin sheet. The roll stamper has the feature that the preformat pattern on the roll stamper has a value b/a of greater than 1, where the length of the preformat pattern in the direction parallel to the direction in which the resin sheet is transported is defined as a and the length in the direction perpendicular thereto as b.Type: GrantFiled: February 1, 1993Date of Patent: November 30, 1993Assignee: Canon Kabushiki KaishaInventors: Osamu Kanome, Tsuyoshi Santoh, Hiroyuki Sugata, Masataka Yashima, Tetsuya Sato, Hitoshi Yoshino, Hirofumi Kamitakahara, Hisanori Hayashi -
Patent number: 5231262Abstract: An optical cutting method includes a step of detecting a center position on a sheet film with a position-detecting light flux; and a step of cutting out a disk film from the sheet film by projecting a cutting laser beam along circumference of a substantially circular form around the detected center position.Type: GrantFiled: August 31, 1992Date of Patent: July 27, 1993Assignee: Canon Kabushiki KaishaInventors: Susumu Matsumura, Masataka Yashima, Tsuyoshi Santoh, Osamu Kanome, Kazuya Matsumoto
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Patent number: 5190849Abstract: An optical recording medium contains at least one squarylium- or croconium-base dye of formulae [I] or [II], and a carboxylic acid-base metallic complex: ##STR1## where A.sym. is a cationic bivalent organic residue and B is a monovalent organic residue. The optical recording medium has an absorption band for light in the long wavelength region and is superior in stability against heat and light.Type: GrantFiled: October 11, 1990Date of Patent: March 2, 1993Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Santoh, Chieko Mihara, Hiroyuki Sugata
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Patent number: 5187043Abstract: Described is an optical recording medium comprising at least one of naphtholactam compounds represented by the specific formulas. The optical recording medium has absorption at the long wavelength side, can make a record with high sensitivity even when a long wavelength oscillation laser such as a semiconductor layer is used, and can obtain a high C/N ratio because of the capability of forming pits with good shapes. It is also possible to provide an optical recording medium which can be readily prepared by coating, has good stability to heat, and has superior storage stability with less reproduction deterioration.Type: GrantFiled: November 12, 1991Date of Patent: February 16, 1993Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Santoh, Chieko Mihara
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Patent number: 5147592Abstract: A process for preparing a substrate sheet for optical recording mediums includes the steps of extruding a molten resin to form a resin sheet and bringing the resin sheet into pressure between a preformat roll and a roll disposed opposingly to said preformat roll to transfer a preformat pattern to the surface of the resin sheet, wherein the roll disposed opposingly to the preformat roll includes a roll whose surface is covered with an elastomeric resin.Type: GrantFiled: September 10, 1990Date of Patent: September 15, 1992Assignee: Canon Kabushiki KaishaInventors: Tetsuya Sato, Osamu Kanome, Hitoshi Yoshino, Hirofumi Kamitakahara, Hisanori Hayashi, Tsuyoshi Santoh
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Patent number: 5141785Abstract: The present invention relates to a recording medium comprising a plane substrate and a recording layer containing a polymer liquid crystal compound, wherein said recording layer containing a polymer liquid crystal compound has a groove.Type: GrantFiled: April 13, 1990Date of Patent: August 25, 1992Assignee: Canon Kabushiki KaishaInventors: Kazuo Yoshinada, Toshikazu Ohnishi, Yutaka Kurabayashi, Tsuyoshi Santoh
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Patent number: 5137661Abstract: A process for producing an optical recording medium, including the steps of: melt-extruding a resin to form a resin sheet; passing the resin sheet under pressure between a first roller having a predetermined unevenness pattern and a second roller disposed opposite thereto before the resin sheet is hardened, thereby to transfer the unevenness pattern to a surface of the resin sheet; and forming a recording layer having an organic coloring matter on the surface of the resin sheet provided with the unevenness pattern; wherein the steps are conducted while the resin sheet is moved.Type: GrantFiled: September 16, 1991Date of Patent: August 11, 1992Assignee: Canon Kabushiki KaishaInventors: Osamu Kanome, Hiroyuki Sugata, Tetsuya Satoh, Yukitoshi Ohkubo, Tsuyoshi Santoh