Identified Electron Acceptor (developer) Patents (Class 503/225)
  • Patent number: 10772219
    Abstract: There is provided a copper foil with a carrier particularly suitable for a circuit forming process for removing a carrier after laser drilling and desmear treatment, in detail, a copper foil with a carrier having high heat press resistance (heat resistance) of the carrier, laser drilling performance, corrosion resistance of the carrier against the desmear treatment, corrosion resistance of a release layer against the desmear treatment, and carrier release strength. The copper foil with a carrier comprises a carrier comprising at least one resin selected from polyethylene naphthalate (PEN) resins, polyethersulfone (PES) resins, polyimide resins, and polyphenylene sulfide resins; a silicon layer provided on the carrier, the silicon layer mainly containing silicon; a carbon layer provided on the silicon layer, the carbon layer mainly containing carbon; and an extremely thin copper layer provided on the carbon layer.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: September 8, 2020
    Assignee: MITSUI MINING & SMELTING CO., LTD.
    Inventor: Yoshinori Matsuura
  • Publication number: 20150024933
    Abstract: A moisture activated image applied to a base substrate, wherein the substrate is integrated into an article of clothing. The moisture-activated invisible image is created by applying a hydrophobic material and a moisture absorbing material in a pattern. The image would be concealed when the substrate is dry. When wet, the moisture absorbing material changes in shade or color and the hydrophobic material repels the moisture, retaining the original color. The contrast between the wetted material and the repelled material displays the image. The hydrophobic material can be impregnated within the substrate, applied to an exposed surface, or applied to a contacting surface. The moisture-activated invisible stencil technology can be applied for simple aesthetic applications or advanced for applications to identify wet objects. Other applications can include warnings for wet roadways, pool decks, umbrellas, and the like.
    Type: Application
    Filed: September 29, 2014
    Publication date: January 22, 2015
    Inventor: James Philip Drago
  • Patent number: 8569208
    Abstract: Color change compositions that transition from a first to second color state upon application of an applied stimulus are provided. Also provided are substrates having the compositions on a surface thereof, as well as methods of making and using the compositions.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: October 29, 2013
    Assignee: Segan Industries, Inc.
    Inventor: Hans O. Ribi
  • Patent number: 8497227
    Abstract: Diphenylsulfone bridged compounds of the general formula: (1) wherein n is an integer of 1 to 10. Further, there is disclosed a thermal recording material comprising a support and, superimposed thereon, a thermosensitive color forming layer containing a color forming substance for thermal recording consisting of any of the diphenylsulfone bridged compounds and a color forming substance consisting of a colorless or light-colored leuco dye. This thermal recording material excels in the storability, especially wet heat resistance and oil resistance, of image areas and further exhibits excellent characteristics in the storability, especially heat resistance, of undeveloped areas.
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: July 30, 2013
    Assignee: Nicca Chemical Co., Ltd.
    Inventors: Hajime Saito, Takeo Hasegawa
  • Patent number: 8492308
    Abstract: The present invention provides a thermosensitive recording medium with excellent color developing sensitivity, moist heat resistance and plasticizer resistance, as well as excellent heat resistance, background coloring, light resistance and the like in the printed image. A diphenyl sulfone derivative containing a hydroxyl group on one end and an alkoxy group on the other end has a higher melting point than the one containing hydroxyl groups on both ends. As a result, the thermosensitive recording medium obtained using the diphenyl sulfone derivative as the color developing agent in the thermosensitive color developing layer has excellent heat resistance. However the color developing sensitivity of the thermosensitive recording medium generally declines simultaneously, when a color developing agent with a high melting point is ordinarily used.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: July 23, 2013
    Assignees: Nippon Paper Industries Co., Ltd., API Corporation
    Inventors: Tatsuyuki Kurihara, Tatsuo Nagai, Yoshimi Midorikawa, Akihito Ogino, Mamoru Suga, Yoshimune Aosaki
  • Patent number: 8314050
    Abstract: A material for pressure measurement is provided, the material having a substrate made of plastic, a color forming agent layer containing a colorless electron-donating dye precursor and a color developing agent layer containing an electron-accepting compound, the material for pressure measurement forming a color utilizing a color forming reaction between the colorless electron-donating dye precursor and the electron-accepting compound, wherein the colorless electron-donating dye precursor is included in a microcapsule containing an urethane bond, wherein at least one kind of the electron-accepting compound is a metal salt of salicylic acid having a substituent, and wherein the microcapsule satisfies a relation ?/D=from 1.0×10?3 to 2.0×10?2, where ? is a number-average wall thickness (?m) of the microcapsules, and D is a median diameter (?m) of microcapsules on a volume basis.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: November 20, 2012
    Assignee: FUJIFILM Corporation
    Inventor: Masanobu Takashima
  • Patent number: 8303857
    Abstract: The invention relates to a composite with inverse thermochromic properties, the composite changing from a colorless into a colored state with increasing temperature. The composite thereby contains a colorant, a developer and a fluxing agent and also an inorganic filler. The invention likewise relates to a composite material which contains a polymer-based matrix into which at least one composite with inverse thermochromic properties is doped. These composite materials are used in the field of sensor technology, solar technology, transport and communications technology and medical technology.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: November 6, 2012
    Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
    Inventors: Arno Seeboth, Olaf Mühling, Ralf Ruhmann, Renate Vetter
  • Publication number: 20120208698
    Abstract: The conventionally constructed thermosensitive recording labels prepared by installing a thermosensitive recording layer on one side of a support material and a tackifier layer on the other side were found to be clearly limited when meeting the demand for improved water and weather resistance. Therefore, the present invention provides a thermosensitive recording label having much better water and weather resistance than conventionally available one. The thermosensitive recording label having a thermosensitive recording layer and a tackifier layer on a transparent film substrate in this order has a superior water and weather resistance.
    Type: Application
    Filed: September 1, 2010
    Publication date: August 16, 2012
    Inventors: Junichi Hayakawa, Hiroshi Kohama, Akihito Ogino, Yasuaki Matsumori
  • Publication number: 20120157303
    Abstract: Provided are a coating solution for a thermosensitive color developing layer of excellent storability wherein color development during its storage or during producing a thermal recording material is suppressed, and a thermal recording material with excellent print portion (image portion) storability and suppressed staining in the background color (white background). A coating solution for a thermosensitive color developing layer, which comprises a colorless or pale-colored electron-donating leuco dye, a hindered phenol compound and, as an electron-accepting developer, a diphenylsulfone derivative represented by the following formula (1): wherein the aforementioned hindered phenol compound has an average particle size (D50) of not more than 0.5 ?m, and the coating solution has a color tone a* of not less than ?4.0 as measured according to JIS Z 8729 and a whiteness W of not less than 62 as measured according to JIS Z 8715.
    Type: Application
    Filed: April 2, 2010
    Publication date: June 21, 2012
    Applicants: API CORPORATION, NIPPON PAPER INDUSTRIES CO., LTD.
    Inventors: Yoshimune Aosaki, Mai Kaneko, Katsuto Ohse, Yukiko Sato
  • Publication number: 20120115719
    Abstract: A polymer composite material (10, 110, 210, 310) is described. The material includes a settable matrix material (12), a plurality of reinforcement members (14) and a plurality of capsule members (16). Each capsule member (16) includes a shell layer (22) encapsulating an indicator material (24). The polymer composite material comprises an initial condition in which each shell layer contains the indicator material, and a damaged condition in which at least one shell layer is ruptured, releasing indicator material. The polymer composite material is changed from the initial condition to the damaged condition by the application of a predetermined force to the polymer composite material.
    Type: Application
    Filed: April 20, 2010
    Publication date: May 10, 2012
    Applicant: EPL Composite Solutions Ltd.
    Inventors: Matthew Richard Turner, David Anthony Johnson
  • Publication number: 20120100988
    Abstract: A note pad includes: a stack of carbonless note sheets each of which includes: a substrate; and a color-developing coating layer formed on an upper surface of the substrate, and including a plurality of microcapsules and a carbonless color-developing material, each of the microcapsules encapsulating a reactive dye and being breakable, when subjected to a pressure, to release the reactive dye to react with the carbonless color-developing material for color development.
    Type: Application
    Filed: March 1, 2011
    Publication date: April 26, 2012
    Applicant: TAIWAN HOPAX CHEMICALS MFG. CO., LTD.
    Inventors: Tsung-Tien KUO, Jen-Rong LIU, Hsien-Min KUO, Tsun-Rung HSU
  • Patent number: 8129307
    Abstract: The present invention provides a thermosensitive recording medium, which is excellent in stamping ability, anti-scratching ability, and water and plasticizer resistance of image area as well as in recording sensitivity, image quality and storage stability. The present invention is a thermosensitive recording medium having a thermosensitive recording layer containing at least a colorless or pale colored basic leuco dye and an electron accepting developing agent as a coating layer on a substrate, wherein at least an outermost layer among the thermosensitive recording layer and other optionally prepared coated layers contains powdered cellulose, wherein the powdered cellulose is prepared by a dry grinding process at ambient temperature.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: March 6, 2012
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Jun Makihara, Akihito Ogino
  • Patent number: 8097560
    Abstract: The present invention provides a heat-sensitive recording material with enhanced color developing sensitivity maintaining heat resistance and image storage stability characteristics such as plasticizer resistance and water resistance. The present invention provides a heat-sensitive recording material including at least a substrate and a heat-sensitive color developing layer containing a leuco dye and developers on the front surface of the substrate, wherein as the developers 4-hydroxy-4?-allyloxydiphenyl sulfone is used in combination with a first diphenyl compound represented by formula (1) and/or a second diphenyl compound represented by formula (2).
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: January 17, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshiaki Matsunaga, Yoshikazu Kaneko
  • Patent number: 8093179
    Abstract: Storage-stable compositions comprising a color developer, an anionic dispersant and a thickening agent as well as heat-sensitive recording materials comprising such compositions, a process for its manufacture and its use.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: January 10, 2012
    Assignee: BASF SE
    Inventor: Robert Montgomery O'Neil
  • Patent number: 8062993
    Abstract: The present invention relates to a developer mixture for a thermal recording material, which comprises a mixture of the first organic developer comprising a condensate or a condensed composition represented by the formula (I): wherein R is a lower alkyl group or an aralkyl group, n is an integer of 0 to 5, and X and Y are each a hydrogen atom, an alkyl group or an aryl group, and the second organic developer other than the first organic developer (except 2,2-bis(3-methyl-4-hydroxyphenyl)propane), a developer mixture for a thermal recording material, and a thermal recording material having a heat-coloring layer containing the developer mixture. Using the developer mixture for a thermal recording material of the present invention, a thermal recording material sufficiently satisfying the recent requirement for high sensitivity, and having superior preservation stability of color images and non-image areas can be realized.
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: November 22, 2011
    Assignees: API Corporation, Nippon Paper Industries Co., Ltd.
    Inventors: Mamoru Suga, Nanako Okamoto, Aya Kato, Takashi Date, Yoshihide Kimura
  • Publication number: 20110045973
    Abstract: Provided is a color-developing composition for recording materials having a superior heat resistance. The color-developing composition is a reaction composition containing a mixture of compounds represented by formula (III) obtained by reacting a dihydroxydiphenylsulfone derivative represented by formula (I) with a dihalide represented by formula (II) X-Y-X (II), wherein, in a composition where the content of a compound with n=1 in said reaction composition is from 5 to 80% by mass of the total solid content of the composition, at least 10% by mass of the compound with n=1 is a crystalline material.
    Type: Application
    Filed: May 1, 2009
    Publication date: February 24, 2011
    Applicant: Nippon Soda Ltd.
    Inventors: Satashi Kodama, Toshiyuki Fukami, Hiroshi Fujii, Tadashi Kawakami, Toshio Aihara
  • Publication number: 20090186760
    Abstract: This invention provides 1,1-bis(4-hydroxyphenyl)-1-phenylethane having a crystal form characterized by an X-ray diffraction pattern having one sharp and strong peak at 16.4° and three sharp peaks of intermediate intensity at each of 13°-16° and 17°-20.8° and at least three peaks of intermediate intensity at 22°-23° as a diffraction angle (2?) in an X-ray diffractometry with Cu-K ?-rays, and being capable of giving the storing stability of a colored image and a non-colored portion against heat, water or the like and the low-energy color-developing property suitable for high-speed color development.
    Type: Application
    Filed: July 18, 2007
    Publication date: July 23, 2009
    Applicant: NIPPONKAYAKU KABUSHIKIKAISHA
    Inventors: Hiroaki Tsugawa, Soichi Uehori, Mituo Yoshifuji
  • Patent number: 7560415
    Abstract: A reversible multicolor thermal recording medium which is free from fogging and has sharp contrast even after recording and erasing are performed repeatedly, and a recording method using the same are provided. A reversible multicolor recording medium is provided, which includes recording layers each containing a plurality of reversible thermal coloring compositions having different coloring tones, formed to be separated from and stacked on a surface direction of a supporting substrate; and the plurality of reversible thermal coloring compositions containing light-to-heat transforming materials which absorb infrared rays having different wavelength ranges to generate heat, respectively; wherein an absorption peak wavelength of the light-to-heat transforming material contained in the recording layers becomes the longest wavelength at the layer formed nearest the supporting substrate, and becomes a shorter wavelength as the layer is closer to the surface layer in the stacked order.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: July 14, 2009
    Assignee: Sony Corporation
    Inventors: Hisanori Tsuboi, Noriyuki Kishii, Kenichi Kurihara
  • Publication number: 20080242539
    Abstract: The present invention provides a reversible thermosensitive recording medium including a support and a thermosensitive recording layer thereon, in which the thermosensitive recording layer contains an electron-donating coloring compound and an electron-accepting compound, and the thermosensitive recording layer is capable of forming a relatively developed condition and a relatively erased condition depending on at least one of the difference of heating temperatures and the difference of cooling rates following to heating, and in which the electron-accepting compound contains a phenol compound expressed by General Formula (1): where, in the General Formula (1), “l” represents an integer of 1 to 3 and “m” represents an integer of 23 or more.
    Type: Application
    Filed: March 16, 2006
    Publication date: October 2, 2008
    Inventors: Satoshi Yamamoto, Kyoji Tsutsui, Hiromi Furuya, Kyohji Okada
  • Publication number: 20080200333
    Abstract: The present invention is to provide an electromagnetic wave shielding sheet with a protective film that is temporarily laminated on a copper mesh layer for shielding electromagnetic waves, the electromagnetic wave shielding sheet is not discolored even after long-term use, especially at high temperature and high humidity, while the protective film exhibits appropriate adhesion properties.
    Type: Application
    Filed: June 26, 2007
    Publication date: August 21, 2008
    Inventors: Akiko GOTOU, Hironori KAMIYAMA
  • Publication number: 20080058207
    Abstract: The invention provides a heat sensitive recording material comprising heat sensitive recording layer provided on a support and having a hollow particle and a heat sensitive coloring component.
    Type: Application
    Filed: September 4, 2007
    Publication date: March 6, 2008
    Applicant: FUJIFILM CORPORATION
    Inventor: Kunihiko Ohga
  • Patent number: 7169737
    Abstract: An object of the present invention is to provide a novel phenolic compound, and a recording material containing the same, which is excellent in storage stability. The object can be achieved by a phenolic compound represented by the formula (I): [wherein m represents an integer of 0 to 2; R1 and R2 each independently represents a C1–C6 alkyl group or a C1–C6 alkoxy group; p and q each independently represents an integer of 0 to 4; t and u each independently represents 0 or 1 and do not simultaneously represent 0; and X represents a group represented by any of the formulas (II) to (VII): (wherein R3, R4, R5, R6, R7, R8, R9, R10 and R11 each independently represents a hydrogen atom or a C1–C6 alkyl group; a represents an integer of 1 to 6; b represents an integer of 0 to 4; and c represents an integer of 0 to 6)] and a recording material containing the same.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: January 30, 2007
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Tomoya Hidaka, Tadashi Kawakami
  • Patent number: 7071145
    Abstract: A thermosensitive recording material comprising a thermosensitive layer provided on a substrate, and the thermosensitive layer comprises as main ingredients a leuco dye and a developer to make colored state of said leuco dye when heated, wherein the developer is an oligomer composition obtained from the reaction of a polyvalent isocyanate compound represented by following Formula (I) with an aromatic amine represented by following Formula (II); where X represents a try- or more-valent group, a represents an integer numeral of 3 or more, b and c represent respectively integer numerals in the range of 0 to 5 and they satisfy a relation of b+c=1 to 5, Z represents hydrogen atom, alkyl group, allyl group or aryl group, and the aryl group may include condensed ling structure thereof, and d represents an integer numeral in the range of 0 to 4.
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: July 4, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Mitsunobu Morita, Kunio Hayakawa, Masafumi Torii, Mitsuru Naruse
  • Patent number: 6984608
    Abstract: The present invention relates to a method of manufacturing heat sensitive recording material for the bar code reader wavelength range of 660–690 nm, the recording material containing a base layer and a coating, and the coating containing at least a color former and a developer. The method of the invention is characterized in that the color former and the developer are selected so that when the reflectance of the color former-developer compound on the recording material is determined, it remains below a target curve determined with a function Hp=1.775*Ap22*10?61, where Hp is the reflectance percent and Ap the wavelength (nm) used in the bar code reader.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: January 10, 2006
    Assignee: Jujo Thermal Oy
    Inventors: Jouka Makitalo, Elina Mattila
  • Patent number: 6960553
    Abstract: Disclosed is a heat-sensitive recording material having excellent properties such as high color-forming sensitivity (excellent thermal response), a high formed color density, freedom from ground fogging and excellent retainability of recorded image. The heat-sensitive recording material has a heat-sensitive recording layer containing (1) at least two diphenylsulfone derivatives, (2) a combination of a diphenylsulfone derivative with a hydroxybenzoic acid derivative, (3) a combination of a diphenylsulfone derivative with a diphenyl ether derivative, (4) a combination of a diphenylsulfone derivative with salicylamide or a derivative thereof, or (5) a combination of 4,4?-dihydroxydiphenylsulfone, salicylanilide and dibenzyloxalate.
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: November 1, 2005
    Assignee: Mitsubishi Paper Mills Ltd.
    Inventors: Takahisa Kato, Hidetaka Tsukada, Shoji Hizatate, Shigetoshi Hiraishi, Kiichiro Wakamatsu, Katsuya Shito, Makoto Ida
  • Patent number: 6858565
    Abstract: Disclosed is a thermosensitive recording material comprising a sheet-shaped support and a thermosensitive recording layer which is formed on at least one surface of the support and comprises a colorless or light-colored dye precursor and a color developer capable of reacting with the dye precursor and inducing color formation therein upon application of heat thereto, the color developer comprising a compound represented by the following formula (I) or analog thereof: The thermosensitive recording material has high sensitivity and can prevent white background portions from coloring and recorded images from decolorizing in an environmental resistance test.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: February 22, 2005
    Assignee: Oji Paper Co., Ltd.
    Inventors: Hirotake Fujita, Jun-Ya Kojima, Ayako Shirai, Yoshiyuki Takahashi
  • Publication number: 20040147399
    Abstract: Systems and methods of labeling optical disk recording media using black leuco dyes in an electromagnetic radiation sensitive composition are described. Black leuco dyes containing isobenzofuranone are prepared in various compositions that can include activators, radiation absorbers, non-leuco colorants, and/or a variety of carriers. The leuco dye compositions can be applied and prepared to achieve a desired visual effect upon development of the black leuco dye.
    Type: Application
    Filed: February 10, 2003
    Publication date: July 29, 2004
    Inventor: Makarand P. Gore
  • Patent number: 6716504
    Abstract: A decorative sticker sheet comprises a lining paper, an adhesive layer formed on the lining paper, a transparent plastisol layer formed on the adhesive layer, a white plastisol layer formed on the transparent plastisol layer, an ink absorption layer formed on the white plastisol layer, a print layer in which a design is printed on the ink absorption layer, and a protective coating layer formed on the print layer. The sticker sheet may also comprise a glassy particle layer. The print layer may include designs formed by photosensitive ink or temperature-sensitive ink.
    Type: Grant
    Filed: November 4, 2002
    Date of Patent: April 6, 2004
    Inventor: Sang G. Song
  • Publication number: 20040029056
    Abstract: Disclosed are a thermal recording material having a thermal recording layer containing an electron-donating dye precursor and an electron-accepting compound, wherein the thermal recording layer comprises an electron-accepting compound of the general formula (I), 1
    Type: Application
    Filed: July 15, 2003
    Publication date: February 12, 2004
    Inventor: Hidetaka Tsukada
  • Publication number: 20030087759
    Abstract: A heat-sensitive recording material includes a support having successively disposed thereon: a heat-sensitive color-forming layer containing an electron-donating colorless dye and an electron-accepting compound; and a protective layer; wherein the heat-sensitive color-forming layer contains a water-soluble polymer and 4-hydroxybenzenesulfonanilide as the electron-accepting compound, and the protective layer contains at least one inorganic pigment selected from aluminum hydroxide, kaolin and amorphous silica. The electron-donating colorless dye is preferably at least one selected from 2-anilino-3-methyl-6-di-n-butylaminofluoran, 2-anilino-3-methyl-6-di-n-amylaminofluoran and 2-anilino-3-methyl-6-(N-ethyl-N-p-benzyl)aminofluoran.
    Type: Application
    Filed: July 3, 2002
    Publication date: May 8, 2003
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Masayuki Iwasaki, Tsutomu Watanabe, Hirofumi Mitsuo
  • Patent number: 6503868
    Abstract: A reversible thermosensitive coloring composition including an electron donating coloring agent and an electron accepting color developer, wherein the composition achieves a colored state when heated at a temperature not lower than a coloring temperature and then cooled at a cooling speed (a), and the composition in the colored state achieves a non-colored state when heated at a temperature lower than the coloring temperature and not lower than an erasing temperature, or when heated at a temperature not lower than the coloring temperature and then cooled relatively slowly compared to the cooling speed (a), and wherein the electron accepting color developer includes a phenolic compound having the following formula (1): wherein n is an integer of from 1 to 3; m is an integer of from 1 to 20; r is 0 or an integer of from 1 to 3; X and Y independently represent a divalent group including a hetero atom; R1 represents a hydrocarbon group having from 1 to 20 carbon atoms; and R2 represents a hydroc
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: January 7, 2003
    Assignee: Ricoh Company, Ltd.
    Inventors: Masafumi Torii, Hiroaki Matsui, Masaru Shimada
  • Patent number: 6486094
    Abstract: A thermosensitive recording material having high whiteness and resistance to color formation under high temperature, high humidity conditions has a thermosensitive colored image-forming layer formed on a substrate sheet and includes a dye precursor, a binder and a color developing agent including a compound of the formula (I) and optionally a compound of the formula (V). R1, R3=unsubstituted or methyl or chlorine-substituted aryl group, R2=at least C3 divalent organic group, R4=at least C3 alkyl, aralkyl or aryloxyalkyl group.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: November 26, 2002
    Assignee: Oji Paper Co., Ltd.
    Inventors: Ayako Shirai, Yoshiyuki Takahashi
  • Patent number: 6417137
    Abstract: A transparent thermosensitive recording material capable of producing an image therein has a transparent support and a thermosensitive recording layer formed thereon, the recording layer containing a colorless or light-colored leuco dye, a color developer capable of inducing coloring formation in the leuco dye, and a binder resin. The image obtained in the recording material exhibits an absorbance of 3.0 or more at 610 nm when the image has a maximum transmission density, and the ratio of the absorbance at 700 nm to the absorbance at 610 nm is in a range of 0.1 to 0.3 within the region from a transmission density of the image of 1.0 to the maximum transmission density thereof.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: July 9, 2002
    Assignee: Ricoh Company Ltd.
    Inventors: Hideo Suzaki, Hitoshi Shimbo
  • Patent number: 6403528
    Abstract: An electron accepting developer useful for producing visible images by reaction with an electron donor in carbonless paper and photo- imaging systems, the developer comprising an acid-treated, water insoluble alkali metal-modified, inorganic oxide or an acid-treated molecular sieve.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: June 11, 2002
    Assignee: Rentech, Inc.
    Inventors: Dale R. Shackle, Benjamin Chaloner-Gill
  • Patent number: 6395680
    Abstract: A composition includes at least two aromatic carboxylic acid compounds selected from the group consisting of aromatic carboxylic acid compounds of formulas (I), (II) and (III) as specified in the specification. A thermosensitive recording material has a support, and a thermosensitive coloring layer formed thereon which contains a leuco dye and a color developer capable of inducing color formation in the leuco dye upon application of heat thereto, with the color developer comprising the aforementioned composition of the aromatic carboxylic acid compounds.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: May 28, 2002
    Assignees: Ricoh Company, Ltd., Nicca Chemical Co., Ltd.
    Inventors: Mitsunobu Morita, Kunio Hayakawa, Ikuo Kameoka, Xiaonan Yang
  • Patent number: 6387584
    Abstract: A photoimaging material which comprises a support and a photoimaging layer formed on the support. The photoimaging layer comprises microcapsules and a reducing agent present outside the microcapsules. The microcapsules contain a leuco dye capable of oxidative color formation, a photooxidizing agent and an organosulfur antioxidant. The reducing agent is 2,2′-methylenebis(4-methyl-6-t-butylphenol) or 2,2′-methylenebis(4-ethyl-6-t-butylphenol). The photoimaging material is capable of thermal image fixing based on a method of forming color by radical oxidation of various leuco dyes to the corresponding dyes with a photooxidizing agent. The photoimaging material is not prone to background coloring (fogging) during storage under dark or light conditions after image fixing, and does not foul the inside of the apparatus during thermal image fixing.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: May 14, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kensuke Ikeda, Makoto Ono
  • Publication number: 20020045548
    Abstract: A heat-sensitive recording sheet comprises an electron donative leuco dye, an acidic developer for developing the dye, and a sensitizer. The acidic developer has a main component of a phenolic compound that contains a sulfonyl group in a molecule. The sensitizer comprises an amide compound, N-(4-tolyl) -phenylacetic amide. An amide compound to be mixed with the N-(4-tolyl)-phenylacetic amide for use in the sensitizer is at least one compound selected from the group consisting of N -cyclohexylphenylacetic amide, N-phenylphenylacetic amide, N-(2-tolyl)phenylacetic amide, N-phenylphenoxyacetic amide, N-(4-tolyl)phenoxyacetic amide, N-phenyl-(4-tolyloxy)acetic amide and N-(4-tolyl)-(4-tolyloxy)acetic amide.
    Type: Application
    Filed: May 3, 2001
    Publication date: April 18, 2002
    Inventor: Toranosuke Saito
  • Patent number: 6310002
    Abstract: A novel pressure sensitive record material suitable for use for high temperature reprographic equipment is disclosed comprising a sheet support carrying isolated droplets of an oil solution of chromogenic material, said isolated droplets being confined within respective pressure rupturable barriers, and, on the opposite surface of the same sheet or on a different sheet support, a coating of a acidic developer material effective to develop the color of the chromogenic material in solution on contact, wherein, the pressure rupturable barrier comprises microcapsules having a wall material formed from polymerization of melamine and formaldehyde, methylol melamine methylated methylol melamine, urea and formaldehyde, dimethylol urea or methylated dimethylol urea, with a copolymer of acrylic acid and alkyl acrylate; the oil solution comprises a blend of (i) a vegetable oil having a degree of unsaturation greater than 30% such as canola oil, soybean oil, corn oil, sunflower oil, or cottonseed oil with (ii) alkyl este
    Type: Grant
    Filed: March 7, 2000
    Date of Patent: October 30, 2001
    Assignee: Appleton Papers Inc.
    Inventors: Michael Curley Krzoska, Troy Ronald Seehafer
  • Patent number: 6037308
    Abstract: Diphenyl sulfone crosslinking type compounds of general formula (1) and a recording material containing at least one of them. This recording material is excellent in the storage stability of colored images.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: March 14, 2000
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Takehiro Sato, Hiroshi Fujii, Shinichi Sato, Izuo Aoki
  • Patent number: 6028030
    Abstract: A thermal sensitive recording medium which further contains poly urea compound in the thermal color developing layer containing dye precursor and color developer, which displays an excellent image preservative stability. Said poly urea compound contains units of a structure represented by general formula (1), and further contains a repeating unit represented by general formulae (2).about.(7). ##STR1## In these formulae A.sup.1 .about.A.sup.7 are a divalent group, R.sup.1 .about.R.sup.5 are an alkyl group, an alkoxy group or an electron accepting group, o, p, and q are an integer from 0 to 4, r is an integer from 2 to 12 and s and t are an integer from 0 to 8.
    Type: Grant
    Filed: March 4, 1998
    Date of Patent: February 22, 2000
    Assignee: Nippon Paper Industrie Co., Ltd.
    Inventors: Tomoyuki Nakano, Koichi Yanai, Junko Seki, Reiji Ohashi, Hidetoshi Yoshioka
  • Patent number: 6015771
    Abstract: The present invention discloses a novel thermally-responsive record material having coated thereon a thermally sensitive color forming composition comprising a chromogenic material, an acidic developer material and a carbamate of the formula ##STR1## wherein R is selected from alkyl, aryl or aralkyl. The alkyl moiety in each of the preceding is selected to be of from one to eight carbons. The novel record material displays enhanced image intensity or improved thermal response.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: January 18, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Mark Robert Fisher, John Charles DeBraal, Guido Steffan, Peter P. Wenzl
  • Patent number: 6001518
    Abstract: A reversible heat-sensitive recording medium has a substrate where a reversible heat-sensitive recording layer and a protective layer are successively formed on top of it. The reversible heat-sensitive recording layer is formed by a reversible heat-sensitive recording material including a leuco dye and a color developing/reducing agent. The color developing/reducing agent is a combination of two kinds of color developing/reducing agents, one with a high color developing ability and the other with high image preservation and stabilization capabilities. The two agents are combined at a ratio between 1:4 to 4:1. Thus a reversible heat-sensitive recording material with a fine color developing ability and high image preservation and stabilization capabilities can be obtained.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: December 14, 1999
    Assignee: Kyodo Printing Co., Ltd.
    Inventors: Haruhiko Ohsawa, Shin-ichi Koizumi, Hiroyuki Morinaka, Minoru Fujita
  • Patent number: 5977020
    Abstract: A thermosensitive reversible recording material capable of forming and holding clear colored images with a high contrast and capable of being repeatedly color-developed and color-erased many times, has a thermosensitive recording layer formed on substrate sheet and including (A) at least one reversibly color-developing and -erasing compound selected from those of the formulae (I), (II) and (III), and (B) at least one dye precursor compound of the formula (IV). ##STR1## R.sup.1 =naphyl or lower alkoxy-substituted phenyl group Y.sup.1, Y.sup.2 =--NHCO--, --SCONH--, --CONHCO--, etc., n, m, p=10 to 29, R.sup.2, R.sup.3, R.sup.4, R.sup.5 =C.sub.1 -C.sub.9 alkyl, C.sub.3 -C.sub.6 cycloalkyl or substituted or non-substituted phenyl group, R.sup.6, R.sup.7 =C.sub.1 -C.sub.6 alkyl or phenyl group.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: November 2, 1999
    Assignee: Oji Paper Co., Ltd.
    Inventors: Makoto Nishioka, Kazuo Yamane
  • Patent number: 5955225
    Abstract: A reversible thermosensitive composition including a coloring agent and a developer and capable of assuming a colored state and a discolored state depending upon the thermal hysteresis thereof. The developer is a phenol compound represented by the formula: ##STR1## wherein R.sup.1 and R.sup.3 represent, independently from each other, a substituted or non-substituted hydrocarbon group, R.sup.2 represents a substituted or non-substituted aliphatic hydrocarbon group having at least two carbon atoms, with the proviso that the total number of carbon atoms of R.sup.1, R.sup.2 and R.sup.3 is at least 8, X and Y represent, independently from each other, a divalent group having a nitrogen atom or an oxygen atom and r is an integer of between 1 and 3.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: September 21, 1999
    Assignee: Ricoh Company Ltd.
    Inventors: Hiromi Furuya, Masafumi Torii, Masaru Shimada, Fumio Kawamura, Kyoji Tsutsui, Katsushi Sugiyama, Katsuaki Kokubo, Katsuhisa Kamio, Kazuo Hosoda, Masafumi Moriya
  • Patent number: 5942377
    Abstract: A reversible thermosensitive composition including a coloring agent and a developer and capable of assuming a colored state and a discolored state depending upon the thermal hysteresis thereof. The developer is a phenol compound represented by the formula: ##STR1## wherein R.sup.1 represents a substituted or non-substituted divalent hydrocarbon group having at least two carbon atoms, R.sup.2 represents a substituted or non-substituted hydrocarbon group, X and Y represent, independently from each other, a divalent group having a hetero atom and r is an integer of between 1 and 3. A reversible thermosensitive recording medium includes a support and a thermosensitive layer including the above composition.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: August 24, 1999
    Assignees: Ricoh Company, Ltd., Miyoshi Yushi Kabushiki Kaisha
    Inventors: Masafumi Torii, Tadafumi Tatewaki, Hiroaki Matsui, Hiromi Furuya, Kyoji Tsutsui, Masaru Shimada, Katsushi Sugiyama, Katsuaki Kokubo, Katsuhisa Kamio, Kazuo Hosoda, Masafumi Moriya
  • Patent number: 5932515
    Abstract: A developer sheet for use in pressure-sensitive carbonless paper which incorporates a hollow microspherical plastic pigment.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: August 3, 1999
    Assignee: The Mead Corporation
    Inventor: John Kevin Rourke
  • Patent number: 5928988
    Abstract: A thermosensitive reversible recording material having a thermosensitive recording layer formed on a substrate sheet and including a substantially colorless dye precursor and a color developing agent capable of reversibly color-developing and erasing the dye-precursor, in which the color developing agent comprises an aromatic compound of the general formula (1) and optionally an overcoat layer preferably containing an electron-beam or ultraviolet-ray cured polymer is formed on the thermosensitive recording layer general formula (1): ##STR1## ?R=naphthyl or lower alkoxy-substituted phenol group, Y=--NHCO--, --SCONH--, --CONHCO--, --NHCONH--, --OCO--, --NHCOO--, --NHCOS--, --S--, --NHCONHSO.sub.2 --, --O--, --OCSNH--, --CONHNH--, --OCONHSO.sub.2 --, --CO--, --SCSNH--, --NHSO.sub.2 --, --CONHSO.sub.2 --, --OSO.sub.
    Type: Grant
    Filed: December 3, 1997
    Date of Patent: July 27, 1999
    Assignee: OJI Paper Co., Ltd.
    Inventors: Kazuo Yamane, Makoto Nishioka
  • Patent number: 5922641
    Abstract: A coated front sheet useful in carbonless copy forms. The sheet has a moisture resistant coating of latex binder, color developer, and pigment in association with a substrate. The coating is formulated to permit formation of a legible image in use in the carbonless copy form, and to minimize the adverse effects of humid weather conditions. The substrate is resistant to degradation by moisture, and may be a moisture resistant polymer or paper impregnated with the moisture resistant coating.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: July 13, 1999
    Assignee: Moore Business Forms, Inc.
    Inventors: Rodney E. Williams, Kenneth D. Riggs
  • Patent number: 5891823
    Abstract: A reversible thermosensitive medium having a support and a thermosensitive layer, the layer comprising a composition including a coloring agent and a developer and capable of assuming a colored state and a discolored state depending upon the thermal hysteresis thereof. The developer is a phenol compound represented by the formula: ##STR1## wherein n is an integer of between 1 and 3, X represents a divalent group having a nitrogen atom or an oxygen atom, R.sup.1 represents a substituted or non-substituted aliphatic hydrocarbon group having at least two carbon atoms and R.sup.2 represents a hydrocarbon group. A reversible thermosensitive recording medium has a thermosensitive recording layer containing the above composition.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: April 6, 1999
    Assignee: Ricoh Company Ltd.
    Inventors: Masafumi Torii, Hiroaki Matsui, Hiromi Furuya, Fumio Kawamura, Kyoji Tsutsui, Katsushi Sugiyama, Katsuaki Kokubo, Katsuhisa Kamio, Kazuo Hosoda, Masafumi Moriya
  • Patent number: RE37034
    Abstract: A reversible thermosensitive recording material is disclosed, which comprises (a) a support, (b) a reversible thermosensitive recording layer formed thereon which comprises as the main components a matrix resin and an organic low-molecular-weight material dispersed in the matrix resin, and has a temperature-dependent transparency, and (c) an overcoat layer comprising as the main component a resin or an ultraviolet-light-setting resin, formed on the reversible thermosensitive recording layer.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: January 30, 2001
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiko Hotta, Keishi Kubo