Heavy Metal Reactant Patents (Class 503/210)
  • Patent number: 8642504
    Abstract: The present invention provides a composition, which comprises an aqueous solvent and forms a transparent colorless coating, which yields markings of high contrast on exposure to energy. It also provides a process for the preparation of these compositions, substrates coated with these compositions and a process for their preparation, a process for preparing marked substrates using these compositions and marked substrates obtainable by the latter process.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: February 4, 2014
    Assignee: Gill Jennings & Every LLP
    Inventors: Jonathan Campbell, William Walker, Alan Platt, John Whitworth, Karen O'Donoghue, Ann Hunt, Howard Roger Dungworth, John Mark Plonka
  • Patent number: 8278243
    Abstract: An ink formulation comprises a marking component and a metal salt that absorbs laser irradiation at 700-2000 mn and thereby causes the marking component to change colour. A copper salt in particular allows effective marking with a diode or CO2 laser.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: October 2, 2012
    Assignee: Datalase Ltd.
    Inventors: Nazir Khan, Martin Robert Walker
  • Publication number: 20090181332
    Abstract: Mixtures of an alkyl vinyl ether/maleic anhydride copolymer or an alkylethylene/maleic anhydride copolymer with cellulose acetate provide protective overcoats for thermally developable materials. These protective overcoats exhibit good adhesion to the emulsion layer, are physically hard, and have good optical clarity while maintaining the sensitometric properties of the materials.
    Type: Application
    Filed: January 14, 2008
    Publication date: July 16, 2009
    Inventors: William Donald Ramsden, Chaofeng Zou, Doreen Catherine Lynch, Stacy Marie Ulrich, Sharon Mary Simpson
  • Patent number: 7063888
    Abstract: An image supporting member that fixable supports a color toner image has a base material, a light scattering layer formed on the base material and containing a white pigment and a thermoplastic resin, and a color toner receiving layer formed on the light scattering layer and containing at least a thermoplastic resin, wherein the thermoplastic resin of the light scattering layer is made of a polyolefin or a polyolefin copolymer, a temperature T at which the viscosity becomes 5×103 Pa·s being 120° C. or higher, and the thermoplastic resin of the color toner receiving layer is a polyolefin copolymer, a temperature t at which the viscosity becomes 103 Pa·s being from 90 to 120° C. Further, an image forming apparatus using this image supporting member is also provided.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: June 20, 2006
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Osamu Ide
  • Patent number: 7033743
    Abstract: A substantially light-insensitive black and white monosheet thermographic recording material has a support and on one side of the support comprises a thermosensitive element, a barrier layer and an outermost protective layer, the thermosensitive element being exclusive of a high contrast agent and containing at least one substantially light-insensitive silver salt of a carboxylic acid, at least one reducing agent therefor in thermal working relationship therewith, at least one toning agent and at least one binder, wherein the at least one reducing agent is an ortho-dihydroxy-benzene derivative and the barrier layer comprises a copolymer comprising vinyl chloride units and vinyl acetate and/or vinyl alcohol units, a copolymer comprising styrene units and acrylonitrile units, a copolymer comprising cationic units and/or a copolymer comprising styrene units and maleic acid units.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: April 25, 2006
    Assignee: Agfa Gevaert
    Inventors: Ingrid Geuens, Frank Loewet, Peter Michiels
  • Patent number: 7008748
    Abstract: Thermally developable materials such as thermographic and photothermographic materials include a co-precipitate comprising first and second organic silver salts, the first organic silver salt comprising a silver salt of a nitrogen-containing heterocyclic compound containing an imino group, and the second organic silver salt comprising a silver salt of a mercaptotriazole. The first organic silver salt can be used in the imaging process as a source of reducible silver ions, and the second organic silver salt can be a source of a toning agent. The co-precipitate can be prepared using double-jet precipitation techniques to provide an aqueous dispersion that can be used in imaging formulations.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: March 7, 2006
    Assignee: Eastman Kodak Company
    Inventors: Dirk J. Hasberg, Doreen C. Lynch, Kui Chen-Ho, Chaofeng Zou
  • Publication number: 20040157736
    Abstract: An image supporting member that fixable supports a color toner image has abase material, a light scattering layer formed on the base material and containing a white pigment and a thermoplastic resin, and a color toner receiving layer formed on the light scattering layer and containing at least a thermoplastic resin, wherein the thermoplastic resin of the light scattering layer is made of a polyolefin or a polyolefin copolymer, a temperature T at which the viscosity becomes 5×103 Pa·s being 120° C. or higher, and the thermoplastic resin of the color toner receiving layer is a polyolefin copolymer, a temperature t at which the viscosity becomes 103 Pa·s being from 90 to 120° C. Further, an image forming apparatus using this image supporting member is also provided.
    Type: Application
    Filed: September 9, 2003
    Publication date: August 12, 2004
    Applicant: Fuji Xerox Co., Ltd.
    Inventor: Osamu Ide
  • Publication number: 20040092398
    Abstract: A thermally imageable element can be imaged using heat alone without the need for photosensitivity or post-imaging processing. The element contains image-forming chemistry that comprises i) image precursor chemistry and ii) a catalyst or a catalyst precursor that upon imagewise heating is capable of promoting thermally induced image formation with the image precursor chemistry. The image-forming chemistry i) and ii) components are in reactive association and uniformly dispersed or dissolved within a binder in one or more layers of the element. Thus, the element is capable of being thermally addressed to provide a visible image as a result of thermally induced catalytic transformation of the image-forming chemistry.
    Type: Application
    Filed: June 30, 2003
    Publication date: May 13, 2004
    Inventors: Mark Lelental, Henry J. Gysling, David F. Jennings
  • Patent number: 6472131
    Abstract: A non-photosensitive silver dimer compound comprises two different silver salts, provided that when the two different silver salts comprise straight-chain, saturated hydrocarbon groups as the silver coordinating ligands, those ligands differ by at least 6 carbon atoms. Many of these silver dimer compounds can be represented by the following Structure I: wherein each E is independently oxygen, sulfur, nitrogen, selenium, or tellurium, R and R′ are different alkyl groups, aryl groups, aromatic heterocyclic groups, or halo atoms, provided that when E is oxygen, R and R′ are both straight-chain, saturated hydrocarbon groups, those hydrocarbon groups differ from each other by at least 6 carbon atoms. These silver dimer compounds are useful in thermally-developable imaging materials including thermographic and photothermographic materials.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: October 29, 2002
    Assignee: Eastman Kodak Company
    Inventor: David R. Whitcomb
  • Patent number: 6465167
    Abstract: A non-photosensitive core-shell silver salt can be used in thermographic and photothermographic imaging compositions and materials. This core-shell silver salt includes one or more silver salts in the core, at least one of which is different from the one or more silver salts used in the shell. The molar ratio of the different silver salts in the core and shell is from about 0.01:1 to about 100:1.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: October 15, 2002
    Assignee: Eastman Kodak Company
    Inventors: David R. Whitcomb, Oanh Pham
  • Patent number: 6440896
    Abstract: The invention relates to an imaging member comprising at least one light insensitive layer comprising an oxidant and a multifunctional dye-forming coupler. It further relates to a method of imaging comprising providing an imaging member comprising at least one light insensitive layer comprising a catalytic center and multifunctional dye-forming coupler, imagewise applying a first developer solution that will react with said multifunctional dye-forming coupler, imagewise applying a second developer solution that will react with multifunctional dye-forming coupler, wherein said first developer solution and said second developer solution produce different colors.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: August 27, 2002
    Assignee: Eastman Kodak Company
    Inventors: Richard P. Szajewski, Lyn M. Irving
  • 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: 6383982
    Abstract: A color developer composition comprising (A) a color developer containing a polyvalent metal salt of a salicylic acid derivative, and (B) a polyester polyol having in the molecule skeleton at least one carbonate bond or ester bond, and a derivative thereof, an aqueous dispersion and a color developing ink using this color developer composition, and a recording sheet having a layer containing this color developer composition on a base material.
    Type: Grant
    Filed: May 2, 2000
    Date of Patent: May 7, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Jotaro Kida, Yoshimitsu Tanabe, Nobuhiro Takizawa, Masakatsu Nakatsuka
  • Patent number: 6355408
    Abstract: A non-photosensitive core-shell silver salt can be used in thermographic and photothermographic imaging compositions and materials. This core-shell silver salt includes one or more silver salts in the core, at least one of which is different from the one or more silver salts used in the shell. The molar ratio of the different silver salts in the core and shell is from about 0.01:1 to about 100:1.
    Type: Grant
    Filed: January 17, 2001
    Date of Patent: March 12, 2002
    Assignee: Eastman Kodak Company
    Inventors: David R. Whitcomb, Oanh Pham
  • Patent number: 6310001
    Abstract: A substantially light-insensitive thermographic recording material substantially exclusive of cationic surfactants in which at least one non-cationic surfactant is present, the thermographic recording material comprising a support and a thermosensitive element containing a substantially light-insensitive organic silver salt, a reducing agent therefor in thermal working relationship therewith and a binder, wherein all the non-cationic surfactants present in the thermographic recording material together have a non-fluoro-halide ion concentration of 1500 ppm or less; and a process for the production thereof.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: October 30, 2001
    Assignee: Agfa-Gevaert
    Inventors: Carlo Uyttendaele, Jan Gilleir, Ingrid Geuens, Ivan Hoogmartens
  • Patent number: 6306573
    Abstract: A recording material comprising a support, a thermosensitive element and a protective layer therefor, the thermosensitive element comprising a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith and a binder, wherein the thermosensitive element further comprises in reactive association with the substantially light-insensitive organic silver salt and the organic reducing agent a substituted, exclusive of groups having an exclusively electron withdrawing character, or unsubstituted compound with an unsaturated 5-membered heterocyclic ring annulated with an aromatic ring system, the ring consisting of nitrogen and carbon atoms with at least one of the nitrogen atoms having a hydrogen atom and none of the carbon atoms being directly linked to a sulfur atom or being part of a carbonyl-group; a production process therefor and a thermal image recording process utilizing the recording-material.
    Type: Grant
    Filed: December 13, 1999
    Date of Patent: October 23, 2001
    Assignee: Agfa-Gevaert
    Inventors: Bartholomeus Horsten, Johan Loccufier, Geert Defieuw, Luc Leenders
  • Publication number: 20010031436
    Abstract: There is disclosed a nanoparticulate dispersion of a silver carboxylate particles having on the surface of the particles a surface modifier which is a nonionic oligomeric surfactant based on vinyl polymer with an amido function. In particular, the surface modifier is acrylamide, methacrylamide or derivatives thereof. Also disclosed are various compositions including the dispersions including oxidation-reduction imaging forming compositions, thermographic elements and photothermographic compositions and elements. The preferred carboxylate is a silver salt of a long chain fatty acid such as silver behenate.
    Type: Application
    Filed: January 18, 2001
    Publication date: October 18, 2001
    Applicant: Eastman Kodak Company
    Inventors: Mark Lelental, Alan R. Pitt, David A. Dickinson, James L. Wakley, Peter J. Ghyzel
  • Publication number: 20010029001
    Abstract: There is disclosed an oxidation-reduction imaging forming composition comprising an aqueous based dispersion of (i) nanoparticulate silver carboxylate particles having on the surface of the particles a surface modifier which is a phosphoric acid ester and (ii) an organic reducing agent. In particular, the surface modifiers can be mixtures of mono- and di-esters of orthophosphoric acid and hydroxyl-terminated, oxyethylated long-chain alcohols or oxyethylated alkyl phenols or derivatives thereof. Also disclosed are various compositions including the dispersions including oxidation-reduction imaging forming compositions, thermographic elements and photothermographic compositions and elements. The preferred carboxylate is a silver salt of a long chain fatty acid such as silver behenate.
    Type: Application
    Filed: January 18, 2001
    Publication date: October 11, 2001
    Applicant: Eastman Kodak Company
    Inventors: Mark Lelental, David A. Dickinson, James L. Wakley, Michael W. Orem, Peter J. Ghyzel
  • Patent number: 6296999
    Abstract: A substantially light-insensitive black and white thermographic material comprising a polymeric or polymer-coated support, a subbing layer on the support and on the same side of the support as the subbing layer a thermosensitive element containing a substantially light-insensitive organic silver salt, a reducing agent therefor in thermal working relationship therewith and a binder, wherein the subbing layer contains a binder, less than 20% by weight of silica and covalently bonded acid groups in the binder, if present, are either substantially present as free acid or substantially present as acid salts and has a leachable non-fluoro-halide ion content into water at room temperature over a period of 120 minutes of less than 0.
    Type: Grant
    Filed: August 20, 1998
    Date of Patent: October 2, 2001
    Assignee: Agfa-Gevaert
    Inventors: Carlo Uyttendaele, Ingrid Geuens, Ivan Hoogmartens
  • Patent number: 6184179
    Abstract: A thermographic recording material comprising a support and a thermosensitive element containing a substantially light-insensitive silver salt of an organic carboxylic acid, a reducing agent therefor in thermal working relationship therewith and at least one proteinaceous binder, wherein the thermosensitive element contains between 700 ppm and 5 ppm of a non-fluoro-halide ion with respect to the proteinaceous binders in the thermosensitive element and the thermographic recording material is thermally developable under substantially water-free conditions; and a process for the production thereof.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: February 6, 2001
    Assignee: Agfa-Gevaert
    Inventors: Yvan Gilliams, Carlo Uyttendaele, Ingrid Geuens, Yvan Hoogmartens
  • Patent number: 6180165
    Abstract: A substantially light-insensitive thermographic recording material substantially exclusive of cationic surfactants in which at least one non-cationic surfactant is present, the thermographic recording material comprising a support and a thermosensitive element containing a substantially light-insensitive organic silver salt, a reducing agent therefor in thermal working relationship therewith and a binder, wherein all the non-cationic surfactants present in the thermographic recording material together have a non-fluoro-halide ion concentration of 1500 ppm or less; and a process for the production thereof.
    Type: Grant
    Filed: October 13, 1999
    Date of Patent: January 30, 2001
    Assignee: Agfa-Gevaert
    Inventors: Carlo Uyttendaele, Jan Gilleir, Ingrid Geuens, Ivan Hoogmartens
  • Patent number: 5885765
    Abstract: A recording material for producing high contrast images comprising at least one thermosensitive element, comprising a layer comprising a substantially light-insensitive organic silver salt in at least one binder and in thermal working relationship therewith an organic reducing agent therefor, on a support, characterized in that the recording material is light-insensitive and the layer contains colloidal particles comprising silicon dioxide at a coating weight given by expression (1): ##EQU1## wherein B represents the total weight of all binders in the layer, AGOS represents the total weight of organic silver salt in the layer and S represents the weight of the colloidal particles in the layer; and wherein a protective layer is optionally applied to the thermosensitive element being thereby an outermost layer of the recording material.
    Type: Grant
    Filed: December 26, 1996
    Date of Patent: March 23, 1999
    Assignee: Agfa-Gevaert
    Inventors: Bartholomeus Horsten, Vankeerberghen An, Leenders Luc
  • Patent number: 5883042
    Abstract: A (photo)thermographic recording material comprising a (photo-addressable) thermosensitive element on one side of a water resistant support and an outermost backside layer on the other side of the water resistant support, the (photo-addressable) thermosensitive element comprising a substantially light-insensitive organic silver salt, an organic reducing agent for the substantially light-insensitive organic silver salt in thermal working relationship therewith(, photosensitive silver halide in catalytic association with the substantially light insensitive organic silver salt) and a binder and the outermost backside layer comprising polymeric beads, characterized in that an outermost layer on the side of the water resistant support with the (photo-addressable) thermosensitive element does not contain a fluorine-containing polymeric surfactant and the static frictional coefficient between the outermost layer on the side of the water resistant support with the (photo-addressable) thermosensitive element and the o
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: March 16, 1999
    Assignee: Agfa-Gevaert
    Inventors: Geert Defieuw, Wim Mues, Dirk Quintens, Ivan Hoogmartens
  • Patent number: 5863859
    Abstract: A heat-sensitive recording material suited for use in direct thermal imaging, wherein said recording material comprises: (i) a layer (1) containing uniformly distributed in a film-forming water-insoluble resin binder a substantially light-insensitive organic metal salt, preferably a silver salt, and (ii) a layer (2) in direct contact with said layer (1) or in thermal working relationship therewith through the intermediary of a spacer layer (3), characterized in that said layer (2) contains, uniformly distributed in a film-forming water-soluble hydrophilic binder at least one organic reducing agent that is capable of diffusing out of said layer (2) into said layer (1) on heating said recording material, and is coated from an aqueous solution.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: January 26, 1999
    Assignee: Agfa-Gevaert N.V.
    Inventors: Herman Uytterhoeven, Leo Oelbrandt, Carlo Uyttendaele
  • Patent number: 5858913
    Abstract: Receiving element for use according to transfer printing, comprising on a support a receiving layer comprising a silver source, capable of being reduced by means of heat in the presence of a reducing agent, a binder and a stabilizer selected from the group of benzotriazoles, heterocyclic mercaptanes, sulphinic acids, 1,3,4-triazo-indolizines, 1,3-dinitroaryl compounds, 1,2,3-triazoles, phthalic acids and phthalic acid derivatives.The receiving element provides images with higher stability at elevated temperatures and upon exposure to light.
    Type: Grant
    Filed: October 13, 1995
    Date of Patent: January 12, 1999
    Assignee: Agfa-Gevaert
    Inventors: Jean-Marie Dewanckele, Geert Defieuw, Marcel Monbaliu, Wilhelmus Janssens
  • Patent number: 5854174
    Abstract: A substantially non-photosensitive recording material comprising a thermosensitive element comprising a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith, a compound with an unsaturated 5-membered heterocyclic ring consisting of nitrogen and carbon atoms with at least one of the nitrogen atoms having a hydrogen atom and none of the carbon atoms being part of a thione-group, the ring not being annulated with an aromatic ring system and the compound being exclusive of 1,2,4-triazole and substituted 1,2,4-triazole compounds, in reactive association with the substantially light-insensitive organic silver salt and the organic reducing agent and a binder, on a support; and a thermal image recording process therefor.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: December 29, 1998
    Assignee: Agfa-Gevaert
    Inventors: Bartholomeus Horsten, Johan Loccufier, Geert Defieuw, Luc Leenders
  • Patent number: 5817598
    Abstract: A thermal image forming process comprising the steps of: (i) bringing an outermost layer of a recording material comprising at least one thermosensitive element, comprising a substantially light-insensitive silver salt and a reducing agent therefor in thermal working relationship therewith, on a support into contact with a heat source; (ii) applying heat from the heat source imagewise to the recording material while maintaining mutual contact to but with relative movement between the recording material and the heat source; and (iii) separating the recording material from the heat source, characterized in that the dynamic frictional coefficient during the contact between the outermost surface of the recording material and the heat source has a maximum value of less than 0.3.
    Type: Grant
    Filed: November 29, 1996
    Date of Patent: October 6, 1998
    Assignee: Agfa-Gevaert N.V.
    Inventors: Geert Defieuw, Paul Janssen, Johan Loccufier, Bart Horsten
  • Patent number: 5759953
    Abstract: A recording material comprising at least one thermosensitive element, comprising a substantially light-insensitive organic silver salt and an organic reducing agent therefor in thermal working relationship therewith, on a support, characterized in that an outermost layer of said recording material comprises at least one solid lubricant having a melting point below 150.degree. C. and at least one liquid lubricant in a binder, wherein at least one of said lubricants is a phosphoric acid derivative. The outermost layer of the recording material in contact with the heat source during the thermal image forming process may be the outermost layer of the thermosensitive element, a protective layer applied to the thermosensitive element or a layer on the opposite side of the support to the thermosensitive element.
    Type: Grant
    Filed: November 29, 1996
    Date of Patent: June 2, 1998
    Assignee: Agfa-Gevaert
    Inventors: Geert Defieuw, Jan Gilleir, Wim Mues, Robert Van Haute
  • Patent number: 5753587
    Abstract: A heat-sensitive image recording material contains on a support material1. at least one binder layer with a heat-sensitive imaging combination of an organic silver salt and an organic reducing agent for the organic silver salt, and2. at least one binder layer or a sequence of binder layers with a heat-sensitive imaging combination of an acid-sensitive leuco dye and an acidically reacting compound which acts as a developer for the leuco dye,wherein the leuco dye and developer are in thermal interaction with each other either in different layers or separately from each other in the same layer, characterised in that a layer with a water- or alcohol-soluble polymer is arranged between the combination of organic silver salt and organic reducing agent for the organic silver salt, on the one hand, and the combination of leuco dye and acidically reacting compound, on the other.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: May 19, 1998
    Assignee: Agfa-Gevaert AG
    Inventors: Wolfgang Podszun, Luc Leenders
  • Patent number: 5750464
    Abstract: There is described a novel thermographic recording film, and more specifically, a novel image-forming system incorporated therein comprising at least one layer and including and a Lewis acid material, a di- or triarylmethane thiolactone dye precursor, an acidic organic material, a binder and a thermal stabilizer.Thermographic recording films comprising the novel image-forming system of the present invention exhibit excellent thermal stability, and desirable minimum optical densities, indicative of substantially less premature image development at elevated environmental temperatures.Embodiments of the invention wherein the thermographic recording films further include a light insensitive organic silver salt, a reducing agent, a binder and, preferably, a toning agent, show substantially enhanced image density.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: May 12, 1998
    Assignee: Polaroid Corporation
    Inventors: Edward J. Dombrowski, Jr., Donna J. Guarrera, Robert L. Jones, Mark R. Mischke, John C. Warner, Jiyue Yang
  • Patent number: 5750463
    Abstract: There is described a novel thermographic recording film, and more specifically, a novel image-forming system incorporated therein which employs both thiolactone and silver reduction chemistries.Thermographic recording films comprising the novel image-forming system of the present invention exhibit excellent thermal sensitivity and visual color saturation, enhanced image density, and desirable visual minimum optical densities.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: May 12, 1998
    Assignee: Polaroid Corporation
    Inventors: Edward J. Dombrowski, Jr., Robert L. Jones, John C. Warner, Jiyue Yang
  • Patent number: 5747412
    Abstract: A (photo)thermographic recording material comprising a (photo-addressable) thermosensitive element, a support and an outermost antistatic layer, the thermosensitive element comprising a substantially light-insensitive organic silver salt, an organic reducing agent for the substantially light-insensitive organic silver salt in thermal working relationship therewith and a binder, characterized in that the outermost antistatic layer is an organic layer with a resistivity of <10.sup.10 .OMEGA./.quadrature. at a relative humidity of 30%. The outermost antistatic layer may comprise a polythiophene with conjugated polymer backbone in the presence of a polymeric polyanion compound and a hydrophobic organic polymer having a glass transition value (T.sub.g) of at least 40.degree. C., the polythiophene being present at a coverage of at least 0.001 g/m.sup.2 and the weight ratio of the polythiophene to the hydrophobic organic polymer being in the range of 1/10 to 1/1000.
    Type: Grant
    Filed: November 29, 1996
    Date of Patent: May 5, 1998
    Assignee: AGFA-Gevaert N.V.
    Inventors: Luc Leenders, Geert Defieuw, Bart Horsten, Hans Strijckers
  • Patent number: 5710095
    Abstract: A recording material comprising on the same side of a support, called the heat-sensitive side, (1) one or more layers comprising an imaging composition essentially consisting of (i) a substantially light-insensitive organic silver salt being in thermal working relationship with (ii) a reducing agent, and (2) at said same side covering said imaging composition a protective later, characterized in that said protective layer mainly comprises an organic thermosetting or moisture-hardened polymer or an organic thermosetting or moisture-hardened polymer composition.
    Type: Grant
    Filed: May 2, 1996
    Date of Patent: January 20, 1998
    Assignee: Agfa-Gevaert
    Inventors: Bartholomeus Cyriel Horsten, Guy Denis Jansen, Ronald Schuerwegen, Marc Irene Van Damme, Luc Herwig Leenders
  • Patent number: 5709738
    Abstract: Coating compositions for ink jet printing, more specifically for the CB, CF and/or CFB sheets in carbonless copy paper. The compositions include a bivalent metal salt of a C.sub.12 to C.sub.24 alkyl acid, such as calcium stearate or zinc stearate, which has been found to significantly improve ink jet print quality.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: January 20, 1998
    Inventors: Malcolm Cronlund, William P. Subsara
  • Patent number: 5652195
    Abstract: A heat-sensitive recording material suited for use in direct thermal imaging, wherein said recording material comprises in the order given:(i) a transparent polymeric support,(ii) a heat-sensitive imaging layer, and(iii) a protective layer characterized in that said protective layer is an opaque layer containing uniformly distributed in an organic hydrophilic polymeric binder at least one opacifying pigment in the form of particulate material some of which protrudes from the surface of said binder and has anti-stick properties with regard to a thermal print head, and wherein the opacity of layer (iii) corresponds with an absorption and/or scattering of at least 80% of the light of the visible wavelength range (400 to 700 nm), wherein said opaque layer has been coated from an aqueous dispersion of said opacifying pigment particles or precursors thereof.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: July 29, 1997
    Assignee: Agfa-Gevaert N.V.
    Inventors: Bartholomeus Horsten, Guy Jansen, Ronald Schuerwegen
  • Patent number: 5637550
    Abstract: A heat-sensitive recording material suited for use in direct thermal imaging and having image-stabilization properties which material contains in a binder on a support (i) a substantially light-insensitive organic silver salt capable of thermally activated reduction to silver in thermal working relationship with (ii) at least one reducing agent capable of reducing the substantially light-insensitive organic silver salt when thermally activated, characterized in that the recording material contains in conjunction, preferably in admixture, with the reducing agent(s) at least one colourless photo-oxidizing substance that on exposure to ultraviolet (UV) radiation, such as present in daylight or artificial lighting, yields free radicals capable of inactivating said reducing agent(s) by oxidation, thereby rendering said reducing agent(s) incapable of reducing said organic silver salt to silver.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: June 10, 1997
    Assignee: Agfa-Gevaert N.V.
    Inventors: Luc Leenders, Leo Oelbrandt
  • Patent number: 5587350
    Abstract: A recording material comprising on a support (i) a heat sensitive layer comprising a substantially light insensitive organic silver salt, (ii) a protective layer containing a thermomeltable particle dispersed in a binder and (iii) a reducing agent being present in the heat sensitive layer and/or any other layer of the recording material on the same side of the support carrying the heat sensitive layer.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: December 24, 1996
    Assignee: Agfa-Gevaert N.V.
    Inventors: Bartholomeus C. Horsten, Carlo A. Uyttendaele, Guy D. A. Jansen, Ronald Schuerwegen
  • Patent number: 5578548
    Abstract: A thermographic element containing: (a) a substrate; (b) an image-forming layer coated onto the substrate; and (c) overlaying the image-forming layer, a topcoat layer composed of the reaction product of (1) a polymer composed of interpolymerized units derived from: (i) about 45-65 wt % of vinyl-substituted aromatic monomer; (ii) about 15-30 wt % vinyl monomer containing a pendant nitrile group; (iii) about 5-30 wt % hydroxyl-containing; ethylenically-unsaturated monomer; and (2) a suitable crosslinking agent. A slip agent is optionally used. The topcoat layer provides a thermographic element with high gloss in the imaged areas; has excellent runnability with no chatter in the feed direction of the element; and exhibits no removal of topcoat which prevents formation of printhead-created voids in the imaged areas.
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: November 26, 1996
    Assignee: Minnesota Mining & Manufacturing Company
    Inventors: Jon A. Bjork, Ramesh C. Kumar, John C. Haidos
  • Patent number: 5559075
    Abstract: A heat-sensitive recording material suited for use in direct thermal imaging by means of an information-wise energized heating element, which recording material comprises on the same side of a support, called the heat-sensitive side, one or more binder layers containing a substantially light-insensitive metal salt in thermal working relationship with at least one organic reducing agent, characterized in that said recording material also comprises an acid-sensitive leuco dye transformable into dye by means of an acid-reacting compound serving as dye developer that stands in thermal working relationship with said leuco dye.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: September 24, 1996
    Assignee: Agfa-Gevaert
    Inventors: Luc Leenders, Luc Bastiaens
  • Patent number: 5547914
    Abstract: The present invention provides a recording material comprising on a support (i) a heat sensitive layer comprising a substantially light insensitive organic silver salt, (ii) a protective layer containing calcined China clay dispersed in a binder and (iii) a reducing agent being present in the heat sensitive layer and/or another layer on the same side of the support carrying the heat sensitive layer. The present invention further provides a method for making images therewith. The obtained images may be used in medical diagnostics.
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: August 20, 1996
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Stefaan De Meutter, Eugeen Van Goethem, Ronald Schuerwegen, Bartholmeus Horsten
  • Patent number: 5536696
    Abstract: The present invention provides a recording material comprising on a support (i) a heat sensitive layer comprising a substantially light insensitive organic silver salt, (ii) a protective layer containing a matting agent dispersed in a binder and (iii) a reducing agent being present in the heat sensitive layer and/or another layer on the same side of the support carrying the heat sensitive layer. The present invention further provides a method for making images therewith. The obtained images may be used in medical diagnostics.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: July 16, 1996
    Assignee: Agfa-Gevaert N.V.
    Inventors: Bartholomeus C. Horsten, Carlo A. Uyttendaele, Guy D. A. Jansen, Ronald Schuerwegen
  • Patent number: 5527758
    Abstract: A direct thermal imaging process wherein a non-photosensitive direct thermal recording material is heated dot-wise, and said direct thermal recording material comprises an imaging layer containing uniformly distributed in a film-forming polymeric binder (i) one or more substantially light-insensitive organic silver salts, said silver salt(s) being uniformly in thermal working relationship with (ii) one or more organic reducing agents therefor, however neither including 3,5-dihydroxybenzoic acid as acidic reagent nor di-tert-butyl-p-cresol as a sole reducing agent, characterized in that said imaging layer contains at least one polycarboxylic acid and/or anhydride thereof in a molar percentage of at least 20 with respect to said silver salt(s).
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: June 18, 1996
    Assignee: Agfa-Gevaert N.V.
    Inventors: Carlo Uyttendaele, Herman Uytterhoeven, Guy Jansen, Bartholomeus Horsten
  • Patent number: 5527757
    Abstract: A non-photosensitive heat-sensitive recording material suited for use in direct thermal imaging by means of information-wise energized heating elements, wherein said recording material comprises:(i) at least two imaging layers each containing uniformly distributed in a film-forming resin binder (1) a metal salt in thermal working relationship with (2) an organic reducing agent, and(ii) at least one heat-attenuating spacer layer for separating said imaging layers from each other.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: June 18, 1996
    Assignee: Agfa-Gevaert N.V.
    Inventors: Carlo Uyttendaele, Roland Beels, Luc Leenders
  • Patent number: 5525686
    Abstract: A process for preparing a polyvalent metal salt of a salicylic acid resin which comprises the steps of reacting salicylic acid or its derivative with styrene or its derivative at a temperature of -20.degree. C. or higher but lower than 40.degree. C. in the presence of sulfuric acid, and then reacting the resulting reaction product with a polyvalent metal compound; an aqueous dispersion in which the polyvalent metal salt of the resin is dispersed in water; and a developing sheet in which the polyvalent metal salt of the salicylic acid resin is used.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: June 11, 1996
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Yoshimitsu Tanabe, Jotaro Kida, Kiyoharu Hasegawa, Masakatsu Nakatsuka, Masayuki Furuya, Takeshi Nishimura
  • Patent number: 5489566
    Abstract: There is described, in thermographic recording films, the use of a compound containing at least two epoxide moieties in the protective layer and/or in a layer on top of the protective layer of thermographic recording films to reduce gouging and streaking of the printed image film and to reduce head build-up on the thermal printhead.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: February 6, 1996
    Assignee: Polaroid Corporation
    Inventors: Edward J. Dombrowski, John R. McPherson, Sr.
  • Patent number: 5489501
    Abstract: A recording material contains at least two coordination compounds which react to produce at least one newly produced coordination compound with the occurrence of visual changes in the recording material, which visual changes are utilized for recording.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: February 6, 1996
    Assignee: Ricoh Company, Ltd.
    Inventors: Masafumi Torii, Kunio Hayakawa
  • Patent number: 5482913
    Abstract: A dispersion of a carbonate type blocked color developer having a hydroxyl group having a color developing function which is blocked by an O-substituted oxycarbonyl group (--(C.dbd.O)OR.sub.1), and a metal salt of an organic acid or inorganic acid or a leuco dye are mixed to obtain an opaque undeveloped coating color, and the coating color is coated on paper or the like to obtain a recording sheet. Also, the coating color is further mixed with a light absorbent to obtain an opaque undeveloped coating color, which is coated on paper or the like to obtain an optical recording sheet.
    Type: Grant
    Filed: December 15, 1993
    Date of Patent: January 9, 1996
    Assignee: Nippon Paper Industries, Co., Ltd.
    Inventors: Toshimi Satake, Tomoaki Nagai, Toshiyuki Takano, Akio Sekine
  • Patent number: 5480855
    Abstract: This invention relates to thermographic recording films including both a topcoat and a washcoat. The washcoat comprises at least one quaternary ammonium salt including at least one hydroxyl functional group, and a compound containing at least two epoxide moieties. The subject washcoat, in conjunction with the topcoat, reduces printer head build-up and streaking of the printed image film while simultaneously increases the anti-stat and slip properties of the film.
    Type: Grant
    Filed: February 8, 1994
    Date of Patent: January 2, 1996
    Assignee: Polaroid Corporation
    Inventors: Edward J. Dombrowski, Robert L. Jones
  • Patent number: 5447901
    Abstract: A color-developing composition comprises a multi-valent-metal-modified salicylic acid resin (Resin A) and a polycondensation resin (resin B) at a weight ratio of 90-30 to 10-70. Resin A is composed of 5-35 mole % of a structural unit (I) and 65-95 mole % of at least one structural unit (II) or 65-95 mole % of a coupled structural unit of at least one unit (II) and at least one unit (III) and has a weight-average molecular weight of 350-5,000. Resin B is composed of the unit (II) and/or the unit (III) and has a weight-average molecular weight of 350-5,000. ##STR1## wherein Z represents M/m, M being a metal ion of m valence and m being an integer; R.sub.1 and R.sub.2 represent H or a C.sub.1-12 alkyl, aralkyl, aryl or cycloalkyl group; R.sub.3 and R.sub.6 represent H or a C.sub.1-4 alkyl group; and R.sub.4 and R.sub.5 represent H or CH.sub.3.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: September 5, 1995
    Assignee: Mitsui Toatsu Chemical, Inc.
    Inventors: Keizaburo Yamaguchi, Yoshimitsu Tanabe, Kiyoharu Hasegawa, Akihiro Yamaguchi
  • Patent number: 5446009
    Abstract: In a thermal recording sheet including an intermediate layer, and a thermal color developing layer containing a leuco dye type chromogenic component containing a leuco dye and an organic color developer as main ingredients and a metal chelate type chromogenic component containing an electron acceptor and an electron donor as main ingredients, stacked on a substrate, the intermediate layer contains a pigment having an oil absorption of 100 ml/100 g or less measured according to JIS K 5101, and the thermal color developing layer contains at least one of compounds of Formula (I) and Formula (II) as an organic color developer, a metal double salt of higher fatty acid having 16 to 35 carbon atoms as an electron acceptor, and a polyhydric hydroxy aromatic compound of Formula (III) as an electron donor, whereby providing a thermal recording sheet which is superior in dynamic sensitivity, background color, image stability such as oil resistance and plasticizer resistance, and print adaptability: ##STR1## wherein R is
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: August 29, 1995
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Toshiaki Minami, Tadakazu Fukuchi