Patents Represented by Attorney Willard G. Montgomery
  • Patent number: 5968704
    Abstract: A transfer support and a method for fusing a transferable toner image to a face of a digital disc. In the method, a transferable toner image is electrophotographically printed onto a transfer layer. The transfer layer has a surface energy insufficient to retain the transferable toner image against a peel force of greater than about 550 Newtons/meter. The transferable image is registered against the face of the digital disc to provide a transfer support-digital disc pair. The transferable image is fused to the face of the digital disc. Registry of the transferable image and the face of the digital disc is maintained during fusing.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: October 19, 1999
    Assignee: Eastman Kodak Company
    Inventors: Jiann H. Chen, Joseph A. Pavlisko, Muhammed Aslam
  • Patent number: 5580692
    Abstract: Powders suitable as electographic toner and/or carrier particles and other powders which utilize a liquid dispersant are produced by limited coalescence techniques. The dispersant is removed by mixing the suspension of coalesced droplets with a sufficient amount of an extracting liquid to cause the dispersant to diffuse out of the coalesced droplets into the extracting liquid.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: December 3, 1996
    Assignee: Eastman Kodak Company
    Inventors: Kevin D. Lofftus, Alexandra D. Bermel
  • Patent number: 5571457
    Abstract: An electrically conductive or semi-conductive polymeric material which includes a blend of:(i) a bis[oxydiethylenebis(polycaprolactone)yl]sulfoaryldicarboxylate or a bis[oxydiethylenebis(polycaprolactone)yl]sulfonamidosulfonylaryldicarboxyl ate, and(ii) a complex of a ferric halide and ethylene glycol or an oligoethylene glycol selected from di-, tri-, or tetraethylene glycol,to provide the material with its conductive properties.The material has a resistivity of from about 10.sup.6 to about 5.times.10.sup.11 ohm cm and can be used in the fabrication of biasable transfer members such as, for example, a biasable transfer roll to transfer electrostatographic toner images from a photoconductor to a final support material such as a sheet of paper wherein the member electrically cooperates with the photoconductor to establish a directional force field therebetween.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: November 5, 1996
    Assignee: Eastman Kodak Company
    Inventors: William B. Vreeland, John C. Wilson, Mark C. Zaretsky
  • Patent number: 5554474
    Abstract: A member for electrically cooperating with a conductive support surface to attract charged toner particles from the surface towards the member is disclosed. The member comprises a conductive substrate capable of supporting a uniform bias potential thereon and at least one coating comprising a resilient elastomeric polyurethane.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: September 10, 1996
    Assignee: Eastman Kodak Company
    Inventors: William B. Vreeland, John C. Wilson, Mark C. Zaretsky
  • Patent number: 5547803
    Abstract: New electrostatographic toners and developers are provided containing charge-control agents comprising quaternary phosphonium trihalocuprate salts having the structure: ##STR1## wherein R is selected from an unsubstituted alkyl group having from 1 to 24 carbon atoms; a substituted alkyl group having from 1 to 24 carbon atoms substituted with one or more hydroxy-, carboxy-, alkoxy-, carboalkoxy-, acyloxy-, nitro-, cyano-, keto- or halo-groups; a cycloalkyl group having from 3 to 7 carbon atoms; an alkaryl group having from 1 to 20 carbon atoms in the alkyl group and 6 to 14 carbon atoms in the aryl group; an aralkyl group having from 1 to 4 carbon atoms in the alkyl group and 6 to 14 carbon atoms in the aryl group wherein the aryl group may be unsubstituted or substituted with one or more alkyl-, hydroxy, carboxy-, alkoxy-, carboalkoxy-, acyloxy-, amino-, nitro-, cyano-, keto- or halo-groups; phenyl or substituted phenyl;R.sup.1, R.sup.2 and R.sup.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: August 20, 1996
    Assignee: Eastman Kodak Company
    Inventors: John C. Wilson, Dinesh Tyagi
  • Patent number: 5541001
    Abstract: The invention provides rolls, belts and other biasable members having at least one layer or coating of an elastomeric resilient polyurethane. The polyurethane is formed by reacting:(a) a polyisocyanate prepolymer;and(b) a hardening mixture comprising:(i) a polyol and(ii) as a conductivity control agent an ammonium tetrahaloferrate salt of the formula ##STR1## The R substituents are defined in the specification.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: July 30, 1996
    Assignee: Eastman Kodak Company
    Inventors: William B. Vreeland, John C. Wilson, Mark C. Zaretsky
  • Patent number: 5516616
    Abstract: New electrostatographic toners and developers are provided containing charge-control agents comprising certain quaternary ammonium salts having good thermal stability and good charging characteristics. The quaternary ammonium salts are: N-[(3,5-di-tert-alkyl-4-hydroxybenzoyloxy)alkyl]ammonium salt or a quaternary N-[(3,5-di-tert-alkyl-4-hydroxybenzoyloxy)aryl]ammonium salt having the structure: ##STR1## wherein the substituents are as defined herein.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: May 14, 1996
    Assignee: Eastman Kodak Company
    Inventors: John C. Wilson, Dinesh Tyagi
  • Patent number: 5512407
    Abstract: New electrostatographic toners and developers are provided containing charge-control agents comprising bis(quaternary phosphonium) tetrahalomanganate salts having the structure: ##STR1## wherein R is selected from an unsubstituted alkyl group having from 1 to 24 carbon atoms; a substituted alkyl group having from 1 to 24 carbon atoms substituted with one or more hydroxy-, carboxy, alkoxy-, carboalkoxy-, acyloxy-, nitro-, cyano-, keto- or halo-groups; a cycloalkyl group having from 3 to 7 carbon atoms; an alkaryl group having from 1 to 20 carbon atoms in the alkyl group and 6 to 14 carbon atoms in the aryl group; an aralkyl group having from 1 to 4 carbon atoms in the alkyl group and 6 to 14 carbon atoms in the aryl group wherein the aryl group may be unsubstituted or substituted with one or more alkyl-, hydroxy-, carboxy-, alkoxy-, carboalkoxy-, acyloxy-, amino-, nitro-, cyano-, keto- or halo-groups; phenyl or substituted phenyl;R.sup.1, R.sup.2 and R.sup.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: April 30, 1996
    Assignee: Eastman Kodak Company
    Inventors: John C. Wilson, Dinesh Tyagi
  • Patent number: 5512404
    Abstract: Carrier particles for an electrostatographic developer comprising a mixture of particles of a hard, magnetic ferrite material having a hexagonal crystalline structure of the general formula M0.6 Fe.sub.2 O.sub.3 in which M is strontium, barium or mixtures thereof exhibiting a coercivity of at least 300 Oersteds when magnetically saturated and an induced magnetic moment of at least 20 EMU/g when in an applied magnetic field of 1000 Oersteds in which from 1.0 to 10.0% by weight of the carrier particles in the mixture, based on the total weight of the mixture, have a number average particle diameter of from 1.0 to 10.0 micrometers and from 99.0 to 90.0% by weight of the carrier particles in the mixture, based on the total weight of the mixture, have a number average particle diameter of from 11.0 to 38.0 micrometers.The carrier particles provide developer compositions for magnetic brush development having high development speeds without the loss of copy image quality.
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: April 30, 1996
    Assignee: Eastman Kodak Company
    Inventor: Bijay S. Saha
  • Patent number: 5508140
    Abstract: New electrostatographic toners and developers are provided containing charge-control agents comprising quaternary phosphonium salts having the structure: ##STR1## wherein R.sup.1 and R.sup.2 are tertiary-alkyl containing from 4 to 8 carbon atoms; R.sup.3 is selected from an unsubstituted alkyl group having from 1 to 24 carbon atoms; a substituted alkyl group having from 1 to 24 carbon atoms substituted with one or more hydroxy-, carboxy, alkoxy-, carboalkoxy-, acyloxy-, nitro-, cyano-, keto- or halo-groups; a cycloalkyl group having from 3 to 7 carbon atoms; an alkaryl group having from 1 to 20 carbon atoms in the alkyl group and 6 to 14 carbon atoms in the aryl group; an aralkyl group having from 1 to 4 carbon atoms in the alkyl group and 6 to 14 carbon atoms in the aryl group wherein the aryl group may be unsubstituted or substituted with one or more alkyl-, hydroxy-, carboxy-, alkoxy-, carboalkoxy-, acyloxy-, amino-, nitro-, cyano-, keto- or halo-groups; phenyl or substituted phenyl; andR.sup.4, R.sup.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: April 16, 1996
    Assignee: Eastman Kodak Company
    Inventors: John C. Wilson, Dinesh Tyagi
  • Patent number: 5500320
    Abstract: Carrier particles for an electrostatographic developer comprising particles of a hard, magnetic ferrite material having a hexagonal crystalline structure of the general formula MO.6 Fe.sub.2 O.sub.3 in which M is strontium, barium or mixtures thereof exhibiting a coercivity of at least 300 Oersteds when magnetically saturated and an induced magnetic moment of at least 20 EMU/g when in an applied magnetic field of 1000 Oersteds and having a number average particle diameter of from 10.0 to 38.0 micrometers.The carrier particles provide developer compositions for magnetic brush development having high development speeds without the loss of copy image quality.
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: March 19, 1996
    Assignee: Eastman Kodak Company
    Inventor: Bijay S. Saha
  • Patent number: 5491044
    Abstract: New electrostatographic toners and developers are provided containing charge-control agents comprising 3,5-di-tertiary-alkyl-4-hydroxybenzenesulfonate salts having the structure: ##STR1## The substituents are defined in the specification.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: February 13, 1996
    Assignee: Eastman Kodak Company
    Inventors: John C. Wilson, Dinesh Tyagi
  • Patent number: 5464719
    Abstract: New electrostatographic toners and developers are provided containing charge-control agents comprising ammonium tetrahaloferrate salts having the structure: ##STR1## wherein R, R.sup.1, R.sup.2 and R.sup.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: November 7, 1995
    Assignee: Eastman Kodak Company
    Inventors: John C. Wilson, Dinesh Tyagi
  • Patent number: 5462829
    Abstract: Polyblends are provided which comprise (a) a major amount of a linear or branched matrix polymer comprising a polyester having a number average molecular weight of at least 2000 or a vinyl polymer having a number average molecular weight of at least 3000 and (b) a minor amount of a block copolymer of AB or ABA type wherein A is a homopolymer block which is compatible with the matrix polymer and B is a homopolymer block which is incompatible with the matrix polymer, the blend having a fusing temperature of not more than about 250.degree. C., a melt viscosity of from about 4.times.10.sup.2 to 5.times.10.sup.4 poise as measured on a Rheometrics Dynamic Analyzer at 150.degree. C. and a frequency of 1 rad/sec and a melt elasticity of from about 1.5.times.10.sup.2 to 4.times.10.sup.4 dynes/cm.sup.2.The polyblends are useful in the preparation of electrostatographic toner compositions used in electrographic processes.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: October 31, 1995
    Assignee: Eastman Kodak Company
    Inventors: Dinesh Tyagi, Louis J. Sorriero
  • Patent number: 5459006
    Abstract: New electrostatographic toners and developers are provided containing charge-control agents comprising quaternary phosphonium tetrahaloferrate salts having the structure: ##STR1## wherein R is selected from an unsubstituted alkyl group having from 1 to 24 carbon atoms; a substituted alkyl group having from 1 to 24 carbon atoms substituted with one or more hydroxy-, carboxy, alkoxy-, carboalkoxy-, acyloxy-, nitro-, cyano-, keto- or halo-groups; a cycloalkyl group having from 3 to 7 carbon atoms; an alkaryl group having from 1 to 20 carbon atoms in the alkyl group and 6 to 14 carbon atoms in the aryl group; an aralkyl group having from 1 to 4 carbon atoms in the alkyl group and 6 to 14 carbon atoms in the aryl group wherein the aryl group may be unsubstituted or substituted with one or more alkyl-, hydroxy-, carboxy-, alkoxy-, carboalkoxy-, acyloxy-, amino-, nitro-, cyano-, keto- or halo-groups; phenyl or substituted phenyl;R.sup.1, R.sup.2 and R.sup.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: October 17, 1995
    Assignee: Eastman Kodak Company
    Inventors: John C. Wilson, Dinesh Tyagi
  • Patent number: 5459499
    Abstract: A hydrophobing agent (30) includes chain-like, cross-linkable, halogen-containing copolymers, a cross-linking agent, where the cross-linking agent enters into cross-linking bonds with the copolymers, and at least two solvents with differing boiling points. The weight of the components and the boiling points of the solvents are provided such that the first solvent is substantially already evaporated upon application on the surface (9) to be coated, whereas the second solvent evaporates substantially only after the application onto the surface (9) under formation of a hydrophobically acting layer attached to the surface (9).
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: October 17, 1995
    Assignee: Eastman Kodak Company
    Inventors: Carsten Senge, Jorg Erdmann, Jana Dahlmeier
  • Patent number: 5411600
    Abstract: Ultrathin film thermocouple devices, which are extremely small in size and thickness and flexible, allow measurement of temperatures during processing of flexible elements which flex during processing. The invention includes temperature measuring devices where the thermocouple is deposited on the flexible element being processed. Such thermocouple devices are useful in a variety of applications where conventional temperature measuring devices can not be used. Such thermocouples devices are made from a variety of thermocouple metals including copper-constantan and copper-nickel and may be fabricated on flexible substrates by evaporation. Detailed fabrication procedures are also described. These devices are surprisingly robust, able to withstand extensive flexing without alteration or deterioration in thermocouple properties, and exhibit thermal EMF's which are reproducible from sample to sample and readily measurable.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: May 2, 1995
    Assignee: Eastman Kodak Company
    Inventors: Donald S. Rimai, Raymond E. Anne, Raymond C. Bowen
  • Patent number: 5403686
    Abstract: Electrophotographic elements including near-infrared radiation absorbing sensitizers and selected near-infrared radiation absorbing additives exhibit a reduced tendency toward the formation of laser interference patterns. These elements can be utilized in electrophotographic imaging processes including the steps of electrostatically charging the element, imagewise exposing the charged element to near-infrared radiation to form an electrostatic latent image, developing the electrostatic latent image by applying charged toner particles to the element to produce a toned image, and transferring the toned image to a suitable receiver.
    Type: Grant
    Filed: September 27, 1993
    Date of Patent: April 4, 1995
    Assignee: Eastman Kodak Company
    Inventors: Douglas E. Bugner, Hsin C. Kan, Neil F. Haley, Michael R. Detty, Rodney R. Bucks
  • Patent number: 5358820
    Abstract: A method is provided for non-electrostatically transferring dry toner particles which comprise a toner binder and have a particle size of less than 8 micrometers from the surface of an element to a receiver. The element comprises a conductive substrate and a surface layer which contains an electrically insulating polymeric binder resin matrix which comprises a crystalline side chain polyester or a block copolyester or copolycarbonate having a crystalline side chain polyester block and the receiver comprises a substrate having a coating of a thermoplastic addition polymer on a surface of the substrate in which the Tg of the polymer is less than approximately 10.degree. C. above the Tg of the toner binder. The method involves contacting the toner particles with the receiver which is heated to a temperature such that the temperature of the thermoplastic polymer coating on the receiver substrate during transfer is at least approximately 15.degree. C.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: October 25, 1994
    Assignee: Eastman Kodak Company
    Inventors: Douglas E. Bugner, David S. Hays, Jeanne E. Kaeding, Steven J. Spinelli
  • Patent number: 5358815
    Abstract: This invention is directed to dry, negatively charged toner compositions and developer compositions, the toner composition being comprised of resin particles prepared from a polyester having a glass transition temperature of 50.degree. to 100.degree. C. and a weight average molecular weight of 20,000 to 100,000 and, as a charge-control agent, from about 0.
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: October 25, 1994
    Assignee: Eastman Kodak Company
    Inventors: John C. Wilson, Steven M. Bonser, Hans W. Osterhoudt