Patents Examined by Judson R. Hightower
  • Patent number: 4055418
    Abstract: An imaging method is disclosed comprising providing an imaging member comprising a first layer of softenable material containing migration material overlying a second layer of softenable material which is substantially free of migration material wherein at least one of the layers of softenable material contains a surface skin located at the interface between the layer of softenable material. This member is latently imaged and developed by softening whereby the migration material migrates through the first layer of softenable material and the interface, where the surface skin is located, and in depth in the second layer of softenable material thereby forming an imaged member. Background of the migration material is then removed from the imaged member by splitting the member at the interface thereby obtaining an image with excellent imaging properties.
    Type: Grant
    Filed: July 23, 1975
    Date of Patent: October 25, 1977
    Assignee: Xerox Corporation
    Inventors: David A. Buckley, Frank G. Belli
  • Patent number: 4033768
    Abstract: Disclosed is a method for the preparation of a seamless belt useful as the photosensitive element in an electrostatographic copying device. The method comprises:A. applying a film or soluble material over a mandrel;B. applying a photosensitive layer over the soluble film and heat treating the photosensitive layer;C. applying a layer of conductive material over the photosensitive layer;D. applying a seamless, heat shrinkable film of a thermoplastic resin over the layer of conductive material and heat shrinking the film to form a layered, endless belt;E. removing the layered belt from the mandrel;F. contacting the belt with a solvent for the soluble film to thereby dissolve the film; andG. turning the belt inside out to provide a belt having layers from the inside out of the seamless polymeric film, the conductive material and the photosensitive layer.
    Type: Grant
    Filed: April 14, 1976
    Date of Patent: July 5, 1977
    Assignee: Xerox Corporation
    Inventor: Francis J. Wieloch
  • Patent number: 4032339
    Abstract: Photosensitive composition for use in photoelectrophoretic imaging system. The particulate component of this composition includes vanadyl phthalocyanine pigment particles which have been treated with a polymer having structural units of the formula ##STR1## WHEREIN Z is a pendant group of the formula ##STR2## X is a substituent substantially incapable of withdrawing electrons from the electron rich pyridinyl moiety;M is a whole number from 0 to 3; andN is a whole number in excess of 25.The intimate association of at least some of the polymer with at least some of the vanadyl phthalocyanine pigment is believed to effectively attenuate photoinjection of holes from the phthalocyanine pigment into the surrounding materials thereby both reducing the D.sub.min of the phthalocyanine pigment; and, to improve color separation of reproductions prepared by processes employing a subtractive color system.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: June 28, 1977
    Assignee: Xerox Corporation
    Inventors: Bernard Grushkin, Edward Forest, Leonard M. Carreira
  • Patent number: 4031021
    Abstract: A magnetic toner composition for use in decorating a magnetically imaged substrate in magnetic printing machines comprising a particulate blend of between about 50% and about 99% by weight of colored magnetic particles and between about 1% and about 50% by weight of optically innocuous, non-magnetic, frictionally electrifiable particles present as a separate phase of particles substantially non-adhering to the colored magnetic particles.
    Type: Grant
    Filed: March 25, 1974
    Date of Patent: June 21, 1977
    Inventor: Philip H. Deming
  • Patent number: 4030923
    Abstract: This invention relates to an improvement in photoconductive compositions of layered electrophotographic plates and related electrophotographic processes and particularly in the charge transport layer thereof which includes a tri-aryl pyrazoline compound in conjunction with a binder material wherein the improvement comprises the use of a tri-aryl pyrazoline compound and a mixture of binder materials comprising about 3 to 25% by weight acrylic resin and about 75 to 97% by weight polycarbonate.
    Type: Grant
    Filed: December 11, 1975
    Date of Patent: June 21, 1977
    Assignee: International Business Machines Corporation
    Inventors: Donald Lester Krause, Kenneth Dale Presley
  • Patent number: 4029502
    Abstract: An imaging system comprising providing an imaging member comprising an agglomerable layer contacting a softenable layer and imagewise softening said member to cause relative transparentizing of said member in softened areas due to an agglomeration of the agglomerable layer in softened portions of said member.
    Type: Grant
    Filed: August 26, 1968
    Date of Patent: June 14, 1977
    Assignee: Xerox Corporation
    Inventor: William L. Goffe
  • Patent number: 4028102
    Abstract: This invention relates to a compound of the formula ##STR1## wherein R is a phenylene or naphtylene group. The invention also relates to a process for making the novel compounds of the invention and also to an electrophotographic recording material employing the novel compounds of the invention.
    Type: Grant
    Filed: December 5, 1975
    Date of Patent: June 7, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jurgen Rochlitz, Reinhard Zunker
  • Patent number: 4026702
    Abstract: The electrophotographic properties of photoconductive elements sensitized by a cadmium sulfide-binder layer are improved by incorporating hydrophobic colloidal silica in the photoconductive layer.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: May 31, 1977
    Assignee: Oce-van der Grinten N.V.
    Inventors: Michiel van den Brink, Andreas C. Stoot
  • Patent number: 4025340
    Abstract: Toning an electrophotographic layer by adding materials which bleach at different rates, and thereafter selectively bleaching the materials after development.
    Type: Grant
    Filed: November 10, 1971
    Date of Patent: May 24, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masaaki Takimoto, Satoru Honjo
  • Patent number: 4025338
    Abstract: A process for machining metal work comprising forming a marked-off image from an image-forming material on a surface of a metal work or on a recording layer provided on the surface of the metal work and subsequently machining the metal work by machine cutting and/or oil immersion electrospark machining on the basis of the marked-off image, and including applying a protective resin layer on the image-bearing surface of the metal work prior to any metal machining, the resin layer comprising a mixture of nitrocellulose and a methacrylic polymer in a weight ratio ranging from about 80:20 to 40:60 of the nitrocellulose to the methacrylic polymer and not hindering the viewing of the image, and the methacrylic polymer mainly comprising methyl methacrylate and having a glass transition temperature of higher than about 85.degree. C.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: May 24, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hajime Miyatuka, Satoru Honjo
  • Patent number: 4021237
    Abstract: CdS for electrophotography is produced by contacting sulfide ion, cadmium ion and a donor impurity of Group IIIa or IIIb of the Periodic Table and firing the resulting CdS. An acceptor impurity may be added to the first step or the second step.
    Type: Grant
    Filed: November 14, 1974
    Date of Patent: May 3, 1977
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hirokuni Kawashima, Kiyoshi Suzuki
  • Patent number: 4020192
    Abstract: A xerographic reproduction process and toner carrier for use therewith, the process comprising the steps of forming an electrostatic latent image on a recording layer and developing the image with a developer comprising a toner and a carrier, the carrier comprising a core coated with an organic polymer coating containing a monomer unit selected from the group consisting of ##STR1## (wherein R.sub.1, R.sub.3, R.sub.4, and R.sub.5 is each a hydrogen atom or a hydrocarbon residue having 1 to 12 carbon atoms, and R.sub.2 is a hydrocarbon residue having 1 to 12 carbon atoms).
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: April 26, 1977
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Toll Nozaki
  • Patent number: 4019902
    Abstract: A durable photoreceptor having improved flexibility comprising a metal- or metal-coated flexible substrate and an inorganic photoconductor layer in charge blocking contact, the photoreceptor being obtained by initially bombarding the metal substrate, as cathode, with positive ions of an inert gas of low ionization potential under glow discharge in the presence of oxygen; and exposing the resulting oxide-coated substrate to a vapor cloud of photoconductor material consisting essentially of charged and uncharged material in an electrical field, utilizing the metal substrate as a cathode and a donor of said vapor cloud of photoconductor material or container thereof as an anode, the latter step being effected in combination with at least part of the initial bombardment step.
    Type: Grant
    Filed: August 15, 1975
    Date of Patent: April 26, 1977
    Assignee: Xerox Corporation
    Inventors: Lewis B. Leder, John C. Schottmiller, Harold H. Schroeder
  • Patent number: 4014695
    Abstract: An imaging method is disclosed comprising providing an imaging member comprising a first layer of softenable material containing migration material overlying a second layer of softenable material which is substantially free of migration material wherein at least one of the layers of softenable material contains a surface skin located at the interface between the layer of softenable material. This member is latently imaged and developed by softening whereby the migration material migrates through the first layer of softenable material and the interface, where the surface skin is located, and in depth in the second layer of softenable material thereby forming an imaged member. Background of the migration material is then removed from the imaged member by splitting the member at the interface thereby obtaining an image with excellent imaging properties.
    Type: Grant
    Filed: July 23, 1975
    Date of Patent: March 29, 1977
    Assignee: Xerox Corporation
    Inventors: David A. Buckley, Frank G. Belli
  • Patent number: 4013464
    Abstract: Photoconductive and radioconductive insulating compositions of desirably low dark conductivity and improved resistance to fatigue include tetragonal lead oxide, a binder of polyvinylacetate, polyvinylformal and/or polyvinylbutyral and a small effective amount of an anhydride capable of inhibiting dark conductivity in the composition, particularly under repeated use. Preferred anhydrides are phthalic and maleic anhydrides in an amount of less than about 4 percent of the weight of lead oxide in the composition. Such compositions can be carried on an electrically conductive support to provide elements that are useful for electrophotographic and electroradiographic imaging.
    Type: Grant
    Filed: December 3, 1975
    Date of Patent: March 22, 1977
    Assignee: Eastman Kodak Company
    Inventor: William A. Light
  • Patent number: 4013463
    Abstract: A durable photoreceptor having improved flexibility comprising a metal- or metal-coated flexible substrate and an inorganic photoconductor layer in charge blocking contact, the photoreceptor being obtained by initially bombarding the metal substrate, as an electrode, with both negative and positive ions of a non-metallic gas of low ionization potential under AC glow discharge in the presence of oxygen; and exposing the resulting oxidized substrate to a vapor cloud of inorganic ambipolar photoconductive material consisting essentially of positively and negatively charged and uncharged photoconductive material in a low frequency AC electrical field, utilizing the substrate as one electrode, a source of said vapor cloud of photoconductive material or adjacent structure as the other electrode, the latter functional step being effected in combination with at least part of the initial bombardment step.
    Type: Grant
    Filed: August 15, 1975
    Date of Patent: March 22, 1977
    Inventor: Lewis B. Leder
  • Patent number: 4012252
    Abstract: 3-Bromo-N-2"-pyridyl-8,13-dioxodinaphtho-(2,1-b;2',3'-d)-furan-6-carboxamid e is described as a new composition of matter along with its use in electrophotographic and photoelectrophoretic imaging processes.
    Type: Grant
    Filed: September 30, 1975
    Date of Patent: March 15, 1977
    Assignee: Xerox Corporation
    Inventors: Robert J. Gruber, Nicholas J. Germano
  • Patent number: 4011079
    Abstract: In the fabrication of an electrophotographic recording material of the type composed of selenium, selenium compounds, or alloys with selenium, the method is simplified by initially vapor-depositing the photoconductive recording material onto a carrier at a temperature below the glass transformation temperature, and then heating the recording material to a higher second temperature range between the glass transformation temperature and a temperature just below that at which the electrophotographic properties of the recording material begin to change.
    Type: Grant
    Filed: August 1, 1974
    Date of Patent: March 8, 1977
    Assignee: Licentia Patent-Verwaltungs-G.m.b.H.
    Inventors: Johannes Berle, Hartmut Dulken, Gottfried Guder, Karl-Heinz Kassel
  • Patent number: 4011080
    Abstract: A method of overcoating a conductive polymer support with an aqueous-based polymer coating comprises crosslinking the conductive polymer with hydrolyzed tetraethyl orthosilicate prior to overcoating. An electrophotographic element can be prepared by coating a support with a conductive layer comprising a conductive polymer crosslinked with hydrolyzed tetraethyl orthosilicate (polysilicic acid) and overcoating with an aqueous-based layer of an electrically insulating polymer containing a photoconductor.
    Type: Grant
    Filed: August 30, 1974
    Date of Patent: March 8, 1977
    Assignee: Eastman Kodak Company
    Inventor: John Murray McCabe
  • Patent number: 4006022
    Abstract: A recording process using at least one organic compound capable of exhibiting two or more different physical forms at the same temperature which may be converted to one another, and irradiating the organic compound with electromagnetic waves, and thereafter, converting in either the irradiated portion of the organic compound or the non-irradiated portion thereof, the physical form in existence before the irradiation with the electromagnetic waves to another physical form.
    Type: Grant
    Filed: November 19, 1973
    Date of Patent: February 1, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shuichi Ohtsuka, Seiichi Taguchi, Satoru Honjo