Post Treatment Process To Fix Or Transfer Image, Or Collect Or Remove Electric Radiation Sensitive Pigment Patents (Class 430/33)
  • Patent number: 10086470
    Abstract: A method for energy calibration of a pulsed cutting laser for eye surgery comprises irradiating a sample material with a plurality of sets of laser pulses of the cutting laser with pulse energies differing from set to set. This method also comprises analyzing at least one visually perceptible discoloration structure created in the sample material as a result of the irradiation, selecting the pulse energy of one of the sets based on the analysis, and setting a treatment pulse energy for the cutting laser based on the selected energy.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: October 2, 2018
    Assignee: Wavelight GmbH
    Inventor: Sissimos Lemonis
  • Patent number: 9413920
    Abstract: A scanner is disclosed. The scanner captures three exposures for each color scan line. The scanner has a first, second and third light source that each produces a different color of light. The scanner uses the first and second light source for the first exposure. The scanner uses the first and third source for the second exposure. The scanner uses the second and third light source for the third exposure.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: August 9, 2016
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Dejan Depalov, Jerry Wagner, Eric L. Anderson, Kenneth K. Smith
  • Patent number: 9034539
    Abstract: A system for processing a substrate includes a light source to provide light pulses, a stage to support a substrate, optics to focus the light pulses onto the substrate, a scanner to scan the light pulses across the substrate, a computer to control properties of the light pulses and the scanning of the light pulses such that color centers are generated in various regions of the substrate, and at least one of (i) an ultraviolet light source to irradiate the substrate with ultraviolet light or (ii) a heater to heat the substrate after formation of the color centers to stabilize a transmittance spectrum of the substrate.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: May 19, 2015
    Assignees: Carl Zeiss SMS GmbH, Carl Zeiss SMT GmbH, Carl Zeiss SMS Ltd.
    Inventors: Sergey Oshemkov, Ralph Klaesges, Markus Mengel, Vladimir Kruglyakov, Eitan Zait, Vladimir Dmitriev, Guy Ben-Zvi, Steven Labovitz
  • Patent number: 8654070
    Abstract: Electrophoretic particles including mother particles and a dispersant that covers the surface of the mother particles, the mother particles including a resin and a colorant, and the dispersant having a structure represented by the following Formula (1): wherein in Formula (1), R1 represents a dimethyl siloxane chain that comprises two or more dimethyl siloxane structures that are linked together, the dimethyl siloxane chain being optionally substituted by an organic group; R2 represents a hydrogen atom or a methyl group; Ar1 represents an organic group having an aromatic group; a represents an integer of from 8 to 88; b represents an integer of from 12 to 82; c represents an integer of from 0 to 30; f represents an integer of from 1 to 3; the total of a, b and c is 100; and the ratio of unit (b) in the dispersant having a structure represented by Formula (1) is about 50% by weight or less.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: February 18, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Nami Tokunaga, Jun Kawahara, Daisuke Nakayama, Yasuo Yamamoto, Hiroaki Moriyama
  • Patent number: 8293338
    Abstract: A method of applying a protective coating over ink printed media in a digital printing engine whereby horizontally discharging ink jet nozzles arranged in a vertical array, discharging a protective coating onto the marked surface of media disposed on a belt in vertical disposition. The coated media is then transported vertically to an adjacent source of ultraviolet radiation for curing the protective coating.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: October 23, 2012
    Assignee: Xerox Corporation
    Inventors: Vittorio Castelli, Gregory Joseph Kovacs
  • Patent number: 7972949
    Abstract: An electronic component or display device of the present invention can be provided by using a following pattern formation method. On a substrate treated with a first etching with a first resist pattern as a first mask, a second resist pattern is transfer-printed on the first resist patterns so as to partially overlap with the first resist pattern and partially extended from the first resist pattern. And then a second etching is performed by using the first resist pattern and the second resist pattern as a second mask. The first resist pattern and the second resist pattern are used for forming wirings and/or terminals, and the extended portion of the second resist pattern is used to make the wirings to have a cross section of a stair-like edge shape.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: July 5, 2011
    Assignee: NEC Corporation
    Inventor: Seiji Suzuki
  • Patent number: 7794835
    Abstract: A fixing solution for fixing toner to a recording medium, includes aliphatic ester held by solvent in a soluble manner, and having solubility or swelling property with respect to resin included in the toner.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: September 14, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuo Katano, Tsuneo Kurotori, Hiromichi Komai, Hidenori Tomono
  • Patent number: 7713622
    Abstract: A fixing solution for fixing toner to a recording medium, includes aliphatic ester held by solvent in a soluble manner, and having solubility or swelling property with respect to resin included in the toner.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: May 11, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuo Katano, Tsuneo Kurotori, Hiromichi Komai, Hidenori Tomono
  • Patent number: 7579125
    Abstract: An imaging member has a crosslinked overcoat layer which holds fluorinated nanoparticles. The overcoat layer is formed from an overcoat solution comprising a polymer binder; a hole transport molecule; fluorinated nanoparticles; a fluorinated surfactant; a crosslinking agent; and a free radical initiator. The overcoat layer provides excellent wear resistance at a low cost.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: August 25, 2009
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Satchidanand Mishra, Anthony M. Horgan, Richard L. Post, Kathleen M. Carmichael, Edward F. Grabowski
  • Publication number: 20090035672
    Abstract: To provide an electrophotographic photoconductor that comprises a support and a cross-linked layer formed over the support, wherein the cross-linked layer comprises at least light curable of radically polymerizable compound, the difference of maximum value of the post-exposure electrical potential and minimum value of the post-exposure electrical potential when writing is conducted under the condition that image static power is 0.53 mW, exposure energy is 4.0 erg/cm2 for the electrophotographic photoconductor is within 30V.
    Type: Application
    Filed: February 27, 2007
    Publication date: February 5, 2009
    Inventors: Yoshiki Yanagawa, Yoshiaki Kawasaki, Tetsuro Suzuki
  • Patent number: 7297454
    Abstract: A colorless ink jet ink composition is provided for printers for printing on both porous and hybrid glossy or semi-glossy media. The ink composition comprises a water soluble polymer or dispersed latex. The ink formulation provides substantially air fast, stain resistant, and light fastness to the printed image. Further, the ink formulation evidences improved overall image quality.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: November 20, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zeying Ma, John M Gardner, Gregg A Lane
  • Patent number: 7288347
    Abstract: A method of forming a xerographic image having at least one portion with a gloss different from a gloss of another portion of the xerographic image includes xerographically forming a toner image on a surface of a substrate and forming a finish over the toner image at the at least one portion, the finish being made of a differential gloss finish coating material that has a gloss different from that of the toner image. The differential gloss finish coating material is preferably an emulsion aggregation toner that is substantially free of pigments that adversely affect the transparency of the toner following fusing, the toner having gloss tunability through control of the amount of crosslinked portions included in the toner.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: October 30, 2007
    Assignee: Xerox Corporation
    Inventors: David J. Sanders, Raj D. Patsetl, Michael A. Hopper
  • Patent number: 7267913
    Abstract: An image forming method is disclosed, comprising (a) imagewise exposing a recording material comprising on a support an image forming layer containing colored electrophoretic particles and a photopolymerizable compositon to light to perform photocuring and (b) applying an electric field to the recording material to migrate the electrophoretic particles.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: September 11, 2007
    Assignee: Konica Minolta Holdings, Inc.
    Inventor: Noriyuki Kokeguchi
  • Patent number: 7033713
    Abstract: A method for producing an electrode pattern in a conductive polymeric layer comprising the steps of: (a) contacting a charge pattern with an electrographic developer composition comprising a carrier and marking particles having a polarity opposite that of said charge pattern thereby producing a developed image pattern, wherein said marking particles contain a conductivity modifier or a precursor thereof; (b) applying the developed image pattern to a conductive layer containing a conductive polymer on a substrate and (c) transferring said image pattern onto a said conductive layer. An element formed by the method is also disclosed.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: April 25, 2006
    Assignee: Eastman Kodak
    Inventors: Mark Lelental, Mitchell S. Burberry, Charles C. Anderson
  • Patent number: 6923923
    Abstract: Disclosed are a metallic nanoparticle cluster ink and a method for forming a conductive metal pattern using the cluster ink. The metallic nanoparticle cluster ink comprises colloidal metallic nanoparticles and a bifunctional compound. The conductive metal pattern is formed by forming a metallic nanoparticle pattern on a substrate using a mold made from PDMS (poly(dimethylsiloxane) polymer as a stamp, and heat-treating the substrate. Micrometer-sized conductive metal patterns can be easily formed on various substrates in a simple and inexpensive manner without the use of costly systems, thereby being very useful in various industrial fields.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: August 2, 2005
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Jin Woo Cheon, Sung Nam Cho, Jong Il Park, Kyung Bok Lee, Seok Chang, Soon Taik Hwang
  • Publication number: 20030027057
    Abstract: An alternating phase shift mask (400) and method of manufacturing thereof including assist edges (450) and (452) surrounding a main phase edge (420). Assist edges (450) and (452) improve the resolution of the alternating phase shift mask (400), thus enabling the patterning of smaller size features on a semiconductor wafer.
    Type: Application
    Filed: August 6, 2001
    Publication date: February 6, 2003
    Inventors: Uwe Paul Schroeder, Tobias Mono, Veit Klee
  • Patent number: 6207331
    Abstract: The image recording process comprises the steps of preparing an aqueous coloring material liquid by dissolving or dispersing fine particles of a coloring material in an aqueous liquid, disposing an image supporting member and a counter electrode opposite thereto in the aqueous coloring material liquid, applying an electric current or an electric field corresponding to an image pattern between the image supporting member and the counter electrode, electrochemically depositing an image forming material containing the fine particles of the coloring material on the surface of the image supporting member thereby forming an image, and transferring the image forming material, in a condition where the image forming material contains 20 to 60% by weight of the aqueous liquid, onto a recording medium so as to record the image on the recording medium.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: March 27, 2001
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Eiichi Akutsu, Shigemi Ohtsu, Lyong Sun Pu
  • Patent number: 6165698
    Abstract: A method for forming an image having a protective layer is disclosed. The method comprises the steps offorming an image comprising a support having thereon an image comprising a layer comprising a binder and a colorant having a thickness of t.sub.1,providing a protective layer on the surface of the image by transferring a thermally transferable layer from a transferring foil comprising a support having thereon the thermally transferable layer having a thickness of t.sub.2 which is formed by coating and drying a coating liquid, which comprises a thermoplastic resin emulsion dispersed in a dispersing medium, on the support,wherein the t.sub.1 and t.sub.2 satisfy a relation of t.sub.2 >2.times.t.sub.1.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: December 26, 2000
    Assignee: Konica Corporation
    Inventors: Tomonori Kawamura, Kiyoshi Hagiwara, Yasunobu Kobayashi
  • Patent number: 5876847
    Abstract: A coated substrate having a material substrate, and a coating composition fixed to a surface of the material substrate as a surface layer, the surface layer containing a hydrophilic resin which swells water but is not washed off by water, and which is solid in air at ambient temperatures that are encountered when said coated substrate is functioning as a reusable printing sheet and from which surface layer prior printing deposits can be readily removed, and when which the coated substrate has a surface resistivity of to 10.sup.5 to 10.sup.13 .OMEGA./.quadrature. at 25.degree. C., 50% RH after being dipped in water for 5 minutes and dried with a hot air of 60.degree. to 90.degree. C. for 5 minutes.
    Type: Grant
    Filed: August 1, 1995
    Date of Patent: March 2, 1999
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Hiroyuki Mitsuhashi, Kenji Kohno, Kazushi Miyata
  • Patent number: 5872883
    Abstract: The present invention provides a curved optical waveguide with reduced loss. Particularly, it relates to a waveguide with rectangular cross-section which has a curved portion, wherein the relation between the width D of the waveguide at the curved portion and the radius R of the curvature is R/D.ltoreq.500. This waveguide is provided with at least one cladding inside the core of said curved portion, thereby dividing the waveguide at the curved portion in a plurality of narrow optical waveguides. This enables a large reduction of the loss even in curved optical waveguides with sharp curves, and realizes inexpensive optical waveguides.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: February 16, 1999
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Michio Ohba, Yasunari Kawabata, Kuniaki Jinnai
  • Patent number: 5872076
    Abstract: The present invention relates to a method and apparatus for reusing an image recording material wherein a releasing property is imparted to at least substrate surface of an image recording material on which an image has been formed of an image forming material containing a heat fusible ingredient, a heat fusible material is added or attached onto the image recording material, a stripping member is contacted under pressure with the heat fusible material while heating the heat fusible material together with the image recording materials to fuse, and the image recording material is peeled off from the stripping member to transfer the image forming material together with the heat fusible material to the stripping member, thereby reusing the image recording material. The materials for imparting a releasing property to the substrate surface include silicone compounds such as silane compounds, preferably those silane compounds containing fine particles such as silicone resins.
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: February 16, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tomoo Kobayashi, Kaoru Torikoshi, Tadakazu Edure
  • Patent number: 5769935
    Abstract: A method and composition for fusing toner to paper using hydrofluorocarbons or perfluorinated C.sub.1 -C.sub.4 alkyl alkyl ethers as a toner fusing agent in a cold fusion process. The composition utilizes a uniform mixture of at least one chlorine-free hydrofluorocarbon or perfluorinated C.sub.1 -C.sub.4 alkyl alkyl ether or mixture thereof, and preferably at least one toner stabilizer and/or an optional solvent. When used, the chlorine-free composition achieves satisfactory fusing and is more environmentally advantageous than chlorine containing toner fusing agents. The composition has a zero ozone depletion potential and a low global warming potential.
    Type: Grant
    Filed: November 26, 1996
    Date of Patent: June 23, 1998
    Assignee: AlliedSignal Inc.
    Inventor: Ellen Louise Swan
  • Patent number: 5744269
    Abstract: A method of protecting an electrostatic image on a substrate, wherein, an electrostatic image is formed on the substrate, and protected by applying an amphipathic liquid toner on the electrostatic image by electrostatic means, and fixing the amphipathic liquid toner to form a protective layer. The amphipathic liquid toner includes a carrier fluid, an amphipathic, non-gel copolymer, and a charge control agent to provide an electrostatic charge. The carrier fluid is typically an electrically resistive hydrocarbon solvent, having an electrical resistivity of at least about 10.sup.9 ohm.cndot.cm, a dielectric constant of less than about 3, and a boiling point from about 68.degree. C. to about 250.degree. C. The amphipathic, non-gel copolymer, which is insoluble as a whole in the carrier fluid, has at least one polymer segment that is soluble in the carrier fluid and at least one polymer segment that is insoluble in the carrier fluid.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: April 28, 1998
    Assignee: Specialty Toner Corporation
    Inventors: Romit Bhattacharya, Giovanni Perrotta, Achyut Bhalchandra Deshpande, Paul Rocco Bilancio
  • Patent number: 5679462
    Abstract: A fixing apparatus for fixing image on a recording sheet or film comprises a fixing roller having a surface comprising a fluororesin and contacting with a toner, a heating means for heating said fixing roller, a rotating pressing roller urged against said fixing roller, and means for applying a releasing agent to the surface of said fixing roller, characterized in that said releasing agent comprises a fluorosilicone represented by the following formula (I): ##STR1## wherein a, b, c, d, e and f independently denote an integer of 0 to 3, l and m are an integer of 0 to 3 with a proviso that 1.ltoreq.1+m.ltoreq.6, and n is an integer of 1 or more.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: October 21, 1997
    Assignee: Ricoh Company, Ltd.
    Inventors: Setsuo Soga, Toshiya Yabei, Jun Okamoto, Yasuhiro Kohira
  • Patent number: 5487801
    Abstract: The present invention relates to a pre-proof temperature controlling assembly associated with an off-press apparatus for laminating an image sheet to an image receiving substrate and, more particularly, for laminating a plurality of image sheets to the receiving substrate and then laminating a portion of the receiving substrate to a display sheet.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: January 30, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Michael P. Marion, David C. Otto
  • Patent number: 5390013
    Abstract: An ultrasonic fuser for fixing toner images to substrates utilizes an acoustic transducer or resonator in the form of an ultrasonic welding horn and a viscoelastic member. As toner images carried on a substrate are moved between the resonator and the viscoelastic member heat energy is created both in the toner particles forming the images and the viscoelastic member. The heat energy created in the viscoelastic member is transferred to the toner images through intimate contact therewith and together with the heat generated in the toner serves to elevate the toner to its fusing temperature.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: February 14, 1995
    Assignee: Xerox Corporation
    Inventor: Christopher Snelling
  • Patent number: 5339147
    Abstract: Ultrasonic fusing is performed sequentially by generating heat in an external fusing member (i.e. fuser roll surface) by ultrasonic absorption and then contacting unfused toner images with the heated member as they pass through a fusing nip comprising the heated member and a pressure roll. The externally heated roll member is fabricated from a material having a high loss tangent (tan delta) and is therefore capable of dissipating a large percentage of heat energy generated therein. Loss tangent is defined as the ratio of a material's viscous modulus to its elastic modulus. Heat generation in the viscoelastic member is created through acoustic distortions in viscoelastic member. Thus, the acoustic waves absorbed by the viscoelastic material forming the outer layer of the fuser roll are converted to heat energy. The heat generated in the roll member is transferred to the toner through intimate contact therewith.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: August 16, 1994
    Assignee: Xerox Corporation
    Inventors: Christopher Snelling, Dale R. Mashtare
  • Patent number: 5322751
    Abstract: A metallic toner fluid composition that contains (A) electrostatically charged, colloidal elemental metal particles dispersed in an electrically nonconductive organic carrier liquid having a dielectric constant less than about 3.5 and a volume resistivity greater than about 10.sup.12 ohm-cm, (B) a soluble surfactant in an amount sufficient to charge and stabilize the colloidal metal dispersion, and (C) an effective amount of organosol particles and/or a soluble polymer that is not a soluble surfactant (B). Also disclosed at a substrate coated with elemental metallic toner fluid particles. The coated substrate can act as a donor substrate for thermal mass transfer of images to a secondary receiving substrate by performing either or both of the following steps, in any order:a) transferring the elemental metal coating from the primary substrate to the secondary receiving substrate;b) contacting the elemental metal coated primary or secondary substrate with an electroless metal plating solution.
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: June 21, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Hsin H. Chou, Wu-Shyong Li, Robin E. Wright
  • Patent number: 5253021
    Abstract: Small particle toner images carried on an image member are transferred to thermally conductive intermediate by heating the intermediate in the presence of an electrical field urging transfer. The intermediate is heated to a temperature sufficient to sinter the toner particles at least when they touch the intermediate and other toner particles, but insufficient to damage the image member or cause the toner to stick to the image member. The toner image is transferred from the intermediate to a receiving sheet, which step can include sufficient heat and pressure to fix the image to the receiving sheet.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: October 12, 1993
    Assignee: Eastman Kodak Company
    Inventors: Muhammad Aslam, Lawrence P. DeMejo, Alec N. Mutz, John M. McCabe
  • Patent number: 5200284
    Abstract: Toner fusing members coated with melamine-cured polyester-amide compositions are obtained wherein the polyester-amide component is a copolymer of one or more organic dicarboxylic acids with 2,2-bis(4-hydroxyphenyl)hexafluoropropane and an aminoalkyl-terminated organopolysiloxane.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: April 6, 1993
    Assignee: Eastman Kodak Company
    Inventors: Jiann H. Chen, Tsang J. Chen, Lawrence P. DeMejo
  • Patent number: 5189478
    Abstract: An image forming apparatus wherein toner images formed on a photosensitive member are transferred to a transfer medium and overlaid thereon, and the toner images on the transfer medium are transferred onto a copy sheet. The apparatus has a charger for reducing charge on the toner images transferred to the transfer medium, and output of the charger is controlled in accordance with the number of toner images on the transfer medium. Alternatively, the image forming apparatus has a first charger for reducing charge on the toner images transferred to the transfer medium and a second charger for recharging the toner images processed by the first charger.
    Type: Grant
    Filed: September 25, 1991
    Date of Patent: February 23, 1993
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Yoshinobu Hara, Shizuo Yuge, Kazuyoshi Hara
  • Patent number: 5171652
    Abstract: In forming an image by the simultaneous light exposure-transfer process using a photosensitive toner, a light-exposed electricity-removed toner is effectively scraped without bad influences on the image density, and the fog density is drastically reduced.In subjecting a photosensitive toner layer to imagewise light exposure to form a combination of an electricity-removed toner and a charged toner and removing the electricity-removed toner from an electroconductive substrate by contact with a magnetic brush, the flux density distribution of a main developing pole in a developing sleeve is set so that a two-peak flux density distribution having two peaks separated on the upstream side and downstream side with the vicinity of the nip position between the developing sleeve and electroconductive substrate being as the center is produced in the tangential direction and the value of the peak on the downstream side is smaller than the value of the peak on the upstream side.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: December 15, 1992
    Assignee: Mita Industrial Co., Ltd.
    Inventor: Yosinobu Umetani
  • Patent number: 5119140
    Abstract: Method and apparatus wherein very efficient transfer of low toner masses from an intermediate image receiving member without degradation of high toner mass transfer is effected by using a DC pretransfer corotron treatment of the toner on the intermediate followed by biased roll transfer to plain paper.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: June 2, 1992
    Assignee: Xerox Corporation
    Inventors: John S. Berkes, Frank J. Bonsignore
  • Patent number: 4997697
    Abstract: A transparent substrate material for receiving or containing an image and comprised of a supporting substrate base, an antistatic polymer layer coated on one or both sides of the substrate and comprised of hydrophilic cellulosic components, and a toner receiving polymer layer contained on one or both sides of the antistatic layer, which polymer is comprised of hydrophobic cellulose ethers, hydrophobic cellulose esters, or mixtures thereof, and wherein the toner receiving layer contains adhesive components.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: March 5, 1991
    Assignee: Xerox Corporation
    Inventor: Shadi L. Malhotra
  • Patent number: 4935785
    Abstract: Disclosed is a process for fusing an electrophotographic image to a substrate which comprises developing an electrostatic latent image with a toner of one polarity and contacting the developed image with a fuser roll having on the surface thereof an insulating material charged to the same polarity as the toner. In one embodiment of the invention, the surface of the fuser roll comprises an insulating material and the charge is applied with a charging means such as a corotron. In another embodiment of the invention, the surface of the fuser roll comprises a polymeric electret material having embedded therein stable electrical charges of the same polarity as that of the toner. For this second embodiment, the fuser roll may optionally be charged with a charging means.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: June 19, 1990
    Assignee: Xerox Corporation
    Inventors: Eva A. Wildi, Ian D. Morrison
  • Patent number: 4793255
    Abstract: Apparatus and a method of using that apparatus to electrostatically pickup and retain a master onto a dielectric substrate is provided. The dielectric substrate can be a flexible web with a conductive coating applied to one surface on which the master is retained. The master has an exposed permanent latent image therein.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: December 27, 1988
    Assignee: Olin Hunt Specialty Products, Inc.
    Inventors: David P. Bujese, Robert H. Detig
  • Patent number: 4687971
    Abstract: A power supply circuit comprises a single discharge capacitor having a charging sufficient to trigger discharge in a discharge lamp. The discharge capacitor is associated with means for accumulating energy, with which it is charged. The energy accumulating means receives commercially available alternating current and applies the accumulated energy to the discharge capacitor to charge the latter. The power supply circuit may include an auxiliary capacitor which has a smaller capacitance and higher potential rating than the discharge capacitor. The auxiliary capacitor may have a potential rating sufficient to activate the discharge lamp alone. The discharge capacitor cooperates with the auxiliary capacitor to define discharge period. Preferably, the power supply circuit may include means for blocking or shutting off power supply at a given timing to precisely control the discharge period.
    Type: Grant
    Filed: November 4, 1985
    Date of Patent: August 18, 1987
    Assignee: Fuji Xerox Company, Limited
    Inventor: Norimitsu Shimizu
  • Patent number: 4666801
    Abstract: An electrophotographic printing apparatus employs a laminated, photosensitive medium including transparent supporting and conducting layers and a photosensitive layer defining the top surface of the medium, on which a toner image is formed. A first developer, maintained at a voltage of the same polarity as the toner particles, forms a uniform layer of charged toner particles on the surface of the photoconductive layer, the charged particles adhering to the surface. Simultaneously or subsequently, an optical beam is projected onto the photoconductive layer in accordance with the image to be printed, rendering the selectively exposed portions sufficiently conductive to permit charges of opposite polarity to be injected into the photoconductive layer from the conducting layer; the photoconductive layer establishes trapping potential levels therein, permitting the charges to traverse the layer to positions adjacent the top surface thereof.
    Type: Grant
    Filed: August 5, 1985
    Date of Patent: May 19, 1987
    Assignee: Fujitsu Limited
    Inventors: Masatoshi Kimura, Junzo Nakajima
  • Patent number: 4610939
    Abstract: Method and apparatus for transferring an electrostatically deposited electrophoretic toner image including the step of transferring image-wise deposited toner particles dispersed in a stratum of carrier liquid having a volume resistivity of at least 10.sup.9 ohm.cm and a dielectric constant less than 3 from an electrically insulating surface onto a receptor element by contacting said liquid stratum while carried on the insulating surface with a surface of the receptor element while applying an electric field such that the receptor element has a polarity opposite to the polarity of the toner particles to effect such transfer, characterized in that before the image-wise liquid stratum touches the receptor element the carrier liquid stratum is given a corona-charge treatment by a corona-charge unit whereby said liquid stratum is charged to a polarity opposite to the charge of the toner particles.
    Type: Grant
    Filed: January 9, 1985
    Date of Patent: September 9, 1986
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Jozef L. Mampaey, Herman J. Remmerie
  • Patent number: 4499166
    Abstract: A developer mixture used in an electrophotographic printing machine to develop an electrostatic latent image recorded on the photoconductive member includes weakly magnetically attractable toner particles and strongly magnetically attractable carrier granules adhering triboelectrically to one another. The toner particles and carrier granules are substantially the same size. During development, the toner particles are deposited on the latent image forming a toner powder image. Subsequently, the toner powder image is transferred to a copy sheet and permanently fixed thereto.
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: February 12, 1985
    Assignee: Rank Xerox, Ltd.
    Inventor: Yoshikazu Okamoto
  • Patent number: 4495264
    Abstract: An electrophotographic photosensitive member and use thereof, having a photosensitive layer upon or over an electrically conductive substrate, the photosensitive layer comprising an organic photoconductive material selected from the group consisting of the following general formula (1), (2), or (3): ##STR1## wherein A represents a coupler component having aromaticity, ##STR2## wherein, A represents a coupler component having aromaticity, R represents hydrogen, halogen, alkyl, or alkoxy, and n represents an integer of 1 to 4, ##STR3## wherein, A represents a coupler component having aromaticity and R.sub.1 represents a single bond or a substituted or unsubstituted divalent hydrocarbon or heterocyclic residue.
    Type: Grant
    Filed: March 14, 1984
    Date of Patent: January 22, 1985
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideyuki Takahashi, Shozo Ishikawa
  • Patent number: 4471694
    Abstract: A printing process comprise formation of fixed toner images on a photoconductive substrate by using an electrophotographic method, selective application of color materials onto the image portions of the fixed toner images, and printing of said color material applied onto the fixed toner image to a transfer sheet characterized by removing said fixed toner images from the used photoconductive substrate, forming other toner images on the photoconductive substrate thus reclaimed by using an electrophotographic method, application of color materials onto said other toner images, and printing of said color material applied onto the other fixed toner image to a transfer sheet.
    Type: Grant
    Filed: August 10, 1983
    Date of Patent: September 18, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshio Takasu, Tadaji Fukuda, Junichiro Kanbe
  • Patent number: 4412050
    Abstract: The present invention relates to vinyl biphenyl compounds of the formula ##STR1## wherein one of R.sup.1 and R.sup.2 is vinyl and the other is hydrogen, and the cyclic moiety A is a -2,5-, -2,3-, or -3,4- di-OR-1-phenyl moiety wherein R is a hydroxy-protecting group, polymers prepared therefrom, and methods of preparation thereof. The subject vinyl biphenyls can be polymerized and the resultant polymers deblocked to remove the R groups and provide the corresponding polymeric dihydroxybiphenyls which can be employed as redox polymers.
    Type: Grant
    Filed: January 5, 1981
    Date of Patent: October 25, 1983
    Assignee: Polaroid Corporation
    Inventor: Avinash C. Mehta
  • Patent number: 4396273
    Abstract: A transfer unit includes a pair of guide and field stabilizer members disposed adjacent to a transfer member and along a conveying path for a transfer sheet. A voltage is applied to the stabilizer members which is of the same polarity as a bias voltage applied to the transfer member. It is assured that transfer sheet reliably contacts the pair of field stabilizer members as it passes therebetween.
    Type: Grant
    Filed: July 22, 1981
    Date of Patent: August 2, 1983
    Assignee: Olympus Optical Company Ltd.
    Inventors: Takashi Matsuyama, Tadahiro Yasuda
  • Patent number: 4363550
    Abstract: In a transfer-type electronic copying machine including a photosensitive drum, charging device, exposure device, developing device, transfer device, and separating device, the separating device of this invention has a separating section for separating a recording sheet bearing a toner image thereon from the surface of the photosensitive drum. The recording sheet is guided by a guide roller facing the photosensitive drum and having a slit formed therein, and is brought in contact with a conductive brush through the slit to be de-electrified.
    Type: Grant
    Filed: December 4, 1980
    Date of Patent: December 14, 1982
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Kenshi Toshimitsu, Akihiro Kanazashi, Mitsuaki Kohyama
  • Patent number: 4263359
    Abstract: A charge receptor film element for charge transfer imaging comprising, in order,(a) support, e.g., transparent film,(b) conductive layer, e.g., metal, metal oxide, ammonium chloride salt,(c) thin dielectric layer bearing, e.g., transparent polyethylene terephthalate,(d) opaque dots, e.g., 3 to 50 micrometers in height, covering less than 10% of the total area of layer (c) which provide less than 0.05 background optical density. The element is useful for medical radiography, in eletrophotography, electrostatic printing, etc.
    Type: Grant
    Filed: April 5, 1979
    Date of Patent: April 21, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Earle L. Kitts, Jr.
  • Patent number: 4233381
    Abstract: My invention comprises charging a photoconductive surface in the dark and exposing it to a light and shade image of the original to produce a latent electrostatic image. The latent electrostatic image is then developed by any method known to the art employing a liquid developing fluid, and the apparent resolution or sharpness of the developed image is increased by exposing the developed image, while on the photoconductor, to the action of blanket light. The sharpened image may then be transferred to a carrier sheet by any method known to the art.The apparatus of my invention comprises a conventional electrophotographic reproduction apparatus in which a means is provided for subjecting a liquid-developed image, while on the photoconductor, to the action of blanket light. This means is positioned to act before the liquid-developed image is transferred to a carrier sheet after it has been developed, if a transfer is to take place.
    Type: Grant
    Filed: November 9, 1978
    Date of Patent: November 11, 1980
    Assignee: Savin Corporation
    Inventor: Benzion Landa
  • Patent number: 4202619
    Abstract: Apparatus for imaging electrophotographic film which has a short focal length optical gate for focusing a monochromatic light pattern onto the photoconductive layer of electrostatically charged film. The gate transmits and focuses the imaging light onto the film which is advanced over the surface of the optical gate while being lubricated by an optical liquid having an index of refraction closely matching that of the optical gate. The optical gate and liquid transmit and focus the images on the film at their point of contact. The optical gate may be a cylindrical rod which also may serve in part to define a reservoir for an electrophoretic liquid or toner which blends with the optical liquid adjacent the focal point of the optical gate.
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: May 13, 1980
    Inventor: John D. Plumadore