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    INK JET PRINTING PROCESS
    1.
    发明专利
    INK JET PRINTING PROCESS 未知

    公开(公告)号：CA2279695C

    公开(公告)日：2004-09-21

    申请号：CA2279695

    申请日：1999-08-05

    Applicant: XEROX CORP

    Inventor： SMITH THOMAS W ,  LIMBURG WILLIAM W ,  LUCA DAVID J ,  MCGRANE KATHLEEN M

    IPC: B41J2/01 ,  B41J2/14 ,  B41J2/155 ,  B41J2/175 ,  B41J2/21 ,  B41M5/00 ,  C09D11/00

    Abstract: A process comprising (a) incorporating into an ink jet printing apparatus (1) a developing composition comprising a liquid vehicle and a color developer; (2) an oxidizing composition comprising a liquid vehicle and an oxidizing agent; (3) a coloring composition comprising a liquid vehicle and a dye coupler; and (4) a fixing composition comprising a liquid vehicle and a fixative; (b) causing droplets of the developing composition to be ejected in an imagewise pattern onto the substrate; (c) causing droplets of the oxidizing composition to be ejected in an imagewise pattern onto the substrate; (d) causing droplets of the coloring composition to be ejected in an imagewise pattern onto the substrate; and (e) causing droplets of the fixing composition to be ejected in an imagewise pattern onto the substrate; wherein the process results in at least some portions of the substrate bearing images comprising all four of the developing composition, the oxidizing composition, the coloring composition, and the fixing composition, said portions forming a printed image. Specific embodiments of the present invention are directed to the realization of continuous tone and gray scale in images by (1) control of the time at which color forming reactions are quenched by controlling the time period between deposition of the color forming liquids and deposition of the fixing liquid; (2) control of the extent of color forming reactions b y limitation of the quantity of one of the color forming liquids; or (3) control of pixel size by drop placement control over the overlap areas of drops of color forming liquids.

    INK JET PRINTING PROCESS
    3.
    发明专利
    INK JET PRINTING PROCESS 未知

    公开(公告)号：CA2472726A1

    公开(公告)日：2000-03-11

    申请号：CA2472726

    申请日：1999-08-05

    Applicant: XEROX CORP

    Inventor： MCGRANE KATHLEEN M ,  SMITH THOMAS W ,  LUCA DAVID J ,  LIMBURG WILLIAM W

    IPC: B41J2/04 ,  B41J2/21 ,  C09D11/02

    Abstract: A process which comprises: a) incorporating into an ink jet printing apparatus: a color forming composition comprising a liquid vehicle and at least one color forming agent, and a reacting composition comprising a liquid vehicle and at least one material capable of reacting with the color forming agent to cause a desired color to form; b) causing droplets of the color forming composition to be ejected in an imagewise pattern onto the substrate; and c) causing droplets of the reacting composition to be ejected in an imagewise pattern onto the substrate; wherein the process results in at least some portions of the substrate bearing images comprising both the color forming composition and the reacting composition, said portions forming a printed image, wherein at time T1, the color forming composition has formed an image on the substrate, at time T2, the reacting composition is deposited onto a first portion P1 of the image, and at time T3, the reacting composition is deposited onto a second portion P2 of the image, wherein time period T1 to T2 is less than time period T1 to T3, thereby resulting in second portion P2 having a different color intensity from first portion P1.

    PREPARATION OF CHALCOGENIDE ALLOYS BY ELECTROCHEMICAL COREDUCTION OF ESTERS
    6.
    发明专利
    PREPARATION OF CHALCOGENIDE ALLOYS BY ELECTROCHEMICAL COREDUCTION OF ESTERS 未知

    公开(公告)号：DE3470181D1

    公开(公告)日：1988-05-05

    申请号：DE3470181

    申请日：1984-01-20

    Applicant: XEROX CORP

    Inventor： BADESHA SANTOKH S ,  SMITH THOMAS W ,  LOUTFY RAFIK O

    IPC: C25B1/00 ,  C25C1/24

    Abstract: A process for preparing chalcogenide alloys of high purity which comprises providing the corresponding pure esters of the elements desired in an organic medium and an organic salt, follow by simultaneously coreducing the esters by an electrochemical reduction in an electrolytic apparatus. More specifically, in one embodiment, selenium arsenic alloys of high purity are prepared by subjecting the corresponding pure esters to a simultaneous electrochemical reduction reaction in an electrochemical apparatus containing an anode, a cathode, an electrolytic solution comprising the pure esters of selenium and arsenic, contained in a solution of an organic solvent and an organic salt, wherein the pure esters lose electrons resulting in the desired metallic alloys.

    PHASE CHANGE INK COMPOSITIONS
    8.
    发明专利
    PHASE CHANGE INK COMPOSITIONS 未知

    公开(公告)号：CA2400930C

    公开(公告)日：2010-04-27

    申请号：CA2400930

    申请日：2002-08-30

    Applicant: XEROX CORP

    Inventor： GOODBRAND H BRUCE ,  SMITH THOMAS W ,  FOUCHER DANIEL ,  MCGRANE KATHLEEN M ,  POPOVIC DINA

    IPC: C09D11/00 ,  C09D139/04

    Abstract: Disclosed is a phase change ink composition comprising a colorant and an ink vehicle, the ink being a solid at temperatures less than about 50°C and exhibiting a viscosity of no more than about 20 centipoise at a jetting temperature of no more than about 160°C, wherein at a first temperature hydrogen bonds of sufficient strength exist between the ink vehicle molecules so that the ink vehicle forms hydrogen-bonded dimers, oligomers, or polymers, and wherein at a second temperature which is higher than the first temperature the hydrogen bonds between the ink vehicle molecules are sufficiently broken that fewer hydrogen-bonded dimers, oligomers, or polymers are present in the ink at the second temperature than are present in the ink at the first temperature, so that the viscosity of the ink at the second temperature is lower than the viscosity of the ink at the first temperature.

    INK JET PRINTING PROCESS
    10.
    发明专利
    INK JET PRINTING PROCESS 未知

    公开(公告)号：CA2472355C

    公开(公告)日：2008-01-08

    申请号：CA2472355

    申请日：1999-08-05

    Applicant: XEROX CORP

    Inventor： SMITH THOMAS W ,  LUCA DAVID J ,  LIMBURG WILLIAM W ,  MCGRANE KATHLEEN M

    IPC: B41J2/21 ,  B41J2/04 ,  C09D11/02

    Abstract: A process which comprises: a) incorporating into an ink jet printing apparatus: a color forming composition comprising a liquid vehicle and at least one color forming agent, and a reacting composition comprising a liquid vehicle and at least one material capable of reacting with the color forming agent to cause a desired color to form; b) causing droplets of the color forming composition to be ejected in an imagewise pattern onto the substrate; and c) causing droplets of the reacting composition to be ejected in an imagewise pattern onto the substrate; wherein the process results in at least some portions of the substrate bearing images comprising both the color forming composition and the reacting composition, said portions forming a printed image, wherein one of i) the color forming composition and ii) the reacting composition is applied to the substrate in fixed volumes per pixel, and the other of i) and ii) is applied to the substrate in varying volume per pixel, thereby varying the intensity of color of the printed image.

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