-
81.
公开(公告)号:CA2770959A1
公开(公告)日:2012-09-17
申请号:CA2770959
申请日:2012-03-09
Applicant: XEROX CORP
Inventor: IFTIME GABRIEL , ODELL PETER G , ALLEN C GEOFFREY , VEREGIN RICHARD P N , BRETON MARCEL P
Abstract: A magnetic ink including an organic solvent; an optional dispersant; an optional synergist; an optional antioxidant; an optional viscosity controlling agent; an optional colorant; an optional binder; and a carbon coated magnetic nanoparticle comprising a magnetic core and a carbon shell disposed thereover.
-
公开(公告)号:CA2678386C
公开(公告)日:2012-07-17
申请号:CA2678386
申请日:2009-09-11
Applicant: XEROX CORP
Inventor: KAZMAIER PETER M , IFTIME GABRIEL , VANBESIEN DARYL W , ZWARTZ EDWARD G , WANG SHEN-GE , ESCHBACH REINER
Abstract: A toner set includes a plurality of toners, at least one toner but less than all toners of the toner set including binder, colorant and fluorescence agent and remaining additional toners including binder, colorant and free of fluorescence agent. At least a first toner grouping and a second toner grouping of the toner set form a combination, the first and second groupings of the combination exhibiting a substantially same color under ambient light conditions upon image formation. The first toner grouping and the second toner grouping of the combination contain a different amount of the fluorescence agent, wherein upon exposure to activating energy, the fluorescence agent fluoresces to cause a visible change in the color of a pattern formed in an image by the first toner grouping as compared to the second toner grouping.
-
公开(公告)号:CA2680954A1
公开(公告)日:2010-04-06
申请号:CA2680954
申请日:2009-09-29
Applicant: XEROX CORP
Inventor: IFTIME GABRIEL , VANBESIEN DARYL W , BIRAU MARIA , WOSNICK JORDAN , KAZMAIER PETER M
IPC: G03G9/08
Abstract: A method for making toners to include at least one nanoscale fluorescent pigment particle composition and/or a fluorescent organic nanoparticle composition. The particles are incorporated into emulsion of toner and used in making toner via emulsion aggregation. Such toners may have a core and/or a shell and the clay composites may be included within the core, the shell or both. The fluorescent organic nanoparticle composition includes a polymeric matrix obtained by modified EA latex process and/or emulsion polymerization and one or more fluorescent dyes and the nanoscale fluorescent pigment particle composition includes pigment molecules with at least one functional moiety, and a sterically bulky stabilizer compound including at least one functional group, the functional moiety of the pigment associates non-covalently with the functional group of the stabilizer, and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale-sized pigment particles.
-
公开(公告)号:CA2678341A1
公开(公告)日:2010-03-19
申请号:CA2678341
申请日:2009-09-11
Applicant: XEROX CORP
Inventor: KAZMAIER PETER M , IFTIME GABRIEL , WAGNER CHRISTOPHER A , WANG SHEN-GE , ESCHBACH REINER
Abstract: An ink set includes a plurality of inks, at least one ink but less than all inks of the ink set including an ink vehicle, colorant and fluorescence agent and remaining additional inks including an ink vehicle, colorant and free of fluorescence agent. At least a first ink grouping and a second ink grouping of the ink set form a combination, the first and second groupings of the combination exhibiting a substantially same color under ambient light conditions upon image formation. The first ink grouping and the second ink grouping of the combination contain a different amount of the fluorescence agent, wherein upon exposure to activating energy, the fluorescence agent fluoresces to cause a visible change in the color of a pattern formed in an image by the first ink grouping as compared to the second ink grouping.
-
公开(公告)号:CA2634399A1
公开(公告)日:2008-12-13
申请号:CA2634399
申请日:2008-06-06
Applicant: XEROX CORP
Inventor: CHOPRA NAVEEN , KEOSHKERIAN BARKEV , KAZMAIER PETER M , IFTIME GABRIEL , NORSTEN TYLER
Abstract: An image forming medium includes a substrate, and an imaging layer coated on or impregnated into said substrate, wherein the imaging layer includes an imagi ng composition including a photochromic or photochromic-thermochromic material dissolved or dispersed in a solvent or polymeric binder, wherein the imaging composition is imageable by light of a first wavelength and erasable in a short time period by a combination of heat and light of a second wavelength such that simultaneous erase with heat and light of the second wavelength is faster than erase by heat alone a nd exhibits a reversible transition between a colorless and a colored state.
-
公开(公告)号:CA2588499A1
公开(公告)日:2007-11-19
申请号:CA2588499
申请日:2007-05-14
Applicant: XEROX CORP
Inventor: KRUSOR BRENT S , KAZMAIER PETER M , YANG SAN-MING , IFTIME GABRIEL , CHOPRA NAVEEN , DANIEL JURGEN H
Abstract: An electrophoretic display device includes a multiplicity of individual reservoirs containing a display medium between conductive substrates, at lea st one of which is transparent, wherein the display medium includes one or more set of colored particles in a dielectric fluid and has an electrical conductivity of about 10 -11 to about -15 S/m, and wherein the multiplicity of individual reservoirs are defined b y a unitary grid whose walls segregate the reservoirs. The gird may be formed vi a photolithography or from a master stamp derived from a mold of the grid pattern.
-
公开(公告)号:CA2540911A1
公开(公告)日:2006-09-30
申请号:CA2540911
申请日:2006-03-23
Applicant: XEROX CORP
Inventor: IFTIME GABRIEL , KAZMAIER PETER M
Abstract: A reimagable medium may include one or more photochromic layers, a liqu id crystal layer adjacent to at least one photochromic layer, and an electric field generating apparatus connected to supply a voltage across the liquid crystal layer.
-
公开(公告)号:CA2527997A1
公开(公告)日:2006-06-03
申请号:CA2527997
申请日:2005-11-25
Applicant: XEROX CORP
Inventor: IFTIME GABRIEL , KAZMAIER PETER M
Abstract: A cholesteric display including a liquid crystalline mixture having a dipol ar dopant dissolved in the liquid crystalline mixture and the resulting mixture is reflecting light in the visible range of the spectrum when in planar state. In accordance with another aspect, a process includes forming a composition wit h a dipolar molecule to result in a liquid crystal dipolar dopant, and liquid crystal is added to the composition. In accordance with still another aspect, a device includes a liquid crystal composition includes a cholesteric liquid and a dipolar dopant. The liquid crystal composition is switchable between a focal-conic state and a planar state in the presence of an electric field and is stable in the respective state when the electric field is removed.
-
公开(公告)号:CA2504995A1
公开(公告)日:2005-10-29
申请号:CA2504995
申请日:2005-04-22
Applicant: XEROX CORP
Inventor: KAZMAIER PETER M , IFTIME GABRIEL
Abstract: An image forming method composed of: (a) providing a reimageable medium composed of a substrate and a photochromic material, wherein the medium is capable of exhibiting a color contrast and an absence of the color contrast; (b) exposing the medium to an imaging light corresponding to a predetermined image to result in an exposed region and a non-exposed region, wherein the color contrast is present between the exposed region and the non-exposed region to allow a temporary image corresponding to the predetermined image to be visible for a visible time; (c) subjecting the temporary image to an indoor ambient condition for an image erasing time to change the color contrast to the absence of the color contrast to erase the temporary image without using an image erasure device; and (d) optionally repeating procedures (b) and (c) a number of times to result in the medium undergoing a number of additional cycles of temporary image formation and temporary image erasure.
-
公开(公告)号:CA2838598C
公开(公告)日:2017-11-21
申请号:CA2838598
申请日:2014-01-07
Applicant: XEROX CORP
Inventor: IFTIME GABRIEL , VANBESIEN DARYL W , DRAPPEL STEPHAN V , BELELIE JENNIFER L , CHOPRA NAVEEN , GOREDEMA ADELA
Abstract: A phase change ink composition comprising an amorphous component, a crystalline material, a photochromic material and optionally, a colorant, which are suitable for ink jet printing, including printing on coated paper substrates. The novel phase change ink formulation allows the ink to change color when exposed to UV light, reversibly and multiple times, providing an ink suitable for use in security applications.
-
-
-
-
-
-
-
-
-