Patents by Inventor David J. Sander
David J. Sander has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7662272Abstract: Embodiments include a distilled wax having a crystallinity of from about 55 to about 100 percent, wherein the degree of crystallinity is calculated using the following formulas: [Heat of enthalpy (Hm) J/g/294 J/g]×100=degree of crystallinity (Xc); [Heat of recrystallization (Hrc) J/g/294 J/g]×100=degree of crystallinity (Xc); and Sc/(Sc+Sa)]×100%, wherein Sc is a diffraction peak area of a crystalline component of the wax and the Sa is a diffraction peak area of an amorphous component of the wax; and wherein the Mp, Mn and Mw of the wax are all within the range of from about 500 to about 800, and wherein the wax has a polydispersity of from about 1 to about 1.05.Type: GrantFiled: November 14, 2005Date of Patent: February 16, 2010Assignee: Xerox CorporationInventors: Raj D. Patel, David J. Sanders, T Hwee Ng, Stephan V. Drappel, Sandra J. Gardner, Sonja Hadzidedic, Timothy L. Lincoln, Kevin F. Marcell, Louis V. Isganitis
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Patent number: 7553596Abstract: Embodiments include a toner with a distilled wax having a crystallinity of from about 55 to about 100 percent, wherein the degree of crystallinity is calculated using the following formulas: [Heat of enthalpy (Hm) J/g/294 J/g]×100=degree of crystallinity (Xc); [Heat of recrystallization (Hrc) J/g/294 J/g]×100=degree of crystallinity (Xc); and Sc/(Sc+Sa)]×100%, wherein Sc is a diffraction peak area of a crystalline component of the wax and the Sa is a diffraction peak area of an amorphous component of the wax; and wherein the Mp, Mn and Mw of the wax are all within the range of from about 500 to about 800, and wherein the wax has a polydispersity of from about 1 to about 1.05.Type: GrantFiled: November 14, 2005Date of Patent: June 30, 2009Assignee: Xerox CorporationInventors: Raj D. Patel, David J. Sanders, T Hwee Ng, Stephan V. Drappel, Sandra J. Gardner, Sonja Hadzidedic, Louis V. Isganitis, Timothy L. Lincoln, Kevin F. Marcell
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Publication number: 20090142692Abstract: Provided are a latex process and a toner process, both of which include the preparation of a latex having weight average molecular weight of from about 12×103 to about 24×103. The latex is manufactured under monomer-starved polymerization condition such as monomer feeding rate equal to or less than 0.516% per minute by weight of the monomer(s) to be fed. The toners prepared according to the present disclosure have gained improved properties such as gloss, fusing performance, crease performance, stripping performance, document offset, vinyl offset, and parent charging etc.Type: ApplicationFiled: February 9, 2009Publication date: June 4, 2009Applicant: XEROX CORPORATIONInventors: Daryl Vanbesien, Karen A. Moffat, Emily L. Moore, Kimberly D. Nosella, David J. Sanders, Christine Anderson, Cuong Vong
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Publication number: 20090130586Abstract: A method for forming toner particles includes polymerizing monomers to form a latex comprising polymer particles; combining the latex with an unsaturated curable resin to form aggregates containing the polymer particles and the unsaturated curable resin particles; and heating the aggregates to form coalesced particles. A toner composition that may be formed by the process described herein contains toner particles containing: (i) a polymer comprising a photoinitiator, (ii) an unsaturated curable resin and, (iii) a colorant.Type: ApplicationFiled: January 13, 2009Publication date: May 21, 2009Applicant: XEROX CORPORATIONInventors: Daryl W. VANBESIEN, Jennifer Lynne Belelie, Peter Gordon Odell, Christine Deborah Anderson, Cuong Vong, David J. Sanders, Aleksey Tabachnik
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Patent number: 7524602Abstract: Provided are a latex process and a toner process, both of which include the preparation of a latex having weight average molecular weight of from about 12×103 to about 24×103. The latex is manufactured under monomer-starved polymerization condition such as monomer feeding rate equal to or less than 0.516% per minute by weight of the monomer(s) to be fed. The toners prepared according to the present disclosure have gained improved properties such as gloss, fusing performance, crease performance, stripping performance, document offset, vinyl offset, and parent charging etc.Type: GrantFiled: June 20, 2005Date of Patent: April 28, 2009Assignee: Xerox CorporationInventors: Daryl Vanbesien, Karen A. Moffat, Emily L. Moore, Kimberly D. Nosella, David J. Sanders, Christine Anderson, Cuong Vong
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Patent number: 7494755Abstract: A method for forming toner particles includes polymerizing monomers to form a latex comprising polymer particles; combining the latex with unsaturated curable resin to form aggregates containing the polymer particles and the unsaturated curable resin particles; and heating the aggregates to form coalesced particles. A toner composition that may be formed by the process described herein contains toner particles containing polymer containing photoinitiator and unsaturated curable resin. Another toner composition that may be formed by the process described herein contains toner particles containing unsaturated curable resin and, on the surface of the toner particles, photoinitiator.Type: GrantFiled: November 30, 2005Date of Patent: February 24, 2009Assignee: Xerox CorporationInventors: Daryl W. Vanbesien, Jennifer Lynne Belelie, Peter Gordon Odell, Christine Deborah Anderson, Cuong Vong, David J. Sanders, Aleksey Tabachnik
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Patent number: 7485400Abstract: A developer includes a carrier and a toner, wherein the toner contains toner particles of at least one binder, at least one colorant, and external additives, wherein the developer has a trimmer clogging value in relation to toner triboelectric charge and toner cohesion expressed according to the equation (?0.80+0.039×(% toner cohesion)+0.026×(toner triboelectric charge) (?C/g)) of less than or equal to about 3.2.Type: GrantFiled: April 5, 2006Date of Patent: February 3, 2009Assignee: Xerox CorporationInventors: Richard P. N. Veregin, Cuong Vong, Vladislav Skorokhod, Jackie B. Parker, David J. Sanders
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Patent number: 7455943Abstract: The toner includes emulsion aggregation toner particles of a binder including a non-crosslinked styrene acrylate polymer, at least one colorant, at least one wax, and aluminized silica, wherein an amount of aluminum metal in the toner particles is from about 50 ppm to about 600 ppm. Such toner is able to provide a high level of gloss while maintaining a low minimum fixing temperature. The aluminized silica acts as a coagulant during the emulsion aggregation formation process of the toner.Type: GrantFiled: October 17, 2005Date of Patent: November 25, 2008Assignee: Xerox CorporationInventors: Raj D. Patel, Daryl W. Vanbesien, David J. Sanders, Allan K. Chen
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Patent number: 7413842Abstract: A toner process comprising aggregating or coagulating a latex emulsion comprising a resin, a colorant and wax particles using an amount of polymetal ion coagulant to provide core particles; heating the core particles to provide micron size aggregates; optionally adding a second resin emulsion; adding a sequestering or complexing component and a base to remove the polymetal ion in a controlled manner; further heating the mixture to provide toner particles; and optionally, isolating the toner particles.Type: GrantFiled: August 22, 2005Date of Patent: August 19, 2008Assignee: Xerox CorporationInventors: Daryl Vanbesien, David J. Sanders, Raj D. Patel, Christine D. Anderson, Patricia Ann Burns, Nam-Suk Ro
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Patent number: 7344813Abstract: A toner includes particles of a resin, an optional colorant, a first wax and a second wax, where the toner particles are prepared by an emulsion aggregation process. Additional waxes can also be added for different properties.Type: GrantFiled: May 5, 2005Date of Patent: March 18, 2008Assignee: Xerox CorporationInventors: Maura A. Sweeney, Grazyna E. Kmiecik-Lawrynowicz, Matthew L. Fabrizio, Robert D. Bayley, Karen A. Moffat, David J. Sanders, Enno E. Agur, Daryl W. Vanbesien
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Method of applying spot varnish to xerographic image and emulsion aggregation toners for use therein
Patent number: 7288347Abstract: 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: GrantFiled: August 31, 2004Date of Patent: October 30, 2007Assignee: Xerox CorporationInventors: David J. Sanders, Raj D. Patsetl, Michael A. Hopper -
Patent number: 7179575Abstract: A toner includes particles of a resin, an optional colorant, a first crystalline polymeric wax and a second crystalline polymeric wax, where the first crystalline polymeric wax is a crystalline polyethlene wax, the second crystalline polymeric wax is selected from aliphatic polar amide functionalized waxes, carboxylic acid-terminated polyethylene waxes, aliphatic waxes consisting of esters of hydroxylated unsaturated fatty acids, high acid waxes, and mixtures thereof, and the toner particles are prepared by an emulsion aggregation process.Type: GrantFiled: June 28, 2004Date of Patent: February 20, 2007Assignee: Xerox CorporationInventors: Karen A. Moffat, David J. Sanders, Enno E. Agur, Daryl W. Vanbesien
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Patent number: 7160661Abstract: A toner including particles of a resin, an optional colorant, and a crystalline wax, where the crystalline wax is selected from aliphatic polar amide functionalized waxes, carboxylic acid-terminated polyethylene waxes, aliphatic waxes consisting of esters of hydroxylated unsaturated fatty acids, high acid waxes, and mixtures thereof, is prepared by an emulsion aggregation process.Type: GrantFiled: June 28, 2004Date of Patent: January 9, 2007Assignee: Xerox CorporationInventors: Karen A. Moffat, Daryl W. Vanbesien, Enno E. Agur, Chu-heng Liu, David J. Sanders
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Patent number: 6576389Abstract: A process for the preparation of toner by, for example, mixing a colorant, a latex, a wax and a dual coagulant mixture comprising water solubilized silica with an alumina coating referred to as aluminized silica and a polyaluminum chloride to provide, for example, a toner composition of different gloss levels when fused.Type: GrantFiled: October 15, 2001Date of Patent: June 10, 2003Assignee: Xerox CorporationInventors: Daryl Vanbesien, Raj D. Patel, Michael A. Hopper, David J. Sanders, Kurt I. Halfyard, Danielle C. Boils
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Publication number: 20030073024Abstract: A process for the preparation of toner by, for example, mixing a colorant, a latex, a wax and a dual coagulant mixture comprising water solubilized silica with an alumina coating referred to as aluminized silica and a polyaluminum chloride to provide, for example, a toner composition of different gloss levels when fused.Type: ApplicationFiled: October 15, 2001Publication date: April 17, 2003Applicant: Xerox CorporationInventors: Daryl Vanbesien, Raj D. Patel, Michael A. Hopper, David J. Sanders, Kurt I. Halfyard, Danielle C. Boils
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Patent number: 5880062Abstract: Disclosed is a printing process which comprises (a) incorporating into a printing apparatus capable of generating ink jet images a carbonless paper set comprising a first sheet, a second sheet, and optional intermediate sheets situated between the first sheet and second sheet, wherein the first sheet comprises paper coated on one surface with a color former and the second sheet comprises paper coated on one surface with a color developer, and wherein, when the carbonless paper set is assembled, the surface of the first sheet coated with the color former is in contact with the surface of a sheet coated with the color developer and the surface of the second sheet coated with the color developer is in contact with the surface of a sheet coated with the color former; (b) incorporating into the printing apparatus an ink jet ink comprising water, an organic component, and a desensitizing agent capable of interacting either (i) with the color former so that the color former's subsequent ability to interact with theType: GrantFiled: June 16, 1993Date of Patent: March 9, 1999Assignee: Xerox CorporationInventors: David J. Sanders, Francoise M. Winnik, Marcel P. Breton
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Patent number: 5869215Abstract: A process for the preparation of toner including(i) blending an aqueous colorant dispersion with a latex blend comprised of a linear polymer and a soft crosslinked polymer;(ii) heating the resulting mixture at about below, or about equal to the glass transition temperature (Tg) of the linear latex polymer to form aggregates; and(iii) subsequently heating said aggregate suspension about above, or about equal to the Tg of the linear latex polymer to effect fusion or coalescence of said aggregates.Type: GrantFiled: January 13, 1998Date of Patent: February 9, 1999Assignee: Xerox CorporationInventors: Beng S. Ong, Walter Mychajlowskij, Patricia A. Burns, Raj D. Patel, David J. Sanders
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Patent number: 5858700Abstract: A process for isolating and purifying lycopene crystals from a biological lycopene source is disclosed. A lycopene-containing oleoresin is saponified in a composition of propylene glycol and aqueous alkali to form lycopene crystals. Crystallization is achieved without the use of added organic solvents. The crystals are isolated and purified. The substantially pure lycopene crystals so obtained are suitable for human consumption and can be used as a nutritional supplement and as an additive in food.Type: GrantFiled: April 3, 1997Date of Patent: January 12, 1999Assignee: Kemin Foods, LCInventors: Rodney L. Ausich, David J. Sanders
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Patent number: 5804349Abstract: A toner comprised of pigment, and an addition polymer resin generated from about 55 to about 80 weight percent of styrene, from about 1 to about 25 weight percent of acrylate, from about 1 to about 20 weight percent of acrylonitrile, and from about 0.5 to about 5 weight percent of acrylic acid.Type: GrantFiled: August 7, 1997Date of Patent: September 8, 1998Assignee: Xerox CorporationInventors: Beng S. Ong, Grazyna E. Kmiecik-Lawrynowicz, Raj D. Patel, Walter Mychajlowskij, David J. Sanders, T. Hwee Ng
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Patent number: D403031Type: GrantFiled: January 31, 1997Date of Patent: December 22, 1998Assignee: Th MJ Grant CompanyInventors: Grant R. Stousland, David J. Sanders