Patents by Inventor Huoy-Jen Yuh
Huoy-Jen Yuh 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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Publication number: 20030143362Abstract: A seamed or seamless intermediate transfer member comprising a layer having an oxidized charge transport molecule, a charge transport molecule, or mixtures thereof, wherein in the seamed embodiment, the seam adhesive may also include an oxidized charge transport molecule, a charge transport molecule, or mixtures thereof.Type: ApplicationFiled: December 13, 2001Publication date: July 31, 2003Applicant: Xerox CorporationInventors: Bing R. Hsieh, Robert C.U. Yu, Satchidanand Mishra, T. Edwin Freeman, Eugene A. Swain, Anthony M. Horgan, Huoy-Jen Yuh, Geoffrey M. T. Foley
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Patent number: 6600888Abstract: A method including: (a) dispensing an electrically conductive liquid into a contact member permeable to the liquid; (b) rubbing the contact member and a surface against each other, at a contact length greater than a tangential contact length, to release the liquid from the contact member to wet the surface with the electrically conductive liquid in a layer ranging in thickness from about 1 to about 100 micrometers; and (c) electrifying the liquid at any time effective for imparting an electrical charge to the surface.Type: GrantFiled: November 2, 2001Date of Patent: July 29, 2003Assignee: Xerox CorporationInventors: Satchidanand Mishra, Zoran D. Popovic, Anthony M. Horgan, Robert C. U. Yu, Geoffrey M. T. Foley, Huoy-Jen Yuh, Eugene A. Swain
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Publication number: 20030086724Abstract: A method including: (a) dispensing an electrically conductive liquid into a contact member permeable to the liquid; (b) rubbing the contact member and a surface against each other, at a contact length greater than a tangential contact length, to release the liquid from the contact member to wet the surface with the electrically conductive liquid in a layer ranging in thickness from about 1 to about 100 micrometers; and (c) electrifying the liquid at any time effective for imparting an electrical charge to the surface.Type: ApplicationFiled: November 2, 2001Publication date: May 8, 2003Applicant: Xerox CorporationInventors: Satchidanand Mishra, Zoran D. Popovic, Anthony M. Horgan, Robert C.U. Yu, Geoffrey M.T. Foley, Huoy-Jen Yuh, Eugene A. Swain
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Patent number: 6495300Abstract: A photoconductive imaging member containing an optional supporting substrate, a photogenerating layer, a charge transport layer, and an overcoating layer comprised of a crosslinked composite polysiloxane-silica generated from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II) in the presence of silica particles and water wherein A, B, D, and F represent the segments of the polymer backbone; E is a hole transporting moiety; X is selected from the group consisting of halide, cyano, alkoxy, acyloxy, and aryloxy; a, b, c, and d each represent mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to about 1; R is alkyl, substituted alkyl, aryl, or substituted aryl, and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halide, cyano, and amino, subject to the provision that two of R1, R2, and R3 are each independently selected from thType: GrantFiled: July 2, 2001Date of Patent: December 17, 2002Assignee: Xerox CorporationInventors: Yu Qi, Beng S. Ong, Cheng-Kuo Hsiao, Ping Liu, Huoy-Jen Yuh, John S. Chambers, Helen R. Cherniack
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Patent number: 6444386Abstract: A photoconductive imaging member containing a supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is generated from crosslinking an organosilane (I) in the presence of a hydroxy-functionalized polymer (II) for example, wherein R is alkyl or aryl, R1, R2, and R3 are independently selected from the group consisting of alkoxy, aryloxy, acyloxy, halide, cyano, and amino; A and B are respectively divalent and trivalent repeating units of polymer (II); D is a divalent linkage; x and y represent the mole fractions of the repeating units of A and B, respectively, and wherein x is from about 0 to about 0.99, and y is from about 0.01 to about 1, and wherein the sum of x+y is equal to about 1.Type: GrantFiled: April 13, 2001Date of Patent: September 3, 2002Assignee: Xerox CorporationInventors: Ping Liu, Cheng-Kuo Hsiao, Beng S. Ong, Timothy J. Fuller, Huoy-Jen Yuh, Helen R. Cherniack, Markus R. Silvestri
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Patent number: 6383699Abstract: This invention pertains to an electrographic photosensitive material comprising a blocking layer, an electroconductive substrate layer and a charge generation layer, where the blocking layer comprises TiO2 with an average particle size less than about 50 nm and a quaternary ammonium salt, and where the quaternary ammonium salt is uniformly distributed in the blocking layer and is less than about 5 wt % of the blocking layer. In another aspect, this invention pertains to an image forming apparatus for forming images on a recording medium comprising an imaging light having a wavelength and an organic photoreceptor having a blocking layer, an electroconductive substrate layer, and a charge generation layer, where the blocking layer comprises TiO2 particles and a quaternary ammonium salt, and where the quaternary ammonium salt is uniformly distributed in the blocking layer and is less than about 5 wt % of the blocking layer.Type: GrantFiled: January 24, 2001Date of Patent: May 7, 2002Assignee: Xerox CorporationInventors: Huoy-Jen Yuh, William W. Limburg
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Patent number: 6372396Abstract: A process including providing at least a flexible substrate layer having a first major surface on one side and a second major surface on a second side opposite the first major surface, the first major surface being an exposed surface, applying a coating of an anticurl backing layer dispersion on the first major surface of the substrate layer, the dispersion comprising a volatile carrier liquid, a film forming polymer dissolved in the volatile carrier liquid, solid organic particles dispersed in the volatile carrier liquid, and an organic additive dissolved in the volatile carrier liquid, the organic additive represented by the structural formula: wherein m is a number from 1 to 99, n is a number from 1 to 99, p is an integer between 1 and 10, f is an integer between 1 and 8, and I is an integer between 10 and 500, and drying the coating to remove the volatile carrier and form a dried anticurl backing layer.Type: GrantFiled: October 20, 2000Date of Patent: April 16, 2002Assignee: Xerox CorporationInventors: Robert C. U. Yu, Satchidanand Mishra, Kathleen M. Carmichael, Richard L. Post, Bing R. Hsieh, Anthony M. Horgan, Edward F. Grabowski, Donald C. Von Hoene, Huoy-Jen Yuh, Michael S. Roetker
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Patent number: 6337166Abstract: A charge transport layer material for a photoreceptor includes at least a polycarbonate polymer binder having a number average molecular weight of not less than 35,000, at least one charge transport material, polytetrafluoroethylene particle aggregates having an average size of less than about 1.5 microns and a fluorine-containing polymeric surfactant dispersed in a solvent mixture of at least tetrahydrofuran and toluene. The dispersion is able to form a uniform and stable material ideal for use in forming a charge transport layer of a photoreceptor. The resultant charge transport layer exhibits excellent wear resistance against contact with an AC bias charging roll, excellent electrical performance, and delivers superior print quality.Type: GrantFiled: November 15, 2000Date of Patent: January 8, 2002Assignee: Xerox CorporationInventors: John S. Chambers, Huoy-Jen Yuh, Michael Sanchez, Cindy C. Chen, Harold F. Hammond, Abukar Wehelie, Helen R. Cherniack, Robert C. U. Yu, John S. Facci, Rachael Mc Grath
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Patent number: 6326111Abstract: A charge transport layer material for a photoreceptor includes at least a polycarbonate polymer, at least one charge transport material, polytetrafluoroethylene particle aggregates having an average size of less than about 1.5 microns, hydrophobic silica and a fluorine-containing polymeric surfactant dispersed in a solvent. The presence of the hydrophobic silica enables the dispersion to have superior stability by preventing settling of the PTFE particles. A resulting charge transport layer produced from the dispersion exhibits excellent wear resistance against contact with an AC bias charging roll, excellent electrical performance, and delivers superior print quality.Type: GrantFiled: November 15, 2000Date of Patent: December 4, 2001Assignee: Xerox CorporationInventors: John S. Chambers, Huoy-Jen Yuh, Michael Sanchez, Harold F. Hammond, Helen R. Cherniack, Robert C. U. Yu, John S. Facci, Rachael McGrath
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Patent number: 6300027Abstract: An imaging member includes a substrate, a charge generating layer, and a charge transport layer, wherein an external layer of the imaging member includes hydrophobic silica particles uniformly dispersed therein.Type: GrantFiled: November 15, 2000Date of Patent: October 9, 2001Assignee: Xerox CorporationInventors: John S. Chambers, Abukar Wehelie, Huoy-Jen Yuh, Harold F. Hammond
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Patent number: 6287737Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked polymer derived from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II) and water wherein A, B, D, and F represent the segments of the polymer backbone; E is an electron transporting moiety; X is selected from the group consisting of halide, cyano, alkoxy, acyloxy, and aryloxy; a, b, c, and d are mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to 1; R is alkyl, substituted alkyl, aryl, or substituted aryl; and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halogen, cyano, and amino, subject to the provision that two of R1, R2, and R3 are independently selected from the group consisting of alkoxy, arylType: GrantFiled: May 30, 2000Date of Patent: September 11, 2001Assignee: Xerox CorporationInventors: Beng S. Ong, Ping Liu, Cheng-Kuo Hsiao, Huoy-Jen Yuh, John S. Chambers, Damodar M. Pai, Markus R. Silvestri, Kathleen M. Carmichael
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Patent number: 6277535Abstract: An electrophotographic imaging member includes a supporting substrate, an undercoating layer, an optional adhesive layer, a photogenerating layer, and a charge transporting layer.Type: GrantFiled: April 14, 2000Date of Patent: August 21, 2001Assignee: Xerox CorporationInventors: Ping Liu, Yu Qi, Beng S. Ong, Cheng-Kuo Hsiao, Helen R. Cherniack, Huoy-Jen Yuh
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Patent number: 6270850Abstract: A method for improving the quality of a dip coated layer that is deposited by flowing a solution along a substrate in a gap between the substrate and a wall, including: (a) determining a yield stress, a viscosity, a density, and a surface tension of the solution, and selecting a wet thickness of the coated layer; (b) determining a coating speed based on the determined viscosity, the determined density, the determined surface tension of the solution, and the selected wet layer thickness; and (c) selecting a distance for the gap and calculating the shear stress of the solution in the gap based on the gap distance, wherein the shear stress is greater than the yield stress.Type: GrantFiled: June 10, 1999Date of Patent: August 7, 2001Assignee: Xerox CorporationInventors: Jian Cai, Huoy-Jen Yuh, Merlin E. Scharfe, Robert F. Dunham
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Patent number: 6261729Abstract: A photoreceptor including: (a) a substrate; (b) a charge blocking layer including n-type particles and a linear phenolic binder composition; and (c) an imaging layer.Type: GrantFiled: April 7, 2000Date of Patent: July 17, 2001Assignee: Xerox CorporationInventors: Huoy-Jen Yuh, Zhilei Wang, Daniel G. Hullihen, Jr., John S. Chambers, Harold F. Hammond
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Patent number: 6255027Abstract: A photoreceptor including: (a) a substrate; (b) a charge blocking layer including a plurality of light scattering particles dispersed in a binder, wherein the light scattering particles are composed of a core and a coating over the core, wherein the difference between the coating and the binder refractive index values is greater than the difference between the core and the binder refractive index values; and (c) an imaging layer.Type: GrantFiled: May 22, 2000Date of Patent: July 3, 2001Assignee: Xerox CorporationInventors: Abukar H. Wehelie, John S. Chambers, Huoy-Jen Yuh, Harold F. Hammond
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Patent number: 6238833Abstract: A composition including: a polymeric compound including a polyvinyl butyral moiety, an optional polyvinyl alcohol moiety, an optional polyvinyl acetate moiety, and a modified polyvinyl moiety of the formula where R is an organic substituent, wherein the polyvinyl alcohol moiety has a hydroxyl content that ranges from 0% to about 5% by weight when —OR is an acetate.Type: GrantFiled: September 1, 1999Date of Patent: May 29, 2001Assignee: Xerox CorporationInventors: John S. Chambers, Huoy-Jen Yuh, H. Bruce Goodbrand
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Patent number: 6218062Abstract: A photoreceptor including: (a) a substrate; (b) a charge generating layer including a binder, a n-type charge generating material, and a plurality of needle shaped n-type particles; and (c) a charge transport layer, wherein the charge generating layer and the charge transport layer are in any sequence over the substrate.Type: GrantFiled: October 12, 1999Date of Patent: April 17, 2001Assignee: Xerox CorporationInventors: Huoy-Jen Yuh, John S. Chambers
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Patent number: 6200716Abstract: A photoreceptor including: (a) a substrate; (b) a charge blocking layer comprising a polymer polymerized fiom at least one monomer including vinylbenzyl alcohol monomer; and (c) at least one imaging layer.Type: GrantFiled: November 15, 1999Date of Patent: March 13, 2001Assignee: Xerox CorporationInventors: Timothy J. Fuller, Huoy-Jen Yuh, John S. Chambers, Harold F. Hammond, Damodar M. Pai, John F. Yanus, Markus R. Silvestri, Helen R. Cherniack
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Patent number: 6177219Abstract: A photoreceptor comprising: (a) a substrate; (b) a charge blocking layer including a binder, a plurality of grain shaped n-type particles, and a plurality of needle shaped n-type particles, wherein the grain shaped particles have a higher concentration in the blocking layer than the needle shaped particles; and (c) an imaging layer.Type: GrantFiled: October 12, 1999Date of Patent: January 23, 2001Assignee: Xerox CorporationInventors: Huoy-Jen Yuh, Zhilei Wang
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Patent number: 6165660Abstract: A process for forming an imaging member, includes providing an imaging member substrate, and applying at least a charge generating layer and a charge transport layer to the substrate, where at least one of the charge generating layer and the charge transport layer is applied from a coating solution in a dip coating process wherein a residence time of the substrate in the coating solution is greater than 1 second. The photoreceptor exhibits increased adhesion between the charge generating layer and the charge transport layer, as well as between other layers.Type: GrantFiled: November 29, 1999Date of Patent: December 26, 2000Assignee: Xerox CorporationInventors: John S Chambers, Huoy-Jen Yuh, Robert E McCumiskey