Patents by Inventor Richard L. Schank
Richard L. Schank 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: 7205081Abstract: An imaging method utilizing an imaging member containing a supporting substrate, a layer of a charge carrier injecting surface, a hole blocking layer, an optional adhesive layer, a layer of a charge carrier transport material, a layer of an charge carrier generating material, an optional charge trapping layer, a crossed linked silicone rubber, and an electrically insulating overcoating layer. The member is first charged with electrostatic charges of a first polarity, charged a second time with electrostatic charges of a polarity opposite to said first polarity in order to substantially neutralize the charges residing on the electrically insulating surface of the member and exposed to an imagewise pattern of activating electromagnetic radiation whereby an electrostatic latent image is formed. The electrostatic latent image may be developed to form a visible image which may be transferred to a receiver member. The imaging member may be reused after erasure and cleaning.Type: GrantFiled: December 14, 2001Date of Patent: April 17, 2007Assignee: Xerox CorporationInventors: Merlin E. Scharfe, Richard L. Schank, William W. Limburg, Damodar M. Pai, Dale S. Renfer, John F. Yanus, Paul J. DeFeo
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Publication number: 20030113646Abstract: An imaging method utilizing an imaging member containing a supporting substrate, a layer of a charge carrier injecting surface, a hole blocking layer, an optional adhesive layer, a layer of a charge carrier transport material, a layer of an charge carrier generating material, an optional charge trapping layer, a crossed linked silicone rubber, and an electrically insulating overcoating layer. The member is first charged with electrostatic charges of a first polarity, charged a second time with electrostatic charges of a polarity opposite to said first polarity in order to substantially neutralize the charges residing on the electrically insulating surface of the member and exposed to an imagewise pattern of activating electromagnetic radiation whereby an electrostatic latent image is formed. The electrostatic latent image may be developed to form a visible image which may be transferred to a receiver member. The imaging member may be reused after erasure and cleaning.Type: ApplicationFiled: December 14, 2001Publication date: June 19, 2003Applicant: Xerox CorporationInventors: Merlin E. Scharfe, Richard L. Schank, William W. Limburg, Damodar M. Pai, Dale S. Renfer, John F. Yanus, Paul J. DeFeo
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Patent number: 6331370Abstract: An imaging member includes a charge generation layer and a contiguous charge transport layer containing a diamine and a compound within the scope of formula (II): wherein each R1 and R2 is independently one of an alkyl having 1 to 8 carbon atoms, aryl, alkaryl and aralkyl, where the aryl is a phenyl group or a condensed ring group, and where the alkyl group of the alkaryl and aralkyl has 1 to 4 carbon atoms, R3 and R4 are independently hydrogen or CH3, and R5 is one of an alkyl having 1 to 8 carbon atoms, aryl, alkaryl and aralkyl as defined above, or a disubstituted aminophenyl group wherein each substituent is independently one of an alkyl having 1 to 8 carbon atoms, aryl, alkaryl and aralkyl as defined above. A electrophotographic system includes a cleaning blade and the above imaging member drum.Type: GrantFiled: June 7, 1995Date of Patent: December 18, 2001Assignee: Xerox CorporationInventors: Richard L. Schank, William W. Limburg, Dale S. Renfer
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Patent number: 6291125Abstract: A terpolymer represented by formula is useful in particular in electrophotographic imaging members.Type: GrantFiled: November 1, 1999Date of Patent: September 18, 2001Assignee: Xerox CorporationInventors: Dale S. Renfer, John F. Yanus, William W. Limburg, Damodar M. Pai, Paul J. DeFeo, Richard L. Schank
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Patent number: 6183921Abstract: A crack resistant, curl-free electrophotographic imaging member includes a charge transport layer comprising an active charge transporting polymeric tetraaryl-substituted biphenyidiamine and a plasticizer.Type: GrantFiled: December 6, 1996Date of Patent: February 6, 2001Assignee: Xerox CorporationInventors: Robert C. U. Yu, William W. Limburg, Merlin E. Scharfe, David H. Pan, Dale S. Renfer, Richard L. Schank, Surendar Jeyadev
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Patent number: 5805964Abstract: An apparatus and process for reducing accumulation of toner from the surface of an electrode member in a development unit of an electrostatographic printing apparatus by providing an inorganic coating on at least a portion of the electrode member.Type: GrantFiled: April 29, 1997Date of Patent: September 8, 1998Assignee: Xerox CorporationInventors: Santokh S. Badesha, Arnold W. Henry, George J. Heeks, J. Stephen Kittelberger, John G. VanDusen, Suresh K. Ahuja, Merlin E. Scharfe, Richard L. Schank, Mark J. Hirsch
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Patent number: 5787329Abstract: An apparatus and process for reducing accumulation of toner from the surface of an electrode member in a development unit of an electrostatographic printing apparatus by providing an organic coating on at least a portion of the electrode member.Type: GrantFiled: April 29, 1997Date of Patent: July 28, 1998Assignee: Xerox CorporationInventors: John R. Laing, Edward J. Gutman, J. Stephen Kittelberger, John G. VanDusen, Suresh K. Ahuja, Merlin E. Scharfe, Richard L. Schank, Mark J. Hirsch, Santokh S. Badesha, Arnold W. Henry, George J. Heeks
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Patent number: 5761587Abstract: An apparatus for reducing accumulation of toner from the surface of an electrode member in a development unit of an electrostatographic printing apparatus which includes providing a low surface energy coating on at least a portion of the electrode member.Type: GrantFiled: April 29, 1997Date of Patent: June 2, 1998Assignee: Xerox CorporationInventors: John R. Laing, Edward J. Gutman, J. Stephen Kittelberger, John G. VanDusen, Suresh K. Ahuja, Merlin E. Scharfe, Richard L. Schank, Mark J. Hirsch, Santokh S. Badesha, Arnold W. Henry, George J. Heeks
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Patent number: 5728498Abstract: A flexible electrophotographic imaging member including a supporting substrate coated with at least one imaging layer comprising hole transporting material containing at least two long chain alkyl carboxylate groups dissolved or molecularly dispersed in a film forming binder.Type: GrantFiled: September 27, 1996Date of Patent: March 17, 1998Assignee: Xerox CorporationInventors: John F. Yanus, William W. Limburg, Dale S. Renfer, Richard L. Schank, Merlin E. Scharfe, Damodar M. Pai, Paul J. DeFeo
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Patent number: 5725986Abstract: An imaging process including providing an electrophotographic imaging member including a substrate, a charge generating layer and a charge transport layer including a small molecule hole transporting diarylamine, a small molecule hole transporting tritolyl amine and a film forming binder, depositing a uniform electrostatic charge on the imaging member with a corona generating device to which power is being supplied, the corona generating device comprising at least one bare metal wire adjacent to and spaced from the imaging member, exposing the imaging member with activating radiation in image configuration to form an electrostatic latent image, developing the latent image with marking particles to form a toner image, transfering the toner image to a receiving member, repeating the depositing, exposing, developing, transfering steps, resting the imaging member for at least 15 minutes under the corona generating device while the power to the corona generating device is removed and while the corona generating deType: GrantFiled: March 26, 1996Date of Patent: March 10, 1998Assignee: Xerox CorporationInventors: Steven J. Grammatica, Richard L. Schank, Paul J. DeFeo, Ronald E. Godlove, Robert J. Flanagan
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Patent number: 5709974Abstract: An electrophotographic imaging member including a charge generating layer, a charge transport layer and an overcoating layer, the transport layer including a charge transporting aromatic diamine molecule in a polystyrene matrix and the overcoating layer including a hole transporting hydroxy arylamine compound having at least two hydroxy functional groups and a polyamide film forming binder capable of forming hydrogen bonds with the hydroxy functional groups of the hydroxy arylamine compound. This imaging member is utilized in an imaging process.Type: GrantFiled: September 27, 1996Date of Patent: January 20, 1998Assignee: Xerox CorporationInventors: Huoy-Jen Yuh, Anthony M. Horgan, Damodar M. Pai, John S. Chambers, Richard L. Schank, John F. Yanus
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Patent number: 5702854Abstract: An electrophotographic imaging member including a supporting substrate coated with at least a charge generating layer, a charge transport layer and an overcoating layer, said overcoating layer comprising a dihydroxy arylamine dissolved or molecularly dispersed in a crosslinked polyamide matrix. The overcoating layer is formed by crosslinking a crosslinkable coating composition including a polyamide containing methoxy methyl groups attached to amide nitrogen atoms, a crosslinking catalyst and a dihydroxy amine, and heating the coating to crosslink the polyamide. The electrophotographic imaging member may be imaged in a process involving uniformly charging the imaging member, exposing the imaging member with activating radiation in image configuration to form an electrostatic latent image, developing the latent image with toner particles to form a toner image, and transferring the toner image to a receiving member.Type: GrantFiled: September 27, 1996Date of Patent: December 30, 1997Assignee: Xerox CorporationInventors: Richard L. Schank, Dale S. Renfer, William W. Limburg, Brendan W. Kunzmann, Damodar M. Pai
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Patent number: 5681679Abstract: A flexible electrophotographic imaging member including a supporting substrate and a resilient combination of at least one photoconductive layer and an overcoating layer, the at least one photoconductive layer comprising a hole transporting arylamine siloxane polymer and the overcoating comprising a crosslinked polyamide doped with a dihydroxy amine. This imaging member may be utilized in an imaging process including forming an electrostatic latent image on the imaging member, depositing toner particles on the imaging member in conformance with the latent image to form a toner image, and transferring the toner image to a receiving member.Type: GrantFiled: September 27, 1996Date of Patent: October 28, 1997Assignee: Xerox CorporationInventors: Richard L. Schank, William W. Limburg, Damodar M. Pai, John F. Yanus, Dale S. Renfer, Paul J. DeFeo, Merlin E. Scharfe
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Patent number: 5670291Abstract: A process for fabricating an electrophotographic imaging member includingproviding a substrate coated with at least one photoconductive layer,applying a coating composition to the photoconductive layer by dip coating to form a wet layer, the coating composition comprising finely divided amorphous silica particles, a dihydroxy amine charge transport material, an aryl charge transport material that is different from the dihydroxy amine charge transport material, a crosslinkable polyamide containing methoxy groups attached to amide nitrogen atoms and a crosslinking catalyst, at least one solvent for the hydroxy amine charge transport material, aryl charge transport material that is different from the dihydroxy amine charge transport material and the crosslinkable polyamide, andheating the wet layer to crosslink the polyamide and remove the solvent to form a dry layer in which the dihydroxy amine charge transport material and the aryl charge transport material are molecularly dispersed in a crosslinked polyamideType: GrantFiled: September 27, 1996Date of Patent: September 23, 1997Assignee: Xerox CorporationInventors: Anthony T. Ward, Richard L. Schank, John S. Chambers
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Patent number: 5606396Abstract: An electrostatographic imaging process is disclosed which includes providing a flexible electrostatographic, particularly electrophotographic, imaging belt including a substrate layer, a charge generating layer, charge transport layer, and two parallel longitudinal edges, the imaging belt having a charge transport layer tension strain of less than about 0.05 percent across the width of the belt, mounting the imaging belt on a plurality of spaced apart support rollers, transporting the belt around the support rollers, repeatedly applying a cross belt compression strain distributed in an arcuate gradient of increasing intensity from the longitudinal centerline of the belt to each of the edges of the belt, the strain applied at each of the edges of the belt repeatedly peaking to an intensity at the longitudinal edges of at least about 0.Type: GrantFiled: January 6, 1995Date of Patent: February 25, 1997Assignee: Xerox CorporationInventors: Robert C. U. Yu, Geoffrey M. T. Foley, Richard L. Post, William W. Limburg, Youti Kuo, Donald C. Von Hoene, Satchidanand Mishra, David H. Pan, Yonn K. Rasmussen, Dale S. Renfer, John F. Yanus, Richard L. Schank
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Patent number: 5582949Abstract: A process for coating flexible belt seams including providing a flexible belt having an outwardly facing surface and a welded seam, forming a smooth liquid coating on the welded seam, the liquid coating comprising a film forming polymer and a fugitive liquid carrier in which the belt surface is substantially insoluble, and removing the fugitive liquid carrier to form a smooth solid coating on the seam.Type: GrantFiled: December 27, 1990Date of Patent: December 10, 1996Assignee: Xerox CorporationInventors: Richard W. Bigelow, Jeffrey W. Drawe, Richard L. Schank
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Patent number: 5436099Abstract: An electrophotographic imaging member including a substrate, a charge generating layer, a charge transport layer, and an overcoat layer comprising a hole transporting hydroxy arylamine compound having at least two hydroxy functional groups, hydroxy terminated diorgano siloxane and a polyamide film forming binder capable of forming hydrogen bonds with the hydroxy functional groups of the hydroxy arylamine compound and the hydroxy terminated diorgano siloxane.Type: GrantFiled: December 21, 1993Date of Patent: July 25, 1995Assignee: Xerox CorporationInventors: Richard L. Schank, James R. Esser, Robert W. Hedrick
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Patent number: 5368967Abstract: An electrophotographic imaging member comprising a substrate, a charge generating layer, a charge transport layer, and an overcoat layer comprising a small molecule hole transporting arylamine having at least two hydroxy functional groups, a hydroxy or multihydroxy triphenyl methane and a polyamide film forming binder capable of forming hydrogen bonds with the hydroxy functional groups the hydroxy arylamine and hydroxy or multihydroxy triphenyl methane. This overcoat layer may be fabricated using an alcohol solvent. This electrophotographic imaging member may be utilized in an electrophotographic imaging process.Type: GrantFiled: December 21, 1993Date of Patent: November 29, 1994Assignee: Xerox CorporationInventors: Richard L. Schank, Damodar M. Pai, John F. Yanus, Dale S. Renfer, Paul J. DeFeo, William W. Limburg
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Patent number: 5230976Abstract: Electrophotographic imaging members are disclosed which incorporate a charge transport layer comprising an arylamine/siloxane polymer.Type: GrantFiled: December 27, 1991Date of Patent: July 27, 1993Assignee: Xerox CorporationInventors: Richard L. Schank, John Yanus
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Patent number: 5204201Abstract: An improved organic photoreceptor is disclosed which is coated with a clear polymer film to prevent aromatic amine transport molecule leakage and binder cracking when exposed to liquid toner developers. The polymer film may also be overcoated with a polysiloxane layer to provide additional abrasion resistance.Type: GrantFiled: December 18, 1991Date of Patent: April 20, 1993Assignee: Xerox CorporationInventors: Richard L. Schank, John A. Bergfjord