Patents by Inventor Jyothsna Ram
Jyothsna Ram 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: 8676071Abstract: Apparatus and method for minimizing ghosting defects and process control instabilities for a printing system are disclosed. According to an exemplary embodiment, a controller retrieves uniformity measurements of an interdocument zone (IDZ) and sheet zone (SZ). In response to the uniformity measurements, a transfer current IDZ level is controlled to minimize differences in subsequent charging, photodischarge and/or development associated with the IDZ and SZ.Type: GrantFiled: January 18, 2011Date of Patent: March 18, 2014Assignee: Xerox CorporationInventors: Charles H. Tabb, Eliud Robles-Flores, Moritz P. Wagner, Jyothsna Ram, Michael J. Turan, Robert E. Rosdahl, Jr.
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Patent number: 8442407Abstract: Disclosed are printing methods, apparatus and systems for developing a latent image recorded on a surface, for example, a photoreceptor with developer material. According to an exemplary embodiment, the development method applies a development field voltage between a development station donor member and a development station transport member as a function of a humidity measurement associated with the developer material, the humidity measurement providing a surrogate tribo measurement of the developer material.Type: GrantFiled: July 27, 2010Date of Patent: May 14, 2013Assignee: Xerox CorporationInventors: W. Bradford Willard, Kimberly Anne Stoll, David R. Stookey, Paul L. Jacobs, Robert W. Phelps, Jyothsna Ram
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Publication number: 20120183316Abstract: Apparatus and method for minimizing ghost defect are disclosed. Ghosting results in interdocument bands when paper size is changed and process control instability due to using the interdocument zone (IDZ) for voltage and density control. A controller retrieves feedback measurements of the IDZ and sheet zone (SZ) non-uniformity. In response to the measurements, the transfer current IDZ level is controlled to minimize differences in subsequent charging, photodischarge and development.Type: ApplicationFiled: January 18, 2011Publication date: July 19, 2012Applicant: XEROX CORPORATIONInventors: Charles H. Tabb, Eliud Robles-Flores, Moritz P. Wagner, Jyothsna Ram, Michael J. Turan, Robert E. Rosdahl, JR.
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Publication number: 20120028173Abstract: Disclosed are printing methods, apparatus and systems for developing a latent image recorded on a surface, for example, a photoreceptor with developer material. According to an exemplary embodiment, the development method applies a development field voltage between a development station donor member and a development station transport member as a function of a humidity measurement associated with the developer material, the humidity measurement providing a surrogate tribo measurement of the developer material.Type: ApplicationFiled: July 27, 2010Publication date: February 2, 2012Applicant: XEROX CORPORATIONInventors: W. Bradford Willard, Kimberly Anne Stoll, David R. Stookey, Paul L. Jacobs, Robert W. Phelps, Jyothsna Ram
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Patent number: 7807015Abstract: An adhesion promoter comprising a silane compound and at least one of (1) a release agent, or (2) an adhesive, and methods of applying the adhesion promoter.Type: GrantFiled: September 18, 2006Date of Patent: October 5, 2010Assignee: Xerox CorporationInventors: Jyothsna Ram, David P. Van Bortel, Guiqin Song, Nan-Xing Hu, T. Brian McAneney, Gordon Sisler, Stephan V. Drappel
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Patent number: 7424262Abstract: A cleaning agent having one or more active ingredient which may remove residual release agents from printed material and methods for using the cleaning agents are described herein.Type: GrantFiled: September 29, 2006Date of Patent: September 9, 2008Assignee: Xerox CorporationInventors: David P. Van Bortel, Jyothsna Ram, Alan Richard Kuntz
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Publication number: 20080080913Abstract: A cleaning agent having one or more active ingredient which may remove residual release agents from printed material and methods for using the cleaning agents are described herein.Type: ApplicationFiled: September 29, 2006Publication date: April 3, 2008Inventors: David P. Van Bortel, Jyothsna Ram, Alan Richard Kuntz
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Publication number: 20080071043Abstract: An adhesion promoter comprising a silane compound and at least one of (1) a release agent, or (2) an adhesive, and methods of applying the adhesion promoter.Type: ApplicationFiled: September 18, 2006Publication date: March 20, 2008Applicant: Xerox CorporationInventors: Jyothsna RAM, David P. VAN BORTEL, Guiqin SONG, Nan-Xing HU, T. Brian MCANENEY, Gordon SISLER, Stephan V. DRAPPEL
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Patent number: 6838013Abstract: Substantially transparent electrodes are formed on a substrate by a process including forming on the substrate, in order, a bottom high index layer, a metallic conductive layer, and a top high index layer with a conductivity of at least about 400 ?/square; and chemically etching the bottom high index layer, the top high index layer and the conductive layer to form discrete electrodes in the metallic conductive layer.Type: GrantFiled: June 12, 2002Date of Patent: January 4, 2005Assignee: 3M Innovative Properties CompanyInventors: Nancy S. Lennhoff, Jyothsna Ram
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Patent number: 6689544Abstract: An ablatable laminar imaging medium useful in the manufacture of a substantially transparent electrode assembly is disclosed. The laminar imaging medium comprises a substrate, a high-index metal oxide layer, an ablatable metallic conductive layer, a high-index conductive metal oxide layer, and an ablation enhancement layer. The ablation enhancement layer has an IR-absorption greater than the IR-absorption of said high-index conductive metal oxide layer and an IR-reflectivity less than the IR-reflectivity of said high-index conductive metal oxide layer. Presence in the laminar imaging medium of the ablation enhancement layer lowers the exposure threshold of the medium and improves ablation accuracy, both—when occasioned in the manufacture of LCD electrode patterns—resulting collectively and ultimately in a more reliably formed electrical architecture, less susceptible to unwanted “shorting”.Type: GrantFiled: June 13, 2002Date of Patent: February 10, 2004Assignee: 3M Innovative Properties CompanyInventors: Pradnya V. Nagarkar, James T. Richard, Linda S. Heath, Radha Sen, Jyothsna Ram
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Patent number: 6652981Abstract: Substantially transparent electrodes are formed on a substrate by a process including forming on the substrate, in order, a bottom high index layer, a metallic conductive layer, and a top high index layer with a conductivity of at least about 400 &OHgr;/square; and chemically etching the bottom high index layer, the top high index layer and the conductive layer to form discrete electrodes in the metallic conductive layer.Type: GrantFiled: May 12, 2000Date of Patent: November 25, 2003Assignee: 3M Innovative Properties CompanyInventors: Nancy S. Lennhoff, Jyothsna Ram
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Publication number: 20030129424Abstract: Substantially transparent electrodes are formed on a substrate by a process including forming on the substrate, in order, a bottom high index layer, a metallic conductive layer, and a top high index layer with a conductivity of at least about 400 &OHgr;/square; and chemically etching the bottom high index layer, the top high index layer and the conductive layer to form discrete electrodes in the metallic conductive layer.Type: ApplicationFiled: May 12, 2000Publication date: July 10, 2003Inventors: Nancy S. Lennhoff, Jyothsna Ram
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Publication number: 20020195435Abstract: An ablatable laminar imaging medium useful in the manufacture of a substantially transparent electrode assembly is disclosed. The laminar imaging medium comprises a substrate, a high-index metal oxide layer, an ablatable metallic conductive layer, a high-index conductive metal oxide layer, and an ablation enhancement layer. The ablation enhancement layer has an IR-absorption greater than the IR-absorption of said high-index conductive metal oxide layer and an IR-reflectivity less than the IR-reflectivity of said high-index conductive metal oxide layer. Presence in the laminar imaging medium of the ablation enhancement layer lowers the exposure threshold of the medium and improves ablation accuracy, both—when occasioned in the manufacture of LCD electrode patterns—resulting collectively and ultimately in a more reliably formed electrical architecture, less susceptible to unwanted “shorting”.Type: ApplicationFiled: June 13, 2002Publication date: December 26, 2002Inventors: Pradnya V. Nagarkar, James T. Richard, Linda S. Heath, Radha Sen, Jyothsna Ram
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Publication number: 20020182386Abstract: Substantially transparent electrodes are formed on a substrate by a process including forming on the substrate, in order, a bottom high index layer, a metallic conductive layer, and a top high index layer with a conductivity of at least about 400 &OHgr;/square; and chemically etching the bottom high index layer, the top high index layer and the conductive layer to form discrete electrodes in the metallic conductive layer.Type: ApplicationFiled: June 12, 2002Publication date: December 5, 2002Inventors: Nancy S. Lennhoff, Jyothsna Ram
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Patent number: 6485839Abstract: An ablatable laminar imaging medium useful in the manufacture of a substantially transparent electrode assembly is disclosed. The laminar imaging medium comprises a substrate, a high-index metal oxide layer, an ablatable metallic conductive layer, a high-index conductive metal oxide layer, and an ablation enhancement layer. The ablation enhancement layer has an IR-absorption greater than the IR-absorption of said high-index conductive metal oxide layer and an IR-reflectivity less than the IR-reflectivity of said high-index conductive metal oxide layer. Presence in the laminar imaging medium of the ablation enhancement layer lowers the exposure threshold of the medium and improves ablation accuracy, both—when occasioned in the manufacture of LCD electrode patterns—resulting collectively and ultimately in a more reliably formed electrical architecture, less susceptible to unwanted “shorting”.Type: GrantFiled: May 12, 2000Date of Patent: November 26, 2002Assignee: 3M Innovative Properties CompanyInventors: Pradnya V. Nagarkar, James T. Richard, Linda S. Heath, Carl A. Chiulli, Radha Sen, Jyothsna Ram, David W. McCarthy