Patents by Inventor Rukmini B. Lobo
Rukmini B. Lobo 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: 7449216Abstract: A gravure method for applying a discrete patch (12) of uniform coating to a moving web (14) includes defining a nip area (20) between a gravure roller (16) and a backing roller (22), moving the gravure roller to the nip to a precise lengthwise location on the web, and moving the gravure roller from the nip. The method is improved by controlling the speed of movement of the gravure roller to the nip, and controlling the speed of movement of the gravure roller from the nip thereby producing a discrete patch.Type: GrantFiled: November 12, 2004Date of Patent: November 11, 2008Assignee: Eastman Kodak CompanyInventors: Rukmini B. Lobo, James P. Heetderks, David A. Wakefield, Roger D. Beam, Mikel S. Hill, Alan R. Bentz, Charles S. Christ, Ralph P. Schultz
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Patent number: 7141349Abstract: A metal oxide coating and a method of forming the metal oxide coating are disclosed, wherein the metal oxide coating composition includes a metal oxide precursor of the metal oxide, the metal oxide, or a combination thereof, and a solvent of secondary or tertiary C4–C8 alcohol.Type: GrantFiled: October 12, 2004Date of Patent: November 28, 2006Assignee: Eastman Kodak CompanyInventors: Rukmini B. Lobo, Bradley K. Coltrain, Richard C. Van Hanehem
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Patent number: 7056551Abstract: Disclosed is a protective transparent overcoat comprising a protective polymer and a surfactant compound having multiple non-end-group hydrogen bonding groups directly or indirectly bonded to the backbone chain of the surfactant compound. The coating enables simplified manufacturing of a thermal sublimation dye transfer donor of high quality.Type: GrantFiled: April 29, 2005Date of Patent: June 6, 2006Assignee: Eastman Kodak CompanyInventors: Rukmini B. Lobo, David C. Boris, Scott A. Strong, Anita M. Fees
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Patent number: 6984035Abstract: Disclosed is a process for imaging a media for receiving jetted ink, including a support, coated with a hydrophobic film, bearing a predetermined array of three dimensional cells composed of hydrophobic walls and a hydrophilic base, the cell walls being composed of a material that fused subsequent to printing to provide an overcoat layer.Type: GrantFiled: August 11, 2004Date of Patent: January 10, 2006Assignee: Eastman Kodak CompanyInventors: Constantine N. Anagnostopoulos, Ravi Sharma, Mridula Nair, Kevin M. O'Connor, Michael P. Ewin, Rukmini B. Lobo
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Patent number: 6942950Abstract: Disclosed is a protective transparent overcoat comprising a protective polymer and a surfactant compound having multiple non-end-group hydrogen bonding groups directly or indirectly bonded to the backbone chain of the surfactant compound. The coating enables simplified manufacturing of a thermal sublimation dye transfer donor of high quality.Type: GrantFiled: August 26, 2002Date of Patent: September 13, 2005Assignee: Eastman Kodak CompanyInventors: Rukmini B. Lobo, David C. Boris, Scott A. Strong, Anita M. Fees
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Patent number: 6866715Abstract: A method and apparatus is disclosed for gravure coating a liquid reactive with the atmosphere onto a web. The gravure apparatus comprises an engraved gravure cylinder, an impression roller backing the web and pressing it onto the gravure cylinder to form a nip, a curtain or jet formation means to wet the surface of the gravure cylinder, and a doctor blade means for wiping excess coating liquid from the surface of the gravure cylinder prior to the nip. A shroud encompassing the gravure cylinder and the curtain or jet formation means creates a first zone between the nip and a partitioning baffle extending from the shroud, a second zone between the partitioning baffle and the doctor blade means, and a third zone between the doctor blade means and the nip. A gas non-reactive with the coating liquid is supplied to each zone by a gas distribution means such that the reaction rate of the coating liquid with the atmosphere is greatly reduced and the curtain or jet is not disrupted.Type: GrantFiled: January 27, 2004Date of Patent: March 15, 2005Assignee: Eastman Kodak CompanyInventors: Kenneth J. Ruschak, Rukmini B. Lobo, Jess A. Anderson, Richard A. Gilkey, David A. Wakefield
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Publication number: 20040038823Abstract: Disclosed is a protective transparent overcoat comprising a protective polymer and a surfactant compound having multiple non-end-group hydrogen bonding groups directly or indirectly bonded to the backbone chain of the surfactant compound. The coating enables simplified manufacturing of a thermal sublimation dye transfer donor of high quality.Type: ApplicationFiled: August 26, 2002Publication date: February 26, 2004Applicant: Eastman Kodak CompanyInventors: Rukmini B. Lobo, David C. Boris, Scott A. Strong, Anita M. Fees
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Patent number: 6582515Abstract: A coating element has a liquid deflector member for diverting doctored coating liquid away from the surface of a coating applicator roll. The liquid deflector member is arranged beneath a blade member that removes excess coating liquid from the surface of the coating applicator roll. Excess coating liquid follows a path away from the coating applicator roll surface and down the active face of the liquid deflector member, thereby avoiding contamination of the applicator roll surface.Type: GrantFiled: December 15, 1999Date of Patent: June 24, 2003Assignee: Eastman Kodak CompanyInventors: Ramasubramaniam Hanumanthu, Rukmini B. Lobo, Barry A. Fitzgerald
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Patent number: 6558466Abstract: An apparatus for coating a web of indeterminate length has a coating element comprising a liquid deflector member for diverting liquid away from a coating surface. The liquid deflector member is arranged beneath a blade member that removes excess coating liquid from the coating surface. Excess coating liquid follows a path away from the coating surface and down the liquid deflector member thereby avoiding contamination of the coating surface.Type: GrantFiled: December 15, 1999Date of Patent: May 6, 2003Assignee: Eastman Kodak CompanyInventors: Ramasubramaniam Hanumanthu, Rukmini B. Lobo, Barry A. Fitzgerald
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Publication number: 20030082352Abstract: Disclosed is a media for receiving jetted ink, comprising a support bearing a predetermined array of three dimensional cells composed of hydrophobic cell walls and having a hydrophilic base, the cell walls being composed of a material capable of being fused subsequent to printing to provide an overcoat layer.Type: ApplicationFiled: October 29, 2001Publication date: May 1, 2003Applicant: Eastman Kodak CompanyInventors: Constantine N. Anagnostopoulos, Ravi Sharma, Mridula Nair, Kevin M. O'Connor, Michael P. Ewin, Rukmini B. Lobo
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Publication number: 20020189539Abstract: A coating element has a liquid deflector member for diverting doctored coating liquid away from the surface of a coating applicator roll. The liquid deflector member is arranged beneath a blade member that removes excess coating liquid from the surface of the coating applicator roll. Excess coating liquid follows a path away from the coating applicator roll surface and down the active face of the liquid deflector member, thereby avoiding contamination of the applicator roll surface.Type: ApplicationFiled: December 15, 1999Publication date: December 19, 2002Inventors: RAMASUBRAMANIAM HANUMANTHU, RUKMINI B. LOBO, BARRY A. FITZGERALD
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Publication number: 20020174830Abstract: An apparatus for coating a web of indeterminate length has a coating element comprising a liquid deflector member for diverting liquid away from a coating surface. The liquid deflector member is arranged beneath a blade member that removes excess coating liquid from the coating surface. Excess coating liquid follows a path away from the coating surface and down the liquid deflector member thereby avoiding contamination of the coating surface.Type: ApplicationFiled: December 15, 1999Publication date: November 28, 2002Inventors: RAMASUBRAMANIAM HANUMANTHU, RUKMINI B. LOBO, BARRY A. FITZGERALD
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Patent number: 6303184Abstract: The present invention is a method of providing an imaging element which includes providing a gravure cylinder having an outer surface having a plurality cells. The surface of the cylinder is moved through a coating solution of a film forming organic polymer to fill the cells with coating solution. An imaging element is moved across the outer surface of the gravure cylinder to deposit the coating solution onto the imaging element such that a fraction of the imaging element of from 0.02 to 0.98 remains uncovered with coating solution. The coating solution is dried to form a discontinuous overcoat on the imaging element.Type: GrantFiled: May 14, 1999Date of Patent: October 16, 2001Assignee: Eastman Kodak CompanyInventors: Rukmini B. Lobo, Barry A. Fitzgerald, Lloyd A. Lobo, Mridula Nair
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Patent number: 6300045Abstract: The present invention is an imaging element which includes a support, an imaging layer superposed on a side of said support and an overcoat overlying the imaging layer. The overcoat is composed of an organic polymer. The overcoat is discontinuous such that a fraction of the surface area of the imaging layer remains uncovered by said polymer, wherein the fraction of area not covered by the said polymer is from 0.02 to 0.98. The present invention is a photographic which includes a support, a silver halide emulsion layer superposed on a side of said support and an overcoat overlying the silver halide layer. The overcoat is composed of an organic polymer. The overcoat is discontinuous such that a fraction of the surface area of the silver halide emulsion layer remains uncovered by said polymer, wherein the fraction of area not covered by the said polymer is from 0.02 to 0.98. In one embodiment, the discontinuous overcoat is a series of parallel stripes.Type: GrantFiled: January 5, 2001Date of Patent: October 9, 2001Assignee: Eastman Kodak CompanyInventors: Lloyd A. Lobo, Mridula Nair, Rukmini B. Lobo, Barry A. Fitzgerald
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Publication number: 20010005572Abstract: The present invention is an imaging element which includes a support, an imaging layer superposed on a side of said support and an overcoat overlying the imaging layer. The overcoat is composed of an organic polymer. The overcoat is discontinuous such that a fraction of the surface area of the imaging layer remains uncovered by said polymer, wherein the fraction of area not covered by the said polymer is from 0.02 to 0.98. The present invention is a photographic which includes a support, a silver halide emulsion layer superposed on a side of said support and an overcoat overlying the silver halide layer. The overcoat is composed of an organic polymer. The overcoat is discontinuous such that a fraction of the surface area of the silver halide emulsion layer remains uncovered by said polymer, wherein the fraction of area not covered by the said polymer is from 0.02 to 0.98. In one embodiment, the discontinuous overcoat is a series of parallel stripes.Type: ApplicationFiled: January 5, 2001Publication date: June 28, 2001Inventors: Lloyd A. Lobo, Mridula Nair, Rukmini B. Lobo, Barry A. Fitzgerald
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Patent number: 6197482Abstract: The present invention is an imaging element which includes a support, an imaging layer superposed on a side of said support and an overcoat overlying the imaging layer. The overcoat is composed of an organic polymer. The overcoat is discontinuous such that a fraction of the surface area of the imaging layer remains uncovered by said polymer, wherein the fraction of area not covered by the said polymer is from 0.02 to 0.98. The present invention is a photographic which includes a support, a silver halide emulsion layer superposed on a side of said support and an overcoat overlying the silver halide layer. The overcoat is composed of an organic polymer. The overcoat is discontinuous such that a fraction of the surface area of the silver halide emulsion layer remains uncovered by said polymer, wherein the fraction of area not covered by the said polymer is from 0.02 to 0.98. In one embodiment, the discontinuous overcoat is a series of parallel stripes.Type: GrantFiled: May 14, 1999Date of Patent: March 6, 2001Assignee: Eastman Kodak CompanyInventors: Lloyd A. Lobo, Mridula Nair, Rukmini B. Lobo, Barry A. Fitzgerald
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Patent number: 5885660Abstract: An apparatus for coating surfaces consists of a basin, open to the atmosphere, divided into two channels by a wall running perpendicular to the coating direction. Liquid is supplied to the primary channel, the channel farther from the curtain. A continuous, adjustable gap between the dividing wall and the bottom of the basin offers resistance to flow but passes the coating composition from the primary to the secondary channel. The secondary channel has an edge that is horizontal and relatively low so that the coating composition overflows it to form a free-falling curtain. The dividing wall, by providing flow resistance, assists in distributing the supplied coating composition along the length of the primary channel, and reduces any flow disturbances caused by the entering coating composition. The secondary channel promotes additional evening of the flow distribution before the curtain forms.Type: GrantFiled: January 22, 1998Date of Patent: March 23, 1999Assignee: Eastman Kodak CompanyInventors: Kenneth J. Ruschak, Rukmini B. Lobo, Barry A. Fitzgerald, Richard A. Gilkey, David A. Wakefield
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Patent number: 5426588Abstract: The present invention describes a method for engraving a gravure cylinder. The method includes determining the coverage of the liquid composition desired, and then selecting parameters including the stylus angle and compression angle. The channel width to cell width ratio and the wall width to cell width ratio are specified. From this the cell width, channel width and wall width are calculated. The gravure cylinder is engraved according to the stylus angle, compression angle, wall width, channel width and cell width.Type: GrantFiled: February 25, 1994Date of Patent: June 20, 1995Assignee: Eastman Kodak CompanyInventors: David W. Walters, Rukmini B. Lobo