Patents by Inventor Raj B. Apte
Raj B. Apte 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: 6467862Abstract: A cartridge is disclosed for use in a marking apparatus in which a propellant stream is passed through a channel and directed toward a substrate. Marking material, such as ink, toner, etc., is controllably introduced into the propellant stream and imparted with sufficient kinetic energy thereby to be made incident upon a substrate. A multiplicity of channels for directing the propellant and marking material allow for high throughput, high resolution marking. Multiple marking materials may be introduced into the channel and mixed therein prior to being made incident on the substrate, or mixed or superimposed on the substrate without re-registration. The cartridge may be replacably attached to the marking apparatus, and may contain one or more marking materials, propellant, etc.Type: GrantFiled: September 30, 1998Date of Patent: October 22, 2002Assignee: Xerox CorporationInventors: Eric Peeters, Jaan Noolandi, Raj B. Apte, Philip D. Floyd, Jonathan A. Small, Gregory J. Kovacs, Meng H. Lean, Armin R. Volkel, Steven B. Bolte, An-Chang Shi, Frederick J. Endicott, Gregory B. Anderson, Dan A. Hays, Joel A. Kubby, Warren B. Jackson
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Patent number: 6454384Abstract: A method of marking is disclosed in which a propellant stream is passed through a channel and directed toward a substrate. Liquid marking material, such as ink, is controllably introduced into the propellant stream and imparted with sufficient kinetic energy thereby to be made incident upon a substrate. A multiplicity of channels for directing the propellant and marking material allow for high throughput, high resolution marking. Multiple marking materials may be introduced into the channel and mixed therein prior to being made incident on the substrate, or mixed or superimposed on the substrate without registration. One example is a single-pass, full-color printer.Type: GrantFiled: September 30, 1998Date of Patent: September 24, 2002Assignee: Xerox CorporationInventors: Eric Peeters, Jaan Noolandi, Raj B. Apte, Philip D. Floyd, Jonathan A. Small, Gregory J. Kovacs, Meng H. Lean, Armin R. Volkel, Steven B. Bolte, An-Chang Shi, Frederick J. Endicott, Gregory B. Anderson, Dan A. Hays, Joel A. Kubby, Warren B. Jackson, Andrew A. Berlin, G. A. Neville Connell
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Publication number: 20020105568Abstract: A method for treating a substrate is disclosed in which a propellant stream is passed through a channel and directed toward a substrate. Substrate pre-marking or post-marking treatment material is controllably introduced into the propellant stream and imparted with sufficient kinetic energy thereby to be made incident upon a substrate. A multiplicity of channels for directing the propellant and treatment material allow for high throughput, high resolution in-situ treatment. Marking materials and treatment materials may be introduced into the channel and mixed therein prior to being made incident on the substrate, or mixed or superimposed on the substrate without re-registration. One example is a single-pass, full-color printer.Type: ApplicationFiled: September 30, 1998Publication date: August 8, 2002Inventors: ERIC PEETERS, JAAN NOOLANDI, RAJ B. APTE, PHILIP D. FLOYD, JONATHAN A. SMALL, GREGORY J. KOVACS, MENG H. LEAN, ARMIN R. VOLKEL, STEVEN B. BOLTE, AN-CHANG SHI, FREDERICK J. ENDICOTT, GREGORY B. ANDERSON, DAN A. HAYS, JOEL A. KUBBY, WARREN B. JACKSON, KAREN A. MOFFAT, T. BRIAN MCANENEY, RICHARD P.N. VEREGIN, MARIA N.V. MCDOUGALL, DANIELLE C. BOILS, PAUL D. SZABO
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Patent number: 6416157Abstract: A method of marking employs a marking apparatus in which a propellant stream is passed through a channel and directed toward a substrate. Marking material, such as ink, toner, etc., is controllably introduced into the propellant stream and imparted with sufficient kinetic energy thereby to be made incident upon a substrate. At sufficient velocity, and with appropriate marking material, the marking material may be kinetically fused to the substrate. A multiplicity of channels for directing the propellant and marking material allow for high throughput, high resolution marking. Multiple marking materials may be introduced into the channel and mixed therein prior to being made incident on the substrate, or mixed or superimposed on the substrate without registration. One example is single-pass, full-color printing.Type: GrantFiled: September 30, 1998Date of Patent: July 9, 2002Assignee: Xerox CorporationInventors: Eric Peeters, Jaan Noolandi, Raj B. Apte, Philip D. Floyd, Jonathan A. Small, Gregory J. Kovacs, Meng H. Lean, Armin R. Volkel, Steven B. Bolte, An-Chang Shi, Frederick J. Endicott, Gregory B. Anderson, Dan A. Hays, Joel A. Kubby, Warren B. Jackson
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Patent number: 6408054Abstract: Image contrast grids include a body having openings and an x-ray absorbing material in the openings. The openings can be formed by various micromachining techniques and the x-ray absorbing material can be formed in the openings by various coating and deposition techniques. The image contrast grids can have contoured surfaces for improved focusing capabilities. The image contrast grids can remove Compton scattered x-rays in two, non-normal dimensions. The openings can be formed with fine structures that are not visible in most imaging modes.Type: GrantFiled: November 24, 1999Date of Patent: June 18, 2002Assignee: Xerox CorporationInventors: Jeffrey T. Rahn, Raj B. Apte
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Patent number: 6340216Abstract: An apparatus for treating a substrate is disclosed in which a propellant stream is passed through a channel and directed toward a substrate. Substrate pre-marking or post-marking treatment material is controllably introduced into the propellant stream and imparted with sufficient kinetic energy thereby to be made incident upon a substrate. A multiplicity of channels for directing the propellant and treatment material allow for high throughput, high resolution in-situ treatment. Marking materials and treatment materials may be introduced into the channel and mixed therein prior to being made incident on the substrate, or mixed or superimposed on the substrate without registration. One example is a single-pass, full-color printer.Type: GrantFiled: September 30, 1998Date of Patent: January 22, 2002Assignee: Xerox CorporationInventors: Eric Peeters, Jaan Noolandi, Raj B. Apte, Philip D. Floyd, Jonathan A. Small, Gregory J. Kovacs, Meng H. Lean, Armin R. Volkel, Steven B. Bolte, An-Chang Shi, Frederick J. Endicott, Gregory B. Anderson, Dan A. Hays, Joel A. Kubby, Warren B. Jackson, Karen A. Moffat, T. Brian McAneney, Richard P. N. Veregin, Maria N. V. McDougall, Danielle C. Boils, Paul D. Szabo
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Patent number: 6328409Abstract: A marking apparatus is disclosed in which a propellant stream is passed through a channel and directed toward a substrate. A liquid marking material, such as ink, is controllably introduced into the propellant stream and imparted with sufficient kinetic energy thereby to be made incident upon a substrate. A multiplicity of channels for directing the propellant and marking material allow for high throughput, high resolution marking. Multiple marking materials may be introduced into the channel and mixed therein prior to being made incident on the substrate, or mixed or superimposed on the substrate without registration. One example is a single-pass, full-color printer.Type: GrantFiled: September 30, 1998Date of Patent: December 11, 2001Assignee: Xerox CorporationInventors: Eric Peeters, Jaan Noolandi, Raj B. Apte, Philip D. Floyd, Jonathan A. Small, Gregory J. Kovacs, Meng H. Lean, Armin R. Volkel, Steven B. Bolte, An-Chang Shi, Frederick J. Endicott, Gregory B. Anderson, Dan A. Hays, Joel A. Kubby, Warren B. Jackson, Andrew A. Berlin, G. A. Neville Connell
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Patent number: 6252215Abstract: A pixel circuit construction for image sensing includes a photosensor, an amplifier, a selector switch and, and a reset switch. The amplifier may be a single polycrystalline silicon (channel) transistor for high gain. The selector switch may also be a single polycrystalline silicon (channel) transistor for high conductivity. The reset switch may a single amorphous crystalline silicon (channel) transistor for low leakage current. The photosensor and amplifier may be connected to a shared bias line or may be connected to separate bias and drive lines, respectively. The selector and reset switches may be connected to a shared data line or may be connected to separate data and reset lines, respectively. Laser crystallization and rehydrogenation techniques are well suited to obtaining devices described herein. Gate line and drive voltage line synchronization is provided.Type: GrantFiled: April 28, 1998Date of Patent: June 26, 2001Assignee: Xerox CorporationInventors: Ping Mei, Andrew J. Moore, Raj B. Apte, Steven E. Ready, Robert A. Street, James B. Boyce
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Patent number: 6201633Abstract: A micro-electromechanical bistable shutter display device is provided capable of being implemented for both small screen, high resolution devices and for large billboard-type displays. The micro-electromechanical shutter assembly has bi-stability characteristics which allow the use of only a holding voltage to maintain an image. The micro-electromechanical shutter assembly includes a shutter having petal-like shutter segments covering reflective or transmittive films. To expose the film in a particular shutter assembly, its shutter segments are moved from the horizontal to a vertical position using electrostatic attraction forces to “collapse” the torsionally-hinged shutter segments. The shutter assembly can have a number of segments, as long as the resulting shutter assembly shape can be stacked to form a dense 2D array.Type: GrantFiled: June 7, 1999Date of Patent: March 13, 2001Assignee: Xerox CorporationInventors: Eric Peeters, Jackson Ho, Feixia Pan, Raj B. Apte, Joel A. Kubby, Ronald T. Fulks, Decai Sun, Patrick Y. Maeda, David Fork, Robert Thornton, Ross Bringans, G. A. Neville Connell, Philip Don Floyd, Tuan Anh Vo, Koenraad Van Schuylenbergh
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Patent number: 6180428Abstract: A micro-machined movable light emitting assembly is formed on or from an undoped or pure III-V substrate or formed on or from a doped III-V substrate. The movable light emitting assemblies are to be actuated using force generators, to generate the various mechanical degrees of freedom depending on the type of stage suspension and actuation.Type: GrantFiled: October 15, 1998Date of Patent: January 30, 2001Assignee: Xerox CorporationInventors: Eric Peeters, Decai Sun, G. A. Neville Connell, Ross D. Bringans, Raj B. Apte, Thomas L. Paoli, Patrick Y. Maeda, David K. Fork, Joel A. Kubby, Philip D. Floyd
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Patent number: 6177236Abstract: A pixelized scintillation layer is taught in which high aspect ratio columns of scintillation material are formed. The columns may be sized and spaced to correspond to the sizing and spacing of an underlying sensor array, or they may be sized such that there is plurality of columns for each pixel. A method for forming the pixelized scintillation layer includes the step of forming openings such as wells, vias, or channels in a body, for example by etching a thick photoresist, ion beam etching, anodic etching, etc., and the step of filling the openings with scintillation material. A completed image sensing apparatus is also taught.Type: GrantFiled: December 5, 1997Date of Patent: January 23, 2001Assignee: Xerox CorporationInventor: Raj B. Apte
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Patent number: 6136210Abstract: A method of fabricating a lens comprising providing a photosoluble substrate having opposed first and second surfaces; exposing one of the surfaces of the substrate to a photoactive etchant; and exposing said etchant to patterned light such that a convex or concave, generally semi-spherical bulge or recess is formed in said substrate.Type: GrantFiled: November 2, 1998Date of Patent: October 24, 2000Assignee: Xerox CorporationInventors: David K. Biegelsen, Scott A. Elrod, Raj B. Apte, Donald Smith
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Patent number: 6116756Abstract: A micro-machined movable light emitting assembly is formed on or from an undoped or pure III-V substrate or formed on or from a doped III-V substrate. The movable light emitting assemblies are to be actuated using force generators, to generate the various mechanical degrees of freedom depending on the type of stage suspension and actuation.Type: GrantFiled: October 15, 1998Date of Patent: September 12, 2000Assignee: Xerox CorporationInventors: Eric Peeters, Decai Sun, G. A. Neville Connell, Ross D. Bringans, Raj B. Apte, Thomas L. Paoli, Patrick Y. Maeda, David K. Fork, Joel A. Kubby, Philip D. Floyd
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Patent number: 6116718Abstract: A print head is disclosed for use in a marking apparatus in which a propellant stream is passed through a channel and directed toward a substrate. Marking material, such as ink, toner, etc., is controllably introduced into the propellant stream and imparted with sufficient kinetic energy thereby to be made incident upon a substrate. A multiplicity of channels for directing the propellant and marking material allow for high throughput, high resolution marking. Multiple marking materials may be introduced into the channel and mixed therein prior to being made incident on the substrate, or mixed or superimposed on the substrate without registration.Type: GrantFiled: September 30, 1998Date of Patent: September 12, 2000Assignee: Xerox CorporationInventors: Eric Peeters, Jaan Noolandi, Raj B. Apte, Philip D. Floyd, Meng H. Lean, Armin R. Volkel
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Patent number: 6091197Abstract: A full-color, tunable organic light emitting diode (RCOLED) includes a high-reflection tunable membrane and a high-reflection dielectric mirror that form a resonant cavity. A white light OLED is located in the resonant cavity. The high-reflection tunable membrane is moved to alter the resonant cavity length, and/or tilted/bowed to change the finesse of the resonant cavity. In this way, color, brightness and color saturation of the emitted light from the RCOLED can be tuned. The RCOLED may also include a microlens structure to improve off-axis viewing.Type: GrantFiled: June 12, 1998Date of Patent: July 18, 2000Assignee: Xerox CorporationInventors: Decai Sun, Raj B. Apte
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Patent number: 6051827Abstract: A pixel circuit construction for image sensing includes a photosensor, an amplifier, a selector switch and, and a reset switch. The amplifier may be a single polycrystalline silicon (channel) transistor for high gain. The selector switch may also be a single polycrystalline silicon (channel) transistor for high conductivity. The reset switch may a single amorphous crystalline silicon (channel) transistor for low leakage current. The photosensor and amplifier may be connected to a shared bias line or may be connected to separate bias and drive lines, respectively. The selector and reset switches may be connected to a shared data line or may be connected to separate data and reset lines, respectively. Laser crystallization and rehydrogenation techniques are well suited to obtaining devices described herein. Threshold response is provided.Type: GrantFiled: April 28, 1998Date of Patent: April 18, 2000Assignee: Xerox CorporationInventors: Ping Mei, Andrew J. Moore, Raj B. Apte, Steven E. Ready, Robert A. Street, James B. Boyce
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Patent number: 6031248Abstract: A pixel circuit construction for image sensing includes a photosensor, an amplifier, a selector switch and, and a reset switch. The amplifier may be a single polycrystalline silicon (channel) transistor for high gain. The selector switch may also be a single polycrystalline silicon (channel) transistor for high conductivity. The reset switch may a single amorphous crystalline silicon (channel) transistor for low leakage current. The photosensor and amplifier may be connected to a shared bias line or may be connected to separate bias and drive lines, respectively. The selector and reset switches may be connected to a shared data line or may be connected to separate data and reset lines, respectively. Laser crystallization and rehydrogenation techniques are well suited to obtaining devices described herein.Type: GrantFiled: April 28, 1998Date of Patent: February 29, 2000Assignee: Xerox CorporationInventors: Ping Mei, Andrew J. Moore, Raj B. Apte, Steven E. Ready, Robert A. Street, James B. Boyce
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Patent number: 6005238Abstract: A pixel circuit construction for image sensing includes a photosensor, an amplifier, a selector switch and, and a reset switch. The amplifier may be a single polycrystalline silicon (channel) transistor for high gain. The selector switch may also be a single polycrystalline silicon (channel) transistor for high conductivity. The reset switch may a single amorphous crystalline silicon (channel) transistor for low leakage current. The photosensor and amplifier may be connected to a shared bias line or may be connected to separate bias and drive lines, respectively. The selector and reset switches may be connected to a shared data line or may be connected to separate data and reset lines, respectively. Laser crystallization and rehydrogenation techniques are well suited to obtaining devices described herein. Linearization of output response is provided.Type: GrantFiled: April 28, 1998Date of Patent: December 21, 1999Assignee: Xerox CorporationInventors: Ping Mei, Andrew J. Moore, Raj B. Apte, Steven E. Ready, Robert A. Street, James B. Boyce
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Patent number: 5981959Abstract: A pixelized scintillation layer is taught in which high aspect ratio columns of scintillation material are formed. The columns may be sized and spaced to correspond to the sizing and spacing of an underlying sensor array, or they may be sized such that there is plurality of columns for each pixel. A method for forming the pixelized scintillation layer includes the step of forming openings such as wells, vias, or channels in a body, for example by etching a thick photoresist, ion beam etching, anodic etching, etc., and the step of filling the openings with scintillation material. A completed image sensing apparatus is also taught.Type: GrantFiled: December 5, 1997Date of Patent: November 9, 1999Assignee: Xerox CorporationInventor: Raj B. Apte
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Patent number: 5941501Abstract: A bistable valve useful for paper handling applications is disclosed. The valve can be batch fabricated in two dimensional valve arrays, with each valve in the array being controlled by passive matrix addressing. Typically, each valve includes a valve housing an electrically conductive movable element such as cantilever beam, diaphragm or film. Valve action is provided by use of housing embedded switching electrodes for moving the movable element between an aperture blocking position and an aperture open position. To reduce unswitched movement when the switching electrode bias is reduced or not present, electrostatic or mechanical catches can be used.Type: GrantFiled: September 6, 1996Date of Patent: August 24, 1999Assignee: Xerox CorporationInventors: David K. Biegelsen, Patrick C. P. Cheung, Andrew A. Berlin, Warren B. Jackson, Lars-Erik Swartz, Raj B. Apte, Richard H. Bruce