Patents by Inventor Terrance Lee Stephens
Terrance Lee Stephens 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: 9039141Abstract: A fluidic structure has a first chamber having a connection to a fluid reservoir and a connection to an array of apertures, the chamber forming a flow path between the fluid reservoir and the array of apertures, a second chamber having a connection to at least one vent connected to an atmosphere external to the fluidic structure, and at least one path between the first chamber and the second chamber.Type: GrantFiled: May 10, 2012Date of Patent: May 26, 2015Assignee: XEROX CORPORATIONInventors: Terrance Lee Stephens, Jonathan Robert Brick
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Patent number: 9016816Abstract: A method for operating an inkjet printer includes identifying a pattern of ink drops ejected from an inkjet with reference to image data for a printed image, identifying a waveform component for an electrical signal operating the inkjet to eject an ink drop in the pattern of ink drops with reference to at least a portion of the image data, and generating the electrical signal with the identified waveform component to eject the ink drop in the pattern of ink drops at a first velocity onto a first location of an image receiving surface.Type: GrantFiled: June 10, 2013Date of Patent: April 28, 2015Assignee: Xerox CorporationInventors: Takahiro Peter Terayama, Douglas Dean Darling, Russell J. Watt, Terrance Lee Stephens, James Dudley Padgett, Daniel Mark Platt, Brian Edward Williams, Monica Louise Maestas, Kenneth Eugene Strohmeyer, Jr., David L. Knierim, John Milton Brookfield
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Publication number: 20140362135Abstract: A method for operating an inkjet printer includes identifying a pattern of ink drops ejected from an inkjet with reference to image data for a printed image, identifying a waveform component for an electrical signal operating the inkjet to eject an ink drop in the pattern of ink drops with reference to at least a portion of the image data, and generating the electrical signal with the identified waveform component to eject the ink drop in the pattern of ink drops at a first velocity onto a first location of an image receiving surface.Type: ApplicationFiled: June 10, 2013Publication date: December 11, 2014Inventors: Takahiro Peter Terayama, Douglas Dean Darling, Russell J. Watt, Terrance Lee Stephens, James Dudley Padgett, Daniel Mark Platt, Brian Edward Williams, Monica Louise Maestas, Kenneth Eugene Strohmeyer, JR., David L. Knierem, John Milton Brookfield
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Publication number: 20130300801Abstract: A fluidic structure has a first chamber having a connection to a fluid reservoir and a connection to an array of apertures, the chamber forming a flow path between the fluid reservoir and the array of apertures, a second chamber having a connection to at least one vent connected to an atmosphere external to the fluidic structure, and at least one path between the first chamber and the second chamber.Type: ApplicationFiled: May 10, 2012Publication date: November 14, 2013Applicant: XEROX CORPORATIONInventors: Terrance Lee Stephens, Jonathan Robert Brick
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Patent number: 8439486Abstract: A method of assembly produces a printhead having a polymer aperture plate and outlet plate that are at least 25 mm in length. The method includes bonding the polymer aperture plate to the outlet plate, which is configured with outlets. A laser is aligned with the outlets in the outlet plate to ablate apertures in the polymer aperture plate and the outlet plate is bonded to an inkjet stack to couple the outlets in the outlet plate to pressure chambers in a body plate in the inkjet stack.Type: GrantFiled: June 8, 2012Date of Patent: May 14, 2013Assignee: Xerox CorporationInventors: John R. Andrews, David A. Tence, Terrance Lee Stephens
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Patent number: 8403440Abstract: A drop emitting device that includes a drop generator, a drive signal including a plurality of fire intervals applied to the drop generator, wherein the drive signal includes in each fire interval a bi-polar drop firing waveform or a non-firing waveform.Type: GrantFiled: February 12, 2009Date of Patent: March 26, 2013Assignee: Xerox CorporationInventors: Brian Edward Williams, Terrance Lee Stephens
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Publication number: 20120247659Abstract: A method of assembly produces a printhead having a polymer aperture plate and outlet plate that are at least 25 mm in length. The method includes bonding the polymer aperture plate to the outlet plate, which is configured with outlets. A laser is aligned with the outlets in the outlet plate to ablate apertures in the polymer aperture plate and the outlet plate is bonded to an inkjet stack to couple the outlets in the outlet plate to pressure chambers in a body plate in the inkjet stack.Type: ApplicationFiled: June 8, 2012Publication date: October 4, 2012Applicant: XEROX CORPORATIONInventors: John R. Andrews, David A. Tence, Terrance Lee Stephens
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Patent number: 8240818Abstract: A method forms apertures in a polymer aperture plate configured for use in a piezoelectric print head. The method includes bonding a polymer aperture plate to an outlet plate configured with outlets, and aligning a laser with the outlets in the outlet plate to ablate apertures in the polymer aperture plate that are aligned with the outlets.Type: GrantFiled: December 17, 2009Date of Patent: August 14, 2012Assignee: Xerox CorporationInventors: John R. Andrews, David A. Tence, Terrance Lee Stephens
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Patent number: 8205970Abstract: A method for bonding a polymer layer to an outlet plate for an inkjet print head has been developed that enables the polymer layer to be attached to the outlet plate with little or no bowing of the polymer layer. The method includes aligning recesses in a bonding plate with channels in an outlet plate, interposing a polymer layer between the bonding plate and the outlet plate, and pressing the bonding plate against the polymer layer to bond the polymer layer to the outlet plate.Type: GrantFiled: December 17, 2009Date of Patent: June 26, 2012Assignee: Xerox CorporationInventors: Pinyen Lin, John R. Andrews, Mark S. Maynard, Terrance Lee Stephens, Gregory Lee Friedman
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Patent number: 8177338Abstract: An inkjet ejector has been developed that enables the ejector to be operated at a frequency greater than 80 kHz. The inkjet ejector includes a body layer in which a pressure chamber is configured with an outlet having a volume that is less than a predetermined volumetric threshold, a flexible diaphragm plate disposed on the pressure chamber to form a wall of the pressure chamber, a piezoelectric transducer having a bottom surface attached to the diaphragm plate, and an inlet layer in which an inlet channel is configured to connect the pressure chamber to a source of liquid ink, a cross-sectional area of the inlet channel at the pressure chamber divided by a length of the inlet channel being greater than a predetermined linear threshold.Type: GrantFiled: December 10, 2009Date of Patent: May 15, 2012Assignee: Xerox CorporationInventors: John R. Andrews, Terrance Lee Stephens, Gerald A. Domoto, Bradley J. Gerner
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Publication number: 20110148993Abstract: A method forms apertures in a polymer aperture plate configured for use in a piezoelectric print head. The method includes bonding a polymer aperture plate to an outlet plate configured with outlets, and aligning a laser with the outlets in the outlet plate to ablate apertures in the polymer aperture plate that are aligned with the outlets.Type: ApplicationFiled: December 17, 2009Publication date: June 23, 2011Applicant: XEROX CORPORATIONInventors: John R. Andrews, David A. Tence, Terrance Lee Stephens
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Publication number: 20110148994Abstract: A method for bonding a polymer layer to an outlet plate for an inkjet print head has been developed that enables the polymer layer to be attached to the outlet plate with little or no bowing of the polymer layer. The method includes aligning recesses in a bonding plate with channels in an outlet plate, interposing a polymer layer between the bonding plate and the outlet plate, and pressing the bonding plate against the polymer layer to bond the polymer layer to the outlet plate.Type: ApplicationFiled: December 17, 2009Publication date: June 23, 2011Applicant: XEROX CORPORATIONInventors: Pinyen Lin, John R. Andrews, Mark S. Maynard, Terrance Lee Stephens, Gregory Lee Friedman
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Publication number: 20110141202Abstract: An inkjet ejector has been developed that enables the ejector to be operated at a frequency greater than 80 kHz. The inkjet ejector includes a body layer in which a pressure chamber is configured with an outlet having a volume that is less than a predetermined volumetric threshold, a flexible diaphragm plate disposed on the pressure chamber to form a wall of the pressure chamber, a piezoelectric transducer having a bottom surface attached to the diaphragm plate, and an inlet layer in which an inlet channel is configured to connect the pressure chamber to a source of liquid ink, a cross-sectional area of the inlet channel at the pressure chamber divided by a length of the inlet channel being greater than a predetermined linear threshold.Type: ApplicationFiled: December 10, 2009Publication date: June 16, 2011Applicant: XEROX CORPORATIONInventors: John R. Andrews, Terrance Lee Stephens, Gerald A. Domoto, Bradley J. Gerner
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Patent number: 7891798Abstract: A method for assembling a micro-fluidic device better preserves the integrity of a filter in a filter layer and simplifies the bonding of the filter layer to the channel layers on each side of the filter layer. The method includes aligning a polymer layer having a plurality of filter elements and a plurality of fluid passages arranged between the filter elements between two substrates of a micro-fluidic device, and bonding the polymer layer between the two substrates to seal an area between the filter elements and the fluid passages to enable fluid flow through the filter elements to be segregated from fluid flow through the fluid passages.Type: GrantFiled: August 4, 2008Date of Patent: February 22, 2011Assignee: Xerox CorporationInventors: John Richard Andrews, Terrance Lee Stephens
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Patent number: 7857432Abstract: A drop generator includes a pressure chamber and a flexible diaphragm plate disposed on the chamber and forming a wall of the pressure chamber. A piezoelectric transducer having a bottom surface is attached to the diaphragm plate. The diaphragm plate includes a recess that forms a perimeter around the bottom surface of the transducer that partially underlies at least one edge of the bottom surface. An inlet channel is connected to the pressure chamber and configured to direct ink to the pressure chamber from a manifold. An outlet channel is connected to the pressure chamber to receive ink from the pressure chamber and has a channel axis that is perpendicular to the diaphragm plate. The outlet channel includes a first outlet channel section and a second outlet channel section. The first outlet channel section includes a plurality of subsections having alternating diameters. The second outlet channel section includes an aperture disposed at an end thereof.Type: GrantFiled: February 24, 2009Date of Patent: December 28, 2010Assignee: Xerox CorporationInventors: Terrance Lee Stephens, Brian Edward Williams, John Milton Brookfield, James Dudley Padgett
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Publication number: 20100214374Abstract: A drop generator includes a pressure chamber and a flexible diaphragm plate disposed on the chamber and forming a wall of the pressure chamber. A piezoelectric transducer having a bottom surface is attached to the diaphragm plate. The diaphragm plate includes a recess that forms a perimeter around the bottom surface of the transducer that partially underlies at least one edge of the bottom surface. An inlet channel is connected to the pressure chamber and configured to direct ink to the pressure chamber from a manifold. An outlet channel is connected to the pressure chamber to receive ink from the pressure chamber and has a channel axis that is perpendicular to the diaphragm plate. The outlet channel includes a first outlet channel section and a second outlet channel section. The first outlet channel section includes a plurality of subsections having alternating diameters. The second outlet channel section includes an aperture disposed at an end thereof.Type: ApplicationFiled: February 24, 2009Publication date: August 26, 2010Applicant: XEROX CORPORATIONInventors: Terrance Lee Stephens, Brian Edward Williams, John Milton Brookfield, James Dudley Padgett
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Publication number: 20100201725Abstract: A drop emitting device that includes a drop generator, a drive signal including a plurality of fire intervals applied to the drop generator, wherein the drive signal includes in each fire interval a bi-polar drop firing waveform or a non-firing waveform.Type: ApplicationFiled: February 12, 2009Publication date: August 12, 2010Applicant: Xerox CorporationInventors: Brian Edward Williams, Terrance Lee Stephens
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Publication number: 20100025322Abstract: A method for assembling a micro-fluidic device better preserves the integrity of a filter in a filter layer and simplifies the bonding of the filter layer to the channel layers on each side of the filter layer. The method includes aligning a polymer layer having a plurality of filter elements and a plurality of fluid passages arranged between the filter elements between two substrates of a micro-fluidic device, and bonding the polymer layer between the two substrates to seal an area between the filter elements and the fluid passages to enable fluid flow through the filter elements to be segregated from fluid flow through the fluid passages.Type: ApplicationFiled: August 4, 2008Publication date: February 4, 2010Applicant: XEROX CORPORATIONInventors: John Richard Andrews, Terrance Lee Stephens