Patents by Inventor Timothy D. Stowe
Timothy D. Stowe 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: 11479850Abstract: A system and method are provided for implementing a unique scheme by which to execute digital vapor phase patterning on metals, semiconductor substrates and other surfaces using a proposed variable data digital lithographic image forming architecture or technique. For certain substrate printing and manufacturing applications, including some printed electronics applications, the disclosed schemes implement techniques to digitally pattern metal layers with bulk material properties in a manner that is aligned with underlying layers on the fly. The disclosed digital printing process may pattern a release oil on a substrate in support of a metal deposition process. Changeable patterning is implemented with an ability to modify the alignment of the patterns on-the-fly. The release layer on a drum is laser patterned in order that the patterned release layer is transferred to the substrate, or the patterning of the release layer is accomplished directly on the substrate.Type: GrantFiled: March 30, 2020Date of Patent: October 25, 2022Assignee: Palo Alto Research Center IncorporatedInventors: Janos Veres, Timothy D. Stowe, Gregory Whiting
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Patent number: 11465401Abstract: An ejector device that includes one or more ejectors comprises an ejector layer that spans at least one hollow area. The ejector layer has a first surface and an opposing second surface arranged to receive a viscous material with viscosity between 20 and 50,000 centipoise. The ejector layer includes a radiation absorber material configured to thermally expand without phase transition in response to heating by activation radiation transmitted to the first surface. Thermal expansion of the ejector layer causes displacement of the ejector layer and ejection of the material from the second surface of the ejector layer.Type: GrantFiled: April 19, 2021Date of Patent: October 11, 2022Assignee: Palo Alto Research Center IncoporatedInventors: David K. Biegelsen, Timothy D. Stowe, Mandana Veiseh
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Publication number: 20210237423Abstract: An ejector device that includes one or more ejectors comprises an ejector layer that spans at least one hollow area. The ejector layer has a first surface and an opposing second surface arranged to receive a viscous material with viscosity between 20 and 50,000 centipoise. The ejector layer includes a radiation absorber material configured to thermally expand without phase transition in response to heating by activation radiation transmitted to the first surface. Thermal expansion of the ejector layer causes displacement of the ejector layer and ejection of the material from the second surface of the ejector layer.Type: ApplicationFiled: April 19, 2021Publication date: August 5, 2021Inventors: David K. Biegelsen, Timothy D. Stowe, Mandana Veiseh
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Patent number: 10981374Abstract: An ejector device that includes one or more ejectors comprises an ejector layer that spans at least one hollow area. The ejector layer has a first surface and an opposing second surface arranged to receive a viscous material with viscosity between 20 and 50,000 centipoise. The ejector layer includes a radiation absorber material configured to thermally expand without phase transition in response to heating by activation radiation transmitted to the first surface. Thermal expansion of the ejector layer causes displacement of the ejector layer and ejection of the material from the second surface of the ejector layer.Type: GrantFiled: July 29, 2019Date of Patent: April 20, 2021Assignee: Palo Alto Research Center IncorporatedInventors: David K. Biegelsen, Timothy D. Stowe, Mandana Veiseh
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Publication number: 20200283889Abstract: A system and method are provided for implementing a unique scheme by which to execute digital vapor phase patterning on metals, semiconductor substrates and other surfaces using a proposed variable data digital lithographic image forming architecture or technique. For certain substrate printing and manufacturing applications, including some printed electronics applications, the disclosed schemes implement techniques to digitally pattern metal layers with bulk material properties in a manner that is aligned with underlying layers on the fly. The disclosed digital printing process may pattern a release oil on a substrate in support of a metal deposition process. Changeable patterning is implemented with an ability to modify the alignment of the patterns on-the-fly. The release layer on a drum is laser patterned in order that the patterned release layer is transferred to the substrate, or the patterning of the release layer is accomplished directly on the substrate.Type: ApplicationFiled: March 30, 2020Publication date: September 10, 2020Inventors: Janos VERES, Timothy D. STOWE, Gregory WHITING
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Patent number: 10589515Abstract: A variable lithographic cleaning apparatus, system and method works on the principle that dust and ink residue may be transferred from a lower surface energy reimageable conformable blanket surface to a higher surface energy surface low durometer cleaning member, such as the tacky roller, and then to an even higher surface energy cleaning member, such as the hard roller, which is hard and robust to scratching. The hard roller can then been scrubbed clean by an ink flushing device having a third cleaning member, such as a melamine sponge, wetted with a cleaning solution with the hard roller dried upon each rotation.Type: GrantFiled: August 23, 2016Date of Patent: March 17, 2020Assignee: Palo Alto Research Center IncorporatedInventors: Timothy D. Stowe, Gregory B. Anderson, Martin J. Sheridan
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Publication number: 20190351668Abstract: An ejector device that includes one or more ejectors comprises an ejector layer that spans at least one hollow area. The ejector layer has a first surface and an opposing second surface arranged to receive a viscous material with viscosity between 20 and 50,000 centipoise. The ejector layer includes a radiation absorber material configured to thermally expand without phase transition in response to heating by activation radiation transmitted to the first surface. Thermal expansion of the ejector layer causes displacement of the ejector layer and ejection of the material from the second surface of the ejector layer.Type: ApplicationFiled: July 29, 2019Publication date: November 21, 2019Inventors: David K. Biegelsen, Timothy D. Stowe, Mandana Veiseh
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Patent number: 10471752Abstract: A chamber blade system maximizes ink flow at an anilox doctor blade by including a heating element adjacent the doctor blade to heat ink adjacent the blade. The heating element may be a heat strip next to an anilox doctor blade that heats the ink adjacent the doctor blade and temporarily reduces the ink viscosity to improve the flow of ink in the vicinity of the blade. Doctoring blades with a ceramic tip coating may be configured to allow a small amount of controlled ink flow through that can wet the lands thereby reducing the hydrodynamic back pressures and friction when trying to force the ink into anilox cells.Type: GrantFiled: August 8, 2016Date of Patent: November 12, 2019Assignee: Palo Alto Research Center IncorporatedInventors: Timothy D. Stowe, Gregory B. Anderson
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Patent number: 10466455Abstract: High resolution printing systems that utilize high power laser diode bars and digital mirror devices (DMD) require side-by-side stacking of illumination modules to stitching of the image from each module to form a longer total image width. An inline illumination optical system having a refractive prism and Total Internal Reflection (TIR) prism pair with an air gap along with a light guide transporting light beams at a compound angle to the prism pair eliminates the need for any axial rotation of the laser and light guide, and enables side-by-side module stacking. The illumination optical system includes an illumination module having a light source, the light guide, a DMD array and a Refractive TIR (RTIR) prism. The system also includes a DMD housing containing the DMD array and having a width within which the illumination module is confined to allow side-by-side stacking.Type: GrantFiled: June 27, 2018Date of Patent: November 5, 2019Assignee: Palo Alto Research Center IncorporatedInventors: Patrick Y. Maeda, Timothy D. Stowe
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Patent number: 10363731Abstract: An ejector device that includes one or more ejectors comprises an ejector layer that spans at least one hollow area. The ejector layer has a first surface and an opposing second surface arranged to receive a viscous material with viscosity between 20 and 50,000 centipoise. The ejector layer includes a radiation absorber material configured to thermally expand without phase transition in response to heating by activation radiation transmitted to the first surface. Thermal expansion of the ejector layer causes displacement of the ejector layer and ejection of the material from the second surface of the ejector layer.Type: GrantFiled: December 18, 2014Date of Patent: July 30, 2019Assignee: Palo Alto Research Center IncorporatedInventors: David K. Biegelsen, Timothy D. Stowe, Mandana Veiseh
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Patent number: 10328688Abstract: A dampening fluid useful in offset ink printing applications contains water and a surfactant whose structure can be altered. The alteration in structure aids in reducing accumulation of the surfactant on the surface of an imaging member. The surfactant can be decomposed, switched between cis-trans states, or polymerizable with ink that is subsequently placed on the surface.Type: GrantFiled: April 25, 2017Date of Patent: June 25, 2019Assignees: Xerox Corporation, Palo Alto Research CorporationInventors: Naveen Chopra, Peter Gordon Odell, Steven E. Ready, Eric Peeters, Timothy D. Stowe, Ashish Pattekar, David K. Biegelsen
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Patent number: 10166801Abstract: A system is provided for transferring a marking material from a ribbon to a substrate. The system includes a ribbon take-up device; a ribbon supply source that supplies the ribbon to the ribbon take-up device such that the ribbon is moved in a process direction; a pressure roll located between the ribbon supply source and the ribbon take-up device in the process direction, the pressure roll being configured to apply pressure to the ribbon at a pressure location when the ribbon is positioned between the pressure roll and the substrate; and a laser beam source that directs a laser beam or laser light through the pressure roll and onto the ribbon at the pressure location such that a marking portion of the ribbon is heated by the laser beams and transferred to the substrate.Type: GrantFiled: August 30, 2017Date of Patent: January 1, 2019Assignee: PALO ALTO RESEARCH CENTER INCORPORATEDInventor: Timothy D. Stowe
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Publication number: 20180307013Abstract: High resolution printing systems that utilize high power laser diode bars and digital mirror devices (DMD) require side-by-side stacking of illumination modules to stitching of the image from each module to form a longer total image width. An inline illumination optical system having a refractive prism and Total Internal Reflection (TIR) prism pair with an air gap along with a light guide transporting light beams at a compound angle to the prism pair eliminates the need for any axial rotation of the laser and light guide, and enables side-by-side module stacking. The illumination optical system includes an illumination module having a light source, the light guide, a DMD array and a Refractive TIR (RTIR) prism. The system also includes a DMD housing containing the DMD array and having a width within which the illumination module is confined to allow side-by-side stacking.Type: ApplicationFiled: June 27, 2018Publication date: October 25, 2018Inventors: Patrick Y. MAEDA, Timothy D. STOWE
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Patent number: 10042145Abstract: High resolution printing systems that utilize high power laser diode bars and digital mirror devices (DMD) require side-by-side stacking of illumination modules to stitching of the image from each module to form a longer total image width. An inline illumination optical system having a refractive prism and Total Internal Reflection (TIR) prism pair with an air gap along with a light guide transporting light beams at a compound angle to the prism pair eliminates the need for any axial rotation of the laser and light guide, and enables side-by-side module stacking. The illumination optical system includes an illumination module having a light source, the light guide, a DMD array and a Refractive TIR (RTIR) prism. The system also includes a DMD housing containing the DMD array and having a width within which the illumination module is confined to allow side-by-side stacking.Type: GrantFiled: January 6, 2017Date of Patent: August 7, 2018Assignee: Palo Alto Research Center IncorporatedInventors: Patrick Y. Maeda, Timothy D. Stowe
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Publication number: 20180196242Abstract: High resolution printing systems that utilize high power laser diode bars and digital mirror devices (DMD) require side-by-side stacking of illumination modules to stitching of the image from each module to form a longer total image width. An inline illumination optical system having a refractive prism and Total Internal Reflection (TIR) prism pair with an air gap along with a light guide transporting light beams at a compound angle to the prism pair eliminates the need for any axial rotation of the laser and light guide, and enables side-by-side module stacking. The illumination optical system includes an illumination module having a light source, the light guide, a DMD array and a Refractive TIR (RTIR) prism. The system also includes a DMD housing containing the DMD array and having a width within which the illumination module is confined to allow side-by-side stacking.Type: ApplicationFiled: January 6, 2017Publication date: July 12, 2018Inventors: Patrick Y. MAEDA, Timothy D. STOWE
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Patent number: 10000052Abstract: Disclosed herein are methods for an ink-based digital printing system, comprising providing an imaging member a reimageable surface layer disposed on a structural mounting layer, the reimageable surface layer comprising a fluorosilicone elastomer and an infrared-absorbing filler comprising carbon black, and a plurality of surface defects on the reimageable surface layer, wherein the surface defects comprises carbon black exposed through the fluorosilicone elastomer of the reimageable surface layer. The method also comprises applying a coating of rejuvenating oil comprising an amino-functional organopolysiloxane to the reimageable surface layer, whereby at least a portion of the plurality of surface defects are coated by the amino-functional organopolysiloxane, thereby rejuvenating the imaging member.Type: GrantFiled: July 21, 2017Date of Patent: June 19, 2018Assignees: XEROX CORPORATION, PALO ALTO RESEARCH CENTER INCORPORATEDInventors: Timothy D. Stowe, Gregory B. Anderson, Santokh S. Badesha, Mandakini Kanungo
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Patent number: 9956801Abstract: An imaging member surface contains a swellable elastomer doped with a release oil. This aids in complete transfer of ink to a receiving substrate when a thin film of release oil forms upon the surface during application of pressure at the nip.Type: GrantFiled: August 31, 2012Date of Patent: May 1, 2018Assignees: Xerox Corporation, Palo Alto Research Center IncorporatedInventors: Bing Hsieh, Timothy D. Stowe, Santokh S. Badesha, Chu-heng Liu, Mandakini Kanungo, Jorge A. Alvarez, Patrick J. Howe, Matthew M. Kelly, David J. Gervasi, Palghat Srinivas Ramesh
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Publication number: 20180074398Abstract: An ink composition useful for digital offset printing applications includes a colorant and a high viscosity thickening agent. A process for variable data lithographic printing includes applying a dampening fluid to an imaging member surface; forming a latent image by evaporating the dampening fluid from selective locations on the imaging member surface to form hydrophobic non-image areas and hydrophilic image areas; developing the latent image by applying an ink composition comprising an ink component to the hydrophilic image areas, the ink composition comprising a high viscosity thickening agent to raise the viscosity of the composition from about 1.05 to about 2 times higher while maintaining excellent transfer to a substrate at low temperatures.Type: ApplicationFiled: September 12, 2016Publication date: March 15, 2018Inventors: James D. MAYO, Aurelian Valeriu MAGDALINIS, Timothy D. STOWE, C. Geoffrey ALLEN, Biby E. ABRAHAM, Marcel P. BRETON, Jonathan Siu-Chung LEE
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Publication number: 20180056645Abstract: A variable lithographic cleaning apparatus, system and method works on the principle that dust and ink residue may be transferred from a lower surface energy reimageable conformable blanket surface to a higher surface energy surface low durometer cleaning member, such as the tacky roller, and then to an even higher surface energy cleaning member, such as the hard roller, which is hard and robust to scratching. The hard roller can then been scrubbed clean by an ink flushing device having a third cleaning member, such as a melamine sponge, wetted with a cleaning solution with the hard roller dried upon each rotation.Type: ApplicationFiled: August 23, 2016Publication date: March 1, 2018Inventors: Timothy D. STOWE, Gregory B. ANDERSON, Martin J. SHERIDAN
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Publication number: 20180050532Abstract: Disclosed herein are methods for an ink-based digital printing system, comprising providing an imaging member a reimageable surface layer disposed on a structural mounting layer, the reimageable surface layer comprising a fluorosilicone elastomer and an infrared-absorbing filler comprising carbon black, and a plurality of surface defects on the reimageable surface layer, wherein the surface defects comprises carbon black exposed through the fluorosilicone elastomer of the reimageable surface layer. The method also comprises applying a coating of rejuvenating oil comprising an amino-functional organopolysiloxane to the reimageable surface layer, whereby at least a portion of the plurality of surface defects are coated by the amino-functional organopolysiloxane, thereby rejuvenating the imaging member.Type: ApplicationFiled: July 21, 2017Publication date: February 22, 2018Applicants: XEROX CORPORATION, PALO ALTO RESEARCH CENTER INCORPORATEDInventors: Timothy D. Stowe, Gregory B. Anderson, Santokh S. Badesha, Mandakini Kanungo