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    Methods and systems for creating aerosols
    1.
    发明授权
    Methods and systems for creating aerosols 有权

    公开(公告)号：US12202001B2

    公开(公告)日：2025-01-21

    申请号：US17130420

    申请日：2020-12-22

    Applicant: PALO ALTO RESEARCH CENTER INCORPORATED

    Inventor： David Mathew Johnson ,  Victor Beck

    IPC: B29C64/112 ,  B01J13/00 ,  B05B3/02 ,  B05B9/03 ,  B05B17/04 ,  B33Y30/00 ,  B05B7/00 ,  B05B12/32

    Abstract: An aerosol creation system includes a pair of counter-rotating rollers, a nip between the two rollers, the nip having an upstream side and a downstream side, and a pool of fluid on the upstream side of the nip, the fluid being drawn into the nip through the motion of the rollers, such that on the downstream side the fluid stretches between diverging surfaces of the two rollers and forms filaments that breaks up into droplets. A multi-roller aerosol creation system includes more than two rollers arranged to touch each other in a configuration, wherein areas where the rollers touch form nips, each nip having an upstream side and a downstream side, wherein the downstream side of the nips are positioned within a central space within the configuration of the rollers, and fluid surrounding the circular configuration, wherein an outer region of the circular configuration forms the upstream side of the nips.

    Three dielectric electrohydrodynamic patterning
    3.
    发明授权
    Three dielectric electrohydrodynamic patterning 有权

    公开(公告)号：US11732378B2

    公开(公告)日：2023-08-22

    申请号：US16590902

    申请日：2019-10-02

    Applicant: PALO ALTO RESEARCH CENTER INCORPORATED

    Inventor： Michael Benedict ,  David Mathew Johnson ,  Elif Karatay ,  Eric Weflen ,  Ravi Neelakantan

    IPC: C25D13/04

    CPC classification number: C25D13/04

    Abstract: A system to electrohydrodynamically pattern a material includes a first electrode having a first voltage, a second electrode having a second voltage that is different from the first voltage, one or more materials to be patterned residing between the first electrode and the second electrode, a gap between at least one surface of at least one of the materials to be patterned and one of the first or second electrodes, at least one patterning material in the gap, wherein the patterning material is a material other than air, and at least one filling material filling any remainder of the gap.

    Low dispersion, fast response mixing device
    5.
    发明授权
    Low dispersion, fast response mixing device 有权

    公开(公告)号：US10850236B2

    公开(公告)日：2020-12-01

    申请号：US14840964

    申请日：2015-08-31

    Applicant: PALO ALTO RESEARCH CENTER INCORPORATED

    Inventor： John Steven Paschkewitz ,  David Mathew Johnson

    IPC: B01D61/36 ,  B01F5/04 ,  B01F15/02 ,  B01F3/08 ,  B01F15/04 ,  B01F13/00 ,  B29C64/112 ,  B33Y70/00

    Abstract: A mixing system has a parallel droplet dispenser capable of making droplets of a first working material in the range of 10 nanometers to 10 micrometers, a pump to deliver fluid for the droplets of the first working material and to produce a first emulsion, a compact mixer having low inter-voxel mixing to receive the emulsion and produce a homogenous material, and a dispensing system. A method of dispensing a graded material includes generating droplets of a first working material, the droplets having a size in the range of 10 nanometers to 10 micrometers, adding the droplets of the first working material into a fluid to create a first emulsion, wherein addition of the droplets of the first working material is controlled to create gradient in the emulsion, mixing the first emulsion to create a homogenous, graded mixture, and dispensing the homogenous, graded mixture onto a surface.

    Polymer spray deposition methods and systems
    6.
    发明授权
    Polymer spray deposition methods and systems 有权

    公开(公告)号：US10029416B2

    公开(公告)日：2018-07-24

    申请号：US14166834

    申请日：2014-01-28

    Applicant: Palo Alto Research Center Incorporated

    Inventor： David Mathew Johnson ,  Armin R. Volkel ,  Victor Beck ,  John Steven Paschkewitz

    IPC: B29C67/00 ,  B05B17/04 ,  B29C64/112 ,  B29C64/20 ,  B29K105/00 ,  B29K101/12 ,  B33Y10/00 ,  B33Y30/00

    Abstract: Polymer spray deposition systems and methods are disclosed that can be used with a wide range of thermoplastic materials to produce high resolution objects having the complexity and structural integrity typically only achieved using more traditional manufacturing techniques, like injection molding processes. The polymeric spray deposition systems and methods use a spray generator that stretches the fluid between two diverging surfaces, such as two rollers or between two pistons. The stretched fluid breaks apart into a plurality of droplets and is guided through a delivery system, that can include an optional droplet size selector, and into a multi-nozzle array. The multi-nozzle array is controlled and directs the spray onto a target surface, thereby creating a three-dimensional object. The disclosed polymer spray deposition systems and methods can be used in three-dimensional print heads and printing techniques.

    Continuously Producing Digital Micro-Scale Patterns On A Thin Polymer Film
    7.
    发明申请
    Continuously Producing Digital Micro-Scale Patterns On A Thin Polymer Film 有权
    在薄膜上连续生产数字微尺度图案

    公开(公告)号：US20150021161A1

    公开(公告)日：2015-01-22

    申请号：US13944851

    申请日：2013-07-17

    Applicant: Palo Alto Research Center Incorporated

    Inventor： David Mathew Johnson ,  Armin R. Volkel ,  John Steven Paschkewitz

    IPC: B01J19/08 ,  B01J19/12

    CPC classification number: B01J19/088 ,  B01J19/123 ,  G03F7/0002

    Abstract: A liquid thin film is disposed on a conveyor surface (e.g., a roller or belt) that moves the thin film into a precisely controlled gap (or nip) region in which the liquid thin film is subjected to an electric field that causes the liquid to undergo Electrohydrodynamic (EHD) patterning deformation, whereby portions of the liquid thin film form patterned liquid features having a micro-scale patterned shape. A curing mechanism (e.g., a UV laser) is used to solidify (e.g., in the case of polymer thin films, cross-link) the patterned liquid inside or immediately after exiting the gap region. The patterned structures are either connected by an intervening web as part of a polymer sheet, or separated into discreet micro-scale structures. Nanostructures (e.g., nanotubes or nanowires) disposed in the polymer become vertically oriented during the EHD patterning process. Segmented electrodes and patterned charges are utilized to provide digital patterning control.

    Abstract translation: 液体薄膜设置在将薄膜移动到精确控制的间隙（或辊隙）区域中的输送机表面（例如，辊或带）上，在该区域中液体薄膜经受电场，使得液体 进行电液动力学（EHD）图案变形，由此部分液体薄膜形成具有微尺度图案形状的图案化液体特征。 使用固化机构（例如，UV激光）将图案化液体固化（例如，在聚合物薄膜的情况下，将图案化的液体交联）在离开间隙区域之后或之后。 图案化结构通过作为聚合物片材的一部分的介入纤维网连接，或分离成分立的微尺度结构。 设置在聚合物中的纳米结构（例如，纳米管或纳米线）在EHD图案化工艺期间变得垂直取向。 利用分段电极和图案化电荷来提供数字图案化控制。

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