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    MODELING OF LIQUID-GAS MENISCUS DYNAMICS FOR ARBITRARY NOZZLE GEOMETRIES
    5.
    发明公开
    MODELING OF LIQUID-GAS MENISCUS DYNAMICS FOR ARBITRARY NOZZLE GEOMETRIES 审中-公开

    公开(公告)号：US20240211655A1

    公开(公告)日：2024-06-27

    申请号：US18086348

    申请日：2022-12-21

    申请人： Palo Alto Research Center Incorporated

    发明人： Søren Taverniers ,  Adrian Lew ,  Svyatoslav Korneev ,  Christoforos Somarakis ,  Morad Behandish

    IPC分类号： G06F30/23

    CPC分类号： G06F30/23 ,  G06F2113/10

    摘要： Techniques for determining a damping rate of unforced oscillations of a meniscus are disclosed. An example method includes receiving input describing a shape of a container, physical parameters of a liquid inside the container, and an equilibrium shape of the meniscus. The method also includes generating a mesh conforming to the shape of the container and generating a discrete version of a continuous eigenvalue problem based on this mesh. The method also includes computing, at appropriate mesh nodes, values for pressure, velocity components, and meniscus surface deformation corresponding to a suitable number of least-damped late-time oscillation modes of the liquid and computing an angular frequency and damping rate of these least-damped late-time oscillation modes from the discrete version of the continuous eigenvalue problem. The method also includes identifying the mode that has the lowest damping rate and computing a liquid relaxation time by inverting the damping rate of the identified mode.

    ENERGY DISSIPATIVE NOZZLES FOR DROP-ON-DEMAND PRINTING AND METHODS THEREOF
    7.
    发明申请
    ENERGY DISSIPATIVE NOZZLES FOR DROP-ON-DEMAND PRINTING AND METHODS THEREOF 有权

    公开(公告)号：US20220266512A1

    公开(公告)日：2022-08-25

    申请号：US17185814

    申请日：2021-02-25

    申请人： PALO ALTO RESEARCH CENTER INCORPORATED

    发明人： Christoforos Somarakis ,  Svyatoslav Korneev ,  Saigopal Nelaturi ,  Adrian Lew

    IPC分类号： B29C64/209 ,  B29C64/112 ,  B33Y10/00

    摘要： A nozzle for a printing system is disclosed. The nozzle includes a tank in communication with a source of printing material. The nozzle also includes a constricted dissipative section in communication with the tank, which may include an elongated internal channel. The nozzle may also include a shaping tip in communication with the constricted dissipative section may include an exit orifice. The constricted dissipative section may be axisymmetric and may include at least three internal channels not in communication with one another. Also disclosed is an array of nozzles for a printing system including a plurality of nozzles, with each nozzle including a tank in communication with a source of printing material, a constricted dissipative section in communication with the tank and configured to obstruct fluid flow and having an elongated internal channel, and a shaping tip in communication with the constricted dissipative section may include an exit orifice.

    DROP-ON-DEMAND PRINTER HAVING OPTIMIZED NOZZLE DESIGN
    8.
    发明申请
    DROP-ON-DEMAND PRINTER HAVING OPTIMIZED NOZZLE DESIGN 有权

    公开(公告)号：US20220266513A1

    公开(公告)日：2022-08-25

    申请号：US17185840

    申请日：2021-02-25

    申请人： PALO ALTO RESEARCH CENTER INCORPORATED

    发明人： Christoforos Somarakis ,  Svyatoslav Korneev ,  Saigopal Nelaturi ,  Adrian Lew

    IPC分类号： B29C64/209 ,  B33Y30/00 ,  B22F12/53

    摘要： A drop-on-demand (DOD) printer is disclosed having an ejector which may include a nozzle, the nozzle including a tank in communication with a source of printing material, a constricted dissipative section in communication with the tank, which may include an elongated internal channel, and a shaping tip in communication with the constricted dissipative section which can include an exit orifice. The (DOD) printer also includes a power source configured to supply one or more pulses of power to the ejector, which causes one or more drops of the printing material to be jetted out of the nozzle. The DOD printer may include a constricted dissipative section configured to obstruct fluid flow that is cylindrical or axisymmetric and having a diameter less than a diameter of the tank and less than a diameter of the shaping tip. The DOD printer may include a nozzle or an array of nozzles.

    Energy dissipative nozzles for drop-on-demand printing and methods thereof
    9.
    发明授权
    Energy dissipative nozzles for drop-on-demand printing and methods thereof 有权

    公开(公告)号：US12042991B2

    公开(公告)日：2024-07-23

    申请号：US17185814

    申请日：2021-02-25

    申请人： XEROX CORPORATION

    发明人： Christoforos Somarakis ,  Svyatoslav Korneev ,  Saigopal Nelaturi ,  Adrian Lew

    IPC分类号： B29C64/20 ,  B22D23/00 ,  B22F12/53 ,  B29C64/112 ,  B29C64/209 ,  B33Y30/00

    CPC分类号： B29C64/209 ,  B22D23/003 ,  B22F12/53 ,  B29C64/112 ,  B33Y30/00

    摘要： A nozzle for a printing system is disclosed. The nozzle includes a tank in communication with a source of printing material. The nozzle also includes a constricted dissipative section in communication with the tank, which may include an elongated internal channel. The nozzle may also include a shaping tip in communication with the constricted dissipative section may include an exit orifice. The constricted dissipative section may be axisymmetric and may include at least three internal channels not in communication with one another. Also disclosed is an array of nozzles for a printing system including a plurality of nozzles, with each nozzle including a tank in communication with a source of printing material, a constricted dissipative section in communication with the tank and configured to obstruct fluid flow and having an elongated internal channel, and a shaping tip in communication with the constricted dissipative section may include an exit orifice.