Molded printhead
    33.
    发明授权

    公开(公告)号:US10029467B2

    公开(公告)日:2018-07-24

    申请号:US14770608

    申请日:2013-09-27

    Abstract: In one example, a printhead includes: a printhead die having a front face along which fluid may be dispensed from the die, the die molded into a monolithic molding having a channel therein through which fluid may pass directly to a back part of the die, the front face of the die exposed outside the molding and the back part of the die covered by the molding except at the channel; an electrical contact exposed outside the molding to connect to circuitry external to the printhead; a printed circuit board molded into the molding, the printed circuit board having an exposed front face co-planar with and surrounding the exposed front face of the die and a conductor electrically connected to the contact; and an electrical connection between the die and the printed circuit board conductor fully encapsulated in the molding.

    Complex impedance detection
    35.
    发明授权

    公开(公告)号:US11090929B2

    公开(公告)日:2021-08-17

    申请号:US16092978

    申请日:2016-07-21

    Abstract: A printhead may include a nozzle, a firing chamber fluidly coupled to the nozzle, a printing fluid slot fluidly coupled to the firing chamber, and a sensor to detect a plurality of complex impedance values of a printing fluid at the printhead over a plurality of frequencies and create a printing fluid signature of the printing fluid. A method of determining at least one characteristic of a printing fluid provided to a printhead ma include, with a number of sensors, applying an alternating current at a plurality of frequencies over time to the printing fluid to receive a plurality of complex impedance values and comparing the plurality of complex impedance signals to a number of stored signals.

    METHOD OF PREPARING TEST SAMPLES
    38.
    发明申请

    公开(公告)号:US20190119723A1

    公开(公告)日:2019-04-25

    申请号:US16094360

    申请日:2016-07-22

    Abstract: A method of preparing a sample may include depositing an aqueous solution comprising copies of a primer into a layer of hydrophobic liquid on a substrate with a thermal inkjet device. A sample may include: a substrate; a layer of hydrophobic liquid on the substrate, the layer of hydrophobic liquid comprising a plurality of droplets of aqueous solution distributed in the layer, wherein the plurality of droplets contain: primers; a polymerase enzyme; deoxynucleotide triphosphates (dNTPs); and a target sequence for replication; and a cover, the cover contacting and covering the layer of hydrophobic liquid.

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