Abstract: A closed loop system for separating materials of differing melting points includes an ultrasonic bath including a solution configured to supply thermal energy and cavitation to the materials of differing melting points, a solution reservoir configured to adjust levels of the solution in the ultrasonic bath, and a filter configured to remove particles of one of the materials of differing melting points from the solution.

Abstract: A printing device is provided, wherein the printing device is configured to print a printing fluid onto a printing medium. The printing device includes a printing fluid reservoir configured to hold a volume of the printing fluid, a print head assembly configured to transfer the printing fluid to the printing medium, wherein the print head assembly is fluidically connected to the printing fluid reservoir, and a printing fluid detector configured to detect a characteristic of the printing fluid. The printing fluid detector includes a first electrode and a second electrode configured to be in contact with the printing fluid, wherein at least one of the first electrode and the second electrode includes an electrically conductive coating disposed over an electrically conductive substrate.

Abstract: A printing device is provided, wherein the printing device includes a printing fluid reservoir configured to hold a volume of a printing fluid, a print head assembly configured to transfer the printing fluid to a printing medium, a conduit fluidically connecting the printing fluid reservoir and the print head assembly, and a printing fluid detector. The printing fluid detector includes first and second electrodes configured to be in contact with the printing fluid, and is configured to distinguish printing fluid from printing fluid froth by taking an impedance measurement across the first and second electrodes and comparing the impedance measurement to a froth threshold impedance value that is calibrated to a measured printing fluid temperature.

Abstract: A fluid supply is provided, which includes a body defining a storage space configured to contain a fluid, a first electrode and a second electrode contained within the storage space and configured to be in direct contact with the fluid, wherein the first electrode and second electrode are configured to be connected to external power supply circuitry for applying an alternating signal across the first and second electrodes, and a first electrical contact in electrical communication with the first electrode and a second electrical contact in electrical communication with the second electrode. The first electrical contact and second electrical contact are to be connected to the external power supply circuitry and to detector circuitry for determining a measured impedance value of the fluid.

Abstract: A printing device is provided, which is configured to print a printing fluid onto a printing medium. The printing device includes a printing fluid reservoir configured to hold a volume of the printing fluid, a print head assembly configured to transfer the printing fluid to the printing medium, a conduit fluidically connecting the printing fluid reservoir to the print head assembly, and a printing fluid detector associated with the conduit. The printing fluid detector includes a first electrode and a second electrode coupled with the conduit and configured to be in contact with printing fluid in the conduit, a power supply configured to apply an alternating supply signal to the first electrode, and detector circuitry configured to detect a measured impedance value related to the presence of printing fluid within the conduit by comparing the alternating supply signal with a detected signal that has been modified from the applied signal by an impedance characteristic of the printing fluid.

Abstract: Embodiments of the present invention include methods and apparatus for compensating for variations between different ink or toner characteristics, and for variations between sensors, by characterizing the ink or toner and storing one or more static threshold level on printer consumable memory devices during manufacture of the printer consumables. When installed in a printer, a dynamic threshold may be determined based on the static threshold level; the dynamic threshold accounting for variations between sensors and printers. The dynamic threshold may further be stored on the printer consumable memory device.

Abstract: A fluid ejection cartridge includes an ejector head having at least one nozzle and a fluid reservoir containing an ejectable fluid, fluidically coupled with the at least one nozzle. The fluid ejection cartridge has a tape that includes a thermoplastic polymer film in contact with and releasably bonded to the nozzles.

Abstract: A fluid ejection cartridge includes an ejector head having at least one nozzle and a fluid reservoir containing an ejectable fluid, fluidically coupled with the at least one nozzle. The fluid ejection cartridge has a tape that includes a thermoplastic polymer film in contact with and releasably bonded to the nozzles.

Abstract: A printer has a print engine with an ink supply chamber connected to the print engine. The supply chamber has an exit aperture to which a suction device is connected. A gas permeable film associated with the aperture separates the chamber from the suction device. The suction device may be a resilient spring member that occasionally is composed during winter carriage reciprocation to maintain suction, or may be a vacuum pump. A porous may support the film.