Abstract: A valve mechanism and a method for preparing an inkjet print cartridge and printer for inactivity is herein disclosed. Pressurized fluid is introduced to a standpipe volume to create a pressure differential that forces ink within the standpipe into an ink reservoir.

Abstract: Systems, methodologies, media, and other embodiments associated with clearing silicate based kogation from heating resistors employed in ink jet printing are described. One exemplary system embodiment includes a silicate kogation clearing logic configured to pulse the heating resistor at a high frequency and low pulse width to heat the resistor surface to a temperature below that required to form an ink bubble and thus below that required to eject a drop of ink. Heating the resistor facilitates breaking bonds between the silicate based kogation and the heating resistor.

Abstract: One embodiment of a method of storing a printhead includes opening a valve to a vent of an ink reservoir, operating a pump in a first direction to pull ink from the ink reservoir through said valve, and pumping the ink pulled from the ink reservoir to an ink supply container.

Abstract: An ink delivery system having at least one off-axis ink supply container and an on-axis printhead assembly. The printhead assembly includes at least one reservoir and a corresponding standpipe separated by a particle filter. At least one tube connects the off-axis ink supply container to the printhead assembly. A first valve is configured to selectively open a flow path between the tube and the reservoir. A second valve is configured to selectively open a flow path between the standpipe and the tube. A method for controlling effects of accumulated air in a printhead assembly. The printhead assembly has at least one ink reservoir and one standpipe separated by a particle filter. The printhead assembly is fluidicly connected to at least one off-axis ink supply container by at least one tube. The method includes drawing air from said printhead assembly through said standpipe into the tube.

Abstract: A valve mechanism and a method for preparing an inkjet print cartridge and printer for inactivity is herein disclosed. Pressurized fluid is introduced to a standpipe volume to create a pressure differential that forces ink within the standpipe into an ink reservoir.

Abstract: An ink delivery system having a fluid supply and a printhead assembly, separate from and in fluid communication with the fluid supply. A primary flow path is configured to facilitate the delivery of fluid from the fluid supply to the printhead assembly, and a return flow path, at least partially separate from the primary flow path, is configured to facilitate the evacuation of fluid from the printhead assembly.

Abstract: One method of ink formulation may include providing a shipping material in a reservoir of a printing mechanism, placing a concentrated ink in communication with the reservoir, and mixing the shipping material and the concentrated ink together to create a print-ready ink.

Abstract: An inkjet printhead and a method for increasing the shelf life thereof are herein disclosed. The inkjet printhead has one or more nozzles for dispensing a colorant. These nozzles are fluidically connected to a reservoir. A first colorant substantially fills the nozzles while a second colorant is reserved in the reservoir.