Back to results
US 2021/0260873 A1Published application
Flow-through printhead with bypass manifold
AssigneeRicoh Company, Ltd.
InventorHiroshi Nishimura
Life of this patent
Estimating the term…
Abstract
Printheads for a jetting apparatus. In one embodiment, a printhead comprises a plurality of flow-through jetting channels each configured to jet a print fluid out of a nozzle. The printhead further includes a supply manifold fluidly coupled to the flow-through jetting channels, a return manifold fluidly coupled to the flow-through jetting channels, and one or more bypass manifolds fluidly coupled between the supply manifold and the return manifold.
Claims20
A printhead comprising:
- a plurality of flow-through jetting channels configured to jet a print fluid, wherein each of the jetting channels includes a pressure chamber, a nozzle at a first end of the pressure chamber, a diaphragm at a second end of the pressure chamber opposite the first end, and an actuator that contacts the diaphragm;
- a supply manifold disposed within the printhead that is fluidly coupled to the jetting channels;
- a return manifold disposed within the printhead that is fluidly coupled to the jetting channels;
- and
- at least one bypass manifold disposed between the supply manifold and the return manifold that fluidly couples the supply manifold and the return manifold separately from the jetting channels.
2 more elements
A printhead comprising:
- a plurality of flow-through jetting channels configured to jet a print fluid that are arranged in one or more rows along a length of the printhead, wherein each of the jetting channels includes a pressure chamber, a nozzle at a first end of the pressure chamber, a diaphragm at a second end of the pressure chamber opposite the first end, and an actuator that contacts the diaphragm;
- a supply manifold within the printhead disposed between a first Input/Output (I/O) port and the jetting channels, wherein major sections of the supply manifold are disposed longitudinally within the printhead and are fluidly coupled to the jetting channels through first restrictors;
- a return manifold within the printhead disposed between a second I/O port and the jetting channels, wherein major sections of the return manifold are disposed longitudinally within the printhead and are fluidly coupled to the jetting channels through second restrictors;
- and
- at least one bypass manifold disposed between the supply manifold and the return manifold that fluidly couples the supply manifold and the return manifold in addition to the jetting channels.
2 more elements
A jetting apparatus comprising:
- at least one printhead configured to jet droplets onto a medium;
- and
- a controller configured to control the at least one printhead;
- wherein the at least one printhead includes:
- a plurality of flow-through jetting channels arranged in one or more rows along a length of the at least one printhead, wherein each of the jetting channels includes a pressure chamber, a nozzle at a first end of the pressure chamber, a diaphragm at a second end of the pressure chamber opposite the first end, and an actuator that contacts the diaphragm;
- a supply manifold within the at least one printhead disposed between a first Input/Output (I/O) port and the jetting channels, wherein major sections of the supply manifold are disposed longitudinally within the at least one printhead and are fluidly coupled to the jetting channels through first restrictors;
- a return manifold within the at least one printhead disposed between a second I/O port and the jetting channels, wherein major sections of the return manifold are disposed longitudinally within the at least one printhead and are fluidly coupled to the jetting channels through second restrictors;
- and
- at least one bypass manifold disposed between the supply manifold and the return manifold that fluidly couples the supply manifold and the return manifold in addition to the jetting channels.
6 more elements
Dependencies are inferred from the claim text.