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US 2025/0144942 A1Published application
Print material feed system
AssigneeKateeva, Inc.
InventorsRobert Dennis Taff, Alexander Sou-Kang Ko, Stephen Mark Smith, Geoffrey Kenneth Love
Life of this patent
Estimating the term…
Abstract
An inkjet printer has a print assembly and a print material feed system comprising a first circulation circuit and a second circulation circuit, the first circulation circuit fluidly coupled between the second circulation circuit and the print assembly.
Claims21
1-20. (canceled)
An inkjet printing system, comprising:
- a print assembly;
- a local circulation circuit having a supply reservoir to supply print material to the print assembly, a drain reservoir to receive print material from the print assembly, and a negative pressure gas flow unit to control pressure in the supply reservoir and the drain reservoir;
- a bulk circulation circuit having a first pump to pump print material continuously around the bulk circulation circuit and to transfer print material to the local circulation circuit;
- a first valve to control flow of print material from the bulk circulation circuit to the local circulation circuit;
- a second pump to receive print material from the drain reservoir and to pump the print material through a second valve to the supply reservoir;
- and
- a controller configured to control the negative pressure gas flow unit to maintain flow of print material through the print assembly from the supply reservoir to the drain reservoir.
4 more elements
An inkjet printing system, comprising:
- a print assembly;
- a local circulation circuit having a supply reservoir to supply print material to the print assembly, a drain reservoir to receive print material from the print assembly, and a negative pressure gas flow unit to control pressure in the supply reservoir and the drain reservoir;
- a bulk circulation circuit having a first pump to pump print material continuously around the bulk circulation circuit and to transfer print material to the local circulation circuit;
- a middle circulation circuit fluidly coupled with the bulk circulation circuit and the local circulation circuit, the middle circulation circuit having a recycle valve;
- a first valve to control flow of print material from the bulk circulation circuit to the local circulation circuit;
- a second pump to receive print material from the drain reservoir and to pump the print material through a second valve to the supply reservoir;
- and
- a controller configured to control the negative pressure gas flow unit to maintain flow of print material through the print assembly from the supply reservoir to the drain reservoir and to control the recycle valve to flow print material from the middle circulation circuit to the local circulation circuit or to circulate the print material around the middle circulation circuit.
5 more elements
An inkjet printing system, comprising:
- a print assembly;
- a local circulation circuit having a supply reservoir to supply print material to the print assembly, a drain reservoir to receive print material from the print assembly, one or more level sensors coupled to the supply reservoir, the drain reservoir, or both, and a negative pressure gas flow unit to control pressure in the supply reservoir and the drain reservoir;
- a bulk circulation circuit having a first pump to pump print material continuously around the bulk circulation circuit and to transfer print material to the local circulation circuit;
- a middle circulation circuit fluidly coupled with the bulk circulation circuit and the local circulation circuit, the middle circulation circuit having a recycle valve;
- a first valve to control flow of print material from the bulk circulation circuit to the local circulation circuit;
- a second pump to receive print material from the drain reservoir and to pump the print material through a second valve to the supply reservoir;
- and
- a controller configured to control the negative pressure gas flow unit to maintain flow of print material through the print assembly from the supply reservoir to the drain reservoir and to control the recycle valve to flow print material from the middle circulation circuit to the local circulation circuit or to circulate the print material around the middle circulation circuit.
5 more elements
Dependencies are inferred from the claim text.