Patent ID: 11865848
Assignee: KATEEVA, INC.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 6:
7. A print material feed system, comprising:
a first circulation circuit comprising:
a print material supply reservoir;
a print material drain reservoir;
a negative pressure gas flow unit coupled to the print material supply reservoir and to the print material drain reservoir;
at least one printhead;
a print material supply line fluidly coupled from the print material supply reservoir to the at least one printhead;
a print material return line fluidly coupled from the at least one printhead to the print material drain reservoir; and

a second circulation circuit comprising:
a circulation supply line coupled to the print material supply reservoir;
a circulation return line coupled to the print material drain reservoir; and
a pump that takes suction from the circulation return line and discharges to the circulation supply line.