Pressure pump system
AssigneeXerox Corporation
InventorsRodney B. Hill, Edward F. Burress, Isaac Frazier
Life of this patent
Estimating the term…
Abstract
A system for delivering at least two distinct pressures to a print head of an ink jet printer includes a pump, a passage in communication with the pump and the print head, and a valve. The pump is for delivering positive pressure to the print head of the ink jet printer. The passage includes an opening, and the valve selectively opens and closes the opening.
Claims16
A system for delivering at least two distinct pressures to a print head of an ink jet printer, the system comprising:
- a pump for delivering positive pressure to the print head of the ink jet printer;
- a passage in communication with the pump and the print head, wherein the passage includes an opening;
- a valve that selectively changes a size of the opening between an open and a closed position;
- and
- a processor including timer, the valve being in electronic communication with the processor to control the valve, the processor controls the valve based upon measuring time that the valve has been closed.
A method for delivering at least two distinct pressures to a print head of an ink jet printer, the method comprising:
- providing a pump in communication with a print head of an ink jet printer through a passage, wherein the passage includes an opening;
- pumping a fluid through the passage to deliver a first predetermined positive pressure to the print head;
- and
- selectively bleeding off the fluid through the opening in the passage to deliver a second predetermined positive pressure to the print head.
A system for delivering pressure to a print head of an ink jet printer, the system comprising:
- a pump for delivering fluid to the print head of the ink jet printer;
- a passage in communication with the pump and the print head, the passage including an orifice upstream from the print head;
- a valve operative between an open position and a closed position for selectively allowing the passage of fluid through the orifice;
- and
- a processor in electronic communication with the pump, wherein the processor controls an amount of power delivered from an associated power source to the pump.
Dependencies are inferred from the claim text.