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1. WO2006101707 - PRINTER HAVING ADJUSTABLE INK DELIVERY SYSTEM PRESSURE

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]
WHAT IS CLAIMED IS:

1. An ink delivery system for a printer (10), the ink delivery system comprising:
an ink reservoir (15);
a printhead assembly (12);
a pump (23) configured to provide ink from the ink reservoir to the printhead assembly at a selected pressure; and
a controller (20) configured to adjust the selected pressure based on a characteristic of an image to be printed.

2. The ink delivery system of claim 1, wherein the characteristic of the image is a density of the image.

3. The ink delivery system of claim 1 or 2, wherein the controller is configured to adjust the selected pressure based on a firing frequency of the printhead assembly.

4. The ink delivery system of claim 1, wherein the pump comprises one of an air pump and a peristaltic pump.

5. The ink delivery system of claim 1 wherein the ink reservoir comprises a flexible ink reservoir.

6. The ink delivery system of claim 1, wherein the controller is configured to adjust the selected pressure to prevent printhead starvation and printhead drool.

7. A method for pressurizing ink in a printer (10), the method comprising:
analyzing an image to be printed to determine a density of the image; and
adjusting a pump (23) to provide a selected ink pressure to a printhead (24) based on the density of the image.

herein. Therefore, it is intended that this invention be limited only by the claims and the equivalents thereof.

10

8. The method of claim 7, wherein adjusting the pump to provide the selected ink pressure provided to the printhead comprises adjusting the pump to provide the selected ink pressure based on a firing frequency of the printhead.

9. The method of claim 7 or 8, comprising:
providing an air pump configured to pressurize a flexible ink reservoir (15).

10. The method of claim 9, wherein adjusting the pump to provide the selected ink pressure comprises adjusting an air pressure of the air pump to pressurize the flexible ink reservoir.