Claims
- 1. A method for reducing residual air bubbles in an inkjet print cartridge containing ink, comprising:
- providing an empty inkjet print cartridge having an ink fill port;
- providing a source of carbon dioxide; and
- flushing air from the empty inkjet print cartridge by passing the carbon dioxide under pressure into the empty inkjet print cartridge through a fill needle positioned within the ink fill port.
- 2. The method of claim 1 wherein flushing air from the empty inkjet print cartridge further comprises allowing the air and carbon dioxide to pass out of the inkjet print cartridge through the fill port, adjacent the fill needle positioned within the fill port, while passing the carbon dioxide under pressure into the empty cartridge through the fill needle.
- 3. The method of claim 1 wherein flushing air from the empty inkjet print cartridge further comprises allowing carbon dioxide into the empty inkjet print cartridge through ink ejection nozzles formed therein and allowing the air and carbon dioxide to pass out of the empty inkjet print cartridge, adjacent the fill needle positioned within the fill port.
- 4. The method of claim 1 wherein flushing the empty inkjet print cartridge continues for approximately one to ten seconds.
- 5. The method of claim 1 comprising sealing the ink fill port of the empty cartridge after flushing with carbon dioxide.
- 6. The method of claim 1 comprising filling the empty inkjet print cartridge with ink through the ink fill port after flushing with carbon dioxide.
- 7. A method for reducing residual air bubbles remaining in an inkjet print cartridge after filling, comprising:
- providing an empty inkjet print cartridge having an ink fill port and ink ejection nozzles for ejecting ink on a print media;
- providing a source of carbon dioxide;
- applying a vacuum at the ink ejection nozzles; and
- flushing the empty inkjet print cartridge by passing the carbon dioxide under pressure into the empty inkjet print cartridge through a fill needle positioned within the ink fill port in order to remove air from inside the empty inkjet print cartridge through said ink ejection nozzles.
- 8. The method of claim 7 wherein flushing the empty inkjet print cartridge further comprises allowing the air and carbon dioxide to pass out of the empty inkjet print cartridge through the ink fill port, adjacent the fill needle positioned within the fill port, while passing the carbon dioxide under pressure into the empty inkjet print cartridge through the fill needle.
- 9. The method of claim 7 wherein flushing the empty inkjet print cartridge continues for approximately one to ten seconds.
- 10. The method of claim 7 comprising sealing the ink fill port of the empty inkjet print cartridge after flushing with carbon dioxide.
- 11. The method of claim 7 comprising filling the empty inkjet print cartridge with ink through the ink fill port after flushing with carbon dioxide.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application relates to the subject matter disclosed in U.S. patent application Ser. No. 08/550,143, filed Oct. 30, 1995, entitled "Bubble Tolerant Manifold Design for Inkjet Cartridge" which is herein incorporated by reference.
US Referenced Citations (31)
Foreign Referenced Citations (1)
Number |
Date |
Country |
314 486 |
May 1989 |
EPX |