초록 ▼

In a inkjet print cartridge ink flows from the reservoir around the edge of the silicon substrate before being ejected out of the nozzles. During operation, warm thermal boundary layers of ink form adjacent the substrate and dissolved gases in the thermal boundary layer of the ink form the bubbles.

In a inkjet print cartridge ink flows from the reservoir around the edge of the silicon substrate before being ejected out of the nozzles. During operation, warm thermal boundary layers of ink form adjacent the substrate and dissolved gases in the thermal boundary layer of the ink form the bubbles. If the bubbles to grow larger than the diameter of subsequent ink passageways these bubbles choke the flow of ink to the vaporization chambers. This results in causing some of the nozzles of the printhead to become temporarily inoperable. The disclosure describes a method of avoiding such a malfunction in a liquid inkjet printing system by providing a method for reducing residual air bubbles in an inkjet print cartridge by flushing the empty cartridge by passing carbon dioxide through the fill port or the ink ejection nozzles prior to filling the print cartridge with ink and thereby eliminating residual air bubbles from the print cartridge when the print cartridge is filled with ink.

대표청구항 ▼

[ What is claimed is:] [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; andflushing air from the empty inkjet print cartridge by passing the

[ What is claimed is:] [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; andflushing 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.