Inkjet printing system
OwnerKaren Wytmans Waggoner, John M. Wade +3inventors
InventorsKaren Wytmans Waggoner, John M. Wade, Paul Crivelli, Kan Liu, Grant Allen Webster
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Abstract
An ink delivery system that allows air to be absorbed by ink that is being delivered to an ink jet print cartridge that includes a thermal printhead, so that ink delivered to the printhead has an air saturation level of at least 30%. The dissolved air reduces damage to heater resistors of the thermal ink jet printhead that would otherwise be caused by the in rush of ink after an ink drop is fired.
Claims28
An ink delivery system for an ink jet printer having a thermal ink jet printhead, comprising:
- an ink container;
- and
- an ink conduit for transferring ink from said ink container to the print cartridge, said ink conduit configured to allow said ink to absorb air so that ink delivered to said printhead is at least 30% air saturated.
An ink delivery system for an ink jet printer having a thermal ink jet printhead, comprising:
- an ink container containing a supply of ink having an air saturation level of 20% or less;
- and
- an ink conduit for transferring ink from said ink container to the print cartridge, said ink conduit configured to allow said ink to absorb air so that ink delivered to said printhead is at least 30% air saturated.
An ink jet printing system comprising:
- a print cartridge having an ink jet printhead;
- said printhead having heater resistors, ink chambers disposed over said heater resistors, and nozzles offset relative to said heater resistors;
- an ink container;
- and
- an ink conduit for transferring ink from said ink container to said print cartridge, said ink conduit configured to allow said ink to absorb air so that ink delivered to said printhead is at least 30% air saturated.
A method of printing comprising:
- providing an ink supply for holding a supply of liquid ink having an air saturation level of 20% or less;
- transferring ink from the ink supply to an ink jet print cartridge having a thermal ink jet printhead;
- and
- while transferring ink from the ink supply, allowing air to be absorbed into the ink such that the ink jet printhead receives ink that is at least 30% air saturated.
A method of printing comprising:
- transferring ink from an ink supply to an ink jet print cartridge having a thermal ink jet printhead;
- and
- while transferring ink from the ink supply, allowing air to be absorbed into the ink such that the print cartridge receives ink that is at least 30% air saturated.
Dependencies are inferred from the claim text.