Identifying primed printheads
AssigneeHewlett-Packard Development Company, L.P.
InventorsJeffrey A Wagner, David Welter, Eng Gee Jonny Goh
Life of this patent
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Abstract
Priming printheads can, in various examples, include moving a movable member of a printhead from a first position to a second position, measuring a response time of the movable member to move from the first position to the second position, and identifying the printhead as primed.
Claims15
A method, comprising:
- moving a movable member of a printhead from a first position to a second position to cause ink to flow from an ink supply into the printhead to prime the printhead;
- measuring a response time of the movable member to move from the first position to the second position;
- and
- identifying the printhead as primed when the measured response time satisfies a threshold time.
A non-transitory computer readable medium storing instructions executable by a processing resource to cause a computer to, comprising
- actuate a drive mechanism to cyclically move a movable member of a printhead from a first position to a second position;
- measure respective response times of the movable member to move from the first position to the second position;
- estimate an ink supply pressure for each of the respective response times;
- and
- identify the printhead as primed when an estimated pressure satisfies a threshold pressure.
The non-transitory computer readable medium 8, including instructions to continue to cyclically move the movable member of a printhead from the first position to the second position when the estimated pressure does not satisfy the threshold pressure.
A printing system comprising:
- an ink supply including a flexible diaphragm;
- a pressurization system including:
- a movable member;
- a base member;
- and
- a spring coupled to the base member and the movable member;
- a drive mechanism to cyclically move the movable member from a first position associated with the base member to a second position associated with the flexible diaphragm;
- a sensor to sense the movable member at the second position;
- and
- a controller to identify a printhead as primed when a measured response time of the moveable member satisfies a threshold time.
Dependencies are inferred from the claim text.