Determining the conductivity of a liquid
AssigneeHewlett-Packard Development Company, L.P.
InventorsMatthew G. Lopez, David F. Chiu, David Sabo, John W. Godden, Christopher S. Tanner, Eric G. Nelson, Guang Jin Li, James Michael Pingel
Life of this patent
Estimating the term…
Abstract
In one example, a processor readable medium has instructions thereon that, when executed by a processor, cause a system to detect a change in electrical conduction of a liquid moving at an interface between two surfaces and determine a conductivity of the liquid based on the detected change in conduction.
Claims17
A non-transitory processor-readable medium having instructions thereon that, when executed by a processor, cause a system to:
- detect a change in electrical conduction of a liquid moving at an interface between two surfaces;
- and
- determine a conductivity of the liquid based on the detected change in conduction.
A system for determining the conductivity of a liquid, comprising:
- a first curved surface;
- a second curved surface;
- and
- a controller configured to:
- move one or both surfaces close to or against the other surface;
- apply multiple voltages between the surfaces while one or both surfaces are moving;
- for each voltage applied between the surfaces, measure current through a liquid between the surfaces;
- and
- determine a point at which the measured current as a function of the applied voltage changes from a first function to a second function.
A printer, comprising:
- a photoconductor;
- an imaging device to form a pattern of a desired image on the photoconductor;
- an image developer including a first roller to apply LEP ink to the photoconductor and a second roller;
- a transfer member to transfer an ink image from the photoconductor to a print substrate;
- and
- a controller including a memory and a processor operatively connected to the memory to execute programming instructions on the memory, the memory having programming thereon with instructions for:
- rotating the first and second rollers close to or against one another at an interface;
- introducing LEP ink into the interface between the rotating rollers;
- identifying a Paschen breakdown in the LEP ink at the interface;
- and
- determining a conductivity of the LEP ink based on the identified Paschen breakdown.
A method for determining the conductivity of a liquid, comprising:
- moving a liquid between two surfaces;
- identifying a Paschen breakdown for the liquid between the two surfaces;
- and
- determining a conductivity of the liquid based on the identified Paschen breakdown.
Dependencies are inferred from the claim text.