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US 11,448,989 B2Granted
Determining thickness of a layer of wet printing fluid
AssigneeHP Indigo B.V.
InventorsMatan Schneider, Fernanda Orlik
Life of this patent
Estimating the term…
Abstract
A printing apparatus is described in which a guide member biases a printing substrate with a layer of printing fluid toward an electrode array with a plurality of electrodes. Processing circuitry determines a dryness of the layer of printing fluid based on an output of the electrode array when the plurality of electrodes is in electrical contact with the printing substrate.
Claims15
A printing apparatus comprising:
- an electrode array comprising a plurality of electrodes;
- a guide member to bias, in use, a printing substrate comprising a layer of printing fluid, towards the plurality of electrodes;
- and
- processing circuitry to determine a dryness of the layer of printing fluid based on an output of the electrode array when the plurality of electrodes is in electrical contact with the printing substrate.
1 more element
A method of operating a printing apparatus comprising:
- feeding a printing substrate comprising a layer of wet printing fluid, the printing substrate being fed between:
- an electrode array comprising a plurality of electrodes contacting the layer of wet printing fluid;
- and
- a guide member biasing the printing substrate towards the plurality of electrodes;
- and
- determining moisture content of the layer of wet printing fluid based on an output of the electrode array when the plurality of electrodes is in electrical contact with the printing substrate.
3 more elements
A printing apparatus comprising:
- an electrode array comprising a plurality of electrodes configured to contact a layer of wet printing fluid of a printing substrate, the electrode array extending in a first direction along a surface of the printing substrate and substantially perpendicular to a travel direction of the printing substrate;
- and
- processing circuitry configured to determine an index of a thickness of the layer of wet printing fluid based on an output of the electrode array when the plurality of electrodes is in electrical contact with the printing substrate, and to determine a thickness map comprising datapoints in the first direction, and further comprising datapoints in the travel direction as the printing substrate is moved past the plurality of electrodes, wherein each datapoint is an index of the thickness of the layer of wet printing fluid at a predetermined location on the printing substrate.
Dependencies are inferred from the claim text.