SYSTEM AND METHOD FOR PRESERVING INKJET OPERATIONAL STATUS DURING LONG PERIODS OF PRINTER INACTIVITY
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Sep 27, 2023
filing date -
Sep 27, 2023
priority date (Note) -
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Abstract
An inkjet printer includes a printhead maintenance station that injects a high pH fluid into the inkjet stacks of the printheads in the printer to prevent ink contamination during long periods of printer inactivity. The printhead maintenance station includes a printhead cap having an opening, a printhead vent blocking member configured to block manifold vents in the printhead when the printhead engages the printhead vent blocking member, and a valve. The valve is positioned within the printhead cap to enable the printhead cap to hold a volume of high pH fluid entering the printhead cap through the opening in the printhead cap when the valve is closed and to enable egress of the high pH fluid when the valve is opened. A printhead is lowered onto the printhead cap and a vacuum applied to an ink supply line to the printhead to inject the high pH liquid into the printhead.
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