Ink level detection system for ink jet printing apparatus

The detection system includes a cartridge having a first detection port for detecting the pressure condition in the top portion of the cartridge and a second detection port and tube for detecting the pressure condition in a bottom portion of the cartridge. The cooperative printer structure couples t...

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Bibliographische Detailangaben
Hauptverfasser: SEXTON, GREGORY J, MULLINS, RANDAL L, YOUNG, LAWRENCE R, BRADLEY, BRIAN D
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The detection system includes a cartridge having a first detection port for detecting the pressure condition in the top portion of the cartridge and a second detection port and tube for detecting the pressure condition in a bottom portion of the cartridge. The cooperative printer structure couples these ports to a pressure differential sensor that signals a printer refill condition.