INK LEVEL DETECTION BY ELECTRONIC MEANS

An ink cartridge configured to hold an ink includes a substantially hollow body including an inner space and a substantially continuous inner wall. An optical prism in the inner space is disposed at a predetermined distance from the continuous inner wall such that an ink pocket is defined by a prism...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BALDWIN, MARC A, OGLE, HOLLI C, STATHEM, RALPH L
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES MEASURING MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL METERING BY VOLUME PERFORMING OPERATIONS PHYSICS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TESTING TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	An ink cartridge configured to hold an ink includes a substantially hollow body including an inner space and a substantially continuous inner wall. An optical prism in the inner space is disposed at a predetermined distance from the continuous inner wall such that an ink pocket is defined by a prism wall and the continuous inner wall. The prism includes at least one reflection site formed at an angle configured to reflect light from a light source through the prism at a predetermined height relative to a bottom of the body. If ink is present in the ink pocket at a level below at least a portion of the reflection site, the ink does not block the light reflected off of the portion of the reflection site from traveling across the ink pocket at the predetermined height, such that the reflected light is externally detectable by electronic means.