发明名称 |
Ink level detection in a pressure regulated pen |
摘要 |
The present invention relates to Ink Level Detection in a Pressure Regulated Pen. A liquid level detector for a liquid containment device, such as an ink-jet pen, provides a signal indicative of a lowering level of liquid in the containment device. In exemplary embodiments, a refillable or replaceable ink reservoir supplies ink to the printhead of the pen under pressure. Electrical or electromagnetic devices are used individually or in combination with a pressure regulator apparatus to sense a back pressure in the containment device after the reservoir has gone dry to trigger a signal indicating a low or out-of-ink condition.
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申请公布号 |
US5583545(A) |
申请公布日期 |
1996.12.10 |
申请号 |
US19940331453 |
申请日期 |
1994.10.31 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
PAWLOWSKI, JR., NORMAN E.;HAUCK, MARK;COWGER, BRUCE;ELGEE, STEVEN B.;GAST, PAUL D. |
分类号 |
B41J2/175;G01F23/00;G01F23/72;(IPC1-7):B41J2/195 |
主分类号 |
B41J2/175 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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