| 发明名称 |
Pen maintenance system and method for operating same |
| 摘要 |
A pen having a printhead and a chamber for holding ink; a sensor for monitoring changes in the amount of ink in the chamber; and a pump for seletively drawing ink into or expelling ink from the chamber.
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| 申请公布号 |
US6722752(B2) |
申请公布日期 |
2004.04.20 |
| 申请号 |
US20020237274 |
申请日期 |
2002.09.04 |
| 申请人 |
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. |
发明人 |
DAVIS JEREMY A.;WALLER DAVID J.;HARPER KIT L. |
| 分类号 |
B41J2/165;B41J2/17;B41J2/175;(IPC1-7):B41J29/393 |
主分类号 |
B41J2/165 |
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