发明名称 |
Ink jet printhead having a preloaded check valve. |
摘要 |
<p>A preloaded check valve disposed in a valve body (1) between an ink reservoir (3) and a printhead (11) has a valve opening pressure or "cracking" pressure at least sufficient to overcome the hydrostatic pressure due to gravity of ink in the reservoir (3). This prevents depriming or leakage of ink at the orifices of the orifice plate (116) forming part of the ink ejecting mechanism. Ejection of ink during printing creates a pressure differential across the valve sufficient to cause it to open and replenish the ink supply at the ink ejecting mechanism. </p> |
申请公布号 |
EP0238829(A2) |
申请公布日期 |
1987.09.30 |
申请号 |
EP19870101966 |
申请日期 |
1987.02.12 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
NIELSEN, NIELS |
分类号 |
B41J2/045;B41J2/055;B41J2/175;F16K15/14;(IPC1-7):B41J3/04 |
主分类号 |
B41J2/045 |
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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