发明授权
US4931811A Thermal ink jet pen having a feedtube with improved sizing and
operational with a minimum of depriming
失效
热喷墨笔具有具有改进的尺寸并具有最小剥落功能的进料管
- 专利标题： Thermal ink jet pen having a feedtube with improved sizing and operational with a minimum of depriming
- 专利标题（中）： 热喷墨笔具有具有改进的尺寸并具有最小剥落功能的进料管
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申请号： US304549申请日： 1989-01-31
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公开(公告)号： US4931811A公开(公告)日： 1990-06-05
- 发明人: Bruce Cowger , Niels J. Nielsen , John H. Dion
- 申请人： Bruce Cowger , Niels J. Nielsen , John H. Dion
- 申请人地址： CA Palo Alto
- 专利权人： Hewlett-Packard Company
- 当前专利权人： Hewlett-Packard Company
- 当前专利权人地址： CA Palo Alto
- 主分类号： B41J2/175
- IPC分类号： B41J2/175 ; B41J2/05 ; B41J2/19
摘要：
An ink jet pen having a main ink reservoir therein connected to a thin film printhead by way of a large diameter standpipe, wherein the diameter of an air accumulating section of the standpipe is sufficiently large to enable ink to pass through the standpipe despite the presence of air in the air accumulating section when the printhead is in operation. The large diameter air bubbles which form in the air accumulating section are easily deformed by suction force from the printhead and thus allow ink to pass through the standpipe between the air bubbles and the walls of the standpipe. This action enables the ink jet pen to operated continuously without undue suction on the standpipe which leads to depriming.
公开/授权文献
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