发明名称 |
Spring-bag printer ink cartridge with volume indicator |
摘要 |
An ink jet pen supply cartridge having a spring biased ink bag with a visual indication of remaining ink quantity. The spring-bag reservoir tends to collapse laterally as the ink supply decreases due to differential pressure exerted thereto. The spring-bag is contained in a rigid cartridge and a pair of flexible tape members are cemented or welded, one to each side of the spring-bag, and extend generally parallel toward a narrow end surface of the cartridge at which they overlap and can be viewed through a window. The overlapping relationship of the tape members provide ink quantity indicia which change as the spring-bag collapse draws them past each other.
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申请公布号 |
US5359353(A) |
申请公布日期 |
1994.10.25 |
申请号 |
US19910717735 |
申请日期 |
1991.06.19 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
HUNT, DAVID S.;REID, W. BRUCE |
分类号 |
B41J2/175;(IPC1-7):B41J2/17 |
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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