Ink cartridge for a printer
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United States of America Patent
Stats
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Jul 24, 2007
Grant Date -
Mar 31, 2005
app pub date -
Oct 15, 2002
filing date -
Oct 31, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The ink cartridge comprises a cartridge body with an ink chamber. On one side of the cartridge body is provided an ink supply port, and an air channel is positioned on the opposite side. The ink chamber is composed of a main chamber and a communicating sub-chamber, and ink-out inspection prism being provided close to the communicating portion. A check valve through which the sub-chamber is communicated with the ink supply port is provided sideways between the sidewalls adjacent to the ink supply port. In this invention, the nominal volume of each ink cartridge is increased, and there is no such problem that a certain amount of ink continues to be fed after the ink-out indicative signal being sent out in case of no porous material. Further, the technical solution of the sideways-provided check valve improves the manufacturability and the ink supply stability.
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