Printer ink cartridges
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United States of America Patent
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-
Mar 21, 2017
Grant Date -
Aug 11, 2016
app pub date -
Sep 30, 2013
filing date -
Sep 30, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A printer cartridge is disclosed that is under negative pressure to retain liquid and allows controlled ingress of atmospheric air to release liquid from the printer cartridge. A labyrinth on a surface of the printer ink cartridge provides controlled ingress of atmospheric air having an entrance chamber to allow entry of atmospheric air, an exit chamber in communication with the liquid, and an elongate channel extending between the entrance chamber and the exit chamber. The elongate channel having a raised track formed on the surface and extending along each side of the elongate channel.
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