Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Patent
1992-10-05
1996-06-11
Fuller, Benjamin R.
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
B41J 2175
Patent
active
055260306
ABSTRACT:
The back pressure of an ink pen is maintained by providing a capillary member adjacent a bubble generator. Regardless of the orientation of the pen, the capillary member maintains a quantity of ink adjacent an orifice defined by the bubble generator. The quantity of ink serves to supply a liquid seal formed in the orifice. As the back pressure within the ink pen rises to its maximum level, the liquid seal within the orifice is overcome and ambient air bubbles into the reservoir to lower the back pressure. As the back pressure returns to a desirable point, ink trapped by the capillary member enters the orifice to reseal the orifice.
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Altendorf John M.
Baldwin Marc A.
Cowger Bruce
Duyck Ella M.
Elliot Joseph R.
Bobb Alrick
Fuller Benjamin R.
Hewlett--Packard Company
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