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US 6,644,797 B2Granted
Filter for an ink jet pen
AssigneeHewlett-Packard Development Company, L.P.
InventorsPaul Mark Haines, James W. Ring, Gary D. Tarver
Life of this patent
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Abstract
An inkjet pen is disclosed having an interior chamber containing a pressure regulator. A filter within the interior chamber substantially surrounds the pressure regulator, providing a large filter surface area, and hence a low resistance to ink flow. The filter may be formed of a pleated filter material; the filter material may be retained by a rigid ink passage flange and a filter cap.
Claims1
An inkjet pen, comprising:
- a pen body having an interior chamber;
- a pen cap;
- an ink filter within the pen body interior chamber, the ink filter having a hollow interior surrounded by a filter material folded in multiple pleats and having at least one open end;
- a pressure regulator within pen body interior chamber, the pressure regulator nested within the hollow interior of the filter;
- the pen cap substantially closing the pen body interior chamber when the pen cap and pen body are coupled together;
- and wherein the pressure regulator is affixed to the pen cap and suspended within the filter hollow interior.
3 more elements
Dependencies are inferred from the claim text.