Filter assembly for a print cartridge container for removing contaminants from a fluid
AssigneeLexmark International, Inc.
InventorCarl Edmond Sullivan
Life of this patent
Estimating the term…
Abstract
A filter is provided for filtering contaminants from a fluid passing through the filter. The filter comprises a silicon substrate having opposing first and second surfaces and a passage extending through it. A first etch resistant material layer is formed on the first substrate surface and includes at least one opening which extends through the first layer and communicates with the substrate passage. A second etch resistant material layer is formed on the second substrate surface and includes a plurality of pores which extend through the second layer and communicate with the substrate passage. The second layer defines a filter layer which filters contaminants from fluid passing through the second layer. A process for forming the filter is also provided.
Claims12
A print cartridge container/filter assembly comprising:
- a container including at least one chamber for receiving ink, said container including a standpipe extending into said chamber and defining a passageway for ink to flow out from said chamber;
- and
- a filter associated with said standpipe for filtering contaminants from the ink prior to the ink flowing out from said standpipe, said filter comprising a silicon substrate having opposing first and second surfaces and a passage extending therethrough, a first etch resistant material layer formed on said first substrate surface and including at least one opening which extends through said first layer and communicates with said substrate passage, and a second etch resistant material layer formed on said second substrate surface and including a plurality of pores extending through said second layer and communicating with said substrate passage, said second layer defining a filter layer which filters contaminants from ink passing through said second layer,
- wherein said filter includes an outer circumferential recess which is adapted to mate with an end portion of said standpipe.
Dependencies are inferred from the claim text.