Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Patent
1994-01-03
1997-08-12
Le, N.
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
347 87, B41J 2175
Patent
active
056570651
ABSTRACT:
The invention includes an ink delivery and filtration medium for delivering and filtering ink from an ink chamber to a printhead in an ink jet system. The ink delivery and filtration medium comprises a porous woven material. The woven material can be made with fibers such as Nylons, polyethylene, polypropylene, polyethersulfone, polyesters, polyvinylidene fluoride, polytetrafluoroethylene. The woven material is flexible, thermally stable and chemically resistant to ink. The pore size and porosity of the woven material can be controlled by controlling the number of stitches per inch, fiber stitching pattern and fiber thickness or diameter. In addition, the pore size can be controlled by layering the woven material in combination with woven materials of the same or different pore sizes. Accordingly, not only can the pore size of each layer be controlled, but the pore size of the entire medium can be controlled by cumulative stacking of layers of materials with same or different pore size. The ink delivery and filtration medium provides smooth ink flow to the printhead without undesired ink clogging and impedance thereby substantially minimizing or eliminating jetting problems such as missing jets, exploding jets, and ink misdirection. In addition, restricted ink flow due to inefficient filtration and blockage of the filter by particles, debris or fibers, which causes slow ink refill and air ingestion problems resulting in slow printing speed and poor ink jet print quality can also be avoided or minimized by the steady and strong flow of ink produced with the invention.
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Le N.
Xerox Corporation
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