Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Patent
1996-05-16
1998-04-28
Yockey, David F.
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
347 86, B41J 2175
Patent
active
057451389
ABSTRACT:
An ink jet cartridge comprising an ink chamber, at least one aperture coupling a pressure relief chamber to the ink chamber, the aperture having a small internal diameter for creating a negative pressure on any ink in the lower portion of the ink chamber and a plurality of microparticles positioned in the pressure relief chamber for forming a plurality of small interstices which form a capillary path in the pressure relief chamber, the microparticles creating a negative pressure on any ink in the lower portion of the ink chamber and the selected size of the microparticles resulting in a capillary path of selected size for controlling the magnitude of the negative pressure in the lower portion of the ink chamber. The pressure relief chamber is positioned below the ink chamber, the ink chamber including an opening to couple the ink cartridge to an ink jet head and the aperture is positioned at the lower portion of the ink chamber.
REFERENCES:
patent: 4875059 (1989-10-01), Masuda
patent: 5079570 (1992-01-01), Mohr et al.
patent: 5567373 (1996-10-01), Sato et al.
Annick Christina
Porter, Jr. William F.
Smith Frederic P.
Yockey David F.
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