Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Patent
1997-11-25
2000-03-28
Le, N.
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
B41J 2175
Patent
active
060422246
ABSTRACT:
An ink tank 1 includes a main ink chamber 11 and a intermediate chamber 16. A second meniscus forming member 17 is provided in a joint portion 2 to be coupled with a printhead 3. A filter 22 is provided in an ink introducing portion 4 of the printhead 3, which is to be coupled with the ink tank 1. The open-space diameter of the second meniscus forming member 17 is selected to be equal to that of the filter 22. With such a construction, the number of foreign materials flowing from the ink tank 1 to the filter 22 is reduced. The result is to reduce a frequency of occurrence of the filter clogging and to elongate a normally operable time of the printer. A fluid resistance in the ink passage ranging from the filter 22 to the nozzle is high. Therefore, air that is left in the jointing portion flows through the second meniscus forming member 17 into the intermediate chamber 16 of the ink tank 1. Therefore, there is eliminated such an unwanted situation that air bubbles enter the printhead and given rise to defects in a printed picture.
REFERENCES:
patent: 5589862 (1996-12-01), Ujita et al.
patent: 5760806 (1998-06-01), Oda et al.
patent: 5886721 (1999-03-01), Fujii et al.
Fujii Katsuyuki
Oda Kazuyuki
Tamura Harumi
Tomikawa Ichiro
Fuji 'Xerox Co., Ltd.
Le N.
Nghiem Michael
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