Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
1999-12-16
2001-04-10
Le, N. (Department: 2861)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
Reexamination Certificate
active
06213599
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an ink-jet cartridge for an ink-jet printing apparatus, and in particular, to an ink-jet cartridge employing a porous transmission medium to transmit ink.
BACKGROUND OF THE INVENTION
A conventional ink-jet cartridge is provided with or mounted on an ejecting device. By means of the ejecting device, the ink within the ink-jet cartridge is ejected and printed onto a substrate. However, in order to stably deliver ink with no ink leakage in the ink-jet printing process by the ejecting device, a negative pressure regulating device and an air filling unit are provided within the ink-jet cartridge, for example, as disclosed in U.S. Pat. Nos. 5,409,134 and 5,541,632. This way provides smooth ink delivery without ink leakage, but an additional negative pressure regulating device and an air filling unit are provided. The structures disclosed in these prior art patents are rather complicated and the precision thereof must be quite high. Therefore, its production cost is relatively high.
Another conventional ink-jet cartridge is provided with an absorptive material, such as a sponge, to prevent ink leakage
However, in this conventional ink-jet cartridge, the entire room within the inkjet cartridge has to be filled with a sponge in order to obtain a good effect of zero ink leakage. Only 60% of the ink within the conventional ink-jet cartridge can be ejected and the remaining ink is kept by the sponge and cannot be ejected. Therefore, it becomes a waste of material.
SUMMARY OF THE INVENTION
It is accordingly an object of the present invention to provide an ink-jet cartridge for an ink-jet printing apparatus that achieves the effect of smooth ink delivery and zero ink leakage during printing.
Another object of the invention is to provide an ink-jet cartridge for an ink-jet printing apparatus, wherein the inkjet cartridge is simple in structure and easy to assemble. In addition, substantially all the ink within the ink-jet cartridge is ejectable for printing.
To achieve the above objects, the ink-jet cartridge for an ink-jet printing apparatus in accordance with the invention comprises a rigid body having an ink reservoir for holding ink within the rigid body and an ink output port at one end of the body so that the ink within the ink reservoir is ejected from the output port; and a porous transmission medium disposed within the ink reservoir of the rigid body, having one end connected to the ink output port so that the ink within the ink reservoir is transmitted to the ink output port through the transmission medium by the capillary action.
Thus, in the process of ink-jet printing, when the ink is ejected through the ink output port, the porous transmission medium transmits ink from the ink reservoir to the ink output port. Thereby, the effects of no ink leakage and smooth ink delivery can be obtained. In addition, the ink-jet cartridge is simple in structure and easy to assemble. The ink-jet cartridge occupies only little of the space within the ink reservoir and the major portion of the ink can be ejected for printing.
REFERENCES:
patent: 5877794 (1999-03-01), Takagi
patent: 5886721 (1999-03-01), Fujii et al.
patent: 6082852 (2000-07-01), Soga et al.
Sung Wen-kang
Tsai Hsien-Shu
Wu Ji-chen
Le N.
Vo Anh T. N.
Wisertek International Corporation
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