Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
2002-03-11
2003-09-16
Vo, Anh T. N. (Department: 2861)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
Reexamination Certificate
active
06619790
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an ink-jet printer cartridge upper cover, and more particularly, to an ink-jet printer cartridge upper cover with the setting of a non-rigid sealing ring for the purpose of sealing with other portions of the upper cover to prevent the ink from leakage.
2. Description of the Prior Art
Please refer to
FIG. 1
of a cross sectional view of a prior art ink-jet printer cartridge upper cover
12
. The ink-jet printer cartridge upper cover
12
engages with a vent-tip
13
. The upper cover
12
further includes an opening
15
, and the vent-tip
13
also includes an air passageway
16
. For the purpose of communicating the ambient air outside the ink-jet printer cartridge upper cover
12
and the air inside of it the vent-tip
13
further includes another opening
18
located at the top end of the air passageway
16
. The setting of protruded portion
19
protruded around and from the surface of the vent-tip
13
is for the engagement of the vent-tip
13
with the upper cover
12
. The protruded portion
19
is designed to prevent the ink from leaking through the opening
15
of the upper cover
12
. However, the protruded portion
19
may be rubbed to a level due to the friction with the upper cover
12
once it is going to engage with the upper cover
12
, thus leading to some gaps between the protruded portion
19
and the upper cover
12
. As this result, the original purpose of setting the protruded portion
19
will be undermined, and that is why the leakage of the inkthrough the opening
15
may occur under this kind of condition.
SUMMARY OF THE INVENTION
It is therefore a primary objective of the present invention to provide an ink-jet printer cartridge upper cover with a non-rigid sealing ring for the purpose of sealing with other portions of the ink-jet printer cartridge upper cover tightly. In other words, the non-rigid sealing ring is like a buffer between the upper cover and the vent-tip, and, additionally, because of setting of this detachable non-rigid sealing ring, the entire manufacturing process is improved in the time and labor cost wise.
In accordance with the claimed invention, an ink-jet printer cartridge upper cover includes an inner tube, an outer tube, a non-rigid sealing ring defining a hole at the center portion thereof, and a vent-tip forming a cavity about the bottom surface thereof and having an air passageway extending from the bottom surface of the cavity through the non-rigid sealing ring hole, the upper cover inner tube, and the upper cover outer tube. Inner surface of the non-rigid sealing ring hole engages with the outer surface of the upper cover inner tube, and the outer surface of the hole engages with the inner surface of the cavity.
It is an advantage of the present invention that addition of detachable non-rigid sealing ring not only seals with other portions of the upper cover very tightly to prevent any ink leakage, but accelerate the entire manufacturing flow while integrating the non-rigid sealing ring into the upper cover.
REFERENCES:
patent: 4871077 (1989-10-01), Ogden et al.
patent: 5949461 (1999-09-01), Jones et al.
patent: 6132036 (2000-10-01), Abe et al.
patent: 6273562 (2001-08-01), Deshmukh
patent: 6276788 (2001-08-01), Hilton
Law Yiu Cheong
Lui Pui Kuong
Monitek Electronics Limited
Rosenberg , Klein & Lee
Vo Anh T. N.
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