Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Reexamination Certificate
2001-12-14
2002-11-05
Nghiem, Michael (Department: 2861)
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
Reexamination Certificate
active
06474802
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of The Invention
The present invention relates to an ink cartridge suitable for an ink jet printer, and particularly to an ink cartridge having an air inlet part with a ventilate screw on a cover body thereof, thereby can efficiently supply ink to an ink delivery needle and avoid leaking during transportation, storage, or operation.
2. The Prior Art
In the conventional ink jet printer, the ink is loaded in an ink cartridge for supplying the ink to an ink delivery needle of the ink jet printer due to print paper. Referring to
FIG. 1
, the ink cartridge generally comprises an ink tank having an ink tank body
1
a
or a plurality of ink tank bodies for loading different color ink, wherein the ink tank body
1
a
is sealed with a cover body
2
a
thereon. The cover body
2
a
has an ink charging inlet
20
a
and an ambient air vent
21
a
and a sealing film
22
a
is attached on a top surface of the cover body
2
a
so as to seal the ambient air vent
21
a
. The tank body
1
a
has a bottom surface disposed with an ink outlet part
10
a
, and an accommodated chamber thereof positioned with an ink porous member
3
a
therein. Furthermore, firstly to remove the sealing film
22
a
, then to mount the ink cartridge into the ink jet printer, and the ink in fluid communication through the ink outlet part
10
a
of the ink tank body
1
a
to the ink delivery needle of the ink jet printer.
In the conventional ink cartridge, the top surface of the cover body
2
a
is formed with a circuitous channel
23
a
(shown in
FIG. 2
) that is extended with a long distance channel due to the ambient air vent
21
a
for ventilation. Additionally, the ink tank must be ventilated in order to equalize pressure differences for the printer to work properly, however, the ventilation of the ink cartridge often results in some of the ink evaporating during use, especially if the ink cartridge is used infrequently. Furthermore, some cases of the user from carelessly failing to remove the sealing film
22
a
from the cover body
2
a
before it is mounted on the ink delivery needle are mostly occurred.
Therefore, the conventional ink cartridge has some disadvantages what follows:
1. The cover body
2
a
has a complex top surface due to the circuitous channel
23
a.
2. The ink in the ink cartridge is evaporated easily due to the ambient air vent
21
a.
3. The users often failed to remove the sealing film
22
a
from the cover body
2
a
before it is mounted on the ink delivery needle due to no wrong prevention mechanism.
SUMMARY OF THE INVENTION
The primary purpose of the present invention is to provide an ink cartridge which can provide an air inlet part with a ventilate screw on a cover body thereof for ventilation, whereby the ink in an ink tank can be efficiently flowed out through an ink outlet part to an ink delivery needle of the ink jet printer.
Another purpose of the present invention is to provide an ink cartridge having a wrong prevention mechanism for avoiding forgetting to remove a sealing film on the cover body before the ink cartridge is mounted into the ink jet printer.
In accordance with one aspect of the present invention, an ink cartridge comprising an ink tank body having a plurality of surfaces defining an accommodating chamber therein and an ink outlet part disposed on one of the surfaces thereof. An ink porous member is positioned in the accommodating chamber of the tank body. A cover body has an ink charging inlet and an air inlet part, and being sealed the accommodating chamber of ink tank body. A ventilated screw with a hollow ring is arranged on the air inlet part of the cover body and defines a ventilated channel therein. A tab mechanism is installed to a position on one side of the cover body.
It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the invention as claimed. Other advantages and features of the invention will be apparent from the following description, drawings and claims.
REFERENCES:
patent: 6007192 (1999-12-01), Ahn
patent: 6019465 (2000-02-01), Shinada et al.
patent: 6264316 (2001-07-01), Chino
patent: 6273562 (2001-08-01), Deshmukh
patent: 11-129492 (1999-05-01), None
Monitek Electronics Limited
Nghiem Michael
Rosenberg , Klein & Lee
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