Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Patent
1998-12-04
2000-09-12
Le, N.
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
B41J 2175
Patent
active
06116724&
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention consists of a re-loading device for ink-jet writing head, particularly suitable for re-loading a three-colour ink-jet writing head, often used in the printers constituting one of the most widespread and common interface means with the user. The re-loading device includes a mechanical device for removing from the body of an ink-jet writing head the original cover used by the producer and a substitute cover which is connected to the body of the ink-jet writing head in place of the original cover, where the substitute cover has the same size and shape as the original one and includes at least one tank containing the ink to be transferred into a tank positioned inside the body of the ink-jet writing head.
PRIOR ART
The printers constitute one of the most widespread and common terminals, which can be advantageously used in many technical fields, for instance: (telex, fax, etc.), or combined with a complex telecommunication system, said printers constituting one of the outlet means; calculator to personal computer, to a computerised data-processing centre of a large company, and so on), wherein said printers constitute one of the most widespread interface means with the user, when they are not the only available interface means.
There are on the market many well-known different printers which can be classified according to many features, e.g. the writing head, which in its turn can be classified according to the printing system used (impact head, ink-jet head, thermal head etc.); further details and/or classification of the printers and/or writing heads will be omitted in the present specification because they are not pertinent to the present invention.
For the same reason, in the present specification only ink-jet writing heads (and, in particular, three-colour ink-jet writing heads) will be discussed, omitting the other functional unities which constitute a printer.
Some three-colour ink-jet writing heads includes a fourth tank containing a black ink.
A multicolour ink-jet writing head comprises at least three tanks, each of which contains an ink of different colour (green, red, blue and black, if any) and printing means driven by the logical unit of the printer, which in turn may be drived by an upper logical unit, if any; said printing means takes each of said inks from the relevant tank for jetting ink micro drops on a backing (normally but not necessarily of paper) in order to realise the written and/or graphical text as requested.
An ink-jet writing head (and, in particular, a multicolour ink-jet writing head) is expensive because the printing means is realised through advanced constructive processes and by using materials having particular physical and chemical features carefully checked.
Although the producers define this ink-jet writing head as a "disposable" one, it will be apparent that it is uneconomical to replace and to expel a working ink-jet writing head only because one or more of the inks loaded by the producer into the tanks of the ink-jet writing head are exhausted.
The producers widely demonstrated that, utilising inks appropriately designed for said particular use, it is possible to extend the useful life of an ink-jet writing head beyond the exhaustion of the original ink charge.
There are present on the market many re-loading devices developed by the producers of printing fittings which allow re-loading once or more times a one-colour or a multicolour ink-jet writing head. The entrance to a tank which is inside the ink-jet writing head can be obtained either by removal of the means, if any, used by the producer for closing the hole used for the first loading of the relevant ink (green, red, blue or black), or by realising a proper hole on the ink-jet writing head covering.
Re-loading devices consisting of coverings (simple syringes, rubber syringes, bellows syringes, etc.) containing an ink, providing different shapes and/or dimensions and being of a low ergonomic level are known, for example, from U.S. Pat. No. 5,199,470; therefore, the user must
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patent: 5906143 (1999-05-01), Yuen
patent: 6053604 (2000-04-01), Sato et al.
B.M.S. Costruzione Stampi s.r.l.
Le N.
Nguyen Judy
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