Ink supply device ink jet printer and ink supply method

Details Ink supply device ink jet printer and ink supply method Ink supply device ink jet printer and ink supply method

1997-07-02

1998-06-02

Le, N.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

B41J 2175

Patent

active

057608067

ABSTRACT:
An ink supply device for use in an ink jet printer comprising a main ink chamber in communication through a communication hole with a sub-ink chamber containing an ink absorbing member therein. A meniscus film forming member covering the communication hole and communicating the main ink chamber with the sub-ink chamber; the member having a first surface facing the interior of the main ink chamber and an opposite second surface. An ink guide member extending into a lower portion of the main chamber and also being in contact with the first surface of the film forming member, wherein as ink in the main ink chamber is consumed a differential pressure between the first and second surfaces of the film forming member causes a gradual expansion of a liquid meniscus film into an air bubble on the film forming member to maintain a constant negative pressure in the main ink chamber.

REFERENCES:
patent: 3967286 (1976-06-01), Andersson et al.
patent: 4719479 (1988-01-01), Kyogoko
patent: 4994824 (1991-02-01), Winslow
patent: 5409138 (1995-04-01), Nakano

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