Ink supply device

Details Ink supply device Ink supply device

1994-05-03

1997-05-27

Barlow, Jr., John E.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

B41J 2175

Patent

active

056336667

ABSTRACT:
An ink supply port to supply ink to a print head is formed on an ink tank, and a filter is provided along the inside surface of the ink tank with an ink foam member arranged therein. The ink foam member has a convex shaped portion where it confronts the filter. Thus, in operation, the convex portion is compressed and firmly contacts with the filter with a uniform pressure. The ink absorbed in the foam member is moved by capillary action from an uncompressed portion to a dense compressed portion of the foam member, which is the convex portion. Then, the ink absorbed in the foam member is transferred into a ink room provided in the ink tank by the capillary action of the filter. The ink is then supplied to the ink jet head through a hollow needle inserted into the ink room.

REFERENCES:
patent: 4095237 (1978-06-01), Amberntsson et al.
patent: 4368478 (1983-01-01), Koto
patent: 4771295 (1988-09-01), Baker et al.
patent: 4931811 (1990-06-01), Cowger et al.
patent: 5025271 (1991-06-01), Baker et al.
patent: 5155502 (1992-10-01), Kimura et al.
patent: 5156472 (1992-10-01), Suzuki et al.
patent: 5182579 (1993-01-01), Haruta et al.

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