Cartridge for supplying liquid to a print head

Details Cartridge for supplying liquid to a print head Cartridge for supplying liquid to a print head

1996-07-24

1998-10-13

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

B41J 2175

Patent

active

058219641

ABSTRACT:
A cartridge of the type used with a printer is provided for supplying liquid to the printer. The cartridge includes a container that has first through sixth walls and a partition in the form of an inner wall that substantially divides the container into first and second compartments. The partition extends from the third wall to near the fourth wall to form a communication gap between the partition and the fourth wall. The container also has a first opening in the first compartment for allowing air to enter, and a second opening in the first compartment for interfacing with the printer's print head. A stranded material is disposed in the first compartment so that it extends along the first partition to a location between the end of the first partition and the fourth wall. A foam material is disposed in and substantially fills the remainder of the first compartment. The stranded material functions to regulate the internal pressure of the cartridge by selectively providing a low resistance path for air to pass from the first compartment, through the stranded material and the gap, and into the second compartment. This allows the cartridge to supply ink to the print head while keeping the pressure in the cartridge, and thus the vacuum in the print head, substantially constant.

REFERENCES:
patent: 4771295 (1988-09-01), Baker et al.
patent: 5262802 (1993-11-01), Karita et al.
patent: 5509140 (1996-04-01), Koitabashi et al.

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