Leak resistant ink containment for a printer
AssigneeHewlett-Packard Company
InventorsJoseph R. Elliot, J. Paul Harmon, Naoto Kawamura, John M. Altendorf
Life of this patent
Estimating the term…
Abstract
In order that ink leakage be reduced from a compressed foam storage ink container for an inkjet printer cartridge, at least one of the walls of the container is provided relief pockets having air spaces free of the compressed foam. At least one vent channel communicates between relief pockets and ambient air pressure to provide pressure equilibrium.
Claims13
An ink container for an inkjet cartridge comprising:
- an ink inlet disposed near a first end of the ink container;
- a first wall and a second wall disposed opposite each other and said first wall and said second opposing wall extending between said first end and a second end of the ink container;
- a porous member disposed between and compressed by said first wall and said second opposing wall and extending from said first end towards said second end;
- a plurality of relief pockets each comprising a slot disposed essentially perpendicular to a direction from said first end to said second end and disposed in a surface of said first wall, each of said relief pockets having a bottom which is recessed from said surface of said first wall by a depth such that said compressed porous member does not touch said bottom in substantially all of said plurality of relief pockets;
- and
- at least one vent channel communicating with at least a portion of said plurality of relief pockets and extending essentially in said direction from said first end toward said second end.
A method of reducing ink leakage from an ink container for an inkjet print cartridge comprising the steps of:
- disposing a first wall and a second wall of the ink container opposite each other and extending between a first end of the ink container having an ink inlet and a second end of the ink container;
- compressing a porous member between said first wall and second opposing wall of the ink container;
- providing a plurality of relief pockets offering fluid communication substantially perpendicular to a direction from said first end to said second end in a surface of said first wall;
- recessing a bottom of each of said relief pockets from said surface of said first wall to a depth such that said compressed porous member does not touch said bottom in substantially all of said plurality of relief pockets;
- and
- coupling at least a portion of said plurality of relief pockets with a vent channel whereby air will move between said relief pockets and said vent channel.
An ink container for an inkjet cartridge comprising:
- an ink inlet disposed near a first end of the ink container;
- a first wall and a second wall disposed opposite each other and said first wall and said second opposing wall extending between said first end and a second end of the ink container;
- a porous member disposed between and compressed by said first wall and said second opposing wall and extending from said first end towards said second end;
- a plurality of relief pockets disposed in a surface of said first wall, each of said relief pockets comprising a first depression coupled to a second neighboring depression by a slot oriented essentially perpendicular to a direction from said first end to said second end and disposed in said surface of said first wall, each of said relief pockets having a bottom which is recessed from said surface of said first wall by a depth such that said compressed porous member does not touch said bottom in substantially all of said plurality of relief pockets;
- and
- at least one vent channel communicating with at least a portion of said plurality of relief pockets and extending essentially in said direction from said first end toward said second end.
An ink container for an inkjet print cartridge comprising:
- an ink inlet disposed near a first end of the ink container;
- a first wall and a second wall disposed opposite each other and said first wall and said second opposing wall extending between said first end and a second end of the ink container;
- a porous member disposed between and compressed by said first wall and said second opposing wall and extending from said first end towards said second end;
- a plurality of relief pockets disposed in a surface of said first wall and each of said relief pockets having a bottom which is recessed from said surface of said first wall by a depth such that said compressed porous member does not touch said bottom in substantially all of said plurality of relief pockets;
- and
- a plurality of vent channel portions connecting at least some of said plurality of relief pockets such that no direct vertical connection between said first end and second end of said ink container is formed.
Dependencies are inferred from the claim text.