Back to results
US 9,849,681 B2Granted
Structure for printhead having multiple air channels
AssigneeHewlett-Packard Development Company, L.P.
InventorsIain Campbell-Brown, Eugene Cahill, Ivor Cummins, William Jon Rittgers
Life of this patent
Estimating the term…
Abstract
A structure comprises inlets through which respective liquids are to be introduced and multiple unique vent paths each corresponding to one of the inlets.
Claims19
A structure for supporting a printhead, comprising:
- a substrate having a first side and a second side;
- multiple inlet towers on the first side of the substrate, through which respective liquids are to be introduced into the structure, each tower corresponding to a different liquid;
- multiple holes through the substrate, each near a respective inlet tower;
- and
- multiple separate elongate air channels along the second side of the substrate connected to the respective holes on one end and communicating with ambient air on another end;
- wherein each of the inlet towers is associated with a unique one of the air channels;
- and
- a first one of the air channels includes a side slot extending along a length of the first air channel, a depth of the side slot being smaller than a depth of the first air channel.
5 more elements
A structure for supporting a printhead, comprising:
- a substrate having a first side and a second side;
- multiple inlet towers on the first side of the substrate, through which respective liquids are to be introduced into the structure, each tower corresponding to a different liquid;
- multiple holes through the substrate, each near a respective inlet tower;
- and
- multiple separate elongate air channels along the second side of the substrate connected to the respective holes on one end and communicating with ambient air on another end, each of the inlet towers associated with a unique one of the air channels, wherein each of the air channels is defined by a unique elongate labyrinth to allow venting while preventing water vapor loss, each of the labyrinths having a length of at least 50 millimeters.
2 more elements
A structure for a printhead assembly, comprising:
- a printhead to dispense liquid;
- multiple liquid inlets to receive liquid from a detachable liquid container;
- a liquid manifold to distribute liquid from the liquid inlets to the printhead;
- and
- multiple unique air channels, each of the air channels associated with only one of the liquid inlets to vent a corresponding liquid container to the atmosphere when the corresponding liquid container is attached to the liquid inlet, each of the air channels including a first portion and a second portion, each of the air channels including a recess on a bottom of the corresponding first portion to trap liquid, a bottom surface of the recess lower than a bottom surface of the corresponding second portion of each of the air channels.
2 more elements
A structure for a printhead assembly, comprising:
- a printhead to dispense liquid;
- multiple liquid inlets to receive liquid from a detachable liquid container;
- a liquid manifold to distribute liquid from the liquid inlets to the printhead;
- and
- multiple unique air channels, each of the air channels associated with only one of the liquid inlets to vent a corresponding liquid container to the atmosphere when the corresponding liquid container is attached to the liquid inlet, wherein each of the air channels is defined by a unique elongate labyrinth that makes at least five turns of at least 90 degrees, having a length of at least 50 millimeters.
2 more elements
Dependencies are inferred from the claim text.