Back to results
US 12,485,674 B2Granted
Liquid ejection head
AssigneeRISO Technologies Corporation
InventorTetsuya Sato
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a liquid ejection head includes an actuator with pressure chambers, a first common chamber on a first side of the pressure chambers, a second common chamber on a second side of the pressure chambers, and a manifold providing a first liquid flow path above the first common chamber, a first cooling flow path above the second common chamber, and a second liquid flow path above the first cooling flow path. The second liquid flow path is connected to the first liquid flow path by a confluence portion at a confluence position between a first end of the first liquid flow path and a midpoint of the first liquid flow path.
Claims21
A liquid ejection head, comprising:
- a nozzle plate including a plurality of nozzles arranged in a row along a first direction;
- an actuator including a plurality of pressure chambers, each pressure chamber being associated with a respective nozzle of the nozzle plate, the pressure chambers extending lengthwise in a second direction intersecting the first direction;
- a first common chamber on a first side of the plurality of pressure chambers and extending lengthwise along the first direction;
- a second common chamber on a second side of the plurality of pressure chambers and extending lengthwise along the first direction, the plurality of pressure chambers being between the first and second common chambers in the second direction;
- and
- a manifold on a surface of the actuator and forming a first liquid flow path above the first common chamber in a third direction and extending lengthwise along the first direction, a first cooling flow path above the second common chamber in the third direction and extending lengthwise along the first direction, and a second liquid flow path above the first cooling flow path in the third direction and extending lengthwise in the first direction, the second liquid flow path being connected to the first liquid flow path by a confluence portion at a confluence position between a first end of the first liquid flow path in the first direction and a midpoint of the first liquid flow path along the first direction.
3 more elements
A liquid ejection head, comprising:
- a first head body;
- a nozzle plate including a plurality of nozzles arranged in two rows along a first direction, the two rows being spaced from each other in a second direction;
- a first actuator on the first head body and including a first plurality of pressure chambers, each pressure chamber of the first plurality of pressure chambers being associated with a respective nozzle of the nozzle plate in a first row, the pressure chambers of the first plurality extending lengthwise in the second direction;
- a second actuator on the first head body and including a second plurality of pressure chambers, each pressure chamber of the second plurality of pressure chambers being associated with a respective nozzle of the nozzle plate in a second row, the pressure chambers of the second plurality extending lengthwise in the second direction;
- a first common chamber on a first side of the first plurality of pressure chambers and extending lengthwise along the first direction, the first common chamber being between the first and second actuators in the second direction;
- a second common chamber on a second side of the first plurality of pressure chambers and extending lengthwise along the first direction, the first plurality of pressure chambers being between the first and second common chambers in the second direction;
- and
- a manifold on a surface of the first head body and forming a first liquid flow path above the first common chamber in a third direction and extending lengthwise along the first direction, a first cooling flow path above the second common chamber in the third direction and extending lengthwise along the first direction, and a second liquid flow path above the first cooling flow path in the third direction and extending lengthwise in the first direction, the second liquid flow path being connected to the first liquid flow path by a confluence portion at a confluence position between a first end of the first liquid flow path in the first direction and a midpoint of the first liquid flow path along the first direction.
5 more elements
An image forming apparatus, comprising:
- a liquid supply tank;
- and
- a liquid ejection head connected to the liquid supply tank, the liquid ejection head including:
- a nozzle plate including a plurality of nozzles arranged in a row along a first direction;
- an actuator including a plurality of pressure chambers, each pressure chamber being associated with a respective nozzle of the nozzle plate, the pressure chambers extending lengthwise in a second direction intersecting the first direction;
- a first common chamber on a first side of the plurality of pressure chambers and extending lengthwise along the first direction;
- a second common chamber on a second side of the plurality of pressure chambers and extending lengthwise along the first direction, the plurality of pressure chambers being between the first and second common chambers in the second direction;
- and
- a manifold on a surface of the actuator and forming a first liquid flow path above the first common chamber in a third direction and extending lengthwise along the first direction, a first cooling flow path above the second common chamber in the third direction and extending lengthwise along the first direction, and a second liquid flow path above the first cooling flow path in the third direction and extending lengthwise in the first direction, the second liquid flow path being connected to the first liquid flow path by a confluence portion at a confluence position between a first end of the first liquid flow path in the first direction and a midpoint of the first liquid flow path along the first direction.
6 more elements
Dependencies are inferred from the claim text.