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US 7,604,337 B2Granted
Inkjet head and inkjet recording device
AssigneeSii Printek Inc.
InventorOsamu Koseki
Life of this patent
Estimating the term…
Abstract
An inkjet head capable of achieving stable ejection of ink by preventing air bubbles from being left in the upstream side of a nozzle of a filter element such as mesh filter that is provided in an inkjet head owing to the efficient use of the open area of the filter element. The inkjet head is provided to have a fluid channel communicated with the atmosphere from the upstream side region of the filter element such as mesh filter, with regard to the nozzle without passing through the filter element and the nozzle.
Claims20
An inkjet head comprising:
- a plurality of channels in communication with respective nozzles;
- an ink chamber that supplies ink to each of the channels;
- an ink flow-channel in communication with the ink chamber;
- a filter element provided in the ink flow-channel;
- an atmosphere-communication channel having one end in communication with the ink flow-channel at a location upstream of the filter element and another end in communication with the atmosphere;
- and
- a vacuum pressure retaining system that is provided in the atmosphere-communication channel and that maintains a vacuum pressure prevailing in the ink flow-channel so that air bubbles in the ink flow-channel are discharged to the atmosphere through the atmosphere-communication channel and the vacuum pressure retaining system.
4 more elements
An inkjet head comprising:
- a plurality of channels communicating at one end thereof with respective nozzle openings;
- an ink chamber communicating with the channels for supplying ink to the channels;
- an ink flow channel having an inlet port for receiving ink and communicating with the ink chamber for delivering ink to the ink chamber;
- a filter disposed in the ink flow channel;
- an atmosphere-communication channel having one end connected to the ink flow channel at a location upstream of the filter and another end communicating with the atmosphere;
- and
- a vacuum pressure retaining unit disposed in the atmosphere-communication channel to maintain a vacuum pressure in the ink flow channel so that air bubbles present in the ink flow channel are discharged to the atmosphere through the atmosphere-communication channel and the vacuum pressure retaining unit.
4 more elements
Dependencies are inferred from the claim text.