Inkjet head
AssigneeFuji Photo Film Co., Ltd.
InventorsTomohisa Shingai, Shuji Koike, Yoshiaki Sakamoto
Life of this patent
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Abstract
The ink replenishment frequency is increased in an inkjet head having nozzles for injecting ink. Independent dampers are provided in ink supply passages to impart an acoustic capacitance to the ink supply passages, and therefore a reciprocal action is generated between the pressure chambers and the ink supply passages, whereby the operation of ink replenishment can be stimulated. Accordingly, the ink replenishment frequency can be increased by a factor of approximately 3, without having to provide functional elements in the ink supply passage.
Claims8
An inkjet head for jetting ink from nozzles, comprising:
- pressure chambers communicating with said nozzles;
- energy generating sections for imparting ink jet energy to said pressure chambers;
- and
- supply passages for supplying ink from an ink chamber to said pressure chambers,
- wherein each of said supply passages comprises:
- an independent damper;
- a first ink supply passage connecting said independent damper with said pressure chamber;
- and
- a second ink supply passage connecting said independent damper with said ink chamber,
- wherein said independent damper has an acoustic capacitance approximately equal to that of the meniscus of said nozzle.
An inkjet head for jetting ink from nozzles, comprising:
- pressure chambers communicating with said nozzles;
- energy generating sections for imparting ink let energy to said pressure chambers;
- and
- supply passages for supplying ink from an ink chamber to said pressure chambers,
- wherein each of said supply passages comprises:
- an independent damper;
- a first ink supply passage connecting said independent damper with said pressure chamber;
- and
- a second ink supply passage connecting said independent damper with said ink chamber,
- wherein said independent damper has a structure wherein the ink chamber is covered by an elastic member.
Dependencies are inferred from the claim text.