Firing chamber configuration in fluid ejection devices
First Claim
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1. An ink-jet printhead comprising:
- a substrate;
a first firing chamber and a second firing chamber on the substrate, both chambers being configured for receiving ink that flows into the chambers;
a heat transducer located within the first firing chamber, and a heat transducer located within the second firing chamber;
wherein the first and second firing chambers are in fluid communication to permit ink to flow through the first firing chamber and into the second firing chamber.
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Abstract
An ink-jet printhead is designed with different sets of firing chamber configurations on the same printhead. One set of firing chambers provides for relatively large-volume drops and rapid refill times to facilitate draft-mode printing. A second set of firing chambers provides smaller drop volumes and more controlled refill rates that are optimized for high-quality printing.
41 Citations
21 Claims
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1. An ink-jet printhead comprising:
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a substrate;
a first firing chamber and a second firing chamber on the substrate, both chambers being configured for receiving ink that flows into the chambers;
a heat transducer located within the first firing chamber, and a heat transducer located within the second firing chamber;
whereinthe first and second firing chambers are in fluid communication to permit ink to flow through the first firing chamber and into the second firing chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of configuring firing chambers on the substrate of an ink-jet printhead, wherein the printhead has a slot from which ink flows through channels and into each of the firing chambers for expulsion therefrom by a heat transducer located in each chamber, comprising the steps of:
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locating a first firing chamber on the substrate at a first position relative to the slot;
locating a second firing chamber on a substrate at a second position that is farther from the slot than the first position;
sizing the second firing chamber to be smaller than the first firing chamber; and
sizing the channels so that the rate of ink flow into the first firing chamber is greater than the rate of ink flow into the second firing chamber. - View Dependent Claims (10, 11, 12)
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13. A method of configuring firing chambers on the substrate of an ink-jet printed, wherein the printhead has a slot from which ink flows through channels and into each of the filing chambers for expulsion therefrom by a heat transducer located in each chamber, comprising the steps of:
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locating a first firing chamber on the substrate at a first position relative to the slot;
locating a second firing chamber on a substrate at a second position that is farther from the slot than the first position;
sizing, the channels so that the rate of ink flow into the first firing chamber is greater than the rate of ink flow into the second firing chamber;
providing a heat transducer in the first firing chamber and providing a heat transducer in the second firing chamber, the heat transducers being operable at different frequencies thereby to permit selection of a fast print mode and a slower print mode for ejecting drops of ink from the firing chambers; and
connecting separate conductive members to each heat transducer thereby to permit independent operation of the two heat transducers. - View Dependent Claims (14)
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15. An ink-jet printhead for ejecting ink drops onto adjacent media, comprising:
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a substrate having an edge across which ink flows; and
a first firing chamber and a second firing chamber on the substrate, each chamber configured for receiving a volume of ink to be expelled therefrom by a heat transducer, wherein the first firing chamber is larger than the second firing chamber and wherein the first firing chamber is closer to the edge than is the second firing chamber. - View Dependent Claims (16, 17, 18, 19)
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20. A method of configuring firing chambers on the substrate of a fluid ejection device, wherein the substrate has a slot from which fluid flows through channels and into each of the firing chambers for expulsion therefrom by a heat transducer located in each chamber, comprising the steps of:
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locating a first firing chamber on the substrate at a first position relative to the slot;
locating a second firing chamber on a substrate at a second position that is farther from the slot than the first position;
sizing the second firing chamber to be smaller than the first firing chamber; and
sizing the channels so that the rate of fluid flow into the first firing chamber is greater than the rate of fluid flow into the second firing chamber.
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21. A method of configuring firing chambers on the substrate of a fluid ejection device, wherein the substrate has a slot from which fluid flows through channels and into each of the firing chambers for expulsion therefrom by a heat transducer located in each chamber, comprising the steps of:
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locating a first firing chamber on the substrate at a first position relative to the slot;
locating a second firing chamber on a substrate at a second position that is farther from the slot than first position;
sizing the channels so that the rate of fluid flow into the first firing chamber is greater than the rate of fluid flow into the second firing chamber;
providing a heat transducer in the first firing chamber and providing a heat transducer in the second firing chamber, the heat transducers being operable at different frequencies thereby to permit selection of a first mode for ejecting drops of fluid from the firing chambers and a slower, second mode for ejecting drops of fluid from the firing chambers; and
connecting separate conductive members to each heat transducer thereby to permit independent operation of the two heat transducers.
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Specification