Solenoid actuated magnetic plate ink jet printing mechanism
First Claim
1. An ink jet print head for ejection of ink from an ink ejection nozzle comprising:
- a substrate;
a conductive coil formed on said substrate and operable in a controlled manner;
a moveable magnetic actuator surrounding said conductive coil and forming an ink nozzle chamber between said substrate and said actuator, said moveable magnetic actuator further having said ink ejection nozzle defined therein;
wherein variations in an energization level of said conductive coil cause said magnetic actuator to move from a first position to a second position, thereby causing a consequential ejection of ink from said nozzle chamber as a result of fluctuations in ink pressure within said nozzle chamber.
2 Assignments
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Accused Products
Abstract
An ink jet printhead for the ejection of ink from an ink ejection nozzle includes: a substrate; a conductive coil formed on the substrate and operable in a controlled manner, a moveable magnetic actuator surrounding the conductive coil and forming an ink nozzle chamber between the substrate an, the actuator, the moveable magnetic actuator further including an ink ejection nozzle defined therein; wherein variations in the energization level of the conductive coil cause the magnetic actuator to move from a first position to a second position, thereby causing a consequential ejection of ink from the nozzle chamber as a result of fluctuations in the ink pressure within the nozzle chamber. The arrangement can further include an ink supply channel interconnecting the nozzle chamber supplying ink to the nozzle chamber. The interconnection can include a series of elongated slots etched in the substrate. The substrate can include a silicon wafer and the ink supply channel can be etched through the wafer.
8 Citations
11 Claims
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1. An ink jet print head for ejection of ink from an ink ejection nozzle comprising:
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a substrate;
a conductive coil formed on said substrate and operable in a controlled manner;
a moveable magnetic actuator surrounding said conductive coil and forming an ink nozzle chamber between said substrate and said actuator, said moveable magnetic actuator further having said ink ejection nozzle defined therein;
wherein variations in an energization level of said conductive coil cause said magnetic actuator to move from a first position to a second position, thereby causing a consequential ejection of ink from said nozzle chamber as a result of fluctuations in ink pressure within said nozzle chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
at least one resilient member attached to said moveable magnetic actuator, so as to bias said moveable magnetic actuator, in its quiescent position, at said first position.
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7. An ink jet print head as claimed in claim 6 wherein said at least one resilient member comprises a leaf spring.
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8. An ink jet print head as claimed in claim 1 wherein a slot is defined between said magnetic actuator and said substrate and actuator portions adjacent said slot are hydrophobically treated so as minimize wicking through said slot.
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9. An ink jet print head as claimed in claim 1 further comprising a magnetic base plate located between said conductive coil and said substrate.
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10. An ink jet print head as claimed in claim 9 wherein said magnetic actuator and said base plate substantially encompasses said conductive coil.
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11. An ink jet pint bead as claimed in claim 1 wherein said magnetic actuator is formed from a cobalt nickel iron alloy.
Specification