摘要:
An ink jet printhead chip includes a wafer substrate. Drive circuitry is positioned on the wafer substrate. A plurality of nozzle arrangements is positioned on the wafer substrate. Each nozzle arrangement includes nozzle chamber walls and a roof wall positioned on the wafer substrate to define a nozzle chamber and an ink ejection port in the roof wall. A micro-electromechanical actuator is connected to the drive circuitry. The actuator includes a movable member that is displaceable on receipt of a signal from the drive circuitry. The movable member defines a displacement surface that acts on ink in the nozzle chamber to eject the ink from the ink ejection port. An area of the displacement surface is between half and twice a cross sectional area of the ink ejection port.
摘要:
A nozzle arrangement for an ink jet printhead includes a wafer substrate having a nozzle chamber defined therein. The nozzle arrangement has a nozzle chamber wall that defines an ink ejection port and a rim about the ink ejection port. A series of radially positioned actuators are connected to the wafer substrate and extend radially inwardly towards the rim. Each actuator is configured so that a radially inner edge of each actuator is displaceable, with respect to the nozzle rim, into the chamber, upon actuation of the actuator and so that, upon such displacement, a pressure within the nozzle chamber is increased, resulting in the ejection of ink from the ejection port.
摘要:
A fluid ejecting device includes a substrate containing drive circuitry. Nozzle chamber walls and a roof wall are positioned on the substrate to define a nozzle chamber in which fluid is received and a fluid ejection port from which the fluid is ejected, in use. A fluid ejecting mechanism is operatively arranged with respect to the nozzle chamber to act on the fluid in the nozzle chamber to eject fluid from the fluid ejection port. A thermal bend actuator is connected to the drive circuitry to receive an electrical signal from the drive circuitry and to provide actuation of the fluid ejecting mechanism. The thermal bend actuator has a laminated structure of at least three layers in the form of a pair of opposed, outer layers and at least one inner layer. The outer layers have substantially the same thermal expansion and elasticity characteristics.
摘要:
An ink jet printhead chip includes a wafer substrate. A CMOS drive circuitry layer is positioned on the wafer substrate. A plurality of nozzle arrangements is positioned on the wafer substrate and the CMOS drive circuitry layer. Each nozzle arrangement includes nozzle chamber walls and a roof wall that define a nozzle chamber and an ink ejection port defined in the roof wall. A micro-electromechanical actuator is connected to the CMOS drive circuitry layer. The actuator has at least one movable member that is positioned to act on ink in the nozzle chamber to eject the ink from the ink ejection port on receipt of a signal from the drive circuitry layer. The movable member is spaced between 2 microns and 15 microns from the CMOS drive circuitry layer.
摘要:
An ink jet printhead has a number of printhead chips. Each printhead chip has a wafer substrate. A plurality of nozzle arrangements is positioned on the wafer substrate. Each nozzle arrangement has nozzle chamber walls and a roof wall that define a nozzle chamber and a nozzle opening in fluid communication with the nozzle chamber. An actuator is operatively arranged with respect to each nozzle arrangement to eject ink from the nozzle chamber through the nozzle opening. A nozzle guard is positioned over the printhead chip. The nozzle guard has a support structure and a planar cover member. The planar cover member is positioned on the support structure. The planar cover member defines a plurality of passages. Each passage is in register with a respective nozzle opening. The planar cover member is less than 300 microns thick.
摘要:
A liquid-firing head includes a nozzle firing a liquid drop; a liquid chamber communicating with the nozzle; a vibration plate which acts as a wall of the liquid chamber; and an electrode facing the vibration plate. The vibration plate is deformed by an electrostatic force, and, thereby, the liquid drop is fired through the nozzle. A groove for forming a gap between the electrode and the vibration plate is formed in the electrode.
摘要:
An apparatus and method of fabricating a flextensional transducer capable of ejecting a flowable material is disclosed. The method of fabricating a flextensional transducer capable of ejecting a flowable material includes ultrasonically metal welding an actuator body having an outer diameter and an aperture to a transducer membrane having an outer diameter and an aperture. The transducer membrane is also ultrasonically metal welded to a gland or nozzle capable of housing a portion of the flowable material. The gland or nozzle includes a surface adjacent to the transducer membrane having an aperture. The outer diameter of the actuator body is smaller than the aperture of the gland or nozzle.
摘要:
A combined deflection electrode and phase sensor electrode for a deflection type ink jet printer is made up of a ceramic support plate 19, a conductive layer 21 acting as the deflection electrode, layers of insulator 25 covering the conductive layer 21, and a patch of conductive material on the layers of insulator 25 to provide a phase sensor electrode 29 (Alternative constructions are also disclosed). A time of flight sensor electrode 31 may also be provided in the same way. The layers of insulator 25 prevent the sensor electrodes 29, 31 from being electrically connected, by splashes of conductive ink, to the deflection electrode provided by the conductive layer 21. The sensor electrodes 29,31 can have a larger sensing area than separately provided electrodes, allowing them to be further from the ink jet and thereby easing alignment requirements. Additionally, the flight path of the ink jet from the nozzle 1 to the gutter 11 is shortened by placing the sensor electrodes 29, 31 within the length of the deflection electrode. The combined electrode design may be applied to single jet printers, double jet printers and printers having an array of jets (e.g. for printing graphics).
摘要:
A liquid drop emitter, such as an ink jet device, for emitting a series of liquid drops at high frequency is disclosed. The drop emitter comprises a liquid-filled chamber having a nozzle, a thermo-mechanical actuator for applying pressure to liquid at the nozzle, means for heating the thermo-mechanical actuator in response to electrical pulses, and a controller for determining the parameters of the electrical pulses. The method of operating comprises determining a nominal electrical pulse having a nominal energy E0, a nominal pulse duration TP0, which causes the emission of at least one drop at a sustained period of repetition TC. The method of operating further determines a steady state electrical pulse having energy E0, a steady state pulse duration TPss, which, when applied to the electroresistive means does not cause the emission or weeping of the liquid from the nozzle. The method applies to the means for heating, during every period of time TC, a nominal electrical pulse to emit at least one drop, or a steady state electrical pulse, so that an average power PAVE, where PAVE=E0/TC, is applied to the liquid drop emitter in order to maintain a steady state thermal condition.
摘要:
A micro electro-magnetic system includes a substrate. An actuator mechanism is arranged on the substrate. An actuator arm is displaceably mounted on the substrate and is displaceable with respect to the substrate along a predetermined path of travel. The actuator arm has a plurality of spaced magnetic poles along its length. An electromagnetic field generator is operatively positioned with respect to the actuator arm and is capable of producing an electromagnetic field of sufficient strength to interact with the spaced magnetic poles so that the actuator arm is displaced along the path of travel. A control system is provided for controlling operation of the electromagnetic field generator.