摘要:
Low acoustic solid wave attenuation structures are formed with an electroformed nickel mold, and are incorporated within acoustic ink emitters, between the focusing lens and surface of an ink layer. The structures have characteristics of low attenuation of acoustic waves to increase the efficiency of acoustic wave transmission within the acoustic ink emitter. Using the described structures, acoustic ink printers can accurately emit materials having high viscosity, including hot melt inks.
摘要:
An ink-jet recording apparatus according to the present invention, which records an image onto a recording medium by flying an ink-droplet from a surface of an ink by a pressure of ultrasonic beam, is characterized by comprising ultrasonic generating element array (10) which has a plurality of ultrasonic elements arranged in array for emitting ultrasonic beams; driving means (21) for applying a plurality of pulses having different phases each other to converging ultrasonic beams by interfering the plurality of ultrasonic beams with each other emitted from the ultrasonic generating elements of a part of the ultrasonic generating element array (10), which are simultaneously driven, with sequentially shifting the ultrasonic generating elements simultaneously driven to an array direction, and converging means (16) for converging each of the plurality of ultrasonic beams in a direction of perpendicular to the array direction.
摘要:
Droplet ejector apparatus (10) having a plurality of droplet ejecting ports (26) capable of ejecting ink droplets (16) onto a recording medium (18) and having a capping structure (12) that alleviates debris contamination. The capping structure (12) includes a plurality of openings (14), some of which allow ejected droplets (16) to pass onto the recording medium (18). The capping structure (12) is removably spaced above a channel plate (24) of the droplet ejector (10) using spacers (34) which mate with other openings (14) in the capping structure (12) and with indentations (32) in the channel plate (24).
摘要:
An electric field is formed between an ink jet recording head (11) and a recording medium (20) on a platen (21) so that a certain intensity of force effective in the direction orientating toward the recording medium (20) is applied to an ink droplet in the presence of the electric field. Whereby, the ejected ink droplet is prevented from being shot onto a dislocated position from a normal position.
摘要:
An acoustic ink printhead (10) employing a flowing stream of ink past the ejectors to maintain a fresh ink supply at the ejector sites. An aperatured plate-like member (20) aligned with the ejector sites suppresses sideways droplet ejection components. A secondary pressure field using acoustic pulses or a pulsed heater provides dynamic liquid level control in addition to controlled switching of the ink droplets.
摘要:
In response to the foregoing need, the cap structures (31) that are provided by this invention for controlling the free ink surface levels (13) of acoustic ink printers (11) are characterized by having aperture configurations (42,52) that are more or less equally subdivided into "reflectively balanced" sectors that radially differ from each other by ¼ of the dominant wavelength of the surface ripple waves that are generated by the droplet ejection process (12). The ½ wavelength difference in the radii of the two generally equal reflectively balanced fractional parts of these apertures (42,52) causes the dominant frequency components of the retroreflected ripple waves to destructively interfere with each other in the critical central regions of the apertures.
摘要:
A nozzleless droplet projection system is disclosed. A thin film of fluid (26) with a constant thickness travels at a constant velocity across a tubular transducer head (16a, 16b). A smooth perimetrical surface (18) is formed between the input (22) and the output (24) sides of the transducer head (16a, 16b). An array of electro-acoustic transducers (15) submerged beneath the transducer head support surface (17) generate tone bursts (20, Figs 3 and 4) of acoustic energy which are focused by a corresponding array of acoustic lenses (19) inscribed along the length of the transducer head (16a, 16b). The constant thickness and constant velocity fluid film (26) is generated by forcing pre-regulated, pressurized fluid through a narrow slit (30) and across the smooth perimetrical surface (18) of the transducer head (16a, 16b). The fluid film (26) is maintained at the acoustic focus of the lenses (19) in order to control the resultant droplet (12) size. A pattern of droplets (12) is ejected by pulsing the appropriate electro-acoustic transducers (15) as the projection medium (14) is moved across the droplet formation apparatus at a constant velocity.