INK EJECTION NOZZLE WITH OSCILLATOR AND SHUTTER ARRANGEMENT

• US 20080303875A1
• Filed: 08/16/2007
• Published: 12/11/2008
• Est. Priority Date: 07/15/1997
• Status: Active Grant

• Current Assignee: Zamtec Limited (Memjet Limited)
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Silverbrook, Kia
• Granted Patent: US 7,753,485 B2
• Time in Patent Office: Days
• US Class Current: 347/68
• CPC Class Codes: B41J 11/0005 Curl smoothing, i.e. smoothing down corrugated printing material, e.g. by pressing means acting on wrinkled printing material
• CPC Class Codes: B41J 2/14427 Structure of ink jet print heads with thermal bend detached actuators
• CPC Class Codes: B41J 2/1623 bonding and adhesion
• CPC Class Codes: B41J 2/1626 etching
• CPC Class Codes: B41J 2/1628 dry etching
• CPC Class Codes: B41J 2/1629 wet etching
• CPC Class Codes: B41J 2/1631 photolithography
• CPC Class Codes: B41J 2/1632 machining
• CPC Class Codes: B41J 2/1635 dividing the wafer into individual chips
• CPC Class Codes: B41J 2/1637 molding
• CPC Class Codes: B41J 2/1639 sacrificial molding
• CPC Class Codes: B41J 2/1642 thin film formation by CVD [chemical vapor deposition]
• CPC Class Codes: B41J 2/1643 thin film formation by plating
• CPC Class Codes: B41J 2/1645 thin film formation by spincoating
• CPC Class Codes: B41J 2/1646 thin film formation by sputtering
• CPC Class Codes: B41J 2/1648 Production of print heads with thermal bend detached actuators
• CPC Class Codes: B41J 2/16585 for paper-width or non-reciprocating print heads
• CPC Class Codes: B41J 2/175 Ink supply systems ; Circuit parts therefor
• CPC Class Codes: B41J 2/17503 Ink cartridges
• CPC Class Codes: B41J 2/17513 Inner structure
• CPC Class Codes: B41J 2/17596 : Ink pumps, ink valves
• CPC Class Codes: B41J 2002/041 : Electromagnetic transducer
• CPC Class Codes: B41J 2202/21 : Line printing
• CPC Class Codes: B82Y 30/00 : Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: G06F 21/79 : in semiconductor storage media, e.g. directly-addressable memories
• CPC Class Codes: G06F 21/86 : Secure or tamper-resistant housings
• CPC Class Codes: G06F 2221/2129 : Authenticate client device independently of the user
• CPC Class Codes: G06K 1/121 : by printing code marks applying code marks to labels B65C9/46; marking or coding completed packages B65B61/26
• CPC Class Codes: G06K 19/06037 : multi-dimensional coding
• CPC Class Codes: G06K 7/14 : using light without selection of wavelength, e.g. sensing reflected white light G06K7/10831 - G06K7/1097 take precedence
• CPC Class Codes: G06K 7/1417 : 2D bar codes
• CPC Class Codes: G11C 11/56 : using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
• CPC Class Codes: H04N 1/2112 : using still video cameras
• CPC Class Codes: H04N 1/2154 : the still video camera incorporating a hardcopy reproducing device, e.g. a printer
• CPC Class Codes: H04N 2101/00 : Still video cameras
• CPC Class Codes: H04N 23/00 : Cameras or camera modules comprising electronic image sensors; Control thereof
• CPC Class Codes: H04N 5/2628 : Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation
• CPC Class Codes: H04N 5/7458 : the modulator being an array of deformable mirrors, e.g. digital micromirror device [DMD]
• CPC Class Codes: Y10S 977/932 : for electronic or optoelectronic application

Abstract

An ink ejection nozzle has an ink reservoir with an oscillator configured to oscillate ink pressure in the reservoir. A wafer assembly defines an ink supply channel in fluid communication with the ink reservoir. A nozzle chamber structure on the wafer assembly defines a nozzle chamber in fluid communication with the ink supply channel. An ink ejection port is in fluid communication with the nozzle chamber. A shutter is positioned in the nozzle chamber and is configured to shut the ink ejection port to the ejection of ink from the nozzle chamber.

Claims

1. An ink ejection nozzle comprising:

an ink reservoir with an oscillator configured to oscillate ink pressure in the reservoir;

a wafer assembly defining an ink supply channel in fluid communication with the ink reservoir;

a nozzle chamber structure on the wafer assembly and defining a nozzle chamber in fluid communication with the ink supply channel, and an ink ejection port in fluid communication with the nozzle chamber; and

a shutter positioned in the nozzle chamber and configured to shut the ink ejection port to the ejection of ink from the nozzle chamber.

2. An ink ejection nozzle as claimed in claim 1, wherein the oscillator includes an ultrasonic transducer.

3. An ink ejection nozzle as claimed in claim 2, wherein the ultrasonic transducer includes a piezoelectric transducer.

4. An ink ejection nozzle as claimed in claim 1, wherein the wafer assembly includes:

a silicon wafer;

a CMOS layer positioned on the silicon wafer; and

a protective passivation layer positioned on the CMOS layer.

5. An ink ejection nozzle as claimed in claim 1, wherein the shutter is moved by a thermoelastic actuator having a coiled serpentine heater.

6. An ink ejection nozzle as claimed in claim 5, wherein the heater is embedded in polytetrafluoroethylene (PTFE).

7. An ink ejection nozzle as claimed in claim 1, wherein a raised nozzle rim bounds the ink ejection port.