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- Patents > 2007-08-30 > SECTION B PERFORMING OPERATIONS; TRANSPORTING > PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS > TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
INKJET PRINTHEAD WITH LOW VOLTAGE INK VAPORIZING HEATERS
There is disclosed an ink jet printhead which comprises a plurality of nozzles and one or more heater elements 10 corresponding to each nozzle. Each heater element 10 is configured to heat a bubble forming liquid 11 in the printhead to a temperature above its boiling point to form a gas bubble 12 therein. The generation of the bubble 12 causes the ejection of a drop of an ejectable liquid (such as ink) through an ejection aperture 5 in each nozzle, to effect printing. In each nozzle, the heater element 10 requires an electrical pulse with a voltage less than 10 volts and a duration less than 1.5 microseconds, to form the vapor bubble that causes the ejection of the drop. With the realization that drive pulse voltages above, say, 12 volts are not a fixed parameter of printhead design, the benefits of low voltage printhead operation can be incorporated into a design that yields efficiencies that negate the circumstances that created the initial demand for high voltage operation.
Filed on: 2007-05-07; Application Number: 11744885