Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1982-09-07
1984-12-25
Hartary, Joseph W.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346140R, G01D 1518
Patent
active
044907281
ABSTRACT:
A thermal ink jet printer is disclosed in which ink droplets are ejected from an orifice by the explosive formation of a vapor bubble within the ink supply due to the application of a two part electrical pulse to a resistor within the ink supply. The electrical pulse comprises a precurser pulse and a nucleation pulse; the precurser pulse preheats the ink in the vicinity of the resistor to a temperature below the boiling temperature of the ink so as to preheat the ink while avoiding vapor bubble nucleation within the ink supply and the subsequently occuring nucleation pulse very quickly heats the resistor to near the superheat limit of the ink.
REFERENCES:
patent: 2556550 (1951-06-01), Murray
patent: 3747120 (1973-07-01), Stemme
patent: 4021818 (1977-05-01), Van Vloten
patent: 4243994 (1981-01-01), Kobayashi
patent: 4251824 (1981-02-01), Hara
patent: 4296421 (1981-10-01), Hara
patent: 4313124 (1982-01-01), Hara
patent: 4313684 (1982-02-01), Tazaki
Cloutier Frank L.
Donald David K.
Meyer John D.
Tacklind Christopher A.
Taub Howard H.
Hartary Joseph W.
Hewlett--Packard Company
Kundrat Douglas A.
Smith Joseph H.
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