Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1992-02-24
1993-06-29
Hartary, Joseph W.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346140R, B41J 205
Patent
active
052238539
ABSTRACT:
A system controls an ink jet printing apparatus for propelling ink jet droplets on demand from a printhead having a plurality of drop ejectors. In the printhead, each ejector includes a heating element actuable in response to electrical input signals, each input signal having an amplitude and a time duration, selectably applied to the heating element to produce a temporary vapor bubble and cause a quantity of ink to be emitted for the creation of a mark on a copy sheet. The temperature of ink in the printhead is sensed, and a combination of power level and time duration of the electrical input signal for the heating element to result in a desired size of the mark of the copy sheet is selected, by entering the sensed temperature of the ink into a predetermined function relating the energy of the electrical input signal to the corresponding resulting size of the mark on the copy sheet.
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World Patent Application No. 90/10541, Josef Poppel. "Process for Varying the Droplet Size in Ink Printers", Application Date: Jan. 26, 1990.
World Patent No. 90/10540, Siemens Aktiengesellschaft, "Process and Device for Optimizing Pressure Pulses in Ink Printers Operated by Thermal Converters", Application Date: Jan. 25, 1990.
Hawkins William G.
Kneezel Gary A.
LaDonna Richard V.
Stephany Joseph F.
Tellier Thomas A.
Hartary Joseph W.
Hutter R.
Xerox Corporation
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