Recorders – Record receiver deforming
Patent
1986-05-01
1987-01-20
Goldberg, E. A.
Recorders
Record receiver deforming
346140R, G01D 1518
Patent
active
046383280
ABSTRACT:
A continuous stream type ink jet printhead utilizing constant thermal pulses to perturbate the ink streams emitted through a plurality of nozzles to break up the ink streams into droplets at a fixed distance from the nozzles whereat the drops are individually charged by a charging electrode in accordance with digitized data signals. Each printhead has a manifold, a plurality of ink channels communicating at one end with the manifold and terminating at the other end with nozzles, and at least one resistor addressed by a predetermined frequency of current pulses for applying thermal pulses to the ink. In one embodiment, a resistor is positioned in each of the channels adjacent the nozzles and in another embodiment, a single resistor is located in the ink manifold. The resistors are pulsed at low power to generate a perturbation of ink properties such as density, viscosity, or surface tension without producing a phase change in the ink.
REFERENCES:
patent: 3731876 (1973-05-01), Showalter
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patent: 3878519 (1975-04-01), Eaton
patent: 3943525 (1976-03-01), Skala
patent: 4128345 (1978-12-01), Brady
patent: 4220958 (1980-09-01), Crowley
patent: 4312008 (1982-01-01), Taub et al.
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Drake Donald J.
Hawkins William G.
LaDonna Richard V.
Markham Roger G.
Chittum Robert A.
Goldberg E. A.
Preston Gerald E.
Xerox Corporation
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