Thermal drop-on-demand ink jet print head

Details Thermal drop-on-demand ink jet print head Thermal drop-on-demand ink jet print head

1987-06-12

1988-12-20

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

G01D 1518

Patent

active

047928182

ABSTRACT:
A thermal drop-on-demand ink jet print head in which a heat delay means is provided covering a predetermined part of the resistive element. Upon connection of an electrical signal to energize the resistive element, nucleation occurs at an uncovered location on the resistive element and formation of the bubble proceeds in a direction toward the covered part of the resistive element to thereby utilize the inertial effect of the controlled bubble motion to eject a drop of ink in a more energy-efficient manner.

REFERENCES:
patent: 4336548 (1982-06-01), Kawasaki
patent: 4339762 (1982-07-01), Shirato et al.
patent: 4514741 (1985-04-01), Meyer
patent: 4577202 (1986-03-01), Hara
patent: 4638337 (1987-01-01), Torpey

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