Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1985-09-11
1987-04-21
Hartary, Joseph W.
Recorders
Markers and/or driving means therefor
With ink supply to marker
G01D 1516
Patent
active
046600582
ABSTRACT:
In impulse ink jet printing, the method of, and apparatus for, controlling the projection of ink fluid droplets towards a printing surface by controlling the viscosity of the printing fluid at an orifice. An entire array of orifices can thereby be driven by a single pump mechanism. In one embodiment, the printing fluid used may have a liquid crystal polymer in suspension. Electrical fields can be selectively induced, in one instance, to so orient the crystals as to allow droplets to be projected through the orifice and, in another instance, to so orient the crystals as to prevent droplets from being projected. In another embodiment, heaters are provided at the orifice to heat the fluid sufficiently to allow droplets to be projected and a heat sink adequate to cool the fluid when the heater is turned off to prevent the projection of droplets.
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Hartary Joseph W.
Pitchenik David E.
Pitney Bowes Inc.
Scolnick Melvin J.
Vrahotes Peter
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