Recorders – Record receiver deforming
Patent
1977-04-06
1979-02-06
Miller, Jr., George H.
Recorders
Record receiver deforming
G01D 1518
Patent
active
041386868
ABSTRACT:
An electronically-controlled ink stream printer is disclosed which selects the ink used to produce an image by the controllable presence or absence of electrostatic forces acting mainly between portions of ink surface and portions of a solid surface. If the ink is electrically conducting then parts of the ink surface act as capacitor plates with parts of the solid surface forming complimentary plates. If the ink is a dielectric then parts of the ink surface develop a charge proportional to that induced on the contiguous solid surface. Various portions of the solid surface can have voltages applied independently.
The solid surfaces may resemble rotating drums, flat surfaces, or curved surfaces. Droplet paths are affected by an interplay between controllable electrical forces and uncontrollable but predictable forces such as inertia, adhesion, air pressure, surface pressure, and aerodynamics. The path of a droplet determines whether it will become part of an output image. Various embodiments are described using one drum, two drums, a stationary surface, and a drum and a stationary surface.
Also described are a means to prevent ink solids from precipitating and clogging any ink printer and a means to deflect the impact points of streams of selected droplets by discrete distances perpendicular to motion of the output means. This deflection of impact points can simulate a closer spacing between multiple ink jets.
REFERENCES:
patent: 3769624 (1973-10-01), Lee et al.
patent: 3893623 (1975-07-01), Toupin
patent: 4023183 (1977-05-01), Takano et al.
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