Electric-field manipulation of ejected ink drops in printing

Details Electric-field manipulation of ejected ink drops in printing Electric-field manipulation of ejected ink drops in printing

1995-06-07

1999-11-02

Malley, Daniel P.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 46, G01D 1516

Patent

active

059756837

ABSTRACT:
A method and apparatus is provided which compensates for environmental factors which cause misdirection of ink drops ejected from an ink jet printhead. Ink drops are electrostatically accelerated in a direction perpendicular to a print substrate, decreasing the ink drop flight time from the printhead to print substrate. The decrease in flight time decreases the misdirecting effect of the environmental factors on the ink drops since the environmental factors act on the ink drops for a shorter amount of time. Accelerating the ink drops also increases the spot size created when the drop impacts the print substrate, decreasing the amount of ink needed to create an image on the print substrate. The decrease in ink use results in less cockle and curl in the print substrate. The device also provides electrostatic deflection of the ink drops in directions parallel to the print substrate, increasing the resolution of the printhead.

REFERENCES:
patent: 3673601 (1972-06-01), Hertz
patent: 4379301 (1983-04-01), Fischbeck
patent: 4386358 (1983-05-01), Fischbeck
patent: 4571597 (1986-02-01), Kocot
patent: 5179394 (1993-01-01), Hoshino et al.
patent: 5305016 (1994-04-01), Quate
patent: 5520715 (1996-05-01), Oeftering

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