Recorders – Electric recording – Electrochemical
Patent
1991-03-07
1993-06-08
Miller, Jr., George H.
Recorders
Electric recording
Electrochemical
G01D 1506
Patent
active
052183823
ABSTRACT:
Each of the plurality of styli contained in an electrostatic print head and used for placing an electrostatic charge on a dielectric coated medium has a rectangular cross section. The thickness of the cross section is selected such that the difference between the lowest voltage on the stylus at which the amount of electrical charge deposited on the dielectric medium for any increase in voltage on the stylus increases substantially in a linear fashion and the lowest voltage on the stylus at which an unwanted background image is formed on the medium is selected to have a value equal to or less than a selected number. In one embodiment this thickness is selected to minimize this difference. In another embodiment this thickness is selected to ensure that the electrostatic print head performs for some minimum lifetime. In another embodiment this thickness is selected to ensure that the distance between adjacent styli in the print head is selected such that current flowing from a stylus having a print voltage applied thereto to a directly adjacent stylus with a lower voltage applied thereto is below a selected number.
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Miller Jr. George H.
Synergy Computer Graphics Corporation
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