Patent
Electrographic recording devices employing electrostatic induction electrodes
TLDR
In this article, a pair of high voltage switching circuits associated with first and second sources of voltage supply are connected with a pin-shaped record electrode through a resistor and an electrostatic induction plate, respectively.Abstract:
A pair of high voltage switching circuits associated with first and second sources of voltage supply are connected with a pin-shaped record electrode through a resistor and an electrostatic induction plate, respectively. The electrostatic induction plate is disposed very closely adjacent the record electrode or its associated lead wires in a manner to establish an electrostatic capacitive coupling therebetween. A resistor, capacitor combination provides an integration circuit for current flow from the first source of voltage supply to the record electrode and also provides a differentiation circuit for current flow from the second voltage supply source to the record electrode. Voltages from the first and second sources are added together in an incremental fashion via the resistor-capacitor combination. The sum of the voltages which exceeds the threshold value of the voltage, i.e. the ignition voltage, is applied to the record electrode to produce a spontaneous gas discharge.read more
Citations
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Patent
Control system for electrographic stylus writing apparatus
TL;DR: In this paper, a matrix array for the supply of an electrographic stylus writing apparatus, a plurality of styli are driven by short pulses through R/C networks.
Patent
Electrographic imaging with non-sequential electrode actuation
John Blumenthal,Chad Z. Moore +1 more
TL;DR: In this article, a method and apparatus for charging a charge retentive surface of a record medium with a latent electrostatic image is described, where a plurality of arrays of recording electrodes are alternately divided into first and second groups of arrays.
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TL;DR: In this paper, a shoe is used to protect the recording electrodes from pinhole shorts in the dielectric layer of the recording medium, and the charging path impedance is reduced permitting reduction in writing speed and a corresponding increase in overall recording time.
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Electrostatic recording multi-stylus electrode device
TL;DR: An electrostatic recording multi-stylus electrode device is capable of reducing significantly the electrostatic capacity between the connecting wires and between the lead wires of the multiple stylus electrodes of the electrode device by providing a plurality of insulating base plates, for supporting the wires, for each row of the electrodes so as to dispose the wires sufficiently apart from each other as discussed by the authors.
References
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Patent
Electrostatic matrix head construction
TL;DR: In this article, a matrix head for use in electrostatic printing is formed from a plurality of stacked printed circuit boards, each circuit board is printed on both sides with conductive strips, the strips on one side being perpendicularly aligned to the ones on the other side.
Patent
Electrographic imaging system and heads therefor
TL;DR: In this article, an electrographic imaging system is provided for producing an electrostatic latent image upon a record medium having dielectric and conductive layers, where an array of small electrical conductors is supported in a dielectrical material in closely spaced relation to each other with the end faces thereof exposed and substantially flush with the support.
Patent
Electrostatic printing apparatus
Kenmi Tsukatani,Makoto Ohta +1 more
TL;DR: In this article, a group of PIN-Ejects are connected to and drive the PIN-driving and column-driving cars with a signal of opposing polarity, which is not clamped by the clamping circles.