Print cartridge RF return current control

Details Print cartridge RF return current control Print cartridge RF return current control

1998-12-11

2000-12-12

Pendegrass, Joan

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

174 35R, 361816, B41J 241

Patent

active

061605654

ABSTRACT:
A shielding conductive plane, such as a copper layer, which acts as an intermediary layer between an electrically active area and a mechanical substrate of an electron beam cartridge, provides a direct electrical path to control and direct RF currents, minimizing stray electrical noise which interferes with other sensor devices of the printer, such as data system lines and low voltage controlling electronics. The intermediary layer is electrically insulated from the active area and the mechanical substrate by insulating material and through suitable electrical connections provides an adequate way to dissipate the current path of the RF high voltage burst to return to a grounding source. Capacitive coupling of the electrode drivers or the finger electrodes themselves to the mechanical substrate is unnecessary.

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