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CHARACTERISTIC SLOPE CONTROL FOR CORONA DISCHARGE DEVICES

IP.com Disclosure Number: IPCOM000025258D
Original Publication Date: 1984-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 76K

Publishing Venue

Xerox Disclosure Journal

Abstract

Circuitry for controlling the characteristic slope of corona discharge devices such as bare wire corotrons and dicorotrons is disclosed. The circuitry illustrated in Figure 1 is used with bare corotrons while that of Figure 2 is used with dicorotrons.

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KEROX DISCLOSURE JOURNAL

CHARACTERISTIC SLOPE CONTROL FOR CORONA DISCHARGE DEVICES
Vittal U. Shenoy

Proposed Classification
U.S. Cl. 355/3CH and 355/3TR Int. Cl. G03g 15/00

\ - I

Volume 9 Number 2 March/April 1984 137

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CHARACTERISTIC SLOPE CONTROL FOR CORONA DISCHARGE DEVICES (Cont'd)

Circuitry for controlling the characteristic slope of corona discharge devices such as bare wire corotrons and dicorotrons is disclosed. The circuitry illustrated in Figure 1 is used with bare corotrons while that of Figure 2 is used with dicorotrons.

The corotron of Figure 1 comprises a metal shield 10 capacitively coupled to ground via capacitor 12 and a bare wire 14. The corotron is adapted for use in various modes in connection with a photoconductive plate or member 16. A source 18 of AC voltage serves to supply alternating current to the bare wire 14. A variable resistor 20 forming a part of a DC biasing circuit 22 serves to very the output characteristics of the bare wire 14 in accordance with the desired performance for a specific operational mode. For example, when the corotron is used as a photoreceptor charging device if the value of resistor 20 is infinite, no negative current is delivered to the plate.

As shown in Figure 2, the dicorotron comprises a metal shield 30 capacitively coupled to ground via a capacitor 32 and a dicorotron wire 34 (Le., conductive wire with an insulator coating of a predetermined...