Browse Prior Art Database

SHARED HIGH VOLTAGE AC POWER SUPPLY

IP.com Disclosure Number: IPCOM000025141D
Original Publication Date: 1983-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 79K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to corona discharge devices to be used in the xerographic or similar process and more particularly to a sheared high voltage AC power supply therefor. Disclosed in Figure 1 is a circuit diagram 10 for a single AC output for corona discharge device including a pin coronode 12 together with DC outputs for a plurality of pin coronodes 14 (only one shown). Power for the coronode is derived from the secondary winding 16 of a single topped high voltage transformer 18. The primary focus herein is on the single AC coronode 12. The conductive shield 20 of the discharge devices is self-biased by means of a suitable resistor 22 connecting the shield to ground. Control of the average coronode potential is achieved by providing for a controlled offset bias on the normally grounded secondary winding 16. Suitable interconnected components, as shown, serve to provide for the controlled offset bias.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

SHARED HIGH VOLTAGE AC POWER SUPPLY
Morton Silverberg

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

FIG 2

Volume 8 Number 5 September/October 1983 423

[This page contains 1 picture or other non-text object]

Page 2 of 2

SHARED HIGH VOLTAGE AC POWER SUPPLY (Cont'd)

This disclosure relates to corona discharge devices to be used in the xerographic or similar process and more particularly to a sheared high voltage AC power supply therefor.

Disclosed in Figure 1 is a circuit diagram 10 for a single AC output for corona discharge device including a pin coronode 12 together with DC outputs for a plurality of pin coronodes 14 (only one shown). Power for the coronode is derived from the secondary winding 16 of a single topped high voltage transformer 18. The primary focus herein is on the single AC coronode 12. The conductive shield 20 of the discharge devices is self-biased by means of a suitable resistor 22 connecting the shield to ground. Control of the average coronode potential is achieved by providing for a controlled offset bias on the normally grounded secondary winding
16. Suitable interconnected components, as shown, serve to provide for the controlled offset bias.

Figure 2 shows an implementation for a multiple number of high voltage AC outputs. Capacitors 24 and 26 allow for individual adjustment of the applied high voltages and force any delivered DC current to flow through the shield circuit. This provides for minimizin...