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Automatic Ink Deflection Plate Cleaner

IP.com Disclosure Number: IPCOM000080851D
Original Publication Date: 1974-Feb-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Burns, HR: AUTHOR

Abstract

Depicted in the figure is a self-cleaning mechanism and control circuitry for ink jet printer high-voltage deflection plates. The mechanism specifically relates to an automatic cleaning mechanism for cleaning excess or unwanted ink from the deflection plates during "start-up" of the system, during "shutdown" of the system, and during operation of the system when an arc is detected between the deflection plates due to excess ink between the plates.

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Automatic Ink Deflection Plate Cleaner

Depicted in the figure is a self-cleaning mechanism and control circuitry for ink jet printer high-voltage deflection plates.

The mechanism specifically relates to an automatic cleaning mechanism for cleaning excess or unwanted ink from the deflection plates during "start-up" of the system, during "shutdown" of the system, and during operation of the system when an arc is detected between the deflection plates due to excess ink between the plates.

Referring to the figure, the arc detection circuit 10 triggers with a sudden change in voltage or current of high-voltage DC power supply 12. The change in voltage or current of power supply 12 is caused by an arcing condition in deflection plates 14. The signal generated from arc detection circuit 10 causes the system to "cycle-down", which includes turning off high-voltage supply 12, turning off ink stream 16, and pivoting deflection plates 14 by rotary spring loaded solenoid 18 away from the ink stream area. During an arcing condition, the arc signal is also fed to OR circuit 20 which provides a signal to AND circuit
22.

When these preconditions have occurred, a signal is provided to drive rotary brush solenoid 24 which rotates cleaning brush 26 between deflection plates 14 wiping away any excess ink. This same signal is delayed in delay circuit 28 and utilized to restore the system to normal operation, i.e., energize power supply 12, release rotary solenoid 18, turn on ink stre...