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Developing Electrostatic Charge Patterns

IP.com Disclosure Number: IPCOM000095094D
Original Publication Date: 1965-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Crawford, TM: AUTHOR

Abstract

Uniform, highly dense, developed areas can be obtained by the development device. This has a porous conductive member through which liquid toner passes for developing an electrostatic image and which functions as a conductive electrode. In effect, the electrode appears solid to the electrostatic image and yet the toner is able to reach the image as if the electrode is not present.

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Developing Electrostatic Charge Patterns

Uniform, highly dense, developed areas can be obtained by the development device. This has a porous conductive member through which liquid toner passes for developing an electrostatic image and which functions as a conductive electrode. In effect, the electrode appears solid to the electrostatic image and yet the toner is able to reach the image as if the electrode is not present.

The device comprises rotatable drum 1 whose cylindrical wall 2 is formed with a plurality of holes 3 to render the wall porous. Drum 1 is mounted in receptacle 4 for receiving the excess toner. This is recirculated back to the liquid toner supply not shown. The liquid toner is fed into drum 1 through stationary tube 5 associated with drum 1. A portion of tube 5 within drum 1 is formed with holes or slots 6.

These are arranged to direct the liquid toner against the underside of wall 2 and through holes 3. When the liquid toner is sprayed from holes 6 of tube 5 through porous wall 2, thin layer 7 of liquid toner is formed on the outer surface of wall 2. Member 8 carrying the electrostatic image is fed past drum 1. Thus, the electrostatic image comes into contact with thin layer 7 on drum 1. In order for drum 1 to function as a development electrode, it is collected to voltage source 9. This also is connected to conductive plate 10 under which member 8 passes.

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