Image forming apparatus having a plurality of aperature electrod

Details Image forming apparatus having a plurality of aperature electrod Image forming apparatus having a plurality of aperature electrod

1995-04-07

1997-08-19

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 206

Patent

active

056593449

ABSTRACT:
In an image forming apparatus, plural apertures are formed in a base member of an aperture electrode unit with a control electrode surrounding each aperture. Middle holes are formed between neighboring control electrodes. Each middle hole is controlled by the two neighboring control electrodes. An ON electric field is formed in the middle hole when both of the neighboring control electrodes adjacent to the middle hole are switched on. At this time, toner which is fed to a space between the apertures is passed through the middle hole. Therefore, continuous dots can be recorded in a direction perpendicular to a sheet feed direction. In addition, when the control electrodes at both sides of the middle hole are supplied with an OFF voltage at the same time, an image forming operation can be controlled without fog. Therefore, an image can be stably formed with excellent image quality.

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