Image forming apparatus

Details Image forming apparatus Image forming apparatus

1996-10-23

1998-06-16

Ramirez, Nestor R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

399241, B41J 205

Patent

active

057678790

ABSTRACT:
An image forming apparatus has a toner carrier roller, a back electrode which is located so as to face the toner carrier roller, a voltage source for applying a voltage which generates an electric field for making toner fly from the toner carrier roller to the back electrode, a control electrode which has many openings through which the toner is allowed to pass and first and second conductive layers formed around the openings and is formed so that at least portions of the first and second conductive layers which surround the openings do not overlap each other in a direction where the toner flies from the toner carrier roller to the back electrode, and a voltage source for applying a voltage which controls the toner passing through the opening according to an image signal. As a result, an electrostatic capacity is hardly formed between the first conductive layer and the second conductive layer, thereby suppressing a fall in response characteristic to the toner flying control due to the electrostatic capacity.

REFERENCES:
patent: 5357274 (1994-10-01), Kitamura
patent: 5600355 (1997-02-01), Wada
patent: 5633110 (1997-05-01), Desie et al.

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