Image forming apparatus having toner flow control which shields

Incremental printing of symbolic information – Ink jet – Ejector mechanism

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B41J 206

Patent

active

059800224

ABSTRACT:
In an image forming apparatus, plural apertures are formed in a row in an insulation sheet of polyimide and control electrodes for the respective apertures are formed on the insulation sheet. The operation portion of each control electrode is directly contacted with the insulation sheet and the wire portion (non-operation portion) of the control electrode is disposed to face the insulation sheet through a second insulation sheet. A shield electrode is further provided between the two insulation sheets to prevent the occurrence of an electric field between the toner carry roller and the wire portions of the control electrodes.

REFERENCES:
patent: 3689935 (1972-09-01), Pressman et al.
patent: 4743926 (1988-05-01), Schmidlin et al.
patent: 4755837 (1988-07-01), Schmidlin et al.
patent: 4780733 (1988-10-01), Schmidlin
patent: 4814796 (1989-03-01), Schmidlin
patent: 4912489 (1990-03-01), Schmidlin
patent: 5036341 (1991-07-01), Larsson

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