Title: Electrographic process and apparatus with recording after toning

Abstract: Recording medium is disposed in a recording region defined between a pair of electrodes impressed with a signal voltage. Electroconductive toner is supplied between one surface of the recording medium and one of the electrodes and electroconductive material in the form of a powder or liquid is supplied between the other surface of the recording medium and the other electrode. By selectively applying the signal voltage the toner, recording medium and the electroconductive material are charged to selectively deposit the toner and the electroconductive material on the surfaces of the recording medium thus forming a toner image. After removing surplus toner, the toner image is fixed to obtain a permanent record.

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Inventors: Ochi, Hiroshi (Kodaira, JP)

Application Number: 816059
Filing Date: 1977-07-15
Publication_date: 1979-02-27
Assignee: Nippon Telegraph and Telephone Public Corporation (Tokyo, JP)
Primary Class(es): 346/74.2 347/151
Other Classes:
US Patent Ref:

2753796	Jul, 1956	Wood	346/153.
3182591	May, 1965	Carlson	346/153.
3308473	Mar, 1967	Sawazaki	346/153.
3551146	Dec, 1970	Gundlach	346/153.
3714665	Jan, 1973	Mutschler	346/153.
3743411	Jul, 1973	Krekow	346/153.
3778841	Dec, 1973	Gundlach	346/153.
3879737	Apr, 1975	Lunde	346/153.

Other Refs:
Primary Examiner: Lucas, Jay P.
Assistant Examiner:
Attorney: Townsend and Townsend