JPS58105549U

JPS58105549U - electrophotographic equipment

Info

Publication number: JPS58105549U
Application number: JP270182U
Authority: JP
Inventors: 茂山崎; 志村　顕
Original assignee: 株式会社リコー
Priority date: 1982-01-14
Filing date: 1982-01-14
Publication date: 1983-07-18

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来の電子写真装置の構成図、第２図は本考案
の一実施例の回路図、第３図は第２図の各回路及び素子
から出力される信号のタイミングチャート、第４図は本
考案の他の実施例の回路図である。１・・・・・・感光体、３・・・・・・帯電チャージャ
、３ａ。８ａ、ｌｅａ・・・・・・ケース、４，９．１１・・・
・・・チャージワイヤ、５・・・・・・グリッドワイヤ
、６・・・・・・光、７・・・・・・現像装置、８・・
・・・・転写チャージャ、１０・・・・・・除電チャー
ジャ、′１２・・・・・・クリーニングブラシ、・１３
・・・・・・定着ローラ、１４・・・・・・記録紙、１
５゜１８・・・・・・高電圧源、１６．　１９．　２２
．　２４・・・・・・ＮＯＴ回路、１７，２０．２３・
・・・・・フォトカップラ、２１・・・・・・ＡＮＤ回
路、２５・・・・・・電極板、２９　゛・・・・・・バ
リスタ。FIG. 1 is a block diagram of a conventional electrophotographic apparatus, FIG. 2 is a circuit diagram of an embodiment of the present invention, FIG. 3 is a timing chart of signals output from each circuit and element in FIG. 2, and FIG. The figure is a circuit diagram of another embodiment of the present invention. 1... Photoreceptor, 3... Charger, 3a. 8a, lea...Case, 4,9.11...
...Charge wire, 5...Grid wire, 6...Light, 7...Development device, 8...
...Transfer charger, 10...Static elimination charger,'12...Cleaning brush, 13
...Fixing roller, 14...Recording paper, 1
5゜18...High voltage source, 16. 19. 22
．． 24...NOT circuit, 17,20.23.
...Photocoupler, 21...AND circuit, 25...Electrode plate, 29゛...Varistor.

Claims

[Claims for Utility Model Registration] - (1) When applying a high voltage with a polarity opposite to that of the charged toner to the charge wire to charge the photoreceptor,
The charging voltage of the photoconductor is controlled by a grid wire connected to a constant voltage element, and when a high voltage with a polarity opposite to that of the toner is not applied to the charging wire, a bias voltage with the same polarity as the toner is applied. In an electrophotographic apparatus equipped with an electrostatic charger that applies a voltage to the grid wire to remove the toner attached to the grid wire, when a high voltage is applied to the charge wire of the static elimination charger, the grounded static elimination charger An electrophotographic apparatus characterized in that a voltage generated between the case and the case is applied to a grid wire of the charger as a voltage source of the bias voltage. (2) The constant voltage element is connected between the voltage source and the grid wire of the charger, and also controls the bias voltage applied to the grid wire. An electrophotographic device according to scope item (1). □