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Patent Searching and Data


Title:
ELECTRIC CURTAIN TYPE DEVELOPING DEVICE
Document Type and Number:
Japanese Patent JPS6313078
Kind Code:
A
Abstract:

PURPOSE: To prevent an image from fogging and becoming irregular for a long period by providing a means which cuts off the supply of a developer after the end of development and stopping driving an electric field curtain after a developer in the middle of conveyance is conveyed and discharged.

CONSTITUTION: An opening part 10 is closed fully by a control plate 9 at the end of development to prevent toner from being supplied onto an electric field curtain panel 3. Further, sequence control is so performed that a 3-phase alternating current is applied to electrodes 4 and 4' successively and a switch 12 is turned off after developer is carried out completely from on the electric field curtain panel 3, thereby preventing the toner from being deposited on the electrodes. Thus, a toner supply cut off means is provided and the power source of the electric field curtain is turned off after the developer is removed completely, thereby obtaining a stable image which has neither fog nor irregularity for a long period.


Inventors:
SAKAMI YUJI
KUREMATSU KATSUMI
HOSONO NAGAO
Application Number:
JP1986000156818
Publication Date:
January 20, 1988
Filing Date:
July 03, 1986
Export Citation:
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Assignee:
CANON KK
International Classes:
G03G15/08; (IPC1-7): G03G15/08