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Patent Searching and Data


Title:
DEVELOPING DEVICE
Document Type and Number:
Japanese Patent JPS59147369
Kind Code:
A
Abstract:

PURPOSE: To prevent a developer from being napped on a detection coil by arranging an auxiliary conveyance pole with a different magnetic polarity between two magnetic poles, i.e. a separating pole and the 1st development pre-conveyance pole on an included angle side.

CONSTITUTION: The included angle θ between the separating pole 12 and the 1st development pre-conveyance pole 8 is set to 110°≤θ≤130° and an attracting pole 18 and the auxiliary conveyance pole 19 are provided dividing the angle almost equally. Therefore, a magnetic body iron core 17 in a toner mixing ratio detector is never magnetized by lines of magnetic force. Thus, no developer 3 is napped on the detection coil 16. Further, the developer at this part is returned smoothly, so a measurement of a toner mixing ratio is taken accurately.


Inventors:
SHIGETA ICHIROU
KAMATA TOMOYASU
Application Number:
JP1983000020718
Publication Date:
August 23, 1984
Filing Date:
February 10, 1983
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G03G15/09; (IPC1-7): G03G15/09