Photocopying – Contact printing – Light boxes
Patent
1987-10-30
1989-11-14
Grimley, A. T.
Photocopying
Contact printing
Light boxes
118657, 118688, G03G 1509, B05C 1100
Patent
active
048811033
ABSTRACT:
This invention discloses a developing apparatus wherein a brush of a developing agent is formed on a developing sleeve by a magnetic field of a permanent magnet disposed inside the developing sleeve, and at least the developing sleeve is rotated while the brush is kept in contact with a photosensitive body, thereby developing an electrostatic latent image formed on the photosensitive body. In this apparatus, an agitating member having magnetic ring portions which abut against the developing sleeve and an agitating portion for agitating the developing agent is pivotally disposed in a developing vessel to be parallel to the developing sleeve, and a rotation detecting unit for outputting a signal corresponding to a rotational speed of the agitating member and a residual amount detecting unit for detecting a residual amount of the developing agent in the developing vessel in accordance with an output from the rotation detecting unit are provided.
REFERENCES:
patent: 4227796 (1980-10-01), Kamp et al.
patent: 4324199 (1982-04-01), Morikawa
patent: 4373468 (1983-02-01), Suda et al.
patent: 4406535 (1983-09-01), Sakamoto et al.
patent: 4406536 (1983-09-01), Suzuki et al.
patent: 4423948 (1984-01-01), Kimura et al.
patent: 4456364 (1984-06-01), Hatzis
patent: 4711551 (1987-12-01), Fujio et al.
Fujita Atsushi
Seto Yutaka
Suzuki Shigehiro
Suzuki Tomohiro
Tai Akira
Grimley A. T.
Konica Corporation
Pipala E. J.
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