Radiation imagery chemistry: process – composition – or product th – Including control feature responsive to a test or measurement
Patent
1978-05-01
1980-04-29
Esposito, Michael F.
Radiation imagery chemistry: process, composition, or product th
Including control feature responsive to a test or measurement
118658, 355 14D, 430122, G03G 1309
Patent
active
042006651
ABSTRACT:
A method and an apparatus for controlling the toner concentration of a dry developer, including a magnetic carrier and a non-magnetic toner, used in a magnetic brush developing system. The system includes an inherent magnetic means and an inheret circulation path through a portion of which a steady stream of the developer is established during its operation. A device such as a Hall element is set at a position near the steady stream portion of the developer and in the atmosphere for detecting the magnitude of a leakage magnetic flux from the portion which is emanated from the magnetic means, to determine the value of toner concentration of the developer in the system through analyzing. Thereupon, a supply of toner to the system is automatically controlled based on the determined value.
REFERENCES:
patent: 3152924 (1964-10-01), Wanielista et al.
patent: 3802381 (1974-04-01), O'Neill et al.
patent: 3892672 (1975-07-01), Gawron
patent: 3893408 (1975-07-01), Lamel
patent: 3932034 (1976-01-01), Takahashi
Suzuki Koichi
Suzuki Minoru
Suzuki Shigeru
Esposito Michael F.
Frenkel Stuart D.
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