Patent classifications
G
PHYSICS
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G03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
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G03G
ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
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15/00
Apparatus for electrographic processes using a charge pattern
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G03G15/08
using a solid developer, e.g. powder developer
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G03G15/0822
Arrangements for preparing, mixing, supplying or dispensing developer
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G03G15/0848
Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
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G03G15/0849
Detection or control means for the developer concentration
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G03G15/0855
the concentration being measured by optical means
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