A density regulating apparatus includes a rotatable container for containing developing liquid and a rotating unit for rotating the container. The rotatable container when rotated generates a centrifugal force exerted on the developing liquid contained in the container so as to separate the developing...http://www.google.es/patents/US5923930?utm_source=gb-gplus-sharePatente US5923930 - Apparatus for controlling density of liquid developing solution and apparatus for forming images
Apparatus for controlling density of liquid developing solution and ...
