Device for controlling concentration of a liquid developing mach

Details Device for controlling concentration of a liquid developing mach Device for controlling concentration of a liquid developing mach

1985-07-01

1987-06-09

Nilson, Robert G.

Fluid handling

Self-proportioning or correlating systems

Mixture condition maintaining or sensing

118691, G05D 1102

Patent

active

046713093

ABSTRACT:
An apparatus for controlling concentration of a liquid developer in a machine using liquid developer has a developer device for developing an electrostatic latent image by a liquid developer, a tank for containing the liquid developer having an inlet and an outlet, a liquid developer circulating pipe having a supply portion extending from the tank to the inlet and a discharge portion extending from the developer device to the tank, a vacuum pump in the discharge portion of the developer circulating pipe for circulating liquid developer from the tank through the developer device and returning it to the tank, a toner container for containing a concentrated toner liquid, a toner supply pipe having one end connected to the toner container and having the other end connected to the discharge portion of the liquid developer circulating pipe at a location between the developer device and the vacuum pump for supplying concentrated toner liquid to the tank, and a valve in the toner supply pipe for opening and closing the toner supply pipe.

REFERENCES:
patent: 3299787 (1967-01-01), Kolb
patent: 3381662 (1968-05-01), Kolb et al.
patent: 3540409 (1970-11-01), Lloyd
patent: 3548855 (1970-12-01), Fathauer
patent: 3699992 (1972-10-01), Knechtel
patent: 3739800 (1973-06-01), Aasen
patent: 4119989 (1978-10-01), Carvalko
patent: 4222497 (1980-09-01), Lloyd et al.
patent: 4224154 (1980-09-01), Steininger
patent: 4240085 (1980-12-01), Tacklind

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