A DEVELOPED TONER MASS MEASUREMENT FOR A LIQUID INK DEVELOPMENT SYSTEM
Original Publication Date: 1986-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
It is highly desirable to be capable of repeatedly measuring the toner mass in a liquid ink system. This may be achieved by squeegeeing off toner particles from a photoreceptor with a small rubber member. The rubber piece laden with the toner particles is placed in a graduated cylinder. A predetermined amount of liquid carrier is added to the cylinder so as to dilute the toner to a specified volume. The liquid carrier is agitated until the rubber is clean with the liquid carrier and toner particle solution being substantially uniform. A sample is drawn from the cylinder and the transmission characteristics are measured with a spectrophotometer. This reading is then translated into toner particle concentration within the liquid carrier by the utilization of a calibration curve. The toner mass is determined by the concentration of solution, the volume of solution and the mass density of pure toner.