TONER CONCENTRATION DEVICE FOR FIELD USE
Original Publication Date: 1979-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
To measure the toner concentration of developer material for xerographic repro-duction machines? a toner concentration device is used. The device 10 is intended for field use and has a test cell 12 and a reference cell 14. The test cell is filled with water, surfactant and anti-freeze. The reference cell is triangularly shaped and is filled with a mixture of clear rubber and toner; a broad and continuous density range between the top and bottom of the device is attained. A tube 16 is filled with a sample of the developer material? and a ram 18 is used to push the developer material into the test cell after which the device is shaken to put the developer material in suspension. An electronic viewer 20 is moved up and down the device until the optical density of the test cell matches that of the reference cell at which time an LED lights up to indicate a balanced condition.