Patent Number: 7,088,932

Title: System and method for measuring charge/mass and liquid toner conductivty contemporaneously

Abstract: A method measures the conductivity (.sigma.) of a liquid or paste electrophotographic toner by providing two parallel plane conductive plates with a uniform separation (d) between the plates to form a space between the plates; filling the space between the plates with liquid or paste electrophotographic toner; applying an alternating current voltage of at least 100V between the plates across the liquid or paste toner; measuring as data the current passing through an external component into the plates; adjusting the data to remove current contributions attributable to impurity ions; sending adjusted data to a processor; and determining the conductivity from the adjusted data.

Inventors: Chou; Hsin Hsin (Woodbury, MN), Edwards; William D. (New Richmond, WI), Brenner; Robert E. (New Richmond, WI), McClaren; Andrew J. (Blaine, MN)

Assignee: Samsung Electronics Co., Ltd

International Classification: G03G 15/10 (20060101)

Expiration Date: 8/08/02018