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.

 
Web www.patentalert.com

< Pixel cell voltage control and simplified circuit for prior to frame display data loading

< In-plane field type liquid crystal display device comprising liquid crystal molecules with more than two kinds of reorientation directions

> Wafer burn-in and test employing detachable cartridge

> Magnetoelectronic devices utilizing protective capping layers and methods of fabricating the same

~ 00281