Browse Prior Art Database

Anti-Caking Agent For Toner Disclosure Number: IPCOM000065993D
Original Publication Date: 1979-Jan-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue


Related People

Eklund, CD Fuller, SR Jachimiak, PD [+details]


Toner for electrophotographic copiers must satisfy many requirements. One of the principal requirements is that the powder take and retain an electric charge generated by contact with the carrier particles. The toner must also remain free-flowing through storage and through the replenishing, developing, and cleaning functions in the copier. Therefore, a particulate additive must be blended into the toner which not only serves the primary purpose of preventing caking, but also must have constant electrical characteristics under a wide range of environmental conditions, particularly humidity. Carbon black, at about one percent by weight of toner, has been found to have appropriate properties in these respects.