Three-Stage Preclean Treatment
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01
This article relates to the pretreatment of residual toner in an electrophotographic (EP) process prior to cleaning. The concept is to provide a uniform electrostatic charge on the toner particles for removal in an electrostatic cleaner as implemented in a two-cycle EP process or a separate magnetic brush cleaner in single-cycle EP process. This is achieved by exposing the toner to a corona of opposite charge polarity to force all particles to one charge polarity, an erase lamp to discharge the surrounding photoconductor, and finally a corona of correct polarity and optimal charge current to cause all of the toner to assume a uniform charge-to-mass ratio. (Image Omitted) Fig.