ELECTROSTATIC BRUSH SET PREVENTION MECHANISM
Original Publication Date: 1987-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
When an electrostatic brush is stopped and it remains in contact with a surface for a long period of time (over the weekend for example) it tends to take a set. Fibers in the contact area deform in the direction of brush rotation before it was stopped. It takes a substantial amount of time, approximately one minute, before the set disappears upon subsequent use if the brush is rotated in the same direction again. We have found that the set disappears in about one revolution of the brush if the brush is rotated in the opposite direction. Accordingly, the foregoing problem can be obviated by rotating the brush in the opposite direction prior to termination of its use leaving the fibers in the contact area deformed in the opposite direction. Upon start up of the xerographic apparatus in which the brush is used, the brush will rotate in the desired direction which will cause it to straighten the deformed fibers quickly thereby restoring brush performance quicker.