Dual electrostatic brush cleaner bias switching for multiple pass cleaning of high density toner inputs
AssigneeXerox Corporation
InventorBruce E. Thayer
Life of this patent
Estimating the term…
Abstract
An apparatus for removing charged particles from a surface, the surface being capable of movement, comprising: a preclean corotron having a first polarity; and a first means of cleaning the charged particles from the surface, having a second polarity different from said first polarity of said preclean corotron; a second means of cleaning the charged particles from the surface, having a predefined polarity, said second cleaning means being located downstream from said first cleaning means, in the direction of motion of the surface; and a controller for changing the predefined polarity of said second cleaning means from said first polarity to said second polarity.
Claims16
An apparatus for removing charged particles from a surface, the surface being capable of movement, comprising:
- a preclean corotron having a first polarity;
- and
- a first means of cleaning the charged particles from the surface, having a second polarity different from said first polarity of said preclean corotron;
- a second means of cleaning the charged particles from the surface, having a predefined polarity, said second cleaning means being located downstream from said first cleaning means, in the direction of motion of the surface;
- and
- a controller for changing the predefined polarity of said second cleaning means from said first polarity to said second polarity.
A method for cleaning charged triboelectric negative particles from a moving surface, comprising:
- transferring an image to a print medium;
- precleaning the particles remaining after transfer, on the surface, using a negatively charged corotron;
- charging a first brush positively to remove both the charged triboelectric negative particles having negative charge and the charged triboelectric negative charged particles having positive charge that remain on the surface after transfer as the first brush contacts the surface;
- and
- charging, during the first passes of a multiple pass cleaning process of a portion of the moving surface, a second brush positively, located downstream from the first brush in a direction of motion of the surface, to remove both the charged triboelectric negative particles having negative charge and the charged triboelectric negative particles having positive charge that remain on the surface after transfer as the second brush contacts the surface;
- and
- charging, during a second pass of a multiple pass cleaning process of the portion of the moving surface, a second brush negatively.
Dependencies are inferred from the claim text.