Cleaning unit for a xerographic printing machine
AssigneeHitachi Koki Co., Ltd.
InventorsToshimitsu Harada, Sadaki Maeda, Shinichi Nishino, Toshitaka Ogawa
Life of this patent
Estimating the term…
Abstract
A cleaning unit for a xerographic printing machine, or the like. A system for mechanically or electrostatically removing objects, such a toner or paper particles in a printing machine from a photoreceptor or other member to be cleaned, includes a cleaning brush rotating in contact with the member to be cleaned, a cleaning roll brought into contact with the cleaning brush to electrostatically or magnetically remove toner from the cleaning brush, and a cleaning blade supported at the base by a blade holder. The cleaning blade is pressed against the cleaning roll, to remove toner deposited on the surface of the cleaning roll. The cleaning blade is a resilient, thin metal plate.
Claims10
A cleaning unit for mechanically or electrostatically removing particles from a member to be cleaned, comprising:
- a cleaning brush in rotating contact with a member to be cleaned;
- a cleaning roll, in contact with said cleaning brush so as to electrostatically and magnetically remove particles from said cleaning brush;
- and
- a cleaning blade supported in cantilever fashion at a base thereof by a blade holder, said cleaning blade being positioned such that a top surface of said cleaning blade presses against said cleaning roll at a free end of said blade so as to remove said toner deposited on a surface of said cleaning roll, said cleaning blade being a resilient, thin metal plate;
- wherein said cleaning blade is bonded to a bonding surface of said blade holder so that said cleaning blade extends from an end of said blade holder, said cleaning blade is bent in a concave manner on a bottom surface thereof opposite of said cleaning roll, and said bonding surface is inclined with relation to said cleaning roll so as to satisfy the angular relationships .theta.1<90.degree., .theta.1<.theta.2, .theta.2<.theta.3, and 90.degree.<.theta.3<180.infin., where, when a line Z--Z is normal to a line P--P tangent to said top surface of said cleaning blade at a contact portion between said top surface of said cleaning blade and said cleaning roll:
- .theta.1 is an angle between the line Z--Z and a line Y--Y tangentially extending from said bonding surface of said blade holder;
- .theta.2 is an angle between the line Z--Z and the line P--P;
- and
- .theta.3 is an angle between the line Z--Z and a line X--X tangent to a surface of said cleaning roll at said contact portion between said cleaning blade and said cleaning roll.
Dependencies are inferred from the claim text.