Abstract: A rotating cover on the developer unit of an imaging apparatus to prevent toner leaks from the toner entry port of the developer unit. When installing a toner cartridge, the cartridge contacts a surface to cause the cover to rotate to an open position, thereby exposing the toner port for receiving toner. Conversely, when the toner cartridge is removed the cover is rotated into a closed position with the aid of a torsion spring so as to seal the toner entry port of the developer unit.

Abstract: A rotating cover on the developer unit of an imaging apparatus to prevent toner leaks from the toner entry port of the developer unit. When installing a toner cartridge, the cartridge contacts a surface to cause the cover to rotate to an open position, thereby exposing the toner port for receiving toner. Conversely, when the toner cartridge is removed the cover is rotated into a closed position with the aid of a torsion spring so as to seal the toner entry port of the developer unit.

Abstract: A doctor blade assembly for an electrophotographic printer comprises a first bracket having a first width dimension and a first height dimension, a second bracket having a second width dimension and a second height dimension, a doctor blade disposed between the front bracket and the rear bracket, the doctor blade having a cantilever length, the cantilever length varying from a first length at a first location and a second length at a second location moving along the width dimensions.

Abstract: A doctor blade assembly for an electrophotographic printer comprises a first bracket having a first width dimension and a first height dimension, a second bracket having a second width dimension and a second height dimension, a doctor blade disposed between the front bracket and the rear bracket, the doctor blade having a cantilever length, the cantilever length varying from a first length at a first location and a second length at a second location moving along said width dimensions.

Abstract: A toner cartridge for use in a laser printer has a toner reservoir or hopper in which an agitator is pivoted by a rotating paddle away from its home position proximate an exit opening and then returned to its home position by a spring exerting a predetermined desired force on the agitator after the agitator ceases to be moved by the paddle. The spring may be a cantilever spring, a torsion spring, or a stamped and formed leaf spring.

Abstract: A toner cartridge for use in a laser printer has a toner reservoir or hopper in which an agitator is pivoted by a rotating paddle away from its home position proximate an exit opening and then returned to its home position by a spring exerting a predetermined desired force on the agitator after the agitator ceases to be moved by the paddle. The spring may be a cantilever spring, a torsion spring, or a stamped and formed leaf spring.

Abstract: A method of determining an output level of an output stack of print media in an image forming apparatus. The print media is transported, one print medium at a time, to the output stack. A sensor positioned in association with the output stack senses when the output level of the output stack has reached a near full level. At least one physical characteristic of the print media is identified which can affect the stacking of the print media. The number of the print media transported to the output stack is counted after the near full level is sensed. A determination that the output level of the output stack has reached a full level is made, dependent upon each of the at least one physical characteristic and the counted number of the print media.