G - Physics – 03 – G
Patent
G - Physics
03
G
G03G 21/00 (2006.01) G03G 15/08 (2006.01) G03G 15/095 (2006.01)
Patent
CA 2320384
A device within an image forming apparatus for positioning a doctor blade against a developer roller and preventing toner leakage. The device includes a developer housing for containing the developer roller and the doctor blade. A biasing member is positioned adjacent to the doctor blade for forcing the doctor blade against the developer roller for controlling the mass flow and charge level of the toner. The doctor blade is supported by retention stops on a front edge and a pair of supports on the back edge. Toner is prevented from leaking through the device by a flap seal positioned along the doctor blade back side and a seal positioned between each end of doctor blade end and developer housing. The invention provides for the doctor blade to be freely positioned between the retention stops, developer housing, and seals providing for the doctor blade to contact the developer roller in a consistent manner.
Buchanan John Andrew
Newman Benjamin Keith
Palumbo Franklin Joseph
Lexmark International Inc.
Smart & Biggar
LandOfFree
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