Wiper and spreader blades with conductive coating

Details Wiper and spreader blades with conductive coating Wiper and spreader blades with conductive coating

1993-08-03

1995-03-21

Moses, R. L.

Photocopying

Contact printing

Light boxes

355296, 355219, G03G 2100

Patent

active

054001285

ABSTRACT:
In toner cartridge assemblies for use in copiers, printers and facsimile machines, a conductive coating is applied to the wiper and spreader blades. The wiper blade removes excess toner from the photo-sensitive photo-receptor drum and the spreader blade controls and adjusts the quantity of toner on the developing cylinder. The conductive coating is applied over the surfaces of the wiper and spreader blades which contact the drum and developing cylinder, respectively. The coating comprises polytetrafluoroethylene (TEFLON) made conductive by the addition of a conductive substance. The conductive coating reduces friction, minimizes toner attachment, and reduces warpage of the blades. The conductive coating eliminates static electricity within the cartridge assembly and, in the case of the wiper blade, eliminates the need for an erase lamp by providing a charge path away from the drum if the blade is grounded.

REFERENCES:
patent: 4240739 (1980-12-01), Koumura et al.
patent: 4937633 (1990-06-01), Ewing
patent: 5107563 (1992-04-01), Zimmerman et al.
patent: 5126913 (1992-06-01), Araya et al.

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