Precision blade for metering toner on developing roller

Details Precision blade for metering toner on developing roller Precision blade for metering toner on developing roller

1999-05-27

2000-02-01

Royer, William

Electrophotography

Image formation

Development

G03G 1508

Patent

active

060212993

ABSTRACT:
A blade for metering toner on a developing roller of an electrophotographic printer is made of a resilient material and includes a first elongated segment, a second elongated segment which extends generally perpendicular to the first segment and a transition portion which connects the first segment and the second segment. The transition portion has a thickness and a length. The transition portion is generally tangent to a surface of the developing roller and includes a groove which is obliquely cut therein in a direction generally opposite from a direction of rotation of the developing roller. The groove forms a movable lip in the transition portion and extends generally toward the second segment a distance approximately one half the thickness of the transition portion. The lip further has a length which extends the length of the transition portion. The lip contacts toner on the surface of the developing roller proximate to the groove and is elastically displaceable by the toner with respect to the first segment by the thickness of the groove.

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