Potential sensor and image forming apparatus having...

Details Potential sensor and image forming apparatus having... Potential sensor and image forming apparatus having...

2007-10-25

2009-12-29

Dole, Timothy J (Department: 2831)

Electricity: measuring and testing

Electrostatic field

Using modulation-type electrometer

C324S072500, C399S048000, C399S073000

Reexamination Certificate

active

07639020

ABSTRACT:
A potential sensor is provided in which the adhesion of toner particles to the potential sensor is reduced or prevented from occurring, reducing or preventing the occurrence of a situation that accurate detection cannot be performed. The potential sensor has a movable member, detecting electrodes formed on the movable member, a support which movably supports the movable member, a driving mechanism which drives the movable member, and a stationary member which supports the support. Between the movable member and the stationary member, a first gap is so formed as to make the movable member101movable. The first gap has a part that is not larger in width than the maximum size of toner particles when the movable member is not elastically deformed and is at a neutral position.

REFERENCES:
patent: 4317611 (1982-03-01), Petersen
patent: 5434609 (1995-07-01), Rhodes
patent: 7242882 (2007-07-01), Ichimura et al.
patent: 7265554 (2007-09-01), Ichimura et al.
patent: 7504832 (2009-03-01), Kandori et al.
patent: 2006/0170935 (2006-08-01), Mukai et al.
patent: 7-13396 (1995-01-01), None
patent: 7-56414 (1995-03-01), None

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