JP2007102085A5 - - Google Patents

Claims (5)

Having a developer accommodating portion for accommodating at least the developer;
A plurality of image forming means having a developing means for forming a developer image on an image carrier;
A developer amount detecting means for detecting the amount of developer stored in the developer storing portion by a change in capacitance when a bias is applied to the image forming means;
Wherein among the plurality of image forming means, by running at least two simultaneously Oite the image forming equipment for forming an image,
Control means for controlling a bias applied to the image forming apparatus;
The control means includes
When the developer amount detection unit corresponding to the developer storage unit selected as the detection target performs the developer amount detection,
Image forming apparatus characterized by suppressing or stopping a predetermined bias except applied resolver biased to said developer amount detecting means. The predetermined bias is:
An image forming bias applied to an image forming unit corresponding to the developer containing unit adjacent to at least the developer amount detecting unit corresponding to the developer containing unit selected as a detection target. The image forming apparatus according to claim 1. The image forming bias applied to the image forming means is
The image forming apparatus according to claim 2, wherein the possible der Rukoto be varied depending on the environment or usage. The image forming bias is:
4. The image forming apparatus according to claim 2, wherein the developing bias is applied to the developing unit . The image forming unit includes:
An image carrier that forms at least an electrostatic latent image;
A charging means for charging the image carrier,
The image forming bias is:
The image forming apparatus according to claim 2 , wherein the image forming apparatus is a charging bias applied to the charging unit .