Image forming device that detects appropriateness of toner...

Details Image forming device that detects appropriateness of toner... Image forming device that detects appropriateness of toner...

2005-07-12

2005-07-12

Grainger, Quana (Department: 2852)

Electrophotography

Diagnostics

Consumable

C399S029000

Reexamination Certificate

active

06917769

ABSTRACT:
Developing cartridges, each including a developing roller for carrying toner, are detachably mounted in a color laser printer. A drive current of a motor driving the developing rollers is detected as a load applied to a driving motion of the motor. If appropriate toner is being used, then the detected drive current is equal to or less than a predetermined value. However, if inappropriate toner is being used, then the detected drive current is greater than the predetermined value. In this case, printing is canceled so as to prevent formation of images with inappropriate toner and potential damage to the color laser printer.

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