| 摘要 |
PROBLEM TO BE SOLVED: To improve the productivity of copied matters by making the stand-by time after the replacement of a toner container shortest, by installing an operating means for permitting an image forming operation, when a number of dots on an image to be developed at a developing station next, is less than a predetermined value, on the basis of the measured value of a dot number of developed image measuring means during the image formation prohibition time after the exchange of the toner container. SOLUTION: A number of image elements detecting means 22 measures a number of dots of an image to be developed in a developing station. An image forming device controlling circuit 16 permits an image forming operation, when the number of dots of the image to be developed in the developing station next, is less than a prescribed value Do , on the basis of the measured value of a dot number of developed image measuring means 22 during the image forming operation inhibition time after the replacement of the toner container 17. The image forming device controlling circuit 16 permits the image forming operation after it confirms that the toner supply to the developing station from a toner bottle 17 as the toner container, is performed at least once after the replacement it the toner container. |
