JAM1, and JAM2 according to a place of occurrence.
JAM0 occurs when a front end of the paper fails to pass the first sensor a predetermined time after the paper printed was supplied. JAM1 occurs when the front end of the paper fails to pass the second sensor a predetermined time after the front end of the paper passed the first sensor. JAM2 occurs when a rear end of the paper printed fails to pass the second sensor a predetermined time after the front end of the paper printed passed the second sensor.
The jam may occur by an excessive image density and the jam caused by the image density may occur in a case that the image to be printed is dark or dense.
The dark image to be printedthe sensing part does not send any additional signal to the controlling part 10 and the printing continues in S190.
The sensing part 50 detects the occurrence of the paper jam. The sensing part 50 sends a paper jam occurrence signal to the controlling part 10 and the controlling part 10 transmits the indication signal to the indicating part 70. The indicating part 70 indicates the occurrence of the paper jam in S110.
A user manually confirms the indication of the paper jam occurrence of the indicating part 70, manually open a cover of the printer, and manually removes a paper jammed. The user closes a cover of the printer and the sensing part 50 confirms that the paper jammed is removed whenever the cover of the printer is closed,