Disclosed is an image data transmission apparatus (1) such as a facsimile apparatus for transmitting the image data of the original being read by a reading unit (4) detachably installed in the transmission apparatus main body.
In such image data transmission apparatus, when the unmounted state of the image reading unit is detected by the mounting state detecting means (15), the control means (30) stops the original conveying roller.
The control means may be designed also, for transmitting the image data of the original. The transmission apparatus main body comprises:
means for terminating the reading action of the image and cancelling the connection of the transmission line for transmission of the image data when reading the original with the image reading unit dismounted from the transmission apparatus main body, and the signal from the relative moving state detecting (19) means stops for a predetermined period.
Further disclosed is an image data transmission apparatus comprising a transmission apparatus which transmits the image data by using a telephone line.
The transmission apparatus main body comprises means for controlling the processing of the image data transmission apparatus, responding to the output of the mounting state detecting means, the open state detecting means (34) and the memory, so that, while reading the image data, (a) in the case of being detected the open state, the read image data may be transmitted, (b) in the case of not being detected the open state, (b1) when detected the mounting state of the image reading unit, the image data may be printed out by the printer (39), (b2) when not detected the mounting state of the image reading unit, the image data may be stored in the memory for transmitting.