| 摘要 |
An original document presser includes a pressing member for pressing an original document on an original carriage, a driver for driving the pressing member for its opening and closing, a detector for detecting that the pressing member is in a predetermined position, and a control unit for controlling the motion of the pressing member. The control unit has a first signal generator and a second signal generator. In response to the start of an image forming operation, the first generator generates a signal to make the driver close the pressing member, and in response to the end of the image forming operation, the second generator generates a signal to make the driver open the pressing member. The control unit controls also the operation of the driver at the start of an image forming operation by means of an output signal from the detector.
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