| 摘要 |
The attachment device is adapted to be mounted to the delivery end of an offset duplicating machine and includes: a frame; an impression cylinder rotatably mounted to the sidewalls of the frame; a gripper bar device which is also rotatably mounted to the sidewalls of the frame and which is disposed between the duplicating machine and the impression cylinder, the gripper bar device including a gear wheel in meshing engagement with a gear wheel of the duplicating machine and with a gear wheel on the impression cylinder, the gripper bar device further including a series of members for gripping a sheet received from the duplicating machine and for conveying it to gripping elements on the impression cylinder; and character printing means mounted to the frame, including a gear wheel in meshing engagement with the gear wheel of the impression cylinder and a character numbering device rotatably mounted to contact successive sheets conveyed on the impression cylinder so as to print consecutive characters thereon. Means are also provided to avoid the printing of a character and the changing of a character should there be a void in the successive feeding of sheets in the attachment.
|
