| 摘要 |
A packing sheet overlaying device for offset printing in which a packing sheet can readily be attached to and released from a cylinder of an offset printing machine or the like. The packing sheet is held in position at one end by a gripper which is attached to a bracket which is rotatably mounted on a cam lever shaft. A slot is formed in the bracket and a screw passes through the slot to secure the bracket to the cylinder to lock the packing sheet in place. When it is desired to change the packing sheet, the screw is loosened and the bracket rotated through an angle defined by the length of the slot to thereby form a gap between the gripper and the corresponding edge of the cylinder. The other end of the packing sheet is held in position by a tensioning mechanism including a tensioning knob provided to adjust the tension on the packing sheet.
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