| 摘要 |
PURPOSE: An official punch is provided to secure the position of punching blades accurately according to the distance between punched holes of documents. CONSTITUTION: An official punch comprises punching blades(8), punch holders(10), holder guides(20), and press plates(30). The punching blades descend in the vertical direction to punch holes on documents. The punch holders hold the punching blades to move. The holder guides are secured on a punch base(100) in which the documents are positioned, and accommodate the punch holders to slide up and down. The press plates are rotated about the holder guides and apply a vertical pressing force to the punch holders. The distance between the centers of the punch holder and the holder guide is different in each holder guide. |
