| 摘要 |
A power stapler having an improved clincher provides a stitcher head for driving formed staples into a stack of sheets. A clincher box (70) is positioned opposite the stitcher head. Clinchers (46) located in the clincher box pivot upwardly under the force of a moving clincher bar (74) to deform ends of the staple to pass through the sheet stack. The clincher bar includes a stop (76) that limits retraction of the clinchers into the box. Hence, as the staple is driven by the stitcher head through the sheets, the ends of the staple are brought into engagement with the clinchers and plastically deform into a substantially inwardly curled shape. Following driving of the staple by the stitcher head, the clincher bar (74) is actuated to rotate the clinchers (46) upwardly toward the stack causing the curled tips of the staple to drive into sheets.
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