Importance

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Abstract

A stapler comprises a stapler head which accommodates a strip of wire staple blanks and is pivotable between a starting position and a working position, in which it is applied against a sheaf of papers. A staple shaper shapes the blanks into substantially U-shaped staples, and a staple driver releases the thus-formed staples from the strip and drives them one by one into the sheaf of papers. A pivotable operating device reciprocates the staple shaper and the staple driver. A drive device is adapted to pivot the operating device in such a manner that it causes the staple driver to drive a staple into the sheaf of papers in a driving stroke and causes the staple shaper to shape the following staple in a shaping stroke, as well as adapted to pivot the stapler head to its working position before the staple driver performs the driving stroke and retain it there during the driving stroke of the staple driver. The drive device synchronizes the pivotal movements of the stapler head and the operating device in such a manner that the staple driver performs a prolonged stroke in the driving direction and the staple shaper performs the last phase of the shaping stroke when the stapler head has left its working position in order to be pivoted back to its starting position.

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First Claim