Importance

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Abstract

A powerized stapler device is disclosed including an electromagnet, preferably a solenoid, having a armature which is adjustable relative to the solenoid such that the permeable portions of the armature, in the non-energized condition of the solenoid, may be adjusted relative to the solenoid enabling the force exerted by the solenoid to be varied as a function of the initial position of the armature. In a further preferred embodiment, an extension of the armature is engaged with the stapler head whereby movements of the armature relative to the electromagnet also function to vary the space between the stapler head and the stapler anvil, adjustments to process thin work pieces functioning to reduce the spacing between stapler head and anvil as well as reducing the driving force exerted by the electromagnet. In a preferred embodiment, a sensor mechanism is provided which mechanically urges the stapler head toward or away from the anvil and shifts the position of the armature into or out of the core of a solenoid in accordance with the thickness of the work piece as sensed by the sensor mechanism.

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First Claim