Importance

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Abstract

Disclosed is an improved hand instrument for driving staples in the form of small bits of string into sheets of soft material comprising a handgun-like body composed of a grip having a hand-operated lever fixed therein and a string ejection barrel having a hollow needle fixed at its outlet end and a slidable push rod fixed therein. The hand-operated lever is so operatively connected to the push rod that the push rod is driven and inserted in the hollow needle to eject small bits of string one after another from the hollow needle every time the hand-operated lever is pressed. The hand instrument uses a composite resilient mechanism to permit application to the hand-operated lever a fixed value of return force, thereby assuring that the hand-operated lever is used by applying a fixed value of pressing force thereto, and that one does not get much tired after using the stapler many hundred times without intermission.

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First Claim