Ethicon, Gmbh

George Schob

Eugene D Reynolds

Robert Brown

Andrew John Schuessler

Geoffrey DeYoung

Mufutau G Olatunji

Gordon Stuart

A constant current annealing device for annealing a wire or surgical needle is disclosed. The device includes amplitude and time setting devices, such as thumb-wheel switches. A constant current source is connected to the current setting device. The constant current source is switchable, through a switch for example, in response to a timing signal to provide a constant current for a predetermined duration. A pair of spaced apart electrodes are clamped on the needle and a switching device is connected between the constant current source and the pair of electrodes. The voltage drop across the switching device varies to compensate for load variations, thus keeping the anneal current constant in the anneal ON mode. In the anneal OFF mode, where current is not provided to the needle, the switching device shunts a residual current away from the electrodes. The time setting device include a programmable logic controller (PLC) and a solid state relay to provide an accurate timing signal. A current measuring and monitoring device is connected to another PLC, which shuts down the annealing device after a predetermine number of alarms or after the constant current amplitude deviates by a predetermined amount.

Constant current needle annealing

A continuous process for electropolishing surgical needles. Surgical needles are mounted to an electrically conductive carrier strip. The carrier strip and needles are then moved continuously through an electropolishing bath and the needles are maintained in the bath for a sufficient period of time to effectively polish the needles.

Continuous process for electropolishing surgical needles

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Princeton Junction, NJ, United States of America

George Schob