Metal working – Method of mechanical manufacture – Electrical device making
Patent
1996-02-16
1998-02-03
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
295641, 295646, 128641, 156226, 156252, 156291, 156293, H01R 4316, B23P 2300
Patent
active
057131287
ABSTRACT:
A method of making a return pad for an electrosurgical system comprises the following steps. A first step includes die cutting an electrically conductive foil on a backing using a rotary press to create a foil blank. A second step includes peeling the conductive foil from around the blank, and leaving the blank on its backing. A third step includes layering electrically conductive gel together with the die cut foil to form a layered sheet. A fourth step includes blanking the return pad from the layered sheet using a rotary die. The rotary die has cutting edges and a die packing material adjacent to at least a portion of the edges. The die packing material compresses the gel prior to cutting. The compression is preferably sufficient to cause elastic deformation in the gel so that the gel retracts after being cut. The retraction of the gel leaves a border around the edge of the pad. The border region helps prevent the possibility of the gel coming into electrical contact with an unintended object. One of the advantages of the method of manufacturing disclosed herein is that a continuous rotary process can be used to manufacture electrosurgical return pads. The continuous nature of the process increases the efficiency of the manufacturing operation. The apparatus for using the method is also disclosed.
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Schrenk Charles Thomas
Talmage Douglas Phil
Akers Lawrence C.
Arbes Carl J.
Passman Aaron
Richardson Peter C.
Valleylab Inc
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