US PATENT SUBCLASS 219 / 94
.~.~.~.~.~ By interposed button

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
78.01  DF  .~ For bonding with pressure (e.g., resistance welding) {16}
86.1  DF  .~.~ By spot bonding {12}
91.2  DF  .~.~.~ Methods {4}
92  DF  .~.~.~.~ Current limitation (e.g., by interposed insulation) {2}
94.~.~.~.~.~ By interposed button

DEFINITION

Classification: 219/94

(under subclass 92) Subject matter in which the current localizing means comprises a member which is interposed between either the workpiece and electrode or between the workpieces being bonded, said member becoming part of the bond.