US PATENT SUBCLASS 219 / 78.01
.~ For bonding with pressure (e.g., resistance welding)

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

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
78.01.~ For bonding with pressure (e.g., resistance welding) {16}
85.1  DF  .~.~> Brazing or soldering {9}
78.02  DF  .~.~> By solid-state bonding (e.g., diffusion)
78.11  DF  .~.~> Honeycomb {1}
78.13  DF  .~.~> With additional heating device
78.14  DF  .~.~> With work cleaning means
78.15  DF  .~.~> With work cutting means
78.16  DF  .~.~> With work deforming means (e.g., tube sealing)
79  DF  .~.~> With conveyer for workpiece {1}
81  DF  .~.~> Roller electrode {3}
86.1  DF  .~.~> By spot bonding {12}
95  DF  .~.~> Percussive {1}
97  DF  .~.~> Flash {2}
101  DF  .~.~> Butt {3}
108  DF  .~.~> Systems of current supply {7}
117.1  DF  .~.~> Methods {1}
119  DF  .~.~> Electrodes (e.g., structure) {1}

DEFINITION

Classification: 219/78.01

For bonding with pressure (e.g., resistance welding):

(under subclass 50) Subject matter relating to the bonding of metal by means of pressure while heated by the electric current.

(1) Note. The bond is usually, but not necessarily, a metal-to-metal weld.

(2) Note. The heat is generally created by resistance heating, but may, as in the case of indented subclasses 97+, be created by an electric arc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53, and 55, for rail bond resistance welding.

59.1, 61.1+, 61.2, 61.3, 61.4, 61.5, 61.6, and 61.7 for cylinder resistance welding subject matter.

76.17, for deposition welding by resistance heating.

603+, for this subject matter where the electric current is induced in the metal by electromagnetic or electrostatic induction.