Abstract: In a friction welding machine a shear tool is provided for shearing flash off the welded workpieces at the weld zone which tool is interposable between one workpiece holder and the flash only after the workpiece holder and the flash have been relatively moved apart. The workpiece holder and the weld zone are then relatively moved towards one another to force the shear tool and the weld zone to traverse relative to one another so that the flash is completely sheared off the weld zone.

Abstract: A hand tool for extracting integrated circuit packs from printed circuit boards to which the pins of the pack have been soldered. The tool includes a pair of pivotable arms each of which carries an electrically heated tip. Each tip includes an inside face extending at a very slight angle to a plane bisecting the space between the faces and terminates in a bottom edge. The tool is arranged such that when the arms are moved toward each other the bottom edge of each tip clampingly engages and abuts the pins of a respective side of the pack at portions immediately adjacent to the printed circuit board solder joints but with the remaining inside surface of each tip remote from the remaining portions of the pins above the solder joints so that heat is applied to the pins at the joints but not appreciably to the circuit pack to effect the melting of the solder at the joints. Once the solder has melted the pack can be readily removed from the board.

Abstract: In the flow coating of inverted metal cans, an unhardened bead of excess coating material at the lower edge of the can is removed in a thinner bath through which the can is passed while hanging suspended from a conveyor. The thinner dissolves the bead and removes the coating on the lower edge of the can. The conveyor lifts the can out of the pool on a gradually rising path with the can hanging essentially vertical. Unhardened coating on the can sidewall above the area from which it has been removed, flows down and recoats the lower edge essentially uniformly but not to excessive thickness.