Abstract: A method and apparatus for removing clogging material from between abrasive grains of a grinding wheel. A pressurized blasting fluid is supplied to a blasting gun, which in turn sucks an abrasive particle-liquid slurry into the gun. The slurry is entraining in the stream of blasting fluid, causing the liquid to be broken down into mist particles, and the resultant stream is discharged against the surface of the grinding wheel at a pressure in the range of 2.0 to 3.5 kg/cm.sup.2.

Abstract: A method and apparatus for removing clogging material from between abrasive grains of a grinding wheel. A pressurized blasting fluid is supplied to a blasting gun, which in turn sucks an abrasive particle-liquid slurry into the gun. The slurry is entraining in the stream of blasting fluid, causing the liquid to be broken down into mist particles, and the resultant stream is discharged against the surface of the grinding wheel at a pressure in the range of 2.0 to 3.5 kg/cm.sup.2.

Abstract: A roller-type solder coating device for applying a coating of liquid solder to a workpiece. The device has a solder bath tank, a coating roller, and a nozzle connected to a pumping chamber provided in the tank to provide a flow of the solder bath to the coating roller. A trough is positioned underneath the coating roller and similarly connected to the nozzle so as to prevent direct re-entry of the solder delivered from the nozzle into the solder bath. The tank may be sealed and inert gas introduced therein to prevent oxidation of the solder contained within the tank. A second coating roller may be provided so as to permit simultaneous coating of opposite sides of a workpiece during its passage between the coating rollers.

Abstract: A soldering machine for simultaneously applying liquid solder to opposite sides of the leads of a lead frame having I.C. devices thereon. The machine has sidewardly spaced roller assemblies which define a vertically extending narrow nip therebetween through which the lead frame assemblies pass. A solder bath is disposed below the roller assemblies so that lower portions of the rollers dip into the bath and carry a solder film to the nip for application to opposite sides of the leads. A passage extends upwardly in isolation from the bath for permitting the lead frame to be fed vertically upwardly into and through the nip.