Abstract: An apparatus for grinding and polishing without visible flaws a variety of different size and shape full-lead crystal workpieces. A conveyor supports the workpieces and runs through the apparatus housing. A workpiece calibrator is located proximate the entrance end of the housing. A plurality of grinders having an abrasive grinding surface within a range of coarseness are located downline of the calibrator. A plurality of polishers are located downline of the grinders. Control means raises and lowers the calibrator, grinders and polishers relative to the belt conveyor and the unfinished surface of the workpiece supported thereon. A method of automatically making a finished full-lead crystal ornament using an automated machine having a housing, conveyor, a plurality of motor-driven grinding heads, and a plurality of motor-driven polishing heads.

Abstract: In a method of grinding side end surfaces of substrates, spacers are interposed between the substrates to form a stack of the substrates and the spacers. The spacers are slightly smaller in size than the substrates. The stack of the substrates and the spacers are ground by a rotatable brush or pad on the side end surfaces of the substrates so as to smooth chamfered portions of the substrates together with the side end surfaces.

Abstract: An apparatus for grinding and polishing without visible flaws a variety of different size and shape full-lead crystal workpieces. A conveyor supports the workpieces and runs through the apparatus housing. A workpiece calibrator is located proximate the entrance end of the housing. A plurality of grinders having an abrasive grinding surface within a range of coarseness are located downline of the calibrator. A plurality of polishers are located downline of the grinders. Control means raises and lowers the calibrator, grinders and polishers relative to the belt conveyor and the unfinished surface of the workpiece supported thereon.A method of automatically making a finished full-lead crystal ornament using an automated machine having a housing, conveyor, a plurality of motor-driven grinding heads, and a plurality of motor-driven polishing heads.

Abstract: A plate-like glass material working device 1 provided with a breaking-off unit 2, an input unit 3 for inputting various breaking-off data items and commands to the device; a storage unit 5 from which data on the shape of a target plate of glass 300 stored beforehand therein is read out in accordance with a command from the input unit 3; a display unit 7 for displaying thereon the shape of the Target plate of glass 300 on the basis of the shape data read out from the storage unit 5 and displaying the shape of a plate-like glass material 6 to be worked, an end cutting line forming position and a pressing position on the plate-like glass material in accordance with breaking-off data and a command from the input unit 3; and a control unit 8 for controlling the operation of the breaking-off unit 2 in correspondence to the shape of the target plate of glass 300, the shape of the plate-like glass material 6, end cutting line forming position and pressing position displayed on the glass material on the display unit 7