Abstract: A can opener has two relatively pivotable body portions (1,2), one carrying a rotary cutting wheel (8) and the other a rotary traction wheel (12) having parallel axes, the opener being arranged to receive the rim (R) of a can (C) between the two wheels and to orbit the can as the traction wheel is rotated while the cutting wheel makes a peripheral cut, the traction wheel (12) being shaped to distort the rim during cutting and the cutting wheel (8) having an outwardly angled body portion (10c, 10d), adjacent its cutting tip (10a, 10b), the angled body portion being adapted to contact the outside of the rim below the cut to exert a force in the opposite direction to the traction wheel (12).

Abstract: A can opener has two relatively pivotable body portions, one carrying a rotary cutting wheel and the other a rotary traction wheel having parallel axes, the opener being arranged to receive the rim of a can between the two wheels and to orbit the can as the traction wheel is rotated while the cutting wheel makes a peripheral cut, the traction wheel being shaped to distort the rim during cutting and the cutting wheel having an outwardly angled body portion, adjacent its cutting tip, then angled body portion being adapted to contact the outside of the rim below the cut to exert a force in the opposite direction to the traction wheel.

Abstract: A method of low pressure die casting in which molten metal in a furnace is forced up a riser tube into the die by gas pressure applied to the surface of the molten metal in the furnace by a pressure circuit, wherein as the level of the metal in the furnace falls after each successive die filling operation, the resultant increase in the time taken to exhaust the furnace pressure is utilised to produce compensatory incremental changes in the pressure applied in the circuit. The die casting apparatus for carrying out the method includes a remotely controlled pressure control valve which is controlled by a pressure adjusting means operable during the exhausting period of the furnace to apply the incremental changes in pressure to said valve. The apparatus may employ a single or a two-stage pressurisation.