Abstract: This can opener opens and empties cans of their contents rapidly, especially paint and similar cans. The opener has a knife edge dimensioned and configured to penetrate an end, especially the bottom, of the can. There is a positioning means for disposing a can having two ends with one end over the knife edge. A means urges the can downward against the knife edge with sufficient force to cause the knife edge to penetrate the one end of the can. A means for receiving contents from the can is disposed beneath the knife edge. Cans may be opened and emptied in rapid sucession with this opener. An emptied can is moved forward by the positioning of a second can for opening and slides down into a can crusher. A piston operated can crusher cylinder is activated electro/pneumatically to come down and crush the emptied can and remove any remaining contents. When the piston retracts the crushed can drops out of the crusher.