Read the full judgment text of HCA 004049/1984 on BabelCite. This High Court CFI judgment.
1. The plaintiffs have an ingenious gadget for opening tins. It cuts through the cylindrical wall of the tin just below the rim so that the whole of the top of the tin including the rim comes away of a piece. The advantage over the more familiar method is that one does not have to struggle with the sharp edges at the top of a tin which has to be prized up if incompletely severed, or otherwise, retrieved from the contents. They call their device, aptly enough, the "lift-off" can opener.