having force multiplying means employed to relatively turn the container and cutting element about a fixed point to force the cutting element to traverse the container

Full Title

Hand- or power-operated devices for opening closed containers > Cutting devices, i.e. devices including at least one cutting element having one or more cutting edges for piercing through the wall of a closed container, e.g. can openers > having force multiplying means employed to relatively turn the container and cutting element about a fixed point to force the cutting element to traverse the container