Patent ID: 8505350

Claim:
A method of preparing a stress induced plastically deformed container for use as a threaded sealable container, comprising: moving a plastically deformable container relative to a first threading roller and a second threading roller, the container including a curved wall defining an open end; positioning the first threading roller inside an open end of the container and positioning the second threading roller outside the open end of the container; moving the first threading roller and the second threading roller relative to each other into contact with opposite sides of the curved wall defining the open end, wherein the first threading roller is associated with a first cam roller and is moved by moving the first cam roller along a first cam and the second threading roller is associated with a second cam roller and is moved by moving the second cam roller along a second cam, the first cam roller being separate from the second cam roller, the second cam being separate from the first cam; and automatically orbiting the two threading roller about the container to impart a helical thread onto the curved wall.