Apparatus for threading cans
AssigneeBelvac Production Machinery, Inc.
InventorsHarold James Marshall, Jeffrey L. Shortridge
Life of this patent
Estimating the term…
Abstract
A threading turret assembly includes a plurality of threading heads. The threading heads comprise first and second threading rollers. The threading head is configured to impart a thread onto a metallic can such that a threaded cap may be screwed onto the can to seal an opening in the can. The turret assembly is configured to rotate such that the plurality of threading heads orbit the centerline of rotation about which the turret rotates. The turret is configured to impart a rotation onto the plurality of threading heads as the threading heads orbit the center of rotation.
Claims12
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.
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,
- wherein the step of moving the first threading roller and the second threading roller relative to each other into contact with opposite sides of the curved wall further includes moving a first support assembly, linked to the first cam roller that interfaces with the first cam, and a second support assembly, linked to the cam roller that interfaces with the second cam.
Dependencies are inferred from the claim text.