Back to results
US 2004/0168497 A1Published application
Container beading
AssigneeCrown Cork & Seal Technologies Corporation
InventorsPhilip John Knight, Alain Presset
Life of this patent
Estimating the term…
Abstract
Beading of containers such as two and three piece can bodies by rolling the can body between tools, typically a roll/roll or a roll/rail of a rotary turret (10) system. During beading, a load is applied along the central axis of the can body, whereby axial and panel performance of the beaded can is improved. This load is applied for example by the use of miniature air bags (19) which are fixed to the turret.
Claims9
A method of beading a container, the method comprising:
- mounting a can body on a first tool such that the can body is freely rotatable;
- moving the can body and first tool into contact with a second tool, such that the can body is clamped between the tools, at least one of the tools including a beading profile;
- applying a load along the central axis of the can body;
- and
- forming circumferential beads in the can body side wall by rolling the can body between the tools;
- characterised by applying a load which is a positive axial load and maintaining the positive axial load on the can body during bead formation.
3 more elements
An apparatus for beading a container, the apparatus comprising:
- a first roll for supporting a can body such that the can body is freely rotatable on the roll;
- and
- a fixed rail or second roll, the first roll and fixed rail or second roll having complementary bead profiles;
- characterised by means for applying a positive axial load of from 300 N to 600 N along the central axis of the can body during beading of the can body side wall.
1 more element
Dependencies are inferred from the claim text.