Patent ID: 9085026
Filing Date: 2015-07-21
Classification: B21D

Abstract:
1. A seaming assembly configured to seam a can end onto a can body to form a seamed container, the seaming assembly comprising: a lifter chuck assembly that is configured to lift a can body, the lifter chuck assembly including a lifter plate that is configured to support the can body, and a compression spring disposed below the lifter plate; a seaming chuck including a drive surface that is configured to contact a portion of the can end during seaming and against which a seaming force is applied; and a knockout pad that is movable relative to the seaming chuck, the knockout pad is configured to (i) locate the can end and maintain engagement with the can end up until immediately after the can end engages the seaming chuck, and (ii) contact the can end to disengage the seamed can from the seaming chuck after seaming, wherein (i) the compression spring is preloaded to provide an axial force between about 30 lbf and about 90 lbf to the can body when the lifter chuck assembly has lifted the can body and the can end has contacted the seaming chuck, and (ii) the compression spring is preloaded such that the axial force provided to the can body during both a first seaming operation and a second seaming operation increases to between about 90 lbf and about 150 lbf after the compression spring has been compressed a specified distance.