Floating Draw Plug and Method of Drawing Tube
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United States of America Patent
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app pub date -
Nov 6, 2015
filing date -
Nov 6, 2015
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Abstract
A floating draw plug for shaping tube comprises a necking body and a rib forming member. The necking body has an axis and a trailing end portion. The trailing portion has a cross-section that is symmetric about the axis and that converges toward the axis as it extends downstream. The rib forming member comprises helical protrusions and helical grooves. The helical protrusions and the helical grooves are aligned with the axis. The rib forming member is connected to the necking body in a manner such that at least a portion of the helical protrusions and at least a portion of the helical grooves extend downstream of the trailing portion of the necking body and such that the rib forming member is free to rotate about the axis relative to the necking body.
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