| CPC B29C 66/8322 (2013.01) [B29C 65/0618 (2013.01)] | 3 Claims |

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1. A retrofitting kit for a vibration welding device for welding a first component to a second component or to a stack of welded components having a vibration welding head which vibrates during use in a first plane, along a first axis X, wherein the retrofitting kit comprises a clamping arrangement having at least two clamping devices, each having a clamping surface which is moveable along the first axis X between a clamping position and an open position so that in the clamping position a movement of the second component or the stack of welded components at least along the first axis X can be hindered during vibration welding.
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