The machine had a failure: a mold passed the lifter for the lids without lifting the lid. Responding to the (failure) alarm the operator tried to remove the lid. He did this without stopping the device. He approached the machine at the side without control panel and stepped on the frame. While trying to remove the lid the pushing device was activated and the operators' arm got stuck. After a few seconds the arm was released and the operator was able to alarm his colleagues.
There is no in-depth machine RI&E performed for the specific machine. The risk 'entrapment' when working with conveyors and lifting equipment is included in the basic risk assessment. As a control measure for this specific machine fences are placed (before the moving parts)