The idler brake is an eddy current brake. The brake plate is mounted on the backside of the idler clips and the permanent magnets are mounted between the top motors and the clip rail. The permanent magnets are in the area of the line where a deceleration of the clips is necessary and no film is gripped. During the deceleration process the idler brakes make sure that the idler clips are always in contact with the driven clips. This would be the perfect operating situation.