The present invention relates to a processing device of a sequence of video images intended to be displayed by a digital cinema projection system, a projection system for the digital cinema and a video signal designed to be used by such a system. The copolymer has an \u03b1-olefin content of 5 to 20 percent by weight aud shows at least two CRYSTAF peak temperatures differing by at least 15\xb0 C. The blank is clamped between a downholder and a counter support surface of the lower tool part. The principal axis of the holding surface is arranged set off andor tilted relative to the axis of rotation of the coupling part. Data is returned to the received read request in response to returning data to the at least one previous read request. The system reduces the level of harmful constituents within the exhaust before the exhaust is recirculated.