Abstract: A motion-picture-projection system has a top intermittent sprocket (1) and a bottom intermittent sprocket (6) that are rotated intermittently in unison by mechanical and/or electrical means (8, 9, 19, 20, 21, 22, 23, 24) for conveyance of film (3) through a film gate (4) without formation of loops of film between the top intermittent sprocket and the film-gate outlet sprocket. To compensate for differences of length of unreeled film due to its cyclic advance and film-frame stoppage, compensatory loops (16, 17) are formed prior to instead of after a top intermittent sprocket and after instead of before a film-gate outlet sprocket. A film-contact surface (25, 26) of a film gate is arcuate and bordered with non-abrasive and suitably pliable material to minimize film wear. Air can be pumped onto the film for cooling and for distortion contamination resulting from heat absorption formation that is related to film "breathing".