Abstract: A film transport device for a film with two uniformly distributed rows of holes. Transport is accomplished with a film transport sprocket with a series of teeth disposed in spaced array along a cylindrical tooth circle, which teeth engage the holes in the film and whose tooth circle is driven by a drive motor. A pressure skid brings the holes in the film into engagement with the teeth of the film transport sprocket. Each sprocket tooth has a root portion that merges with the cylindrical tooth circle structure. A base portion adjacent the root portion directly abuts the root portion and has a film support surface at a height relative to the surface of that tooth circle structure that corresponds to the thickness of the film.

Abstract: Control and regulating device for film transport in a film projector, with winding plates (62, 72) located on both sides of a film gate (8) and drivable by a single motor (61, 71), and with supply and takeup devices (3, 4) likewise disposed between the winding plates (62, 72) and film gate (8), the devices being drivable by at least one drive motor (51) to produce film loops on both side of the film gate (8) and with a transport device (2) between the supply and takeup devices (3 and 4). The drive motors (21; 51; 61, 71) for the winding plates (62 and 72), supply and takeup devices (3 and 4), and film transport device (2) are connected with sensors (25; 55; 65, 75) to detect the rpm and/or rotational direction, so that when a presettable rpm is exceeded or when one of the drive motors (21; 51; 61, 71) rotates in a rotational direction counter to the rotational direction predetermined by a higher-order operating control, all drive motors (21; 51; 61, 71) are braked simultaneously.