(under subclass 166) Subject matter including a reciprocating member, a projection on said member to engage longitudinally spaced perforations in a motion picture film, and means to withdraw the projection from the film on alternate carrier strokes to effect an intermittent advance.
SEE OR SEARCH CLASS
226, Advancing Material of Indeterminate Length,
62+, for material advancing structure generally involving feed claws which engage perforations in the advanced material.
