Rollo assembly and open roof construction provided therewith

A rollo assembly is provided, comprising a flexible sun screen (5) having two longitudinal side edges, a rotatable winding tube (6) for winding on or off the flexible sun screen and two elongate guide members (7,8) cooperating with respective ones of the longitudinal side edges. Each longitudinal side edge is provided with a flexible elongate strip (10) attached to the sun screen for, in a guiding manner, engaging a respective one of the guide members (7,8). Said guide members are provided with a succession of rotatable guide wheels (12) cooperating with said elongate strips (10).