Abstract: An apparatus for the infusion of a liquid contained in an infusion bag. The apparatus includes a plate for receiving an infusion bag, and a box having a closable lid. Interaction between the lid, the plate and an elastic spring mechanism located inside the box results in the expulsion of fluid from the infusion bag. The elastic spring mechanism includes four arms that articulate in pairs to form two cross structures that are biased together with springs. Respective ends of the two cross structures are connected by rollers, while opposing ends of the two cross structures are connected to inside portions of the box.

Abstract: The activation device has a cord pull (8) on which at a certain distance two catches (9) are firmly attached. Via a gear system (10) the cord pull (8) is connected to a shaft (23) which passes through sliding elements (24) and which is connected to gears arranged in the sliding elements with curtain strips (34). The curtain strips (34) can be pivoted about 180.degree. with the shaft (23). If the curtain strips (34) are against a stop, the latter can be moved in one of the longitudinal directions of the curtain rail, in which case one of the stops (9) is engaged with the front running sliding element (24a). By activation of the cord pull (8) thus the curtain strips (34) can be pivoted about their longitudinal axes or moved in the longitudinal direction of the curtain rail horizontally.