Abstract: An air and liquid-tight container is capable of storing different substances in different compartments sealingly separated by a front gasket having two separate parts that are independently slidable. A rear gasket is connectable to a push rod so as to function as a plunger, the front gasket being slidable in response to sliding of the rear gasket, thereby enabling the substance in the rear compartment to be introduced into the front compartment through a bypass. The front and rear gaskets are encased in the tubular body at a compressibility C (%) of 2% to 10%, with the product of the compressibility and the contact area (mm.sup.2) of the gaskets with the inside wall of the tubular wall falling within the range of 150 to 400.

Abstract: The seat and back of a seating unit are each formed of a plurality of cushioned upholstered elements which extend between a pair of L-shaped support members to provide continuous back and seat surfaces. The L-shaped members have an elliptical cross section which includes two hollow semielliptical portions, a central wall connecting these portions, and two longitudinal channels on opposite sides of the central wall. The upholstered elements are attached to the L-shaped members by plastic guiding strips which ride in the channels.

Abstract: Disclosed herein is a system in which a number of structural members are used to form compound structures, particularly structures for furnishings, wherein there is a first connector essentially consisting of a central tubular body with a prismatic or cylindrical surface provided with at least one slot of a given length, open at one end and extending upwards along the median plane on each face of the said surface and of a number of crossed fins protruding from the top and from the bottom of the said central body, the intersection line of the said fins coinciding with the axis of the said central body; a second connector identical to the first, except for the fact that the said central body is sealed at the top by a flat surface; a bar having in the proximity of both of its ends, a slot, open at one end, which fits into one of the said slots in the central body of the connector; a tube of a section identical to that of the central body of the connector; the said fins being designed to slide into the said tube