Abstract: A melamine-formaldehyde foam comprises from 80% to 98% by weight of at least one inorganic filling material, based on the total weight of the at least one inorganic filling material plus melmine-formaldehyde precondensate used for foam production, wherein the at least one inoganic filling material has a density of at least 3 g/cm3.

Abstract: An automatic valve for use in compressors or an otherwise non-return valve has a valve seat with passage channels which are controlled by a shutter blade (16). The shutter blade (16) includes a lock element (27) with concentric rings (19) connected together by radial cross pieces (29). The lock element (27) is guided by flexible guides (26). To enlarge the passage cross section through the valve and to improve the flow conditions, the guides (26), clamped on their outer rim, are guided radially inwardly from the clamping point with an outer cross piece (30); then pass over in the shape of an arch (31) with a relatively large radius of curvature into at least one ring section (32), which extends in the circumferential direction, and is provided with an outwardly directed bend (33), and in turn passes over in an inwardly directed arch (34) with an equally large radius of curvature into an inner cross piece (35), which adjoins the lock element (37).

Abstract: The riveting sleeve (6) described is used to connect the component parts (3, 4, 5, 10, 11) of compressor valves (2). The riveting sleeve (6) passes through the valve parts (3, 4, 5, 10, 11) to be connected to one another and is provided with at least one radial groove (16, 22, 26) which starts from the inner or outer generated surface (17, 18) thereof and weakens the wall thickness of the riveting sleeve (6) in this area. On the other side of the generated surface (17, 18) the groove (16, 22, 26) is adjacent either to the wall of a valve part surrounding it or surrounded thereby, or it has opposite it a recess (19, 23, 27) in the valve part (3, 5, 25) adjacent to the riveting sleeve (6). By upsetting the riveting sleeve (6) by means of an applied axial force, the riveting sleeve (6) is deformed radially outwards or inwards in the manner of a bead, it being securely clamped in or on the adjacent valve part.

Abstract: A valve for a piston-type compressor includes a valve seating with throughflow channels, a closure piece for controlling these channels, a spacer and a spring means urging the closure piece against the valve seating and supported on an arrester which at the same time forms the limit stop for the closure piece. In order to anchor the valve parts on the valve seating before the installation of the valve, at least one sleeve serving as a transport securing means and as an assembly aid is provided, which is secured at one end on the valve seating or on the arrester, and the individual valve parts are pushed in the correct installation position onto the sleeve. The other end of the sleeve is widened. A tension screw passes through the sleeve in an axial direction. The sleeve can be rolled into an undercut annular groove of the valve seating and at the outer surface of the arrester end flush with the latter.

Abstract: A container for holding contents as two separate components which can be mixed together later. The container comprises a cup positioned in a neck of the container for receiving a first of the components; a screwcap coordinated with the neck of the container and having a collar extending into the cup, a front edge of said collar forming a strike edge for separating the cup in the region of a line of intended breakage upon a further screwing on of the screwcap beyond a basic position for storage; and a wall of the cup has an annular step, and the strike edge of the collar comes flush on the annular step on the wall of the cup, the step--forming the place of intended breakage--being located at a distance above the bottom of the cup, there being a bead extending towards an outer surface of the collar and projecting inwardly from the inner surface of the wall of the cup, the step lying below said bead; and a clip shoulder is disposed on the collar and engages the bead of the cup wall.

Abstract: A two-component package comprises a cup arranged in a neck of the package to receive one component, and a screw cap. The cup defines an intended break line and cooperates with the neck of the package. A collar which extends into the cup, defines an abutment edge at the front end thereof. The abutment edge is disposed for separating the cup in the region of said break line upon a screwing of the cap.The cup defines a cup wall and an annular step therein.The step includes the break line spaced above the bottom of the cup.An inner surface of the cup wall has a bead inwardly directed therefrom. The bead disposed above the annular step engages against an outer surface of the collar.

Abstract: A gripping device for lifting and depositing slabs which are disposed on one edge thereof in an upright position is mounted in a mobile crane which is displaceable across a plurality of such slabs and comprises a row of support rods which are vertically displaceable in unison and each of which is provided at its lower end with a support member which is selectively rotatable into a position in which, when the rods are lowered into a position adjacent one side of a slab, the support member engages under the lower edge of the slab, and into another position in which it is disengaged from the said edge; furthermore a gravity operated holder member is provided which comes into engagement with the upper edge of the slab while the support rods are being lowered, and secures the slab against tilting during lifting and conveyance thereof.