Abstract: A stuffing-box packing for establishing a seal between a housing bore and a rotatable shaft which has at least one packing ring comprising expanded graphite and a pair of disc-shaped stripper elements which are comprised of a suitable plastic or metal. To ensure high tightness over a long service life, the packing ring is inclined relative to the radial plane of the shaft, is covered on both sides by a stripper element having an edge which makes coaxial and circumferential contact with the shaft, the laminate of packing ring and stripper elements is arranged between two support rings-which have oblique support surfaces inclined corresponding to the angle of inclination of the packing ring, and the thickness of the packing ring is such that the area of the shaft swept by the packing ring is at least almost completely subjected to the stripping action of the stripper elements.

Abstract: A method of bonding a roof tile to a roof substrate utilizing a two component polyurethane foam. The method includes the step of applying under low pressure a stream of a two component foamable liquid polyurethane on a roof substrate. Preferably, the foamable liquid polyurethane has a density in the range of about one and one-half to about two pounds per cubic foot and a reactivity period in the range of about one and one-half to about four minutes. Preferably, the foamable liquid polyurethane is applied at a rate of about two to about three pounds per minute. The roof tile is placed into contact with the foamable liquid polyurethane during the reactivity period of the foamable liquid polyurethane.

Abstract: A foam dispensing system and apparatus for mixing a plurality of foam components into an expanded foam and dispensing the mixed foam components, the apparatus having a body portion and a cartridge assembly mounted on said body portion. The cartridge assembly includes a mix chamber having a longitudinal bore and an aftermix chamber in communication with the mix chamber. The apparatus further includes inlets and passageways for supplying the plurality of foam components to the longitudinal bore of the mix chamber and a slidable valve rod for controlling the flow of the plurality of foam components into the mix chamber. A pressurized gas is injected into the aftermix chamber to aid in the mixing of the plurality of foam components and to provide an improved spray pattern of foam.

Abstract: A foam dispensing system and apparatus for mixing a plurality of foam components into an expanded foam and dispensing the mixed foam components, the apparatus having a body portion and a cartridge assembly mounted on said body portion. The cartridge assembly includes a mix chamber having a longitudinal bore and an aftermix chamber in communication with the mix chamber. The apparatus further includes inlets and passageway for supplying the plurality of foam components to the longitudinal bore of the mix chamber and a slidable valve rod for controlling the flow of the plurality of foam components into the mix chamber. A pressurized gas is injected into the aftermix chamber to aid in the mixing of the plurality of foam components and to provide an improved spray pattern of foam.

Abstract: A piston type of shut-off valve with a sealing ring made of expanded graphite. A plurality of ring-shaped lamellae are each stamped from a foil of expanded graphite and then joined to form a sealing ring. A peripheral edge surface of the sealing ring, rather than its planar facing surface, comes into sealing contact with the piston thereby improving its service life. Service life of the sealing ring can be further improved by using a guard ring on a facing surface of the sealing ring as well as by using an installed density for the sealing ring of 1.5 to 2.2 g/cm.sup.3.

Abstract: The invention is directed to a document shredder (1) driven by an electric motor (2), with a stepdown gear train (4, 5, 7, 8) arranged between the drive and the cutting mechanism (9). Hitherto these appliances were powered by AC motors, which operate already relatively slow cutting speed when shredding low quantities of paper sheet layers, and in which the breakdown torque occurs at a very early stage. Prejudices existed up to now against the use of DC motors in document shredders because of a number of reasons. In the invention a DC motor (2) especially a series-wound motor is now used as a drive for a document shredder (1). It has the decisive advantage, of enabling a high cutting speed with small quantities of paper layers, which decreases approximately continuously as a function of the quantity of paper layers, wherein stoppage is to be expected only with very high quantities of paper layers.

Abstract: The fluid valve comprises an integral housing made of forged steel, the housing having tubular end portions as fluid inlet and outlet, respectively, conical transition zones having a cone angle of at least 30.degree., and a central enlargement joined by said transition zones to said inlet and outlet ducts. The valve system is positively held between the transition zones. One of the transition zones may form the valve seat cooperating with an axially displaceable valve body.

Abstract: The present invention relates to a cock having a spherical plug which is supported between two annular sealing elements intended to seal the inlet channel and outlet channel thereof, of which two sealing members at least one consists of a resilient sealing member engaging said plug of said cock in an axially prestressed condition and of a coaxially located support member which limits the axial movement of said plug due to an operating pressure, which axial movement causes a deformation of the sealing member. In order to have an excellent sealing of the cock at unlimited temperature and simultaneously small operating moments the annular sealing element is shaped as a thin-walled sheet metal body which at one end is rigidly mounted to the casing of the cock and which sheet metal body comprises two coaxially arranged ring shaped sections, of which the one is shaped and arranged as deformable sealing member and the other is shaped and arranged as rigid support member mounted to said casing.

Abstract: A sealing system for a shutoff unit comprising two substantially ring-shaped sealing elements, one of which is tightly connected with the housing or with the blocking element of the shutoff unit and the other is either tightly connected with the blocking element or the housing or is formed thereat. The sealing elements are pressed against one another due to a closing movement of the blocking element for carrying out a shutoff action. The one sealing element is constructed as a thin-wall body of undulated or wave-shaped cross-section and elastically deformable under the action of the closing force, said elastically deformable thin-wall body extending over the ring width of the corresponding sealing element and in the closed position, with deformation of its wall, bearing by means of wave peaks protruding from one side of the thin-wall body against the other sealing element at least at two ring regions with line contact.

Abstract: A regular thread spool has at least one of its end flange disks provided with a sectionalized groove, the sections being axially offset to provide thread retention baffles.

Abstract: A sealing system for a shutoff element having two substantially ring-shaped sealing elements forming at least two substantially ring-shaped sealing lines. A given one of the sealing elements is constructed as a thin-wall body which is elastically deformable under the action of a closing force. The given sealing element, in the closed position of the shutoff element, under deformation of its wall bearing against the other sealing element at least at two ring regions with line contact. Means define free deformation spaces for the wall of the thin-wall body beneath said ring regions, and means define a respective support adjacent said deformation spaces and extending substantially parallel to the ring regions and against which bears said wall.

Abstract: A sealing system for a shutoff element having two substantially ring-shaped sealing elements forming at least two substantially ring-shaped sealing lines. A given one of the sealing elements is constructed as a thin-wall body which is elastically deformable under the action of a closing force. The given sealing element, in the closed position of the shutoff element, under deformation of its wall bearing against the other sealing element at least at two ring regions with line contact. Means define free deformation spaces for the wall of the thin-wall body beneath said ring regions, and means define a respective support adjacent said deformation spaces and extending substantially parallel to the ring regions and against which bears said wall.