Abstract: Construction element having a threaded portion for connection to a post and a spool-shaped portion for connection to a tube.

Abstract: A filter consisting of two endless belts of filter material having runs pressed together, of means pressing a run of one belt against the adjacent run of the other, and of a feed device for introducing the slurry between the runs.

Abstract: Apparatus for the working of plastic materials, including three separate portions consisting of two screw pumps between which lies a conical kneading rotor having radical fingers and rotating in a cylindrical housing.

Abstract: This invention relates to a grinding machine, and more particularly, to a machine for forming annular surfaces of revolution of irregular form.

Abstract: This invention relates to a material handling apparatus and, more particularly, to apparatus for use in industrial and excavating operations, wherein an articulated vehicle is associated with an accessory tool.

Abstract: Method and apparatus for the intermittent manufacture of multi-layer shaped thermoplastic parts with a foamed core and an unfoamed shell, where at first a part of the unfoamed plastic and later a plastic that contains a foaming agent is injected simultaneously with additional unfoamed plastic into a mold through a central nozzle and a ring nozzle that surrounds it.

Abstract: This invention has to do with a portable rostrum and, more particularly, to apparatus arranged to provide a stage for educational purposes and the like, which stage can be dis-assembled and carried to a remote area and re-erected without difficulty.

Abstract: An industrial brush having a base adapted to be mounted for rotation and having a plurality of strands extending from the base, each strand consisting of a tube braided from filaments of synthetic resin.

Abstract: A pulley whose outer surface is in the form of three tapered portions selected for use with a flat belt.

Abstract: Longitudinal shear for rolled sheet metal, particularly heavy plate, which operates perpendicular to the plane of the sheet, whereby the sheet can be gradually divided into two parallel strips by the action of successive partial cuts of a certain length; the sheet is made to move forwardly intermittently by means of drivers located before and after the shears and at least during each cutting stroke kept from shifting by the action of at least one pair of holding rollers located across the cut line.

Abstract: This disclosure has to do with a rivet setting tool, and, more particularly, apparatus for setting separable mandrel rivets. The apparatus includes a blocking plate which intersects the path of the mandrel at all times during the operation of the apparatus for setting, so that the mandrel is not propelled out of the tool while the tool is being operated. In this way, the operator is protected from being struck by the mandrel during operation of the tool to set the rivets.

Abstract: Driver for fasteners, wherein a slidable element contacts a work surface to allow fasteners to be driven, but otherwise inhibits the driving of fasteners.

Abstract: The present invention describes a process of producing block copolymers from monomers of different types by polymerization in two successive steps. The first step consists in polymerizing monomers of a first type by means of coordinated anionic catalysts comprising organo-metallic compounds of a metal of the Group IA, IIA, IIIA, or mixtures thereof of Mendeleev's Periodic Table of Elements, associated with a transition metal compound of Group IV to VIII and the second step comprises polymerizing a second type of monomer in the presence of the polymer formed in the first step and in the presence of free radical catalysts, wherein 0.01 to 100 moles of an adjuvant per mole of transition metal compound is added to the reaction medium of the first step and this adjuvant consists of a compound MY.sub.

Abstract: This invention has to do with a simulated brick formed of plastic, a method for making the brick, and a wall structure incorporating the brick and simulated mortar polyester plastic is cast in a polyvinyl chloride mold and a doctor blade or knife is passed over the mold depressing the mold edges and removing excess material so that the mold when released will spring back and a meniscus is formed by the plastic against the surrounding mold wall.

Abstract: A process for the preparation of polymers containing peroxide end-groups, in which one or more monomers, particularly alpha-olefins, are polymerized by means of a co-ordination catalyst in the presence of an adjuvant with the formula M(X)p, where M is boron or a metal in column IIb of the Periodic Table of Elements, p is the valency of M, and X is at least one monovalent organic radical, a hydrogen atom or a halogen, the polymer obtained is treated with a peroxidizing agent, without being de-activated, and the resulting polymer containing peroxide groups is collected.Polymers with peroxide end-groups obtained by this process, particularly olefins with peroxide end-groups, can be used to initiate polymerization of vinylic monomers, and are accordingly useful in the synthesis of block copolymers, in which one part is formed from the polymeric part of the macromolecular peroxide and the other part is derived from the vinylic monomer or monomers polymerized by means of this peroxide.

Abstract: The present invention relates to a new manner of grafting various organic groups or polymers; it is concerned particularly with the grafting of vinyl, acryl, vinylidene or other chains on polymers of olefines, diolefines, aromatic vinyl compounds and similar compounds; a new catalytic system is used for effecting such a grafting, wherein a deactivated polymer is brought into contact with at least one organometallic compound and at least one generator of free radicals out of the presence of air.

Abstract: Method and apparatus for the intermittent manufacture of multi-layer molded bodies of thermoplastic material with a foamed core and an unfoamed shell, wherein a strand of a nonfoaming plastic of ring-shaped cross-section enclosing a strand of plastic containing a foaming agent is injected into a mold.

Abstract: Injection molding apparatus for discontinuous fabrication of molded bodies consisting of a plurality of layers with a foaming core and an outer skin of non-foaming thermoplastic material, the apparatus consisting of an injection head connected to two extruders and equipped with a centrally-located jet surrounded by a ring jet.

Abstract: Apparatus for blow molding consisting of a preform station where a blank is shaped around a mandrel and a blow station where the blank is formed in a mold, the mandrel being removed from the blank and a compressed air member being applied to the orifice of the blank.

Abstract: Container suitable for accommodating a tape cassette.