Abstract: The drill of the invention comprises a drill head having at least one guide pad, at least one outer cutting insert located at the periphery of the drill head surface and at least one inner cutting insert, having an active cutting edge, located nearer to the center of the drill head surface. The active cutting edge of the inner insert is situated within the outer edge of the guide pad or pads. Preferably, a plurality of cutting inserts are so arranged on the drill head that the resulting cutting force at all engaged inserts is on a level with the outer end of the guide pads.

Abstract: Organic dispersions which can be cured with little shrinkage and are based on unsaturated polyester, copolymerizable vinyl or vinilydene compounds, thermoplastic polymers which are colloidally soluble and are incompatible with the polyester resin and an ethylene/vinyl acetate copolymer with high vinyl acetate contents show a good stability.

Abstract: The invention concerns a cutting insert, having the shape of an isosceles triangle, which comprises a polygonal flat plate the top and bottom surfaces of which intersect with two edge surfaces of equal length to define main cutting edges, and at least one other edge surface adjoining said two edge surfaces at two cutting corners while intersecting with the top and bottom surface at right angles. The plate has the shape of an isosceles triangle the base of which is formed by said other edge surface. Secondary cutting edges are provided. The invention also involves a rotary milling cutter provided with a plurality of the cutting inserts.

Abstract: A variable connector for interconnecting lengths of tubing to form frameworks. The connector consists of a central body member having a number of attachment points formed thereon and a series of separate connector members which are adapted to be releasably secured to desired attachment points on the body member by means of screws or the like. Any one of a number of possible connector configurations may therefore be obtained merely be securing the required number of connector members to the required attachment points on the body member.

Abstract: A process for the preparation of graft polymers from ethylene homopolymers or copolymers and olefinically unsaturated monomers, especially from ethylene/vinyl ester copolymers, in the presence of a radical forming agent in homogenous or heterogeneous phase, in which a mixture of (meth)acrylonitrile, at least one aromatic vinyl compound and vinylchloride are polymerized in the presence of an ethylene homopolymer or copolymer. The products obtained contain no ungrafted styrene/acrylonitrile copolymer and more than 80% by weight of the graft polymer is chemically almost uniform in structure. The products obtained according to the invention are eminently suitable for use as coating materials and as materials which can be thermoplastically processed.

Abstract: Copolymers with improved dimensional stability under heat consisting essentially of (meth)acrylonitrile, styrene and at least one aliphatic monoolefin with 2 to 8 carbon atoms.

Abstract: A thermoplastic moulding composition comprising:1. from 5 to 95 % by weight, based on component (1) and (2), of a polycarbonate of a divalent phenol,2. from 95 to 5 % by weight, based on component (1) and (2), of a graft copolymer comprisingA. at least one monovinyl aromatic compound,B. acrylonitrile and/or at least one acrylonitrile derivative, and optionallyC. a vinyl or allyl compound, on an ethylene/vinyl acetate copolymer as a graft substrate, and3. from 10 to 50 % by weight, based on the total moulding composition, of a brittle thermoplastic resin.

Abstract: Dispersions suitable for the manufacture of moulding compositions which can be cured with low shrinkage to give mouldings with excellent surfaces can be obtained by the addition of finely divided ethylene copolymers manufactured in aqueous emulsion to unsaturated polyester resins.

Abstract: Thermoplastic moulding compositions comprising1. 5 - 95 percent by weight of polycarbonates of divalent phenols2. 95 - 5 percent by weight of graft copolymers ofA. at least one aromatic monovinyl compoundB. acrylonitrile and/or its derivativesC. optionally a vinyl or allyl compound on ethylene/vinyl acetate copolymers.

Abstract: Pourable and pumpable, storage-stable organic dispersions which can be cured with little shrinkage comprising unsaturated polyesters, copolymerizable vinyl monomers, ethylene vinyl ester copolymers and optionally dispersing agents.

Abstract: Thermoplastic moulding compositions comprising1. 5- 95 % by weight of polycarbonates of divalent phenols2. 95- 5 % by weight of graft copolymers ofA. at least one aromatic monovinyl compoundB. acrylonitrile and/or its derivativesC. optionally a vinyl or allyl compound on ethylene/vinyl acetate copolymers.

Abstract: The invention concerns a cutting insert adapted for a cutting tool having mechanical insert-replacing mechanism. The insert has angularly interrelated side surfaces,- for resting in a corresponding V-shaped pocket in the cutting tool, said side surfaces extending parallel to the main cutting edge of the insert.

Abstract: Moulding compounds with improved impact strength and weather resistance comprising mixtures of polyvinylchloride and graft polymers prepared from ethylene/vinyl ester copolymers on which have been grafted units of monomer mixtures of aromatic vinyl compounds, (meth)acrylonitrile and aliphatic monoolefins.

Abstract: A tool holder for clamping an apertured cutting insert in an insert-receiving site in a holder body a provision of a clamping pin rotatably and pivotally received in a bore in the holder while extending into the aperture of the insert. The pin is axially disposed in the holder and provided with a threaded portion engageable in a locking plate fixed in an enlarged portion of the bore. When the pin is screwed into the locking plate it pivots into a position wherein the plate abuts against a shoulder abutment in the bore while a portion of the pin projecting into the insert urges the latter against lateral abutment in the site.

Abstract: Weather-resistant thermoplastic moulding compounds of mixtures ofA. copolymers of (meth)acrylonitrile, of at least one aromatic vinyl compound and of optionally at least one monoolefin, andB. a graft copolymer of an ethylene/vinyl ester copolymer as graft substrate and grafted polymerized units of (meth)acrylonitrile of at least one aromatic monovinyl compound and of optionally at least one aliphatic monoolefin.