A method of making coreless hollow filament bundles comprises winding a hollow filament 20 around a drum 22 having a number of axially extending vanes 24. The winding is formed in layers, each layer being a helix and adjacent layers being wound in opposite directions axially of the drum so that all the turns of the helix forming one layer cross all the turns of the helices forming the adjacent lay...

A continuous marine pipe laying system utilizes two rollers to overbend and straighten pipe as it is unwound from a reel. A support arm is pivotally connected to the axis of rotation of said reel and first and second roller arms are pivotally connected to the support arm at a point spaced from said axis of rotation. During use, the first roller is positioned at a point adjacent the pipe substantia...

PURPOSE:To eliminate yielding of plumage to the surface of the thread face, etc., and prevent the deterioration of the thread quality by making the crossing angle of a pair of guide bars, which hold and guide the thread end to the knotter, to an obtuse angle including a specific angle and reducing frictional force between the thread and the guide bars. CONSTITUTION:The sector gear 21 swings to the...

A continuous strip of puncture sealing material is applied to an inside surface of a tire by laying and adhering a plurality of side-by-side turns of the strip with the different turns connected by angular crossing portions in the area of a first circumferential position of the tire. The first crossing portion overlaps a first end of the first turn. The other end of the strip is tapered and overla...

There is disclosed a circuit arrangement comprising a microcomputer, wherein certain terminals of the microcomputer may be used as either input terminals or as output terminals under selective switching control so that a reasonably priced microcomputer with few terminals can be used to control complex functions such as those of a vehicle seat adjusting mechanism. The circuit arrangement also inclu...

The invention relates to a process for the preparation of a self-supporting, heat-insulating foam which is characterised in that a first mixture (A) of inert, anhydrous fillers comprising from 45 to 35% by weight of obsidian, from 27 to 30% by weight of aluminium silicate, from 19 to 23% by weight of kaolin (china clay) and from 9 to 12% by weight of granulated polytetrafluoroethylene, and a secon...

Polyesters are combined with UV-stabilizing substances in order to produce an end product, such as a film, sheet, ribbon or filament, by mixing polyester granules and the UV-stabilizing substance in powdered form at an elevated temperature such that at least the exterior surface of the polyester granules is soft, thereby to cause the powdered UV-stabilizing substance to adhere to the individual po...

Masterbatches useful for lightweight polyamide molding or extrusion comprise polyamide, a pore-forming agent and a fusible binder that is compatible with the polyamide. Admixture of the masterbatch and granular polyamide polymer results in a polyamide composition which can be molded or extruded into a product having increased homogeneity and expansion uniformity.

An improved acoustic signal generator has rotor and stator elements, each having a plurality of radially-extending lobes and intervening ports relatively positioned and configured to establish fluid dynamic forces that bias the generator into an open position, thereby imparting a <> characteristic to the generator. The rotor is located downstream of the stator, and rotor lobes are out...

A measuring device for a seismic profile within a well-bore includes resilient members such as springs which are flexible in at least two directions and are interposed between a geophone and a rigid arm connected to a measuring-tool body for applying the geophone against the wall of the well-bore during each detection of seismic waves generated at the ground surface. The elasticity of the resilien...

A distribution transformer and a method of making same. The transformer has at least one closed magnetic circuit in the form of a hollow toroidal coil made from ferro-magnetic steel ribbon. An electric circuit is formed by a primary winding and a secondary winding each constituted by one or more sub-assemblies in the form of a double pancake. These double pancakes are juxtaposed and molded togethe...

Granular or powdery phenol-aldehyde resin is prepd. for use as plastic material. Phenol and a compd. containing nitrogen are contacted with HCl-formadehyde bath containing 3-28 wt.% of HCl and 3-25 wt.% of formaldehyde and 0-10 wt.% of other aldehyde. The temp. of reaction system is below 45≰C and total conc. of HCl and formaldehyde is 10-40 wt.%. The contact reaction gives white suspension partic...

A coating composition for polyolefinic products, particularly films, which consists essentially of a solution of a three-component polymeric system comprising: (a) a vinyl or vinylidene copolymer; (b) a polymer or copolymer of acrylic esters; and (c) a polyester resin obtained by condensation. The coated products and the coating process are also described.

The invention provides a novel foamable vinyl chloride-based resin composition suitable for shaping into a cellular foamed body of high expansion and with good heat stability by extrusion using an extruder machine, in the cylinder of which the resin composition is heated and softened and then uniformly impregnated with a volatilizable blowing agent such as low-boiling aliphatic hydrocarbon compoun...

The subject matter of the invention is a method of curing an expansion-molded body of polyolefin prepared by heating the pre-expanded polyolefin particles filled in a mold. According to the method of the invention the molded body is cooled in the mold within the extent that the molded body in the mold retains its volume substantially 100% equivalent to the volume of the mold cavity. Then the molde...