Optical apparatus (DISFOCI1 to DISFOCI4) for focusing a beam of light for reading of a data medium moving past it, comprising, a main body (CPLI1 to CPLI4) disposed to fly above the data medium and at least one optical device (OPFOCI1, OPFOCI2, OPFOCI3, OPFOCI4, OPFOCI5) for focusing of the beam, the optical device being located such that its distance in relation to said medium remains constant. T...

A borehole logging tool and cryostat therefor to maintain a semiconductor detector at cryogenic temperatures. The cryostat has an elongate single-phase heat sink of solid, thermally conductive material on which the detector is removably mounted. The other end of the heat sink is arranged to receive a liquid cryogen or the cold finger of a helium refrigerator, which is removed before a logging run;...

The present invention relates to an enclosure member consisting essentially of solid, non-aromatic polymers that have a linear carbon to carbon backbone structure and have a plurality of free hydrogen atoms attached to the carbon atoms with a permeability to wet and dry solvents and fuels of less than 1/50, of the permeability of untreated enclosure members having a thickness of 1 mm, a portion of...

A process is described for preparing elastoplastic composition which comprises dynamically vulcanizing rubber with a thermoplastic blend of cured rubber and plastic.

A film-forming propylene copolymer composed of a major amount of propylene and a minor amount of ethylene, characterized by having (A) an ethylene content (Ec) of from 0.1 mole % to 2.0 mole % based on the total amount of propylene and ethylene, and (B) an isotactic value (Iso) in the range represented by the following formula (1) or (2), (i) when 0.1/=-5_E+96.3 (%) (1), and (ii) ...

It has been discovered that if a selected water-soluble aluminum, magnesium or zinc salt of a monovalent anion is added to an aqueous dispersion of a non-melt-fabricable tetrafluoroethylene polymer wherein the dispersion has a pH of 4 or less, the resulting dispersion will flow well on a woven fabric substrate, such as a woven glass fiber fabric, and will fill and cover the interstices of the weav...

A packaging propylene copolymer film consisting essentially of a random copolymer of propylene and an alpha -olefin having 4 or more carbon atoms or a random copolymer of propylene, an alpha -olefin having 4 or more carbon atoms and ethylene, said random copolymer satisfying the following conditions (1) to (3): (1) the content of the alpha -olefin having 4 or more carbon atoms in the copolymer ...

A polyamide film prepared from a polyamide composition comprised of at least 60% by weight of polytetramethyleneadipamide or a copolymer polyamide containing at least 60% by weight of a polytetramethyleneadipamide component, said film being at least monoaxially stretched at a stretching ratio of at least 1.5, said film having a characteristic value DELTA T of from 30 DEG to 60 DEG C. as determin...

A process for preparing a diamond thin film by an electron assisted chemical vapor deposition (EACVD) is disclosed, in which diamond crystal nuclei are caused to form and grow to a thin film on a heated plate substrate under electron bombardments in an atmosphere of a mixed gas of hydrogen and a hydrocarbon in a reduced pressure. A Boron doped p-type diamond semiconductor is prepared by an additio...

A packaging shrink film consisting essentially of a random copolymer of propylene and an alpha -olefin having 4 or more carbon atoms or a random copolymer of propylene, an alpha -olefin having 4 or more carbon atoms and ethylene, said random copolymer satisfying the following conditions: (1) the content of an alpha -olefin having 4 or more carbon atoms in the copolymer is 8 to 30 mole %, (2) th...

A method of preparing a composite of polyurethane bonded to the surface of a cured rubber substrate and the resulting composite. The method requires the rubber substrate to contain an hydroxyl terminated polybutadiene polyol. The method is practiced by first applying to a cleaned, cured rubber surface containing the polybutadiene polyol a coating of cyanuric acid followed by an additional coating ...

A method is disclosed for producing foamed phenolformaldehyde resins, wherein formaldehyde in acqueous solution, phenol, possibly a foaming agent, an inert filler, and an acidic catalyst are mixed together. The mixture is subjected to gentle heating, thereby the phenol-formaldehyde condensation and expansion of the resulting resin take place in a single stage.

A process for incorporating one or more additives, such as pigment, dye, stabilizer, antioxidant, and hardener, into the surface of a manufactured article based on a chloro-vinyl polymer, in particular polyvinylchloride, by coating the surface of the manufactured article with at least one polymeric film containing the additive or additives dispersed or dissolved therein.

A low density foam product is formed from a chlorinated polyvinyl chloride polymer (CPVC) composition containing a primary blowing agent and a nucleating system comprised of an alkali metal borohydride and a proton donor activator.

POLYACETYLENE PRODUCTION This invention relates to a process for producing an oriented, crystalline poly(acetylene) (III) in film or fibrillar form by solvent casting a film from a solution of a polymer of the general formula (V) derived from a precursor monomer (IV), and transforming the pre-cast film of polymer (V) under tension or in a stress field into the poly(acetylene) (III), The transforma...

The machine is of the type comprising rods defining the volume of the section element and extending in the longitudinal direction of the latter and a knitting head depositing threads around the rods in a direction perpendicular to the latter. The rods are thin hollow rods (12). A die (9) maintains the hollow rods in a fixed position parallel to each other in a configuration which corresponds to th...

In X-ray apparatus the beam radiated from an X-ray tube through a patient to a radiation receptor is transmitted through elongate windows in coordinated moving masks respectively located between the tube and the patient and between the patient and receptor so that the patient and the receptor are scanned by a moving fan shaped X-ray beam. The widths of the windows can be adjusted between minimum a...

An improved process for manufacturing a molded prosthetic device from a synthetic bioabsorbable polymer is disclosed. The process includes placing a solid amount of the polymer in a molding machine; melting the polymer by subjecting it to a temperature of from about 240 DEG to 255 DEG C. for about 2 to 5 minutes; transporting the polymer melt to an orifice; injecting the polymer melt from the ori...

(Meth)-acrylic acid esters of the formula in which R1 and R2 are each independently hydrogen, chlorine, fluorine or a C1- to C4-alkyl radical and R3 and R4 are identical or different and represent the group wherein Y is a divalent bridge member from the group and Z is a straight-chain or branched hydrocarbon chain which has 2 to 10 carbon atoms, can optionally co...

A quick-change coupler for the work implements of an excavator beam with an adjustable support frame (4) at the beam, said support frame receiving by means of a hook jaw a cross-pipe fixed to the tool. The hook (6) widens starting at its tip and is provided on its backside with a slanted surface (7) cooperating with a corresponding bevel (23) at the tool in order that, after the engagement between...