T&n Materials Research Limited

T&n Technology Limited

Turner & Newall Limited

The Bentley-Harris Manufacturing Company

Tba Industrial Products Ltd.

Bentley-Harris Inc.

Alan W Atkinson

Janet M Lancaster

Melanie Jane Walsh

Katryna J Dearden

Harry F Gladfelter

Robert A Lancaster

Christina Doyle

Kenneth T Somerfield

David T Pindar

Kenneth H Marshall

Sven T Denton

David N Smith

Richard H Clucas

David R Bridge

David R Hurst

Jody K Burnett

Kay L Robinson

Brian P Hodgson

Allen M Perkins

David Cater

Adrian M Steer

Alan James

A sleeving product and a method for making a sleeving product suitable for use as a barrier for resisting heat transfer between an external heat source and an elongated substrate, comprising: a tubular layer comprising a flexible, resilient foamed insulating material; and an exterior cover layer bonded to one surface of the tubular layer, the cover layer comprising a metalized polymeric film, the metalized polymeric film comprising a flexible polymeric film and a nonporous, thin coating of heat reflective metal applied to at least one surface of the polymeric film.

Reflective foam sleeve

Gasket manufacture

A thermal radiation baffle for apparatus for use in directional solidification of crystalline material, to be mounted at one end of a furnace, and to allow a mould containing the material in molten form to pass through, has at least one clamped layer of interconnected flexible strips of refractory material. Each such layer has an ordered construction, for example, with the strips being interwoven, or knitted; and has one or more slits therein. At least substantially the whole of each slit is inclined at a significant angle to the strips, so that the strips do not become detached or worn in use, but the layer is capable of resiliently engaging the sides of, for example, an irregularly shaped mould. A slit may be provided between two separate, but adjacent, pieces of the layer.

Thermal radiation baffle for apparatus for use in directional

A heat shield (10;40) comprises one or more metal members (14,24;44,46) defining a rigid enclosure (12;42) having a substantially continuous heat-reflecting surface (26 or 32; 50 or 52). The shield also comprises a plurality of sheets (30;48) of smooth flexible metal foil within said enclosure. The sheets are arranged one above the other, extend generally parallel to the heat-reflecting surface, and are free to touch one another.

Heat shields

A blind rivet (10) comprises a head (12), a shank (14) made at least partially of heat-softenable polymeric material, and force transmitting means (22, 24) operable to apply force to a portion (14a) of the shank (14) to cause it to deform to form a further head (30) opposed to the first-mentioned head (12). The rivet also comprises electrical heating means (26) arranged to be supplied with electrical current through the first-mentioned head (12) and operable to heat the deformable portion (14a) of the shank (14).

Blind rivet

Certain articles required to function in air at temperatures of 250.degree. C. or higher comprise very fine particles of vermiculite from which the interstitial magnesium ions have been at least partially removed and which has been swollen in water. These articles are not ordinarily exposed to water when in use, but if they are they are likely to disintegrate quickly because of the ready dispersibility of the vermiculite particles. By the invention, water-resistance is given to such articles by treating them with a solution of an aluminate salt e.g. NaAlO.sub.2 or a zirconyl salt e.g. ZrOCl.sub.2.

Water resistance of fine-vermiculite articles

A method of making a shaped article comprises mixing a refractory powder with an aqueous acidic phosphate solution, subjecting the mixture thus formed to high shear to form a plastic mass, shaping the mass, and hardening the shaped mass at a temperature below the sintering temperature of the refractory powder. By this method articles of useful hot-strength can be obtained without having to employ the high temperatures required for sintering.

Manufacture of shaped articles from refractory powder

Graphite gaskets with an improved release characteristic are treated with a finely powdered release agent such a graphite powder which is then pressed into the gasket surface.

Gaskets

A moulding composition comprising particles of gas-exfoliated vermiculite (a category which includes thermally exfoliated vermiculite) contains as binder very fine particles (diameter below 50 .mu.m) of vermiculite from which interstitial magnesium ions have been at least partially removed and which has been swollen in water. The composition is particularly suitable for the manufacture of articles required to function in air at temperatures above 250.degree. C., such as gaskets for the exhaust systems of internal combustion engines.

Vermiculite moulding compositions and articles made therefrom

Graphite gaskets with an improved release characteristic are embossed to form a relief pattern of relatively raised areas surrounded by predominantly interconnected depressions, followed by coating with a silicone rubber.

Gasket and process of making gaskets from exfoliated graphite

Graphite gaskets with an improved release characteristic are pressed (to reduce their void content) and then embossed with a pattern of relatively raised areas surrounded by interconnected depressions.

A housing for electrical or electronic equipment is made by moulding under heat a composition comprising an organic thermosetting resin which includes exfoliated graphite in an amount which is enough to impart to the moulded article an electrical resistivity not greater than 10 ohm-cm. The housing has an excellent capacity to reduce the level of electromagnetic radiation emitted by equipment within it and to shield electronic equipment from external electromagnetic radiation.

Housing for electrical or electronic equipment

A method of manufacturing an expanded graphite gasket comprises the steps of taking co-operating male and female mould members, the female mould member comprising a channel extending through a block from one face to a directly opposite face, the channel as seen in plan having a width and configuration corresponding to a desired gasket shape, presenting a substrate to one face of said block with said channel in register with said locations, filling the channel with a charge of expanded graphite particles, followed by pressing the charge with the male mould member onto the substrate to form a gasket thereon and thereafter removing the mould members.

A flat gasket incorporating a metallic reinforcement layer which is enclosed within the gasket in relation to one edge thereof is formed from relatively uncompacted, i.e. loose, expanded graphite particles by a method comprising the step of pressing such particles onto the opposed faces of said reinforcement substantially simultaneously to form compacted graphite foils in situ thereon while at the same time pressing some of said particles relative to said one edge to form a single unreinforced graphite foil portion extending from and integral with the other foils to enclose said one edge.

Process for the concentration of fibrous material in a mixture thereof with non-fibrous material, by subjecting an aqueous suspension of the mixture to centrifugal force in a hydrocylone to obtain an overflow enriched in fibre and an underflow of reduced fibre content, the aqueous suspension which is admitted to the hydrocylone being the fibre-enriched fraction which results from a preliminary classification in which an aqueous suspension of lower fibre:non-fibre ratio is submitted to flow under conditions which bring about settling out under ordinary gravitational force of material reduced in fibre content and formation of a fibre-enriched fraction above it. In the process, the underflow flow from the hydrocylone is incorporated in the aqueous suspension which is submitted to the preliminary classification. The process, which keeps to a minimum the amount of valuable fibre lost, is specially applicable to the concentration of fibres in the fibrous products (mineral wool) formed by disintegrating silicate and like mineral melts, which commonly contain relatively high proportion of granular material (`shot`).

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Rugby, United Kingdom

Alan W Atkinson