Raychem Limited

Other

Robert J Ritter

Corey J McMills

Julian Sean Mullaney

William D Uken

Pradeep Barma

Barry C Mathews

John A Ross

Robert Seidel

John R Hughes

Johannes Maria Cordia

Jeffrey A Sampson

Johann D'Hondt

Hans Cordia

A dimensionally heat recoverable tubular article (,) is made by spirally wrapping cross-linked polymeric sheet (,) a number of times, and directly fusing together overlapping layers (,) of the cross-linked sheet (,) to form a consolidated tubular article. The final article has a wall thickness of at least 2.2 mm. Articles according to the invention may be made of different diameter and different wall thickness, starting from the same thickness initial sheet material, simply by changing the circumference of wrapping or the number of spiral wraps. Articles according to the invention are particularly useful as casings over joints between district heating pipes.

Heat recoverable article

A surge arrester designed for use with lines of 2 kV or less has a housing (10) which, in combination with a cup-shaped gasket (25), an O-ring gasket (45) and a lid (20), seals a varistor element (30) inside against environmental contaminants such as water or pollutants.

Surge arrester

Articles including a thin laminar heating element composed of a sintered conductive polymer, and electrodes attached to the heating element so that current flows in the plane of the element. The article can be placed between and in contact with two substrates, and then heated to join the two substrates together. Preferably at least one of the substrates is polymeric and becomes melt-fused to the article.

Methods and devices which make use of conductive polymers to join

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Fremont, CA, United States of America

Robert J Ritter