Metal Box Public Limited Company

Carnaudmetalbox Plc

John Clarke

Michael Curtis

Roderick M D'Eath

David L Allinson

Geoffrey H Rumble

David J Lusty

Derek E Haycock

Oven

An apparatus for, and a method of, heating a thermoplastic material in web form in readiness for forming three-dimensional objects therefrom in a thermo-forming process involves (a) advancing the web material intermittently through a heating zone on a belt conveyor without imposing thereon any mechanical stress-inducing physical constraints (such as may be applied by material gripping means), and (b) sweeping the web material with a series of hot air jets which are spaced apart in the direction movement of the material, which extend transversely across the width of the material, and which are reciprocated in that direction in a manner such as to ensure a uniform heating of the web material passing out of the heating zone to a thermo-forming apparatus.

Heat treating thermoplastic sheet materials for thermo-forming

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Faringdon, United Kingdom

John Clarke