Philip Morris Inc.

Leif E Jaxmar

Lennart F Olsson

Warren D Winterson

Eugene B Fischer

Robert C Wilson

John C Crump, Iii

Gustav M Norberg

Mark St John North

Eugene B Fisher

Nils S Selander

An apparatus is provided that comprises a self-stacking spiral conveyor that traverses through a circulating atmosphere. The atmosphere is manipulated by one or more chambers having an open side adjacent to the perforated sides of the spiral conveyor. Additional control over the circulating atmosphere may be achieved by injection or ejection of gas into one or more chambers.

Apparatus for treatment of solid material

An improved endless conveyer belt is provided which can carry minute particles of conveyed product such as are found in packed bed applications, without limiting the ability of the conveyor belt to articulate into a spiraling conveyor stack. The perforations in the foraminous bottom member of the conveyor belt can be dimensioned according to the size of conveyed products. The number and placement of the perforations can be chosen to alter gas flow characteristics of the belt.

Conveyor belt for treatment of particulate solid material

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Vallakra, Sweden

Leif E Jaxmar