Apparatus for treatment of solid material

US5515775A · kind A · utility

Assignee

• Philip Morris Inc. · US

Inventors

• John C. Crump, III · Richmond, US
• Eugene B. Fischer · Chester, US
• Robert C. Wilson, Jr. · Woodbury, US
• Warren D. Winterson · Chester, US
• Leif E. B. Jaxmar · Vallåkra, SE
• Gustav M. Norberg · Bjärred, SE
• Lennart Olsson · Nyhamnsläge, SE

Key dates

• Filing date: May 25, 1994
• Grant date: May 14, 1996
• Expiry date: May 25, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65G2207/24
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

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.