Method of and apparatus for making and processing streams of fibrous material of the tobacco processing industry

US4865054A · kind A · utility

Assignee

• Korber AG · DE

Inventors

• Heinz-Christen Lorenzen · Bargteheide, DE
• Uwe Heitmann · Hamburg, DE
• Wolfgang Siems · Hamburg, DE

Key dates

• Filing date: Jan 29, 1988
• Grant date: Sep 12, 1989
• Expiry date: Jan 29, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S131/908
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

One or more streams of tobacco in a rod making machine are tested by several density monitoring units one of which employs a source of nuclear radiation and at least one other of which employs a source of optical radiation. The resulting density signals are evaluated and converted into signals which are devoid of the influence of changes of color and/or blend of fibrous material in the stream or streams and are used for segregation of defective rod-shaped articles and/or for controlled removal of surplus from the stream or streams.