The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 1992
Filed:
May. 17, 1990
Wolfgang Siems, Hamburg, DE;
Matthias Overath, Hamburg, DE;
Korber AG, Hamburg, DE;
Abstract
The density of a trimmed stream of tobacco particles on a radiation-permeable conveyor is ascertained by directing a first beam of infrared light against the trimmed stream so that the light must pass through the stream and through the conveyor prior to reaching a detector which transmits to an evaluating circuit signals denoting the density of the trimmed stream. Such signals are corrected, when necessary, by signals which are generated by a second detector serving to monitor the intensity of infrared light which has passed only through the conveyor, and the corrected signals are used to regulate the operation of a trimming device which converts an untrimmed stream into the trimmed stream. Signals from the second detector indicate the extent of permeability changes of the conveyor as a result of accumulation of solid and/or liquid substances in or on the conveyor, and such signals can further serve to warn the operators that the conveyor is damaged and/or to modify the intensity of light which is caused to pass through the stream and through the conveyor and/or to modify the intensity of light which passes only through the conveyor.