Method of and apparatus for making streams containing fibrous materials of the tobacco processing industry
AssigneeKorber AG
InventorsWolfgang Siems, Andrzej Radzio
Life of this patent
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Abstract
A stream of filter tow which has been sprayed with atomized plasticizer is advanced past two detectors each of which monitors the density of the stream in a different way and generates corresponding signals which are processed by an evaluating circuit to generate modified signals which are indicative of the percentage of plasticizer. The modified signals are used to regulate the operation of a pump which controls the rate of admission of plasticizer to successive increments of the tow.
Claims29
A method of making rod-like products of the tobacco processing industry, comprising forming a composite stream containing a fibrous material and a second material;
- conveying the stream along a predetermined path;
- a first measuring step including measuring the density of successive increments of the stream by directing radiation across the stream in at least one portion of said path, monitoring the characteristics of radiation which passes through the stream and generating first signals denoting the density of the stream;
- a second measuring step including measuring the density of successive increments of the stream in a manner different from that in accordance with said first measuring step and generating second signals denoting the thus measured density;
- and processing the first and the corresponding second signals to ascertain the quantity of at least one said materials in the stream.
Apparatus for making rod-like products of the tobacco processing industry, comprising means for forming a composite stream containing fibrous material and a second material;
- means for conveying the stream along a predetermined path;
- first measuring means for measuring the density of the stream, including means for generating first signals denoting the density;
- second measuring means for measuring the density of the stream in a manner different from density measurement by said first measuring means, including means for generating second signals denoting the thus measured density;
- and means for processing said first and second signals to ascertain the quantity of at least one of said materials in the stream.
Dependencies are inferred from the claim text.