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:
Oct. 01, 1985
Filed:
Apr. 24, 1984
Peter Brand, Hamburg, DE;
Heinz-Christen Lorenzen, Wentorf, DE;
Uwe Heitmann, Hamburg, DE;
Peter Menzel, Hamburg, DE;
Hauni-Werke Korber & Co. K.G., Hamburg, DE;
Abstract
The diameter of a continuous filter rod is monitored in a tubular nozzle through which successive increments of the rod are conveyed axially and which directs against the external surface of the tubular envelope of the rod a narrow annular stream of compressed air at a pressure which does not result in deformation of the envelope. The thus admitted air is permitted to escape into the atmosphere only by way of two narrow passages which flank the region of contact between the air stream and the envelope. A flow meter indirectly monitors the rate of flow of air through such passages and generates signals which are indicative of the diameters of successive increments of the envelope. The pressure of the air stream which impinges upon the envelope is constant. The permeability of the material of the envelope can be ascertained by a discrete testing unit, and the results of such test are processed with the results of monitoring of the diameter by a computer which transmits signals serving to adjust the machine, to actuate an alarm or to arrest the machine.