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, 1981
Filed:
Mar. 29, 1979
Heinz Greve, Hamburg, DE;
Gunter Wahle, Reinbek, DE;
Hauni-Werke Korber & Co. KG, Hamburg, DE;
Abstract
A running tow of filamentary filter material is banded by a plurality of streams of compressed air which issue from the orifices of plenum chambers forming a row which extends transversely of the direction of transport of the tow. The streams which issue from the plenum chambers band discrete strip-shaped portions of the tow. The density of such strip-shaped portions is monitored at or downstream of the banding station, and the pressure of air in one or more chambers is increased or reduced when the monitored density of the respective strip-shaped portion or portions deviates from a desired density. The monitoring devices can utilize optoelectronic or electropneumatic transducers.