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:
Sep. 13, 1994
Filed:
May. 21, 1993
Alain Lazzarotto, St. Clair de la Tour, FR;
Lindauer Dornier GmbH, Lindau, DE;
Abstract
In order to avoid or at least minimize weft thread breaking in an air nozzle loom, the supply of pressurized air to the relay nozzles is controlled in such a manner that the velocity of the blowing air is diminished toward the end of the weft thread insertion channel near its exit end. As a result, the tension on the weft thread is correspondingly reduced and the diminishing of the blowing air velocity can take into account any dynamic characteristics of the particular type of thread being inserted. Additionally, upon completion of the travelling weft thread insertion field, a weft thread tensioning field is imposed on the weft thread for properly tensioning the weft thread for the beat up. The tensioning following the insertion is applied only by selected nozzles or groups of nozzles, for example, by a group in the center of the weaving width and by a group toward the exit end of the insertion channel.