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:
Dec. 25, 2012
Filed:
Jun. 20, 2011
Pietro Zenoni, Leffe, IT;
Giovanni Pedrini, Leffe, IT;
Luca Gotti, Albino, IT;
L.G.L. Electronics S.p.A., Gandino, IT;
Abstract
A knitting line comprises a plurality of yarn feeders from which a downstream machine draws respective yarns. The machine is provided with selection elements adapted to vary the state of selection of the yarn feeders in relation to the angular position of the machine. Each of the yarn feeders is provided with a stationary drum and with a yarn count sensor arranged to generate a pulse per each yarn loop unwound from the drum. A selection signal is periodically sent to the yarn feeders, which is indicative of the state of selection of the individual feeders in relation to the angular position of the machine. For each of the selected feeders, a threshold time interval is continuously calculated, which corresponds to the maximum interval between two successive pulses, above which it should be regarded that an accidental stop of the yarn has occurred, and is updated in real time as a function of the yarn-drawing speed, the delay from the last pulse is continuously measured and compared with the updated threshold time interval, and the downstream machine is stopped when the measured delay exceeds the updated threshold interval.