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:
Jan. 29, 2008
Filed:
Oct. 06, 2005
Olav Birlem, Schwalmtal, DE;
Olav Birlem, Schwalmtal, DE;
Oerlikon Textile GmbH & Co. KG, Monchengladbach, DE;
Abstract
A yarn sensor for textile spinning and bobbin-winding machines for optically scanning a longitudinally traveling yarn () within a measurement gap (), particularly for detecting extraneous fibers, includes a light source (), a first receiver () for directly transmitted light, two further receivers () for light reflected from the yarn (), and light transmitting elements () between the light source (), measurement gap () and receivers (). In the absence of the yarn (), the receivers () detect projected images of the opposite wall () of the measurement gap (), located essentially outside both sides of the area of the wall () of the measurement gap () illuminated by the direct radiation of the light-emitting diode (). As a result, parasitic signals are suppressed, improving the detection of extraneous fibers.