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. 28, 2021
Filed:
Sep. 04, 2019
Roj S.r.l., Biella Bi, IT;
ROJ S.R.L., Biella Bi, IT;
Abstract
A reflection optical sensor (F-F) for the detection of a weft thread in a weaving weft feeder (P) comprises a light emitter () and a light receiver () assembled on a relative supply printed circuit board () and housed in an arm (A) of the weft feeder which projects towards the front part of the weft feeder (P) and extends alongside the weft feeder drum (D) whereon the weft thread coils are wound, so as to form a path of direct light radiation, from said light emitter () towards a respective reflective surface (R) placed on said drum (D), and of reflected light radiation, from said reflective surface (R) to said light receiver (), for detecting the presence/absence of a weft thread running through said path. Said light emitter () and light receiver () are assembled with mutually parallel optical axes on said supply printed circuit board (). The optical sensor further includes a screening means () of the reflected radiation coming from said reflective surface (R) and directed towards said light receiver ().