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:
May. 21, 1991
Filed:
Oct. 16, 1989
Applicant:
Inventor:
Fiorenzo Ghiardo, Vigliano Biellese, IT;
Assignee:
ROJ Electrotex S.p.A., Biella, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D03D / ;
U.S. Cl.
CPC ...
139452 ; 335256 ; 335257 ;
Abstract
An electromagnetic unit coacts with the winding drum of a weft feeding device to control unwinding of weft yarn from the drum. The electromagnetic unit comprises a movable stem surrounded by a pair of adjacent coaxial electromagnetic coils. Energization of one coil causes the stem to move into a position where it blocks unwinding of the yarn, whereas energization of the other coil retracts the stem and permits free unwinding of the yarn.