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:
Oct. 27, 1992
Filed:
Aug. 07, 1991
Luigi Pezzoli, Leffe, IT;
Rossano Maffeo, Ranica, IT;
Vamatex S.p.A., Villa di Serio, IT;
Abstract
A device to form the selvedge in shuttleless looms, includes a weft yarn gripping member, a first shaft reciprocable lengthwise to operate the weft yarn gripping member, a first linear electric motor to reciprocate the first shaft, a cutting member for cutting weft yarn gripped by the gripping member, a second shaft reciprocable lengthwise to actuate the cutting member, and a second linear electric motor for reciprocating the second shaft. A yarn engaging hook is carried by a needle to insert weft tails cut off by the cutting member, into a strip of warp yarns, thereby to form a selvedge. A third shaft carries the needle, from which said needle extends transversely. A third linear electric motor reciprocates the third shaft lengthwise. A sensor senses the reciprocated position of the third shaft thereby to control the third linear electric motor. A fourth linear electric motor rotates the third shaft. Another sensor senses the rotated position of the third shaft thereby to control the fourth linear electric motor. A microprocessor receives input from sensors and controls the operation of the motors and continuously varies the operation of the device.