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:
Aug. 05, 2014
Filed:
Jun. 23, 2011
Yoshichika Takizawa, Nagoya, JP;
Tatsuhiro Kurashima, Nagoya, JP;
Masayoshi Ono, Nagoya, JP;
NSD Corporation, Nagoya-shi, JP;
Abstract
There is provided a needle thread tension controller that can control a magnitude of tension on a needle thread for each stitch, that can draw the needle thread with a slim chance of occurrence of a thread break, that easily, accurately detects occurrence of the thread break when the thread break has occurred, and that does not cause any excess or deficiency of a quantity of accumulated thread, which would otherwise be caused by drawing a needle thread. There are provided an upstream grip sectionand a downstream grip sectionfor gripping a needle thread and a turning sectionfor turning the needle thread. In a torque control zone, rotating force is imparted to a turning arm in accordance with a torque value.