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:
Nov. 07, 1978
Filed:
Aug. 10, 1977
Applicant:
Inventor:
Lionel J Coulombe, Matawan, NJ (US);
Assignee:
The Singer Company, Elizabeth, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
D05B / ;
U.S. Cl.
CPC ...
112254 ;
Abstract
Thread tension discs for sewing machine thread tension devices which urge thread in toward the center of the device. Complimental indentations in the surface of the discs at the point of entry of thread into the device so change the angle of the edge of the discs at the point of entry that the thread has a tendency to work its way into as opposed to out of the device.